Compose records in arg parser (#234)

Co-authored-by: patrick-conscriptus[bot] <175414948+patrick-conscriptus[bot]@users.noreply.github.com>

.config/dotnet-tools.json

@@ -3,13 +3,13 @@
   "isRoot": true,
   "tools": {
     "fantomas": {
-      "version": "6.3.9",
+      "version": "6.3.11",
       "commands": [
         "fantomas"
       ]
     },
     "fsharp-analyzers": {
-      "version": "0.26.0",
+      "version": "0.27.0",
       "commands": [
         "fsharp-analyzers"
       ]

.fantomasignore

@@ -0,0 +1 @@
+.direnv/

.github/workflows/assert-contents.sh

@@ -1,14 +0,0 @@
-#!/bin/bash
-
-echo "Unzipping version from NuGet"
-ls from-nuget.nupkg
-mkdir from-nuget && cp from-nuget.nupkg from-nuget/zip.zip && cd from-nuget && unzip zip.zip && rm zip.zip && cd - || exit 1
-
-echo "Unzipping version from local build"
-ls packed/
-mkdir from-local && cp packed/*.nupkg from-local/zip.zip && cd from-local && unzip zip.zip && rm zip.zip && cd - || exit 1
-
-cd from-local && find . -type f -exec sha256sum {} \; | sort > ../from-local.txt && cd .. || exit 1
-cd from-nuget && find . -type f -and -not -name '.signature.p7s' -exec sha256sum {} \; | sort > ../from-nuget.txt && cd .. || exit 1
-
-diff from-local.txt from-nuget.txt

.github/workflows/dotnet.yaml

@@ -73,6 +73,8 @@ jobs:
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
       - name: Build
         run: nix build
+      - name: Reproducibility check
+        run: nix build --rebuild
 
   check-dotnet-format:
     runs-on: ubuntu-latest
@@ -217,9 +219,12 @@ jobs:
 
   all-required-checks-complete:
     needs: [check-dotnet-format, check-nix-format, check-accurate-generations, build, build-nix, linkcheck, flake-check, analyzers, nuget-pack, expected-pack, github-release-plugin-dry-run]
+    if: ${{ always() }}
     runs-on: ubuntu-latest
     steps:
-      - run: echo "All required checks complete."
+      - uses: G-Research/common-actions/check-required-lite@2b7dc49cb14f3344fbe6019c14a31165e258c059
+        with:
+          needs-context: ${{ toJSON(needs) }}
 
   attestation-attribute:
     runs-on: ubuntu-latest
@@ -236,7 +241,7 @@ jobs:
           name: nuget-package-attribute
           path: packed
       - name: Attest Build Provenance
-        uses: actions/attest-build-provenance@bdd51370e0416ac948727f861e03c2f05d32d78e # v1.3.2
+        uses: actions/attest-build-provenance@6149ea5740be74af77f260b9db67e633f6b0a9a1 # v1.4.2
         with:
           subject-path: "packed/*.nupkg"
 
@@ -255,7 +260,7 @@ jobs:
           name: nuget-package-plugin
           path: packed
       - name: Attest Build Provenance
-        uses: actions/attest-build-provenance@bdd51370e0416ac948727f861e03c2f05d32d78e # v1.3.2
+        uses: actions/attest-build-provenance@6149ea5740be74af77f260b9db67e633f6b0a9a1 # v1.4.2
         with:
           subject-path: "packed/*.nupkg"
 
@@ -280,26 +285,17 @@ jobs:
         with:
           name: nuget-package-attribute
           path: packed
+      - name: Identify `dotnet`
+        id: dotnet-identify
+        run: nix develop --command bash -c 'echo "dotnet=$(which dotnet)" >> $GITHUB_OUTPUT'
       - name: Publish to NuGet
         id: publish-success
-        env:
-          NUGET_API_KEY: ${{ secrets.NUGET_API_KEY }}
-        run: 'nix develop --command bash ./.github/workflows/nuget-push.sh "packed/WoofWare.Myriad.Plugins.Attributes.*.nupkg"'
-      - name: Wait for availability
-        if: steps.publish-success.outputs.result == 'published'
-        env:
-          PACKAGE_VERSION: ${{ steps.publish-success.outputs.version }}
-        run: 'echo "$PACKAGE_VERSION" && while ! curl -L --fail -o from-nuget.nupkg "https://www.nuget.org/api/v2/package/WoofWare.Myriad.Plugins.Attributes/$PACKAGE_VERSION" ; do sleep 10; done'
-      # Astonishingly, NuGet.org considers it to be "more secure" to tamper with my package after upload (https://devblogs.microsoft.com/nuget/introducing-repository-signatures/).
-      # So we have to *re-attest* it after it's uploaded. Mind-blowing.
-      - name: Assert package contents
-        if: steps.publish-success.outputs.result == 'published'
-        run: 'bash ./.github/workflows/assert-contents.sh'
-      - name: Attest Build Provenance
-        if: steps.publish-success.outputs.result == 'published'
-        uses: actions/attest-build-provenance@bdd51370e0416ac948727f861e03c2f05d32d78e # v1.3.2
+        uses: G-Research/common-actions/publish-nuget@2b7dc49cb14f3344fbe6019c14a31165e258c059
         with:
-          subject-path: "from-nuget.nupkg"
+          package-name: WoofWare.Myriad.Plugins.Attributes
+          nuget-key: ${{ secrets.NUGET_API_KEY }}
+          nupkg-dir: packed/
+          dotnet: ${{ steps.dotnet-identify.outputs.dotnet }}
 
   nuget-publish-plugin:
     runs-on: ubuntu-latest
@@ -322,26 +318,17 @@ jobs:
         with:
           name: nuget-package-plugin
           path: packed
+      - name: Identify `dotnet`
+        id: dotnet-identify
+        run: nix develop --command bash -c 'echo "dotnet=$(which dotnet)" >> $GITHUB_OUTPUT'
       - name: Publish to NuGet
         id: publish-success
-        env:
-          NUGET_API_KEY: ${{ secrets.NUGET_API_KEY }}
-        run: 'nix develop --command bash ./.github/workflows/nuget-push.sh "packed/WoofWare.Myriad.Plugins.*.nupkg"'
-      - name: Wait for availability
-        if: steps.publish-success.outputs.result == 'published'
-        env:
-          PACKAGE_VERSION: ${{ steps.publish-success.outputs.version }}
-        run: 'echo "$PACKAGE_VERSION" && while ! curl -L --fail -o from-nuget.nupkg "https://www.nuget.org/api/v2/package/WoofWare.Myriad.Plugins/$PACKAGE_VERSION" ; do sleep 10; done'
-      # Astonishingly, NuGet.org considers it to be "more secure" to tamper with my package after upload (https://devblogs.microsoft.com/nuget/introducing-repository-signatures/).
-      # So we have to *re-attest* it after it's uploaded. Mind-blowing.
-      - name: Assert package contents
-        if: steps.publish-success.outputs.result == 'published'
-        run: 'bash ./.github/workflows/assert-contents.sh'
-      - name: Attest Build Provenance
-        if: steps.publish-success.outputs.result == 'published'
-        uses: actions/attest-build-provenance@bdd51370e0416ac948727f861e03c2f05d32d78e # v1.3.2
+        uses: G-Research/common-actions/publish-nuget@2b7dc49cb14f3344fbe6019c14a31165e258c059
         with:
-          subject-path: "from-nuget.nupkg"
+          package-name: WoofWare.Myriad.Plugins
+          nuget-key: ${{ secrets.NUGET_API_KEY }}
+          nupkg-dir: packed/
+          dotnet: ${{ steps.dotnet-identify.outputs.dotnet }}
 
   github-release-plugin:
     runs-on: ubuntu-latest

.github/workflows/flake_update.yaml

@@ -0,0 +1,57 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/SchemaStore/schemastore/master/src/schemas/json/github-workflow.json
+name: Weekly Nix Flake Update
+
+on:
+  schedule:
+    - cron: '0 0 * * 0'  # Runs at 00:00 every Sunday
+  workflow_dispatch:  # Allows manual triggering
+
+jobs:
+  update-nix-flake:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Update Nix flake
+        run: 'nix flake update'
+
+      - name: Build passthru
+        run: 'nix build ".#default.passthru.fetch-deps"'
+
+      - name: Run passthru
+        run: |
+            set -o pipefail
+            ./result | tee /tmp/passthru.txt
+            cp /"$(cat /tmp/passthru.txt | grep " wrote lockfile to " | cut -d / -f 2-)" nix/deps.nix
+
+      - name: Format
+        run: 'nix develop --command alejandra .'
+
+      - name: Create token
+        id: generate-token
+        uses: actions/create-github-app-token@v1
+        with:
+          # https://github.com/actions/create-github-app-token/issues/136
+          app-id: ${{ secrets.APP_ID }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
+
+      - name: Raise pull request
+        uses: Smaug123/commit-action@cc25e6d80a796c49669dda4a0aa36c54c573983d
+        id: cpr
+        with:
+            bearer-token: ${{ steps.generate-token.outputs.token }}
+            pr-title: "Upgrade Nix flake and deps"
+
+      - name: Enable Pull Request Automerge
+        if: ${{ steps.cpr.outputs.pull-request-number }}
+        uses: peter-evans/enable-pull-request-automerge@v3
+        with:
+          token: ${{ steps.generate-token.outputs.token }}
+          pull-request-number: ${{ steps.cpr.outputs.pull-request-number }}
+          merge-method: squash

.github/workflows/nuget-push.sh

@@ -1,24 +0,0 @@
-#!/bin/bash
-
-SOURCE_NUPKG=$(find . -type f -name '*.nupkg')
-
-PACKAGE_VERSION=$(basename "$SOURCE_NUPKG" | rev | cut -d '.' -f 2-4 | rev)
-
-echo "version=$PACKAGE_VERSION" >> "$GITHUB_OUTPUT"
-
-tmp=$(mktemp)
-
-if ! dotnet nuget push "$SOURCE_NUPKG" --api-key "$NUGET_API_KEY" --source https://api.nuget.org/v3/index.json > "$tmp" ; then
-    cat "$tmp"
-    if grep 'already exists and cannot be modified' "$tmp" ; then
-        echo "result=skipped" >> "$GITHUB_OUTPUT"
-        exit 0
-    else
-        echo "Unexpected failure to upload"
-        exit 1
-    fi
-fi
-
-cat "$tmp"
-
-echo "result=published" >> "$GITHUB_OUTPUT"

.gitignore

@@ -10,3 +10,4 @@ result
 .analyzerpackages/
 analysis.sarif
 .direnv/
+.venv/

CHANGELOG.md

@@ -1,5 +1,9 @@
 Notable changes are recorded here.
 
+# WoofWare.Myriad.Plugins 2.2.1, WoofWare.Myriad.Plugins.Attributes 3.2.1
+
+New generator: `ArgParser`, a basic reflection-free argument parser.
+
 # WoofWare.Myriad.Plugins 2.1.45, WoofWare.Myriad.Plugins.Attributes 3.1.7
 
 The NuGet packages are now attested to through [GitHub Attestations](https://github.blog/2024-05-02-introducing-artifact-attestations-now-in-public-beta/).

