Add build script

.gitignore

@@ -8,3 +8,4 @@
 *.pdf
 
 .DS_Store
+/result

build.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+USER_DIR=$(readlink -f "$1")
+WORKDIR=$(mktemp -d -p "$USER_DIR")
+
+cd "$WORKDIR" || exit 1
+
+# Build PDFs from LaTeX. Do the build twice to sort out any bookmarks.
+find "$USER_DIR" -type f -name '*.tex' -print0 | while IFS= read -r -d '' file; do
+  echo ">>> $file"
+  ls -la "$file"
+  output=$(dirname "$file")/$(basename "$file" .tex).pdf
+  if [ -f "$output" ]; then
+      echo "Skipping $file as already built"
+      exit 0
+  fi
+  echo "$file - $output"
+  HOME=$(pwd) SOURCE_DATE_EPOCH=1622905527 pdflatex "$file" || exit 1
+  HOME=$(pwd) SOURCE_DATE_EPOCH=1622905527 pdflatex "$file" || exit 1
+  mv "$(basename "$output")" "$output" || exit 1
+done
+
+cd "$USER_DIR" || exit 1
+rm -r "$WORKDIR"

flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1694529238,
+        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1688392541,
+        "narHash": "sha256-lHrKvEkCPTUO+7tPfjIcb7Trk6k31rz18vkyqmkeJfY=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ea4c80b39be4c09702b0cb3b42eab59e2ba4f24b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-22.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,77 @@
+{
+  description = "PDFs hosted on patrickstevens.co.uk";
+
+  inputs = {
+    flake-utils.url = github:numtide/flake-utils;
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+  }: let
+    commit = self.shortRev or "dirty";
+    date = self.lastModifiedDate or self.lastModified or "19700101";
+    version = "1.0.0+${builtins.substring 0 8 date}.${commit}";
+  in
+    flake-utils.lib.eachDefaultSystem (system: let
+      pkgs = nixpkgs.legacyPackages.${system};
+    in let
+      texlive = pkgs.texlive.combine {
+        inherit (pkgs.texlive) scheme-medium mdframed etoolbox zref needspace tikz-cd;
+      };
+    in let
+      createShellScript = name: contents:
+        pkgs.stdenv.mkDerivation {
+          __contentAddressed = true;
+          pname = name;
+          version = "0.1.0";
+          src = contents;
+
+          buildInputs = [
+            pkgs.shellcheck
+          ];
+
+          phases = ["configurePhase" "buildPhase" "installPhase"];
+
+          configurePhase = ''
+            ${pkgs.shellcheck}/bin/shellcheck "${contents}"
+          '';
+
+          buildPhase = ''
+            cp "${contents}" run.sh
+            patchShebangs run.sh
+            sed -i 's_"/bin/bash"_"${pkgs.bash}/bin/bash"_' run.sh
+          '';
+
+          installPhase = ''
+            mkdir -p $out
+            mv run.sh $out/run.sh
+          '';
+        };
+    in let
+      buildLatex = createShellScript "latex" ./build.sh;
+    in {
+      packages.default = pkgs.stdenv.mkDerivation {
+        __contentAddressed = true;
+        inherit version;
+        pname = "patrickstevens.co.uk-pdfs";
+        src = ./.;
+        buildInputs = [texlive buildLatex];
+        buildPhase = ''
+          ${pkgs.bash}/bin/sh ${buildLatex}/run.sh .
+        '';
+
+        installPhase = ''
+          mkdir -p $out
+          cp ./*.pdf $out
+          cp ./*.tex $out
+          cp ./pdf-targets.txt $out
+        '';
+      };
+      devShells.default = pkgs.mkShell {
+        buildInputs = [pkgs.alejandra pkgs.shellcheck];
+      };
+    });
+}