fix(fonts): fix the timestamp of fonts to the epoch (#3370)

* fix: fix the timestamp of fonts to the epoch

* fix: update fonts

Co-authored-by: Erik Demaine <edemaine@mit.edu>

.github/workflows/fonts.yml

@@ -97,13 +97,11 @@ jobs:
 
     - name: Build fonts
       run: |
-        export SOURCE_DATE_EPOCH=$(git log -1 --format=%ct -- src/fonts)
         make -C src/fonts all
         rm -f fonts/*.*
         cp src/fonts/ttf/*.ttf fonts
         cp src/fonts/woff/*.woff fonts
         cp src/fonts/woff2/*.woff2 fonts
-        echo $SOURCE_DATE_EPOCH > fonts/VERSION
 
     - name: Build metrics
       run: ./dockers/fonts/buildMetrics.sh

dockers/fonts/buildFonts.sh

@@ -40,7 +40,6 @@ cleanup() {
 CONTAINER=
 trap cleanup EXIT
 
-LAST_COMMIT_DATE="$(git log -1 --format=%ct -- src/fonts)"
 IMAGE="katex/fonts:DF-$(openssl sha1 dockers/fonts/Dockerfile | tail -c 9)"
 TMPFILE="$(mktemp "${TMPDIR:-/tmp}/mjf.XXXXXXXX")"
 FILE="$TMPFILE"
@@ -59,7 +58,6 @@ if [[ $(docker images "$IMAGE" | wc -l) -lt 2 ]]; then
 fi
 
 CMDS="set -ex
-export SOURCE_DATE_EPOCH=${LAST_COMMIT_DATE}
 tar xfP katex-fonts.tar.gz
 make -C fonts all
 tar cf /fonts.tar ${filetypes[*]/#/fonts/}"
@@ -84,5 +82,3 @@ for filetype in "${filetypes[@]}"; do
     done
 done
 rm -rf temp fonts.tar
-
-echo $LAST_COMMIT_DATE > fonts/VERSION

fonts/VERSION

@@ -1 +0,0 @@
-1630515774

src/fonts/generate_fonts.py

@@ -15,13 +15,12 @@ if len(sys.argv) < 2:
 font_file = sys.argv[1]
 font_name = os.path.splitext(os.path.basename(font_file))[0]
 
-# now or SOURCE_DATE_EPOCH, if present
-timestamp = timestampNow()
 
 font = TTFont(font_file, recalcBBoxes=False, recalcTimestamp=False)
 
-font['head'].created = timestamp
-font['head'].modified = timestamp
+# fix timestamp to the epoch
+font['head'].created = 0
+font['head'].modified = 0
 
 # remove fontforge timestamps
 if 'FFTM' in font:
@@ -36,8 +35,6 @@ if 'GDEF' in font:
 font['name'].names = [record for record in font['name'].names if record.platformID != 1]
 font['cmap'].tables = [table for table in font['cmap'].tables if table.platformID != 1]
 
-font['name'].setName('Version ' + str(timestamp), 5, 3, 1, 1033)
-
 # fix OS/2 and hhea metrics
 glyf = font['glyf']
 ascent = int(max(glyf[c].yMax for c in font.getGlyphOrder() if hasattr(glyf[c], "yMax")))