ConsumePlugin/Args.fs

@@ -0,0 +1,130 @@
+namespace ConsumePlugin
+
+open System
+open System.IO
+open WoofWare.Myriad.Plugins
+
+[<ArgParser>]
+type BasicNoPositionals =
+    {
+        Foo : int
+        Bar : string
+        Baz : bool
+        Rest : int list
+    }
+
+[<ArgParser>]
+type Basic =
+    {
+        [<ArgumentHelpText "This is a foo!">]
+        Foo : int
+        Bar : string
+        Baz : bool
+        [<ArgumentHelpText "Here's where the rest of the args go">]
+        [<PositionalArgs>]
+        Rest : string list
+    }
+
+[<ArgParser>]
+type BasicWithIntPositionals =
+    {
+        Foo : int
+        Bar : string
+        Baz : bool
+        [<PositionalArgs>]
+        Rest : int list
+    }
+
+[<ArgParser>]
+type LoadsOfTypes =
+    {
+        Foo : int
+        Bar : string
+        Baz : bool
+        SomeFile : FileInfo
+        SomeDirectory : DirectoryInfo
+        SomeList : DirectoryInfo list
+        OptionalThingWithNoDefault : int option
+        [<PositionalArgs>]
+        Positionals : int list
+        [<ArgumentDefaultFunction>]
+        OptionalThing : Choice<bool, bool>
+        [<ArgumentDefaultFunction>]
+        AnotherOptionalThing : Choice<int, int>
+        [<ArgumentDefaultEnvironmentVariable "CONSUMEPLUGIN_THINGS">]
+        YetAnotherOptionalThing : Choice<string, string>
+    }
+
+    static member DefaultOptionalThing () = true
+
+    static member DefaultAnotherOptionalThing () = 3
+
+[<ArgParser>]
+type LoadsOfTypesNoPositionals =
+    {
+        Foo : int
+        Bar : string
+        Baz : bool
+        SomeFile : FileInfo
+        SomeDirectory : DirectoryInfo
+        SomeList : DirectoryInfo list
+        OptionalThingWithNoDefault : int option
+        [<ArgumentDefaultFunction>]
+        OptionalThing : Choice<bool, bool>
+        [<ArgumentDefaultFunction>]
+        AnotherOptionalThing : Choice<int, int>
+        [<ArgumentDefaultEnvironmentVariable "CONSUMEPLUGIN_THINGS">]
+        YetAnotherOptionalThing : Choice<string, string>
+    }
+
+    static member DefaultOptionalThing () = false
+
+    static member DefaultAnotherOptionalThing () = 3
+
+[<ArgParser true>]
+type DatesAndTimes =
+    {
+        Plain : TimeSpan
+        [<InvariantCulture>]
+        Invariant : TimeSpan
+        [<ParseExact @"hh\:mm\:ss">]
+        [<ArgumentHelpText "An exact time please">]
+        Exact : TimeSpan
+        [<InvariantCulture ; ParseExact @"hh\:mm\:ss">]
+        InvariantExact : TimeSpan
+    }
+
+type ChildRecord =
+    {
+        Thing1 : int
+        Thing2 : string
+    }
+
+[<ArgParser true>]
+type ParentRecord =
+    {
+        Child : ChildRecord
+        AndAnother : bool
+    }
+
+type ChildRecordWithPositional =
+    {
+        Thing1 : int
+        [<PositionalArgs>]
+        Thing2 : string list
+    }
+
+[<ArgParser true>]
+type ParentRecordChildPos =
+    {
+        Child : ChildRecordWithPositional
+        AndAnother : bool
+    }
+
+[<ArgParser true>]
+type ParentRecordSelfPos =
+    {
+        Child : ChildRecord
+        [<PositionalArgs>]
+        AndAnother : bool list
+    }

ConsumePlugin/ConsumePlugin.fsproj

@@ -3,6 +3,7 @@
   <PropertyGroup>
     <TargetFramework>net8.0</TargetFramework>
     <IsPackable>false</IsPackable>
+    <OtherFlags>--reflectionfree $(OtherFlags)</OtherFlags>
   </PropertyGroup>
   <ItemGroup>
     <MyriadSdkGenerator Include="$(MSBuildThisFileDirectory)..\WoofWare.Myriad.Plugins\bin\$(Configuration)\net6.0\WoofWare.Myriad.Plugins.dll"/>
@@ -51,14 +52,17 @@
     <Compile Include="ListCata.fs">
       <MyriadFile>List.fs</MyriadFile>
     </Compile>
+    <Compile Include="Args.fs" />
+    <Compile Include="GeneratedArgs.fs">
+      <MyriadFile>Args.fs</MyriadFile>
+    </Compile>
   </ItemGroup>
 
   <ItemGroup>
     <PackageReference Include="RestEase" Version="1.6.4"/>
     <ProjectReference Include="..\WoofWare.Myriad.Plugins.Attributes\WoofWare.Myriad.Plugins.Attributes.fsproj" />
-    <ProjectReference Include="..\WoofWare.Myriad.Plugins\WoofWare.Myriad.Plugins.fsproj"/>
-    <PackageReference Include="Myriad.Sdk" Version="0.8.3"/>
-    <PackageReference Include="Myriad.Core" Version="0.8.3"/>
+    <ProjectReference Include="..\WoofWare.Myriad.Plugins\WoofWare.Myriad.Plugins.fsproj" PrivateAssets="all" />
+    <PackageReference Include="Myriad.Sdk" Version="0.8.3" PrivateAssets="all" />
   </ItemGroup>
 
 </Project>

ConsumePlugin/FSharpForFunAndProfitCata.fs

@@ -30,6 +30,12 @@ type ChocolateType =
     | Milk
     | SeventyPercent
 
+    override this.ToString () =
+        match this with
+        | ChocolateType.Dark -> "Dark"
+        | ChocolateType.Milk -> "Milk"
+        | ChocolateType.SeventyPercent -> "SeventyPercent"
+
 type Chocolate =
     {
         chocType : ChocolateType
@@ -43,6 +49,12 @@ type WrappingPaperStyle =
     | HappyHolidays
     | SolidColor
 
+    override this.ToString () =
+        match this with
+        | WrappingPaperStyle.HappyBirthday -> "HappyBirthday"
+        | WrappingPaperStyle.HappyHolidays -> "HappyHolidays"
+        | WrappingPaperStyle.SolidColor -> "SolidColor"
+
 [<CreateCatamorphism "GiftCata">]
 type Gift =
     | Book of Book

ConsumePlugin/RecordFile.fs

@@ -1,9 +1,5 @@
 namespace ConsumePlugin
 
-type ParseState =
-    | AwaitingKey
-    | AwaitingValue of string
-
 /// My whatnot
 [<WoofWare.Myriad.Plugins.RemoveOptions>]
 type RecordType =

Directory.Build.props

@@ -10,7 +10,7 @@
     <WarnOn>FS3388,FS3559</WarnOn>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Nerdbank.GitVersioning" Version="3.6.139" PrivateAssets="all"/>
+    <PackageReference Include="Nerdbank.GitVersioning" Version="3.6.143" PrivateAssets="all"/>
     <SourceLinkGitHubHost Include="github.com" ContentUrl="https://raw.githubusercontent.com"/>
   </ItemGroup>
   <PropertyGroup Condition="'$(GITHUB_ACTION)' != ''">

README.md

@@ -14,6 +14,7 @@ Currently implemented:
 * `JsonSerialize` (to stamp out `toJsonNode : 'T -> JsonNode` methods).
 * `HttpClient` (to stamp out a [RestEase](https://github.com/canton7/RestEase)-style HTTP client).
 * `GenerateMock` (to stamp out a record type corresponding to an interface, like a compile-time [Foq](https://github.com/fsprojects/Foq)).
+* `ArgParser` (to stamp out a basic argument parser)
 * `CreateCatamorphism` (to stamp out a non-stack-overflowing [catamorphism](https://fsharpforfunandprofit.com/posts/recursive-types-and-folds/) for a discriminated union).
 * `RemoveOptions` (to strip `option` modifiers from a type) - this one is particularly half-baked!
 
@@ -150,6 +151,73 @@ The same limitations generally apply to `JsonSerialize` as do to `JsonParse`.
 
 For an example of using both `JsonParse` and `JsonSerialize` together with complex types, see [the type definitions](./ConsumePlugin/SerializationAndDeserialization.fs) and [tests](./WoofWare.Myriad.Plugins.Test/TestJsonSerialize/TestJsonSerde.fs).
 
+## `ArgParser`
+
+Takes a record like this:
+
+```fsharp
+[<ArgParser>]
+type Foo =
+    {
+        [<ArgumentHelpText "Enable the frobnicator">]
+        SomeFlag : bool
+        A : int option
+        [<ArgumentDefaultFunction>]
+        B : Choice<int, int>
+        [<ArgumentDefaultEnvironmentVariable "MY_ENV_VAR">]
+        BWithEnv : Choice<int, int>
+        C : float list
+        // optionally:
+        [<PositionalArgs>]
+        Rest : string list // or e.g. `int list` if you want them parsed into a type too
+    }
+    static member DefaultB () = 4
+```
+
+and stamps out a basic `parse` method of this signature:
+
+```fsharp
+[<RequireQualifiedAccess>]
+module Foo =
+    // in case you want to test it
+    let parse' (getEnvVar : string -> string) (args : string list) : Foo = ...
+    // the one we expect you actually want to use
+    let parse (args : string list) : Foo = ...
+```
+
+Default arguments are handled as `Choice<'a, 'a>`:
+you get a `Choice1Of2` if the user provided the input, or a `Choice2Of2` if the parser filled in your specified default value.
+
+You can control `TimeSpan` and friends with the `[<InvariantCulture>]` and `[<ParseExact @"hh\:mm\:ss">]` attributes.
+
+You can generate extension methods for the type, instead of a module with the type's name, using `[<ArgParser (* isExtensionMethod = *) true>]`.
+
+If `--help` appears in a position where the parser is expecting a key (e.g. in the first position, or after a `--foo=bar`), the parser fails with help text.
+The parser also makes a limited effort to supply help text when encountering an invalid parse.
+
+### What's the point?
+
+I got fed up of waiting for us to find time to rewrite the in-house one at work.
+That one has a bunch of nice compositional properties, which my version lacks:
+I can basically only deal with primitive types, and e.g. you can't stack records and discriminated unions inside each other.
+
+But I *do* want an F#-native argument parser suitable for AOT-compilation.
+
+Why not [Argu](https://fsprojects.github.io/Argu/)?
+Answer: I got annoyed with having to construct my records by hand even after Argu returned and said the parsing was all "done".
+
+### Limitations
+
+This is very bare-bones, but do raise GitHub issues if you like (or if you find cases where the parser does the wrong thing).
+
+* Help is signalled by throwing an exception, so you'll get an unsightly stack trace and a nonzero exit code.
+* Help doesn't take into account any arguments the user has entered. Ideally you'd get contextual information like an identification of which args the user has supplied at the point where the parse failed or help was requested.
+* I don't handle very many types, and in particular a real arg parser would handle DUs and records with nesting.
+* I don't try very hard to find a valid parse. It may well be possible to find a case where I fail to parse despite there existing a valid parse.
+* There's no subcommand support (you'll have to do that yourself).
+
+It should work fine if you just want to compose a few primitive types, though.
+
 ## `RemoveOptions`
 
 Takes a record like this:

WoofWare.Myriad.Plugins.Attributes/ArgParserAttributes.fs

@@ -0,0 +1,63 @@
+namespace WoofWare.Myriad.Plugins
+
+open System
+
+/// Attribute indicating a record type to which the "build arg parser" Myriad
+/// generator should apply during build.
+///
+/// If you supply isExtensionMethod = true, you will get extension methods.
+/// These can only be consumed from F#, but the benefit is that they don't use up the module name
+/// (since by default we create a module called "{TypeName}").
+type ArgParserAttribute (isExtensionMethod : bool) =
+    inherit Attribute ()
+
+    /// The default value of `isExtensionMethod`, the optional argument to the ArgParserAttribute constructor.
+    static member DefaultIsExtensionMethod = false
+
+    /// Shorthand for the "isExtensionMethod = false" constructor; see documentation there for details.
+    new () = ArgParserAttribute ArgParserAttribute.DefaultIsExtensionMethod
+
+/// Attribute indicating that this field shall accumulate all unmatched args,
+/// as well as any that appear after a bare `--`.
+type PositionalArgsAttribute () =
+    inherit Attribute ()
+
+/// Attribute indicating that this field shall have a default value derived
+/// from calling an appropriately named static method on the type.
+///
+/// This attribute can only be placed on fields of type `Choice<_, _>` where both type parameters
+/// are the same.
+/// After a successful parse, the value is Choice1Of2 if the user supplied an input,
+/// or Choice2Of2 if the input was obtained by calling the default function.
+///
+/// The static method we call for field `FieldName : 'a` is `DefaultFieldName : unit -> 'a`.
+type ArgumentDefaultFunctionAttribute () =
+    inherit Attribute ()
+
+/// Attribute indicating that this field shall have a default value derived
+/// from an environment variable (whose name you give in the attribute constructor).
+///
+/// This attribute can only be placed on fields of type `Choice<_, _>` where both type parameters
+/// are the same.
+/// After a successful parse, the value is Choice1Of2 if the user supplied an input,
+/// or Choice2Of2 if the input was obtained by pulling a value from `Environment.GetEnvironmentVariable`.
+type ArgumentDefaultEnvironmentVariableAttribute (envVar : string) =
+    inherit Attribute ()
+
+/// Attribute indicating that this field shall have the given help text, when `--help` is invoked
+/// or when a parse error causes us to print help text.
+type ArgumentHelpTextAttribute (helpText : string) =
+    inherit Attribute ()
+
+/// Attribute indicating that this field should be parsed with a ParseExact method on its type.
+/// For example, on a TimeSpan field, with [<ArgumentParseExact @"hh\:mm\:ss">], we will call
+/// `TimeSpan.ParseExact (s, @"hh\:mm\:ss", CultureInfo.CurrentCulture).
+type ParseExactAttribute (format : string) =
+    inherit Attribute ()
+
+/// Attribute indicating that this field should be parsed in the invariant culture, rather than the
+/// default current culture.
+/// For example, on a TimeSpan field, with [<InvariantCulture>] and [<ArgumentParseExact @"hh\:mm\:ss">], we will call
+/// `TimeSpan.ParseExact (s, @"hh\:mm\:ss", CultureInfo.InvariantCulture).
+type InvariantCultureAttribute () =
+    inherit Attribute ()

WoofWare.Myriad.Plugins.Attributes/SurfaceBaseline.txt

@@ -1,3 +1,14 @@
+WoofWare.Myriad.Plugins.ArgParserAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.ArgParserAttribute..ctor [constructor]: bool
+WoofWare.Myriad.Plugins.ArgParserAttribute..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.ArgParserAttribute.DefaultIsExtensionMethod [static property]: [read-only] bool
+WoofWare.Myriad.Plugins.ArgParserAttribute.get_DefaultIsExtensionMethod [static method]: unit -> bool
+WoofWare.Myriad.Plugins.ArgumentDefaultEnvironmentVariableAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.ArgumentDefaultEnvironmentVariableAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.ArgumentDefaultFunctionAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.ArgumentDefaultFunctionAttribute..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.ArgumentHelpTextAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.ArgumentHelpTextAttribute..ctor [constructor]: string
 WoofWare.Myriad.Plugins.CreateCatamorphismAttribute inherit System.Attribute
 WoofWare.Myriad.Plugins.CreateCatamorphismAttribute..ctor [constructor]: string
 WoofWare.Myriad.Plugins.GenerateMockAttribute inherit System.Attribute
@@ -10,6 +21,8 @@ WoofWare.Myriad.Plugins.HttpClientAttribute..ctor [constructor]: bool
 WoofWare.Myriad.Plugins.HttpClientAttribute..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.HttpClientAttribute.DefaultIsExtensionMethod [static property]: [read-only] bool
 WoofWare.Myriad.Plugins.HttpClientAttribute.get_DefaultIsExtensionMethod [static method]: unit -> bool
+WoofWare.Myriad.Plugins.InvariantCultureAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.InvariantCultureAttribute..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.JsonParseAttribute inherit System.Attribute
 WoofWare.Myriad.Plugins.JsonParseAttribute..ctor [constructor]: bool
 WoofWare.Myriad.Plugins.JsonParseAttribute..ctor [constructor]: unit
@@ -20,6 +33,10 @@ WoofWare.Myriad.Plugins.JsonSerializeAttribute..ctor [constructor]: bool
 WoofWare.Myriad.Plugins.JsonSerializeAttribute..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.JsonSerializeAttribute.DefaultIsExtensionMethod [static property]: [read-only] bool
 WoofWare.Myriad.Plugins.JsonSerializeAttribute.get_DefaultIsExtensionMethod [static method]: unit -> bool
+WoofWare.Myriad.Plugins.ParseExactAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.ParseExactAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.PositionalArgsAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.PositionalArgsAttribute..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.RemoveOptionsAttribute inherit System.Attribute
 WoofWare.Myriad.Plugins.RemoveOptionsAttribute..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.RestEase inherit obj

WoofWare.Myriad.Plugins.Attributes/Test/WoofWare.Myriad.Plugins.Attributes.Test.fsproj

@@ -12,10 +12,10 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="ApiSurface" Version="4.0.43" />
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0"/>
-        <PackageReference Include="NUnit" Version="4.1.0"/>
-        <PackageReference Include="NUnit3TestAdapter" Version="4.5.0"/>
+        <PackageReference Include="ApiSurface" Version="4.1.5" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.0"/>
+        <PackageReference Include="NUnit" Version="4.2.2"/>
+        <PackageReference Include="NUnit3TestAdapter" Version="4.6.0"/>
     </ItemGroup>
 
     <ItemGroup>

WoofWare.Myriad.Plugins.Attributes/WoofWare.Myriad.Plugins.Attributes.fsproj

@@ -19,6 +19,7 @@
 
   <ItemGroup>
     <Compile Include="Attributes.fs"/>
+    <Compile Include="ArgParserAttributes.fs" />
     <Compile Include="RestEase.fs" />
     <EmbeddedResource Include="version.json"/>
     <EmbeddedResource Include="SurfaceBaseline.txt"/>

WoofWare.Myriad.Plugins.Attributes/version.json

@@ -1,5 +1,5 @@
 {
-  "version": "3.1",
+  "version": "3.2",
   "publicReleaseRefSpec": [
     "^refs/heads/main$"
   ],
@@ -10,6 +10,6 @@
     ":/Directory.Build.props",
     ":/global.json",
     "./",
-    "^./Test"
+    ":^Test"
   ]
 }

WoofWare.Myriad.Plugins.Test/TestArgParser/TestArgParser.fs

@@ -0,0 +1,423 @@
+namespace WoofWare.Myriad.Plugins.Test
+
+open System
+open System.Threading
+open NUnit.Framework
+open FsUnitTyped
+open ConsumePlugin
+open FsCheck
+
+[<TestFixture>]
+module TestArgParser =
+
+    [<TestCase true>]
+    [<TestCase false>]
+    let ``Positionals get parsed: they don't have to be strings`` (sep : bool) =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        let property
+            (fooSep : bool)
+            (barSep : bool)
+            (bazSep : bool)
+            (pos0 : int list)
+            (pos1 : int list)
+            (pos2 : int list)
+            (pos3 : int list)
+            (pos4 : int list)
+            =
+            let args =
+                [
+                    yield! pos0 |> List.map string<int>
+                    if fooSep then
+                        yield "--foo=3"
+                    else
+                        yield "--foo"
+                        yield "3"
+                    yield! pos1 |> List.map string<int>
+                    if barSep then
+                        yield "--bar=4"
+                    else
+                        yield "--bar"
+                        yield "4"
+                    yield! pos2 |> List.map string<int>
+                    if bazSep then
+                        yield "--baz=true"
+                    else
+                        yield "--baz"
+                        yield "true"
+                    yield! pos3 |> List.map string<int>
+                    if sep then
+                        yield "--"
+                    yield! pos4 |> List.map string<int>
+                ]
+
+            BasicWithIntPositionals.parse' getEnvVar args
+            |> shouldEqual
+                {
+                    Foo = 3
+                    Bar = "4"
+                    Baz = true
+                    Rest = pos0 @ pos1 @ pos2 @ pos3 @ pos4
+                }
+
+        Check.QuickThrowOnFailure property
+
+    [<Test>]
+    let ``Arg-like thing appearing before double dash`` () =
+        let envCalls = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment envCalls |> ignore<int>
+            ""
+
+        let args = [ "--foo=3" ; "--non-existent" ; "--bar=4" ; "--baz=true" ]
+
+        let exc =
+            Assert.Throws<exn> (fun () -> Basic.parse' getEnvVar args |> ignore<Basic>)
+
+        envCalls.Value |> shouldEqual 0
+
+        exc.Message
+        |> shouldEqual
+            """Unable to process supplied arg --non-existent. Help text follows.
+--foo  int32 : This is a foo!
+--bar  string
+--baz  bool
+--rest  string (positional args) (can be repeated) : Here's where the rest of the args go"""
+
+    [<Test>]
+    let ``Can supply positional args with key`` () =
+        let envCalls = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment envCalls |> ignore<int>
+            ""
+
+        let property (args : (int * bool) list) (afterDoubleDash : int list option) =
+            let flatArgs =
+                args
+                |> List.collect (fun (value, sep) ->
+                    if sep then
+                        [ $"--rest=%i{value}" ]
+                    else
+                        [ "--rest" ; string<int> value ]
+                )
+                |> fun l -> l @ [ "--foo=3" ; "--bar=4" ; "--baz=true" ]
+
+            let flatArgs, expected =
+                match afterDoubleDash with
+                | None -> flatArgs, List.map fst args
+                | Some rest -> flatArgs @ [ "--" ] @ (List.map string<int> rest), List.map fst args @ rest
+
+            BasicWithIntPositionals.parse' getEnvVar flatArgs
+            |> shouldEqual
+                {
+                    Foo = 3
+                    Bar = "4"
+                    Baz = true
+                    Rest = expected
+                }
+
+        Check.QuickThrowOnFailure property
+        envCalls.Value |> shouldEqual 0
+
+    [<Test>]
+    let ``Consume multiple occurrences of required arg`` () =
+        let envCalls = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment envCalls |> ignore<int>
+            ""
+
+        let args = [ "--foo=3" ; "--rest" ; "7" ; "--bar=4" ; "--baz=true" ; "--rest=8" ]
+
+        let result = BasicNoPositionals.parse' getEnvVar args
+
+        envCalls.Value |> shouldEqual 0
+
+        result
+        |> shouldEqual
+            {
+                Foo = 3
+                Bar = "4"
+                Baz = true
+                Rest = [ 7 ; 8 ]
+            }
+
+    [<Test>]
+    let ``Gracefully handle invalid multiple occurrences of required arg`` () =
+        let envCalls = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment envCalls |> ignore<int>
+            ""
+
+        let args = [ "--foo=3" ; "--foo" ; "9" ; "--bar=4" ; "--baz=true" ; "--baz=false" ]
+
+        let exc =
+            Assert.Throws<exn> (fun () -> Basic.parse' getEnvVar args |> ignore<Basic>)
+
+        envCalls.Value |> shouldEqual 0
+
+        exc.Message
+        |> shouldEqual
+            """Errors during parse!
+Argument '--foo' was supplied multiple times: 3 and 9
+Argument '--baz' was supplied multiple times: True and false"""
+
+    [<Test>]
+    let ``Args appearing after double dash are positional`` () =
+        let envCalls = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment envCalls |> ignore<int>
+            ""
+
+        let args = [ "--" ; "--foo=3" ; "--bar=4" ; "--baz=true" ]
+
+        let exc =
+            Assert.Throws<exn> (fun () -> Basic.parse' getEnvVar args |> ignore<Basic>)
+
+        exc.Message
+        |> shouldEqual
+            """Errors during parse!
+Required argument '--foo' received no value
+Required argument '--bar' received no value
+Required argument '--baz' received no value"""
+
+        envCalls.Value |> shouldEqual 0
+
+    [<Test>]
+    let ``Help text`` () =
+        let getEnvVar (s : string) =
+            s |> shouldEqual "CONSUMEPLUGIN_THINGS"
+            "hi!"
+
+        let exc =
+            Assert.Throws<exn> (fun () -> Basic.parse' getEnvVar [ "--help" ] |> ignore<Basic>)
+
+        exc.Message
+        |> shouldEqual
+            """Help text requested.
+--foo  int32 : This is a foo!
+--bar  string
+--baz  bool
+--rest  string (positional args) (can be repeated) : Here's where the rest of the args go"""
+
+    [<Test>]
+    let ``Help text, with default values`` () =
+        let envVars = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment envVars |> ignore<int>
+            ""
+
+        let exc =
+            Assert.Throws<exn> (fun () -> LoadsOfTypes.parse' getEnvVar [ "--help" ] |> ignore<LoadsOfTypes>)
+
+        exc.Message
+        |> shouldEqual
+            """Help text requested.
+--foo  int32
+--bar  string
+--baz  bool
+--some-file  FileInfo
+--some-directory  DirectoryInfo
+--some-list  DirectoryInfo (can be repeated)
+--optional-thing-with-no-default  int32 (optional)
+--optional-thing  bool (default value: True)
+--another-optional-thing  int32 (default value: 3)
+--yet-another-optional-thing  string (default value populated from env var CONSUMEPLUGIN_THINGS)
+--positionals  int32 (positional args) (can be repeated)"""
+
+        envVars.Value |> shouldEqual 0
+
+    [<Test>]
+    let ``Default values`` () =
+        let getEnvVar (s : string) =
+            s |> shouldEqual "CONSUMEPLUGIN_THINGS"
+            "hi!"
+
+        let args =
+            [
+                "--foo"
+                "3"
+                "--bar=some string"
+                "--baz"
+                "--some-file=/path/to/file"
+                "--some-directory"
+                "/a/dir"
+                "--another-optional-thing"
+                "3000"
+            ]
+
+        let result = LoadsOfTypes.parse' getEnvVar args
+
+        result.OptionalThing |> shouldEqual (Choice2Of2 true)
+        result.OptionalThingWithNoDefault |> shouldEqual None
+        result.AnotherOptionalThing |> shouldEqual (Choice1Of2 3000)
+        result.YetAnotherOptionalThing |> shouldEqual (Choice2Of2 "hi!")
+
+    [<Test>]
+    let ``ParseExact and help`` () =
+        let count = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment count |> ignore<int>
+            ""
+
+        let exc =
+            Assert.Throws<exn> (fun () -> DatesAndTimes.parse' getEnvVar [ "--help" ] |> ignore<DatesAndTimes>)
+
+        exc.Message
+        |> shouldEqual
+            @"Help text requested.
+--plain  TimeSpan
+--invariant  TimeSpan
+--exact  TimeSpan : An exact time please [Parse format (.NET): hh\:mm\:ss]
+--invariant-exact  TimeSpan : [Parse format (.NET): hh\:mm\:ss]"
+
+        count.Value |> shouldEqual 0
+
+    [<Test>]
+    let rec ``TimeSpans and their attributes`` () =
+        let count = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment count |> ignore<int>
+            ""
+
+        let parsed =
+            DatesAndTimes.parse'
+                getEnvVar
+                [
+                    "--exact=11:34:00"
+                    "--plain=1"
+                    "--invariant=23:59"
+                    "--invariant-exact=23:59:00"
+                ]
+
+        parsed.Plain |> shouldEqual (TimeSpan (1, 0, 0, 0))
+        parsed.Invariant |> shouldEqual (TimeSpan (23, 59, 00))
+        parsed.Exact |> shouldEqual (TimeSpan (11, 34, 00))
+        parsed.InvariantExact |> shouldEqual (TimeSpan (23, 59, 00))
+
+        let exc =
+            Assert.Throws<exn> (fun () ->
+                DatesAndTimes.parse'
+                    getEnvVar
+                    [
+                        "--exact=11:34:00"
+                        "--plain=1"
+                        "--invariant=23:59"
+                        "--invariant-exact=23:59"
+                    ]
+                |> ignore<DatesAndTimes>
+            )
+
+        exc.Message
+        |> shouldEqual
+            """Errors during parse!
+Input string was not in a correct format. (at arg --invariant-exact=23:59)
+Required argument '--invariant-exact' received no value"""
+
+        let exc =
+            Assert.Throws<exn> (fun () ->
+                DatesAndTimes.parse'
+                    getEnvVar
+                    [
+                        "--exact=11:34"
+                        "--plain=1"
+                        "--invariant=23:59"
+                        "--invariant-exact=23:59:00"
+                    ]
+                |> ignore<DatesAndTimes>
+            )
+
+        exc.Message
+        |> shouldEqual
+            """Errors during parse!
+Input string was not in a correct format. (at arg --exact=11:34)
+Required argument '--exact' received no value"""
+
+        count.Value |> shouldEqual 0
+
+    [<Test>]
+    let ``Can consume stacked record without positionals`` () =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        let parsed =
+            ParentRecord.parse' getEnvVar [ "--and-another=true" ; "--thing1=9" ; "--thing2=a thing!" ]
+
+        parsed
+        |> shouldEqual
+            {
+                Child =
+                    {
+                        Thing1 = 9
+                        Thing2 = "a thing!"
+                    }
+                AndAnother = true
+            }
+
+    [<Test>]
+    let ``Can consume stacked record, child has positionals`` () =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        let parsed =
+            ParentRecordChildPos.parse'
+                getEnvVar
+                [ "--and-another=true" ; "--thing1=9" ; "--thing2=some" ; "--thing2=thing" ]
+
+        parsed
+        |> shouldEqual
+            {
+                Child =
+                    {
+                        Thing1 = 9
+                        Thing2 = [ "some" ; "thing" ]
+                    }
+                AndAnother = true
+            }
+
+    [<Test>]
+    let ``Can consume stacked record, child has no positionals, parent has positionals`` () =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        let parsed =
+            ParentRecordSelfPos.parse'
+                getEnvVar
+                [
+                    "--and-another=true"
+                    "--and-another=false"
+                    "--and-another=true"
+                    "--thing1=9"
+                    "--thing2=some"
+                ]
+
+        parsed
+        |> shouldEqual
+            {
+                Child =
+                    {
+                        Thing1 = 9
+                        Thing2 = "some"
+                    }
+                AndAnother = [ true ; false ; true ]
+            }
+
+    [<Test>]
+    let ``Help text for stacked records`` () =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        let exc =
+            Assert.Throws<exn> (fun () ->
+                ParentRecordSelfPos.parse' getEnvVar [ "--help" ] |> ignore<ParentRecordSelfPos>
+            )
+
+        exc.Message
+        |> shouldEqual
+            """Help text requested.
+--thing1  int32
+--thing2  string
+--and-another  bool (positional args) (can be repeated)"""

WoofWare.Myriad.Plugins.Test/TestCataGenerator/TestGift.fs

@@ -43,7 +43,7 @@ module TestGift =
                     member _.WithACard g message =
                         $"%s{g} with a card saying '%s{message}'"
 
-                    member _.Wrapped g paper = $"%s{g} wrapped in %A{paper} paper"
+                    member _.Wrapped g paper = $"%s{g} wrapped in %O{paper} paper"
                 }
         }
 

WoofWare.Myriad.Plugins.Test/WoofWare.Myriad.Plugins.Test.fsproj

@@ -27,18 +27,19 @@
     <Compile Include="TestCataGenerator\TestGift.fs" />
     <Compile Include="TestCataGenerator\TestMyList.fs" />
     <Compile Include="TestCataGenerator\TestMyList2.fs" />
+    <Compile Include="TestArgParser\TestArgParser.fs" />
     <Compile Include="TestRemoveOptions.fs"/>
     <Compile Include="TestSurface.fs"/>
     <None Include="../.github/workflows/dotnet.yaml" />
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="ApiSurface" Version="4.0.43"/>
+    <PackageReference Include="ApiSurface" Version="4.1.5"/>
     <PackageReference Include="FsCheck" Version="2.16.6"/>
     <PackageReference Include="FsUnit" Version="6.0.0"/>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0"/>
-    <PackageReference Include="NUnit" Version="4.1.0"/>
-    <PackageReference Include="NUnit3TestAdapter" Version="4.5.0"/>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.0"/>
+    <PackageReference Include="NUnit" Version="4.2.2"/>
+    <PackageReference Include="NUnit3TestAdapter" Version="4.6.0"/>
   </ItemGroup>
 
   <ItemGroup>

WoofWare.Myriad.Plugins/AstHelper.fs

@@ -62,13 +62,46 @@ type internal InterfaceType =
 type internal RecordType =
     {
         Name : Ident
-        Fields : SynField seq
+        Fields : SynField list
+        /// Any additional members which are not record fields.
         Members : SynMemberDefns option
         XmlDoc : PreXmlDoc option
         Generics : SynTyparDecls option
         Accessibility : SynAccess option
+        Attributes : SynAttribute list
     }
 
+    /// Parse from the AST.
+    static member OfRecord (record : SynTypeDefn) : RecordType =
+        let sci, sdr, smd, smdo =
+            match record with
+            | SynTypeDefn.SynTypeDefn (sci, sdr, smd, smdo, _, _) -> sci, sdr, smd, smdo
+
+        let synAccessOption, recordFields =
+            match sdr with
+            | SynTypeDefnRepr.Simple (SynTypeDefnSimpleRepr.Record (sa, fields, _), _) -> sa, fields
+            | _ -> failwith $"expected a record; got: %+A{record}"
+
+        match sci with
+        | SynComponentInfo.SynComponentInfo (attrs, typars, _, longId, doc, _, access, _) ->
+            if access <> synAccessOption then
+                failwith
+                    $"TODO what's happened, two different accessibility modifiers: %O{access} and %O{synAccessOption}"
+
+            match smdo with
+            | Some v -> failwith $"TODO what's happened, got a synMemberDefn of %O{v}"
+            | None -> ()
+
+            {
+                Name = List.last longId
+                Fields = recordFields
+                Members = if smd.IsEmpty then None else Some smd
+                XmlDoc = if doc.IsEmpty then None else Some doc
+                Generics = typars
+                Accessibility = synAccessOption
+                Attributes = attrs |> List.collect (fun l -> l.Attributes)
+            }
+
 /// Anything that is part of an ADT.
 /// A record is a product of stuff; this type represents one of those stuffs.
 type internal AdtNode =
@@ -101,10 +134,10 @@ module internal AstHelper =
         | SynTypeDefnRepr.Simple (SynTypeDefnSimpleRepr.Enum _, _) -> true
         | _ -> false
 
-    let instantiateRecord (fields : (RecordFieldName * SynExpr option) list) : SynExpr =
+    let instantiateRecord (fields : (SynLongIdent * SynExpr) list) : SynExpr =
         let fields =
             fields
-            |> List.map (fun (rfn, synExpr) -> SynExprRecordField (rfn, Some range0, synExpr, None))
+            |> List.map (fun (rfn, synExpr) -> SynExprRecordField ((rfn, true), Some range0, Some synExpr, None))
 
         SynExpr.Record (None, None, fields, range0)
 

WoofWare.Myriad.Plugins/CataGenerator.fs

@@ -858,7 +858,7 @@ module internal CataGenerator =
 
         SynExpr.createMatch (SynExpr.createIdent "x") matchCases
         |> SynMatchClause.create (
-            SynPat.identWithArgs analysis.AssociatedProcessInstruction (SynArgPats.create [ Ident.create "x" ])
+            SynPat.identWithArgs analysis.AssociatedProcessInstruction (SynArgPats.createNamed [ "x" ])
         )
 
     /// Create the state-machine matches which deal with receiving the instruction
@@ -896,8 +896,8 @@ module internal CataGenerator =
                     |> Seq.mapi (fun i x -> (i, x))
                     |> Seq.choose (fun (i, case) ->
                         match case.Description with
-                        | FieldDescription.NonRecursive _ -> case.ArgName |> Some
-                        | FieldDescription.ListSelf _ -> case.ArgName |> Some
+                        | FieldDescription.NonRecursive _ -> case.ArgName |> SynPat.namedI |> Some
+                        | FieldDescription.ListSelf _ -> case.ArgName |> SynPat.namedI |> Some
                         | FieldDescription.Self _ -> None
                     )
                     |> Seq.toList
@@ -1100,7 +1100,7 @@ module internal CataGenerator =
         let moduleName = parentName + "Cata" |> Ident.create
 
         let modInfo =
-            SynComponentInfo.create (parentName + "Cata" |> Ident.create)
+            SynComponentInfo.create moduleName
             |> SynComponentInfo.withDocString (
                 PreXmlDoc.Create $" Methods to perform a catamorphism over the type %s{parentName}"
             )

WoofWare.Myriad.Plugins/HttpClientGenerator.fs

@@ -257,11 +257,7 @@ module internal HttpClientGenerator =
                     | Some id -> id
 
                 let urlSeparator =
-                    // apparent Myriad bug: `IndexOf '?'` gets formatted as `IndexOf ?` which is clearly wrong
-                    let questionMark =
-                        SynExpr.CreateConst 63
-                        |> SynExpr.applyFunction (SynExpr.createIdent "char")
-                        |> SynExpr.paren
+                    let questionMark = SynExpr.CreateConst '?'
 
                     let containsQuestion =
                         info.UrlTemplate
@@ -425,21 +421,17 @@ module internal HttpClientGenerator =
                                 (SynExpr.createIdent' bodyParamName)
                         )
                         Do (
-                            SynExpr.LongIdentSet (
-                                SynLongIdent.createS' [ "httpMessage" ; "Content" ],
-                                SynExpr.createIdent "queryParams",
-                                range0
-                            )
+                            SynExpr.assign
+                                (SynLongIdent.createS' [ "httpMessage" ; "Content" ])
+                                (SynExpr.createIdent "queryParams")
                         )
                     ]
                 | BodyParamMethods.HttpContent ->
                     [
                         Do (
-                            SynExpr.LongIdentSet (
-                                SynLongIdent.createS' [ "httpMessage" ; "Content" ],
-                                SynExpr.createIdent' bodyParamName,
-                                range0
-                            )
+                            SynExpr.assign
+                                (SynLongIdent.createS' [ "httpMessage" ; "Content" ])
+                                (SynExpr.createIdent' bodyParamName)
                         )
                     ]
                 | BodyParamMethods.Serialise ty ->
@@ -464,11 +456,9 @@ module internal HttpClientGenerator =
                                  ))
                         )
                         Do (
-                            SynExpr.LongIdentSet (
-                                SynLongIdent.createS' [ "httpMessage" ; "Content" ],
-                                SynExpr.createIdent "queryParams",
-                                range0
-                            )
+                            SynExpr.assign
+                                (SynLongIdent.createS' [ "httpMessage" ; "Content" ])
+                                (SynExpr.createIdent "queryParams")
                         )
                     ]
 
@@ -695,7 +685,7 @@ module internal HttpClientGenerator =
                 let headerInfo =
                     match extractHeaderInformation pi.Attributes with
                     | [ [ x ] ] -> x
-                    | [ xs ] ->
+                    | [ _ ] ->
                         failwith
                             "Expected exactly one Header parameter on the member, with exactly one arg; got one Header parameter with non-1-many args"
                     | [] ->
@@ -843,7 +833,7 @@ module internal HttpClientGenerator =
                     |> SynTypeDefn.create componentInfo
                     |> SynTypeDefn.withMemberDefns [ binding ]
 
-                SynModuleDecl.Types ([ containingType ], range0)
+                SynModuleDecl.createTypes [ containingType ]
 
             else
                 SynBinding.basic [ Ident.create "make" ] (headerArgs @ [ clientCreationArg ]) interfaceImpl

WoofWare.Myriad.Plugins/InterfaceMockGenerator.fs

@@ -71,13 +71,13 @@ module internal InterfaceMockGenerator =
                 if inherits.Contains KnownInheritance.IDisposable then
                     let unitFun = SynExpr.createThunk (SynExpr.CreateConst ())
 
-                    [ (SynLongIdent.createS "Dispose", true), Some unitFun ]
+                    [ SynLongIdent.createS "Dispose", unitFun ]
                 else
                     []
 
             let nonExtras =
                 fields
-                |> List.map (fun field -> (SynLongIdent.createI (getName field), true), Some (failwithFun field))
+                |> List.map (fun field -> SynLongIdent.createI (getName field), failwithFun field)
 
             extras @ nonExtras
 
@@ -213,6 +213,7 @@ module internal InterfaceMockGenerator =
                 XmlDoc = Some xmlDoc
                 Generics = interfaceType.Generics
                 Accessibility = Some access
+                Attributes = []
             }
 
         let typeDecl = AstHelper.defineRecordType record

WoofWare.Myriad.Plugins/JsonParseGenerator.fs

@@ -407,9 +407,7 @@ module internal JsonParseGenerator =
 
         let finalConstruction =
             fields
-            |> List.mapi (fun i fieldData ->
-                (SynLongIdent.createI fieldData.Ident, true), Some (SynExpr.createIdent $"arg_%i{i}")
-            )
+            |> List.mapi (fun i fieldData -> SynLongIdent.createI fieldData.Ident, SynExpr.createIdent $"arg_%i{i}")
             |> AstHelper.instantiateRecord
 
         (finalConstruction, assignments)

WoofWare.Myriad.Plugins/JsonSerializeGenerator.fs

@@ -72,9 +72,7 @@ module internal JsonSerializeGenerator =
                     target
                     |> SynExpr.paren
                     |> SynExpr.upcast' (SynType.createLongIdent' [ "System" ; "Text" ; "Json" ; "Nodes" ; "JsonNode" ])
-                |> SynMatchClause.create (
-                    SynPat.identWithArgs [ Ident.create "Some" ] (SynArgPats.create [ Ident.create "field" ])
-                )
+                |> SynMatchClause.create (SynPat.nameWithArgs "Some" [ SynPat.named "field" ])
 
             [ noneClause ; someClause ]
             |> SynExpr.createMatch (SynExpr.createIdent "field")
@@ -125,11 +123,7 @@ module internal JsonSerializeGenerator =
                     DebugPointAtInOrTo.Yes range0,
                     SeqExprOnly.SeqExprOnly false,
                     true,
-                    SynPat.paren (
-                        SynPat.identWithArgs
-                            [ Ident.create "KeyValue" ]
-                            (SynArgPats.create [ Ident.create "key" ; Ident.create "value" ])
-                    ),
+                    SynPat.paren (SynPat.nameWithArgs "KeyValue" [ SynPat.named "key" ; SynPat.named "value" ]),
                     SynExpr.createIdent "field",
                     SynExpr.applyFunction
                         (SynExpr.createLongIdent [ "ret" ; "Add" ])
@@ -275,9 +269,9 @@ module internal JsonSerializeGenerator =
         |> List.map (fun unionCase ->
             let propertyName = getPropertyName unionCase.Ident unionCase.Attrs
 
-            let caseNames = unionCase.Fields |> List.mapi (fun i _ -> Ident.create $"arg%i{i}")
+            let caseNames = unionCase.Fields |> List.mapi (fun i _ -> $"arg%i{i}")
 
-            let argPats = SynArgPats.create caseNames
+            let argPats = SynArgPats.createNamed caseNames
 
             let pattern =
                 SynPat.LongIdent (
@@ -311,7 +305,7 @@ module internal JsonSerializeGenerator =
                     let propertyName = getPropertyName (Option.get fieldData.Ident) fieldData.Attrs
 
                     let node =
-                        SynExpr.applyFunction (fst (serializeNode fieldData.Type)) (SynExpr.createIdent' caseName)
+                        SynExpr.applyFunction (fst (serializeNode fieldData.Type)) (SynExpr.createIdent caseName)
 
                     [ propertyName ; node ]
                     |> SynExpr.tuple

WoofWare.Myriad.Plugins/RemoveOptionsGenerator.fs

@@ -42,6 +42,7 @@ module internal RemoveOptionsGenerator =
         (accessibility : SynAccess option)
         (generics : SynTyparDecls option)
         (fields : SynField list)
+        : SynModuleDecl
         =
         let fields : SynField list = fields |> List.map removeOption
         let name = Ident.create "Short"
@@ -54,6 +55,7 @@ module internal RemoveOptionsGenerator =
                 XmlDoc = xmlDoc
                 Generics = generics
                 Accessibility = accessibility
+                Attributes = []
             }
 
         let typeDecl = AstHelper.defineRecordType record
@@ -91,7 +93,7 @@ module internal RemoveOptionsGenerator =
                         )
                     | _ -> accessor
 
-                (SynLongIdent.createI fieldData.Ident, true), Some body
+                SynLongIdent.createI fieldData.Ident, body
             )
             |> AstHelper.instantiateRecord
 

WoofWare.Myriad.Plugins/SurfaceBaseline.txt

@@ -1,3 +1,5 @@
+WoofWare.Myriad.Plugins.ArgParserGenerator inherit obj, implements Myriad.Core.IMyriadGenerator
+WoofWare.Myriad.Plugins.ArgParserGenerator..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.CreateCatamorphismGenerator inherit obj, implements Myriad.Core.IMyriadGenerator
 WoofWare.Myriad.Plugins.CreateCatamorphismGenerator..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.HttpClientGenerator inherit obj, implements Myriad.Core.IMyriadGenerator

WoofWare.Myriad.Plugins/SynExpr/PreXmlDoc.fs

@@ -7,3 +7,6 @@ open Fantomas.FCS.Text.Range
 module internal PreXmlDoc =
     let create (s : string) : PreXmlDoc =
         PreXmlDoc.Create ([| " " + s |], range0)
+
+    let create' (s : string seq) : PreXmlDoc =
+        PreXmlDoc.Create (Array.ofSeq s, range0)

WoofWare.Myriad.Plugins/SynExpr/SynArgPats.fs

@@ -1,16 +1,30 @@
 namespace WoofWare.Myriad.Plugins
 
 open Fantomas.FCS.Syntax
+open Fantomas.FCS.Text.Range
 
 [<RequireQualifiedAccess>]
 module internal SynArgPats =
-    let create (caseNames : Ident list) : SynArgPats =
+    let createNamed (caseNames : string list) : SynArgPats =
         match caseNames.Length with
         | 0 -> SynArgPats.Pats []
-        | 1 -> [ SynPat.named caseNames.[0].idText ] |> SynArgPats.Pats
-        | _ ->
-            caseNames
-            |> List.map (fun i -> SynPat.named i.idText)
-            |> SynPat.tuple
+        | 1 ->
+            SynPat.Named (SynIdent.SynIdent (Ident.create caseNames.[0], None), false, None, range0)
+            |> List.singleton
+            |> SynArgPats.Pats
+        | len ->
+            caseNames
+            |> List.map (fun name -> SynPat.Named (SynIdent.SynIdent (Ident.create name, None), false, None, range0))
+            |> fun t -> SynPat.Tuple (false, t, List.replicate (len - 1) range0, range0)
+            |> fun t -> SynPat.Paren (t, range0)
+            |> List.singleton
+            |> SynArgPats.Pats
+
+    let create (pats : SynPat list) : SynArgPats =
+        match pats.Length with
+        | 0 -> SynArgPats.Pats []
+        | 1 -> [ pats.[0] ] |> SynArgPats.Pats
+        | len ->
+            SynPat.Paren (SynPat.Tuple (false, pats, List.replicate (len - 1) range0, range0), range0)
             |> List.singleton
             |> SynArgPats.Pats

WoofWare.Myriad.Plugins/SynExpr/SynAttributes.fs

@@ -0,0 +1,15 @@
+namespace WoofWare.Myriad.Plugins
+
+open Fantomas.FCS.Syntax
+open Fantomas.FCS.Text.Range
+
+[<RequireQualifiedAccess>]
+module internal SynAttributes =
+    let ofAttrs (attrs : SynAttribute list) : SynAttributes =
+        attrs
+        |> List.map (fun a ->
+            {
+                Attributes = [ a ]
+                Range = range0
+            }
+        )

WoofWare.Myriad.Plugins/SynExpr/SynBinding.fs

@@ -62,6 +62,35 @@ module internal SynBinding =
             triviaZero false
         )
 
+    let withMutability (mut : bool) (binding : SynBinding) : SynBinding =
+        match binding with
+        | SynBinding (pat, kind, inl, _, attrs, xml, valData, headPat, returnInfo, expr, range, debugPoint, trivia) ->
+            SynBinding (pat, kind, inl, mut, attrs, xml, valData, headPat, returnInfo, expr, range, debugPoint, trivia)
+
+    let withRecursion (isRec : bool) (binding : SynBinding) : SynBinding =
+        match binding with
+        | SynBinding (pat, kind, inl, mut, attrs, xml, valData, headPat, returnInfo, expr, range, debugPoint, trivia) ->
+            let trivia =
+                { trivia with
+                    LeadingKeyword =
+                        match trivia.LeadingKeyword with
+                        | SynLeadingKeyword.Let _ ->
+                            if isRec then
+                                SynLeadingKeyword.LetRec (range0, range0)
+                            else
+                                trivia.LeadingKeyword
+                        | SynLeadingKeyword.LetRec _ ->
+                            if isRec then
+                                trivia.LeadingKeyword
+                            else
+                                trivia.LeadingKeyword
+                        | existing ->
+                            failwith
+                                $"WoofWare.Myriad doesn't yet let you adjust the recursion modifier on a binding with modifier %O{existing}"
+                }
+
+            SynBinding (pat, kind, inl, mut, attrs, xml, valData, headPat, returnInfo, expr, range, debugPoint, trivia)
+
     let withAccessibility (acc : SynAccess option) (binding : SynBinding) : SynBinding =
         match binding with
         | SynBinding (_, kind, inl, mut, attrs, xml, valData, headPat, returnInfo, expr, range, debugPoint, trivia) ->

WoofWare.Myriad.Plugins/SynExpr/SynExpr.fs

@@ -13,6 +13,13 @@ module internal SynExprExtensions =
 
         static member CreateConst () : SynExpr = SynExpr.Const (SynConst.Unit, range0)
 
+        static member CreateConst (b : bool) : SynExpr = SynExpr.Const (SynConst.Bool b, range0)
+
+        static member CreateConst (c : char) : SynExpr =
+            // apparent Myriad bug: `IndexOf '?'` gets formatted as `IndexOf ?` which is clearly wrong
+            SynExpr.CreateApp (SynExpr.Ident (Ident.Create "char"), SynExpr.CreateConst (int c))
+            |> fun e -> SynExpr.Paren (e, range0, Some range0, range0)
+
         static member CreateConst (i : int32) : SynExpr =
             SynExpr.Const (SynConst.Int32 i, range0)
 
@@ -138,6 +145,14 @@ module internal SynExpr =
     let inline index (property : SynExpr) (obj : SynExpr) : SynExpr =
         SynExpr.DotIndexedGet (obj, property, range0, range0)
 
+    let inline arrayIndexRange (start : SynExpr option) (endRange : SynExpr option) (arr : SynExpr) : SynExpr =
+        SynExpr.DotIndexedGet (
+            arr,
+            (SynExpr.IndexRange (start, range0, endRange, range0, range0, range0)),
+            range0,
+            range0
+        )
+
     let inline paren (e : SynExpr) : SynExpr =
         SynExpr.Paren (e, range0, Some range0, range0)
 
@@ -202,6 +217,18 @@ module internal SynExpr =
 
         pipeThroughFunction lambda body
 
+    let inline createForEach (pat : SynPat) (enumExpr : SynExpr) (body : SynExpr) : SynExpr =
+        SynExpr.ForEach (
+            DebugPointAtFor.No,
+            DebugPointAtInOrTo.No,
+            SeqExprOnly.SeqExprOnly false,
+            true,
+            pat,
+            enumExpr,
+            body,
+            range0
+        )
+
     let inline createLet (bindings : SynBinding list) (body : SynExpr) : SynExpr =
         SynExpr.LetOrUse (false, false, bindings, body, range0, SynExprLetOrUseTrivia.empty)
 
@@ -233,6 +260,12 @@ module internal SynExpr =
         exprs
         |> List.reduce (fun a b -> SynExpr.Sequential (DebugPointAtSequential.SuppressNeither, false, a, b, range0))
 
+    let listLiteral (elts : SynExpr list) : SynExpr =
+        SynExpr.ArrayOrListComputed (false, sequential elts, range0)
+
+    let arrayLiteral (elts : SynExpr list) : SynExpr =
+        SynExpr.ArrayOrListComputed (true, sequential elts, range0)
+
     /// {compExpr} { {lets} ; return {ret} }
     let createCompExpr (compExpr : string) (retBody : SynExpr) (lets : CompExprBinding list) : SynExpr =
         let retStatement = SynExpr.YieldOrReturn ((false, true), retBody, range0)
@@ -296,9 +329,37 @@ module internal SynExpr =
 
     /// {y} > {x}
     let greaterThan (x : SynExpr) (y : SynExpr) : SynExpr =
-        SynExpr.CreateAppInfix (SynExpr.CreateLongIdent SynLongIdent.ge, y) |> applyTo x
+        SynExpr.CreateAppInfix (SynExpr.CreateLongIdent SynLongIdent.gt, y) |> applyTo x
+
+    /// {y} < {x}
+    let lessThan (x : SynExpr) (y : SynExpr) : SynExpr =
+        SynExpr.CreateAppInfix (SynExpr.CreateLongIdent SynLongIdent.lt, y) |> applyTo x
 
     /// {y} >= {x}
     let greaterThanOrEqual (x : SynExpr) (y : SynExpr) : SynExpr =
         SynExpr.CreateAppInfix (SynExpr.CreateLongIdent SynLongIdent.geq, y)
         |> applyTo x
+
+    /// {y} <= {x}
+    let lessThanOrEqual (x : SynExpr) (y : SynExpr) : SynExpr =
+        SynExpr.CreateAppInfix (SynExpr.CreateLongIdent SynLongIdent.leq, y)
+        |> applyTo x
+
+    /// {x} :: {y}
+    let listCons (x : SynExpr) (y : SynExpr) : SynExpr =
+        SynExpr.CreateAppInfix (
+            SynExpr.LongIdent (
+                false,
+                SynLongIdent.SynLongIdent (
+                    [ Ident.create "op_ColonColon" ],
+                    [],
+                    [ Some (IdentTrivia.OriginalNotation "::") ]
+                ),
+                None,
+                range0
+            ),
+            tupleNoParen [ x ; y ]
+        )
+        |> paren
+
+    let assign (lhs : SynLongIdent) (rhs : SynExpr) : SynExpr = SynExpr.LongIdentSet (lhs, rhs, range0)

WoofWare.Myriad.Plugins/SynExpr/SynLongIdent.fs

@@ -14,9 +14,19 @@ module internal SynLongIdent =
             [ Some (IdentTrivia.OriginalNotation ">=") ]
         )
 
-    let ge =
+    let leq =
+        SynLongIdent.SynLongIdent (
+            [ Ident.create "op_LessThanOrEqual" ],
+            [],
+            [ Some (IdentTrivia.OriginalNotation "<=") ]
+        )
+
+    let gt =
         SynLongIdent.SynLongIdent ([ Ident.create "op_GreaterThan" ], [], [ Some (IdentTrivia.OriginalNotation ">") ])
 
+    let lt =
+        SynLongIdent.SynLongIdent ([ Ident.create "op_LessThan" ], [], [ Some (IdentTrivia.OriginalNotation "<") ])
+
     let sub =
         SynLongIdent.SynLongIdent ([ Ident.create "op_Subtraction" ], [], [ Some (IdentTrivia.OriginalNotation "-") ])
 
@@ -70,6 +80,12 @@ module internal SynLongIdent =
         // TODO: consider Microsoft.FSharp.Option or whatever it is
         | _ -> false
 
+    let isChoice (ident : SynLongIdent) : bool =
+        match ident.LongIdent with
+        | [ i ] when System.String.Equals (i.idText, "Choice", System.StringComparison.Ordinal) -> true
+        // TODO: consider Microsoft.FSharp.Choice or whatever it is
+        | _ -> false
+
     let isNullable (ident : SynLongIdent) : bool =
         match ident.LongIdent |> List.map _.idText with
         | [ "System" ; "Nullable" ]

WoofWare.Myriad.Plugins/SynExpr/SynModuleDecl.fs

@@ -14,6 +14,8 @@ module internal SynModuleDecl =
 
     let inline createLet (binding : SynBinding) : SynModuleDecl = createLets [ binding ]
 
+    let inline createTypes (tys : SynTypeDefn list) : SynModuleDecl = SynModuleDecl.Types (tys, range0)
+
     let nestedModule (info : SynComponentInfo) (decls : SynModuleDecl list) : SynModuleDecl =
         SynModuleDecl.NestedModule (
             info,

WoofWare.Myriad.Plugins/SynExpr/SynPat.fs

@@ -7,6 +7,8 @@ open Fantomas.FCS.Text.Range
 module internal SynPat =
     let inline paren (pat : SynPat) : SynPat = SynPat.Paren (pat, range0)
 
+    let anon : SynPat = SynPat.Wild range0
+
     let inline annotateTypeNoParen (ty : SynType) (pat : SynPat) = SynPat.Typed (pat, ty, range0)
 
     let inline annotateType (ty : SynType) (pat : SynPat) = paren (annotateTypeNoParen ty pat)
@@ -20,6 +22,9 @@ module internal SynPat =
     let inline identWithArgs (i : LongIdent) (args : SynArgPats) : SynPat =
         SynPat.LongIdent (SynLongIdent.create i, None, None, args, None, range0)
 
+    let inline nameWithArgs (i : string) (args : SynPat list) : SynPat =
+        identWithArgs [ Ident.create i ] (SynArgPats.create args)
+
     let inline tupleNoParen (elements : SynPat list) : SynPat =
         match elements with
         | [] -> failwith "Can't tuple no elements in a pattern"
@@ -33,3 +38,17 @@ module internal SynPat =
     let unit = createConst SynConst.Unit
 
     let createNull = SynPat.Null range0
+
+    let emptyList = SynPat.ArrayOrList (false, [], range0)
+
+    let listCons (lhs : SynPat) (rhs : SynPat) =
+        SynPat.ListCons (
+            lhs,
+            rhs,
+            range0,
+            {
+                ColonColonRange = range0
+            }
+        )
+
+    let emptyArray = SynPat.ArrayOrList (true, [], range0)

WoofWare.Myriad.Plugins/SynExpr/SynType.fs

@@ -1,56 +1,9 @@
 namespace WoofWare.Myriad.Plugins
 
+open System
 open Fantomas.FCS.Syntax
 open Fantomas.FCS.Text.Range
 
-[<RequireQualifiedAccess>]
-module internal SynType =
-    let rec stripOptionalParen (ty : SynType) : SynType =
-        match ty with
-        | SynType.Paren (ty, _) -> stripOptionalParen ty
-        | ty -> ty
-
-    let inline createLongIdent (ident : LongIdent) : SynType =
-        SynType.LongIdent (SynLongIdent.create ident)
-
-    let inline createLongIdent' (ident : string list) : SynType =
-        SynType.LongIdent (SynLongIdent.createS' ident)
-
-    let inline named (name : string) = createLongIdent' [ name ]
-
-    let inline app' (name : SynType) (args : SynType list) : SynType =
-        if args.IsEmpty then
-            failwith "Type cannot be applied to no arguments"
-
-        SynType.App (name, Some range0, args, List.replicate (args.Length - 1) range0, Some range0, false, range0)
-
-    let inline app (name : string) (args : SynType list) : SynType = app' (named name) args
-
-    let inline appPostfix (name : string) (arg : SynType) : SynType =
-        SynType.App (named name, None, [ arg ], [], None, true, range0)
-
-    let inline funFromDomain (domain : SynType) (range : SynType) : SynType =
-        SynType.Fun (
-            domain,
-            range,
-            range0,
-            {
-                ArrowRange = range0
-            }
-        )
-
-    let inline signatureParamOfType (ty : SynType) (name : Ident option) : SynType =
-        SynType.SignatureParameter ([], false, name, ty, range0)
-
-    let inline var (ty : SynTypar) : SynType = SynType.Var (ty, range0)
-
-    let unit : SynType = named "unit"
-    let int : SynType = named "int"
-
-    /// Given ['a1, 'a2] and 'ret, returns 'a1 -> 'a2 -> 'ret.
-    let toFun (inputs : SynType list) (ret : SynType) : SynType =
-        (ret, List.rev inputs) ||> List.fold (fun ty input -> funFromDomain input ty)
-
 [<AutoOpen>]
 module internal SynTypePatterns =
     let (|OptionType|_|) (fieldType : SynType) =
@@ -59,6 +12,11 @@ module internal SynTypePatterns =
             Some innerType
         | _ -> None
 
+    let (|ChoiceType|_|) (fieldType : SynType) =
+        match fieldType with
+        | SynType.App (SynType.LongIdent ident, _, inner, _, _, _, _) when SynLongIdent.isChoice ident -> Some inner
+        | _ -> None
+
     let (|NullableType|_|) (fieldType : SynType) =
         match fieldType with
         | SynType.App (SynType.LongIdent ident, _, [ innerType ], _, _, _, _) when SynLongIdent.isNullable ident ->
@@ -272,3 +230,228 @@ module internal SynTypePatterns =
                 | _ -> failwithf "Expected Task to be applied to exactly one arg, but got: %+A" args
             | _ -> None
         | _ -> None
+
+    let (|DirectoryInfo|_|) (fieldType : SynType) =
+        match fieldType with
+        | SynType.LongIdent (SynLongIdent.SynLongIdent (ident, _, _)) ->
+            match ident |> List.map (fun i -> i.idText) with
+            | [ "System" ; "IO" ; "DirectoryInfo" ]
+            | [ "IO" ; "DirectoryInfo" ]
+            | [ "DirectoryInfo" ] -> Some ()
+            | _ -> None
+        | _ -> None
+
+    let (|FileInfo|_|) (fieldType : SynType) =
+        match fieldType with
+        | SynType.LongIdent (SynLongIdent.SynLongIdent (ident, _, _)) ->
+            match ident |> List.map (fun i -> i.idText) with
+            | [ "System" ; "IO" ; "FileInfo" ]
+            | [ "IO" ; "FileInfo" ]
+            | [ "FileInfo" ] -> Some ()
+            | _ -> None
+        | _ -> None
+
+    let (|TimeSpan|_|) (fieldType : SynType) =
+        match fieldType with
+        | SynType.LongIdent (SynLongIdent.SynLongIdent (ident, _, _)) ->
+            match ident |> List.map (fun i -> i.idText) with
+            | [ "System" ; "TimeSpan" ]
+            | [ "TimeSpan" ] -> Some ()
+            | _ -> None
+        | _ -> None
+
+[<RequireQualifiedAccess>]
+module internal SynType =
+    let rec stripOptionalParen (ty : SynType) : SynType =
+        match ty with
+        | SynType.Paren (ty, _) -> stripOptionalParen ty
+        | ty -> ty
+
+    let inline createLongIdent (ident : LongIdent) : SynType =
+        SynType.LongIdent (SynLongIdent.create ident)
+
+    let inline createLongIdent' (ident : string list) : SynType =
+        SynType.LongIdent (SynLongIdent.createS' ident)
+
+    let inline named (name : string) = createLongIdent' [ name ]
+
+    let inline app' (name : SynType) (args : SynType list) : SynType =
+        if args.IsEmpty then
+            failwith "Type cannot be applied to no arguments"
+
+        SynType.App (name, Some range0, args, List.replicate (args.Length - 1) range0, Some range0, false, range0)
+
+    let inline app (name : string) (args : SynType list) : SynType = app' (named name) args
+
+    let inline appPostfix (name : string) (arg : SynType) : SynType =
+        SynType.App (named name, None, [ arg ], [], None, true, range0)
+
+    let inline appPostfix' (name : string list) (arg : SynType) : SynType =
+        SynType.App (createLongIdent' name, None, [ arg ], [], None, true, range0)
+
+    let inline funFromDomain (domain : SynType) (range : SynType) : SynType =
+        SynType.Fun (
+            domain,
+            range,
+            range0,
+            {
+                ArrowRange = range0
+            }
+        )
+
+    let inline signatureParamOfType (ty : SynType) (name : Ident option) : SynType =
+        SynType.SignatureParameter ([], false, name, ty, range0)
+
+    let inline var (ty : SynTypar) : SynType = SynType.Var (ty, range0)
+
+    let unit : SynType = named "unit"
+    let int : SynType = named "int"
+
+    let anon : SynType = SynType.Anon range0
+
+    let string : SynType = named "string"
+
+    /// Given ['a1, 'a2] and 'ret, returns 'a1 -> 'a2 -> 'ret.
+    let toFun (inputs : SynType list) (ret : SynType) : SynType =
+        (ret, List.rev inputs) ||> List.fold (fun ty input -> funFromDomain input ty)
+
+    let primitiveToHumanReadableString (name : LongIdent) : string =
+        match name |> List.map _.idText with
+        | [ "System" ; "Single" ] -> "single"
+        | [ "System" ; "Double" ] -> "double"
+        | [ "System" ; "Byte" ] -> "byte"
+        | [ "System" ; "SByte" ] -> "signed byte"
+        | [ "System" ; "Int16" ] -> "int16"
+        | [ "System" ; "Int32" ] -> "int32"
+        | [ "System" ; "Int64" ] -> "int64"
+        | [ "System" ; "UInt16" ] -> "uint16"
+        | [ "System" ; "UInt32" ] -> "uint32"
+        | [ "System" ; "UInt64" ] -> "uint64"
+        | [ "System" ; "Char" ] -> "char"
+        | [ "System" ; "Decimal" ] -> "decimal"
+        | [ "System" ; "String" ] -> "string"
+        | [ "System" ; "Boolean" ] -> "bool"
+        | ty ->
+            ty
+            |> String.concat "."
+            |> failwithf "could not create human-readable string for primitive type %s"
+
+    let rec toHumanReadableString (ty : SynType) : string =
+        match ty with
+        | PrimitiveType t1 -> primitiveToHumanReadableString t1
+        | OptionType t1 -> toHumanReadableString t1 + " option"
+        | NullableType t1 -> toHumanReadableString t1 + " Nullable"
+        | ChoiceType ts ->
+            ts
+            |> List.map toHumanReadableString
+            |> String.concat ", "
+            |> sprintf "Choice<%s>"
+        | MapType (k, v)
+        | DictionaryType (k, v)
+        | IDictionaryType (k, v)
+        | IReadOnlyDictionaryType (k, v) -> sprintf "map<%s, %s>" (toHumanReadableString k) (toHumanReadableString v)
+        | ListType t1 -> toHumanReadableString t1 + " list"
+        | ArrayType t1 -> toHumanReadableString t1 + " array"
+        | Task t1 -> toHumanReadableString t1 + " Task"
+        | UnitType -> "unit"
+        | FileInfo -> "FileInfo"
+        | DirectoryInfo -> "DirectoryInfo"
+        | Uri -> "URI"
+        | Stream -> "Stream"
+        | Guid -> "GUID"
+        | BigInt -> "bigint"
+        | DateTimeOffset -> "DateTimeOffset"
+        | DateOnly -> "DateOnly"
+        | TimeSpan -> "TimeSpan"
+        | ty -> failwithf "could not compute human-readable string for type: %O" ty
+
+    /// Guess whether the types are equal. We err on the side of saying "no, they're different".
+    let rec provablyEqual (ty1 : SynType) (ty2 : SynType) : bool =
+        if Object.ReferenceEquals (ty1, ty2) then
+            true
+        else
+
+        match ty1 with
+        | PrimitiveType t1 ->
+            match ty2 with
+            | PrimitiveType t2 -> (t1 |> List.map _.idText) = (t2 |> List.map _.idText)
+            | _ -> false
+        | OptionType t1 ->
+            match ty2 with
+            | OptionType t2 -> provablyEqual t1 t2
+            | _ -> false
+        | NullableType t1 ->
+            match ty2 with
+            | NullableType t2 -> provablyEqual t1 t2
+            | _ -> false
+        | ChoiceType t1 ->
+            match ty2 with
+            | ChoiceType t2 ->
+                t1.Length = t2.Length
+                && List.forall (fun (a, b) -> provablyEqual a b) (List.zip t1 t2)
+            | _ -> false
+        | DictionaryType (k1, v1) ->
+            match ty2 with
+            | DictionaryType (k2, v2) -> provablyEqual k1 k2 && provablyEqual v1 v2
+            | _ -> false
+        | IDictionaryType (k1, v1) ->
+            match ty2 with
+            | IDictionaryType (k2, v2) -> provablyEqual k1 k2 && provablyEqual v1 v2
+            | _ -> false
+        | IReadOnlyDictionaryType (k1, v1) ->
+            match ty2 with
+            | IReadOnlyDictionaryType (k2, v2) -> provablyEqual k1 k2 && provablyEqual v1 v2
+            | _ -> false
+        | MapType (k1, v1) ->
+            match ty2 with
+            | MapType (k2, v2) -> provablyEqual k1 k2 && provablyEqual v1 v2
+            | _ -> false
+        | ListType t1 ->
+            match ty2 with
+            | ListType t2 -> provablyEqual t1 t2
+            | _ -> false
+        | ArrayType t1 ->
+            match ty2 with
+            | ArrayType t2 -> provablyEqual t1 t2
+            | _ -> false
+        | Task t1 ->
+            match ty2 with
+            | Task t2 -> provablyEqual t1 t2
+            | _ -> false
+        | UnitType ->
+            match ty2 with
+            | UnitType -> true
+            | _ -> false
+        | FileInfo ->
+            match ty2 with
+            | FileInfo -> true
+            | _ -> false
+        | DirectoryInfo ->
+            match ty2 with
+            | DirectoryInfo -> true
+            | _ -> false
+        | Uri ->
+            match ty2 with
+            | Uri -> true
+            | _ -> false
+        | Stream ->
+            match ty2 with
+            | Stream -> true
+            | _ -> false
+        | Guid ->
+            match ty2 with
+            | Guid -> true
+            | _ -> false
+        | BigInt ->
+            match ty2 with
+            | BigInt -> true
+            | _ -> false
+        | DateTimeOffset ->
+            match ty2 with
+            | DateTimeOffset -> true
+            | _ -> false
+        | DateOnly ->
+            match ty2 with
+            | DateOnly -> true
+            | _ -> false
+        | _ -> false

WoofWare.Myriad.Plugins/SynExpr/SynUnionCase.fs

@@ -1,6 +1,9 @@
 namespace WoofWare.Myriad.Plugins
 
 open Fantomas.FCS.Syntax
+open Fantomas.FCS.Text.Range
+open Fantomas.FCS.Xml
+open Fantomas.FCS.SyntaxTrivia
 
 type internal UnionCase<'Ident> =
     {
@@ -39,3 +42,34 @@ module internal SynUnionCase =
             Attrs = attrs
             Ident = id
         }
+
+    let create (case : UnionCase<Ident>) : SynUnionCase =
+        let fields =
+            case.Fields
+            |> List.map (fun field ->
+                SynField.SynField (
+                    SynAttributes.ofAttrs field.Attrs,
+                    false,
+                    Some field.Ident,
+                    field.Type,
+                    false,
+                    PreXmlDoc.Empty,
+                    None,
+                    range0,
+                    {
+                        LeadingKeyword = None
+                    }
+                )
+            )
+
+        SynUnionCase.SynUnionCase (
+            SynAttributes.ofAttrs case.Attrs,
+            SynIdent.SynIdent (case.Ident, None),
+            SynUnionCaseKind.Fields fields,
+            PreXmlDoc.Empty,
+            None,
+            range0,
+            {
+                BarRange = Some range0
+            }
+        )

WoofWare.Myriad.Plugins/Teq.fs

@@ -0,0 +1,18 @@
+namespace WoofWare.Myriad.Plugins
+
+// Extracted from https://github.com/G-Research/TypeEquality
+// which is Apache-2.0 licenced. See `TeqLicence.txt`.
+// We inline this code because Myriad doesn't seem to reliably load package references in the generator.
+// I have reformatted a little, and stripped out all the code I don't use.
+
+type internal Teq<'a, 'b> = private | Teq of ('a -> 'b) * ('b -> 'a)
+
+[<RequireQualifiedAccess>]
+module internal Teq =
+
+    let refl<'a> : Teq<'a, 'a> = Teq (id, id)
+    let cast (Teq (f, _)) a = f a
+
+    [<RequireQualifiedAccess>]
+    module Cong =
+        let believeMe<'a, 'b, 'a2, 'b2> (_ : Teq<'a, 'b>) : Teq<'a2, 'b2> = unbox <| (refl : Teq<'a2, 'a2>)

WoofWare.Myriad.Plugins/TeqLicence.txt

@@ -0,0 +1,201 @@
+Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
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+      (an example is provided in the Appendix below).
+
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+      of this License, Derivative Works shall not include works that remain
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+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
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+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
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+   3. Grant of Patent License. Subject to the terms and conditions of
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+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
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+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
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+      file or class name and description of purpose be included on the
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+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

WoofWare.Myriad.Plugins/WoofWare.Myriad.Plugins.fsproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>net6.0</TargetFramework>
@@ -18,25 +18,27 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Myriad.Core" Version="0.8.3" PrivateAssets="all"/>
+    <PackageReference Include="Myriad.Core" Version="0.8.3" />
     <!-- the lowest version allowed by Myriad.Core -->
     <PackageReference Update="FSharp.Core" Version="6.0.1" PrivateAssets="all"/>
   </ItemGroup>
 
   <ItemGroup>
     <Compile Include="List.fs"/>
+    <Compile Include="Teq.fs" />
     <Compile Include="Primitives.fs" />
+    <Compile Include="SynExpr\SynAttributes.fs" />
     <Compile Include="SynExpr\PreXmlDoc.fs" />
     <Compile Include="SynExpr\Ident.fs" />
     <Compile Include="SynExpr\SynLongIdent.fs" />
     <Compile Include="SynExpr\SynExprLetOrUseTrivia.fs" />
+    <Compile Include="SynExpr\SynArgPats.fs" />
     <Compile Include="SynExpr\SynPat.fs" />
     <Compile Include="SynExpr\SynBinding.fs" />
     <Compile Include="SynExpr\SynType.fs" />
     <Compile Include="SynExpr\SynMatchClause.fs" />
     <Compile Include="SynExpr\CompExpr.fs" />
     <Compile Include="SynExpr\SynExpr.fs" />
-    <Compile Include="SynExpr\SynArgPats.fs" />
     <Compile Include="SynExpr\SynField.fs" />
     <Compile Include="SynExpr\SynUnionCase.fs" />
     <Compile Include="SynExpr\SynTypeDefnRepr.fs" />
@@ -54,6 +56,8 @@
     <Compile Include="JsonParseGenerator.fs"/>
     <Compile Include="HttpClientGenerator.fs"/>
     <Compile Include="CataGenerator.fs" />
+    <Compile Include="ArgParserGenerator.fs" />
+    <None Include="TeqLicence.txt" />
     <EmbeddedResource Include="version.json"/>
     <EmbeddedResource Include="SurfaceBaseline.txt"/>
     <None Include="..\README.md">

WoofWare.Myriad.Plugins/version.json

@@ -1,12 +1,12 @@
 {
-  "version": "2.1",
+  "version": "2.2",
   "publicReleaseRefSpec": [
     "^refs/heads/main$"
   ],
   "pathFilters": [
     "./",
     ":/WoofWare.Myriad.Plugins.Attributes",
-    "^:/WoofWare.Myriad.Plugins.Attributes/Test",
+    ":^/WoofWare.Myriad.Plugins.Attributes/Test",
     ":/global.json",
     ":/README.md",
     ":/Directory.Build.props"

analyzers/analyzers.fsproj

@@ -10,7 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageDownload Include="G-Research.FSharp.Analyzers" Version="[0.10.0]" />
+    <PackageDownload Include="G-Research.FSharp.Analyzers" Version="[0.11.0]" />
   </ItemGroup>
 
 </Project>

flake.lock

@@ -5,11 +5,11 @@
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1701680307,
-        "narHash": "sha256-kAuep2h5ajznlPMD9rnQyffWG8EM/C73lejGofXvdM8=",
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "4022d587cbbfd70fe950c1e2083a02621806a725",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
         "type": "github"
       },
       "original": {
@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1706367331,
-        "narHash": "sha256-AqgkGHRrI6h/8FWuVbnkfFmXr4Bqsr4fV23aISqj/xg=",
+        "lastModified": 1725099143,
+        "narHash": "sha256-CHgumPZaC7z+WYx72WgaLt2XF0yUVzJS60rO4GZ7ytY=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "160b762eda6d139ac10ae081f8f78d640dd523eb",
+        "rev": "5629520edecb69630a3f4d17d3d33fc96c13f6fe",
         "type": "github"
       },
       "original": {

flake.nix

@@ -17,7 +17,7 @@
       dotnet-sdk = pkgs.dotnet-sdk_8;
       dotnet-runtime = pkgs.dotnetCorePackages.runtime_8_0;
       version = "0.1";
-      dotnetTool = dllOverride: toolName: toolVersion: sha256:
+      dotnetTool = dllOverride: toolName: toolVersion: hash:
         pkgs.stdenvNoCC.mkDerivation rec {
           name = toolName;
           version = toolVersion;
@@ -25,7 +25,7 @@
           src = pkgs.fetchNuGet {
             pname = name;
             version = version;
-            sha256 = sha256;
+            hash = hash;
             installPhase = ''mkdir -p $out/bin && cp -r tools/net6.0/any/* $out/bin'';
           };
           installPhase = let
@@ -43,8 +43,8 @@
         };
     in {
       packages = {
-        fantomas = dotnetTool null "fantomas" (builtins.fromJSON (builtins.readFile ./.config/dotnet-tools.json)).tools.fantomas.version (builtins.head (builtins.filter (elem: elem.pname == "fantomas") ((import ./nix/deps.nix) {fetchNuGet = x: x;}))).sha256;
-        fsharp-analyzers = dotnetTool "FSharp.Analyzers.Cli" "fsharp-analyzers" (builtins.fromJSON (builtins.readFile ./.config/dotnet-tools.json)).tools.fsharp-analyzers.version (builtins.head (builtins.filter (elem: elem.pname == "fsharp-analyzers") ((import ./nix/deps.nix) {fetchNuGet = x: x;}))).sha256;
+        fantomas = dotnetTool null "fantomas" (builtins.fromJSON (builtins.readFile ./.config/dotnet-tools.json)).tools.fantomas.version (builtins.head (builtins.filter (elem: elem.pname == "fantomas") ((import ./nix/deps.nix) {fetchNuGet = x: x;}))).hash;
+        fsharp-analyzers = dotnetTool "FSharp.Analyzers.Cli" "fsharp-analyzers" (builtins.fromJSON (builtins.readFile ./.config/dotnet-tools.json)).tools.fsharp-analyzers.version (builtins.head (builtins.filter (elem: elem.pname == "fsharp-analyzers") ((import ./nix/deps.nix) {fetchNuGet = x: x;}))).hash;
         default = pkgs.buildDotnetModule {
           inherit pname version dotnet-sdk dotnet-runtime;
           name = "WoofWare.Myriad.Plugins";

nix/deps.nix

@@ -3,327 +3,327 @@
 {fetchNuGet}: [
   (fetchNuGet {
     pname = "ApiSurface";
-    version = "4.0.43";
-    sha256 = "0bx09n3c751vz7v39pcdm6zb8k5p01fzc2vlclgkxg4nj38mmvh8";
+    version = "4.1.5";
+    hash = "sha256-Kbt18XLk1gvZfzGca885HaXZB119APay85KzI546PYM=";
   })
   (fetchNuGet {
     pname = "fantomas";
-    version = "6.3.9";
-    sha256 = "1b34iiiff02bbzjv03zyna8xmrgs6y87zdvp5i5k58fcqpjw44sx";
+    version = "6.3.11";
+    hash = "sha256-11bHGEAZTNtdp2pTg5zqLrQiyI/j/AT7GGL/2CR4+dw=";
   })
   (fetchNuGet {
     pname = "Fantomas.Core";
     version = "6.1.1";
-    sha256 = "1h2wsiy4fzwsg9vrlpk6w7zsvx6bc4wg4x25zqc48akg04fwpi0m";
+    hash = "sha256-FcTLHQFvKkQY/kV08jhhy/St/+FmXpp3epp/R3zUXMA=";
   })
   (fetchNuGet {
     pname = "Fantomas.FCS";
     version = "6.1.1";
-    sha256 = "0733dm5zjdp8w5wwalqlv1q52pghfr04863i9wy807f4qfd7rrin";
+    hash = "sha256-NuZ8msPEHYA8T3EYREB28F1RcNgUU8V54eg2+UttYxw=";
   })
   (fetchNuGet {
     pname = "FsCheck";
     version = "2.16.6";
-    sha256 = "176rwky6b5rk8dzldiz4068p7m9c5y9ygzbhadrs14jkl94pc56n";
+    hash = "sha256-1hR2SaJTkqBzU3D955MvLNVzkQHkx0Z/QzOXZfzk2Zw=";
   })
   (fetchNuGet {
     pname = "fsharp-analyzers";
-    version = "0.26.0";
-    sha256 = "0xgv5kvbwfdvcp6s8x7xagbbi4s3mqa4ixni6pazqvyflbgnah7b";
+    version = "0.27.0";
+    hash = "sha256-QhLi2veTY1wZlQKJLTyVPgx/ImkaZugQNjSN5VJCNEA=";
   })
   (fetchNuGet {
     pname = "FSharp.Core";
     version = "4.3.4";
-    sha256 = "1sg6i4q5nwyzh769g76f6c16876nvdpn83adqjr2y9x6xsiv5p5j";
+    hash = "sha256-styyo+6mJy+yxE0NZG/b1hxkAjPOnJfMgd9zWzCJ5uk=";
   })
   (fetchNuGet {
     pname = "FSharp.Core";
     version = "6.0.1";
-    sha256 = "0qks2aadkhsffg9a6xq954ll9xacnph852avd7ljh9n2g6vj06qj";
+    hash = "sha256-Ehsgt3nCJijpaVuJguC1TPVEKSkJd6PSc07D2ZQSemI=";
   })
   (fetchNuGet {
     pname = "FSharp.Core";
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