README.md: Add explicit "Links" and "Releases" sections

Instead of generating the "Links" and "Releases" sections on the fly
and adding them to the end of the README.md before processing it with
aux/workflow/README.sh, embed those sections directly and use
aux/workflow/assert-readme.sh to make sure the metadata is there.

Before we had:
1. generate "Links" and "Releases" on the fly inside
   aux/workflow/README.sh;
2. add those sections to the end of the README.md;
3. use the custom pandoc build command inside the
   aux/workflow/README.sh file.

Now we have:
1. embed "Links" and "Releases" in the README.md directly;
2. use aux/workflow/assert-readme.sh to validate the correct metadata;
3. use the vanilla aux/workflow/commonmark.sh to generate the HTML.

3 files changed, 21 insertions, 29 deletions

diff --git a/aux/workflow/README.sh b/aux/workflow/assert-readme.sh
index 51ab5bf..47f7e25 100755
--- a/aux/workflow/README.sh
+++ b/aux/workflow/assert-readme.sh
@@ -3,23 +3,12 @@ set -eu
 
 mkdir -p public
 
-PROJECT_UC="$1"
-PROJECT="$2"
-MAILING_LIST="$3"
+PROJECT="$1"
+MAILING_LIST="$2"
 
-RELEASES_LIST="$(mktemp)"
-for version in $(git tag | perl -e 'print reverse <>'); do
-	echo "- version [$version](https://git.euandreh.xyz/$PROJECT/snapshot/$PROJECT-$version.tar.gz) ([sig](https://git.euandreh.xyz/$PROJECT/snapshot/$PROJECT-$version.tar.gz.asc)), released in $(git log -1 --format=%cd --date=short "$version")" >> "$RELEASES_LIST"
-done
+EXPECTED="$(mktemp)"
+cat <<EOF >> "$EXPECTED"
 
-RELEASES="$(mktemp)"
-if [ -s "$RELEASES_LIST" ]; then
-	printf '\n# Releases\n\n' >> "$RELEASES"
-	cat "$RELEASES_LIST" >> "$RELEASES"
-fi
-
-LINKS="$(mktemp)"
-cat <<EOF > "$LINKS"
 
 # Links
 
@@ -31,15 +20,17 @@ cat <<EOF > "$LINKS"
 - [CHANGELOG](https://$PROJECT.euandreh.xyz/CHANGELOG.html)
 EOF
 
-cat "README.md" "$LINKS" "$RELEASES" | \
-	pandoc \
-		--toc                                   \
-		--highlight-style pygments              \
-		--toc-depth=2                           \
-		-s                                      \
-		--metadata title="$PROJECT_UC - README" \
-		--metadata lang=en                      \
-		-r commonmark                           \
-		-w html                                 \
-		-H aux/workflow/favicon.html            \
-		> public/index.html
+RELEASES_LIST="$(mktemp)"
+for version in $(git tag | perl -e 'print reverse <>'); do
+	echo "- version [$version](https://git.euandreh.xyz/$PROJECT/snapshot/$PROJECT-$version.tar.gz) ([sig](https://git.euandreh.xyz/$PROJECT/snapshot/$PROJECT-$version.tar.gz.asc)), released in $(git log -1 --format=%cd --date=short "$version")" >> "$RELEASES_LIST"
+done
+
+if [ -s "$RELEASES_LIST" ]; then
+	printf '\n\n# Releases\n\n' >> "$EXPECTED"
+	cat "$RELEASES_LIST" >> "$EXPECTED"
+fi
+
+if ! tail -n "$(wc -l < "$EXPECTED")" README.md | diff - "$EXPECTED"; then
+	echo 'Missing metadata at the end of README.md file'
+	exit 1
+fi
diff --git a/aux/workflow/commonmark.sh b/aux/workflow/commonmark.sh
index e97751b..6016f51 100755
--- a/aux/workflow/commonmark.sh
+++ b/aux/workflow/commonmark.sh
@@ -5,6 +5,7 @@ mkdir -p public
 
 PROJECT_UC="$1"
 F="$2"
+OUT="${3:-${F%.*}.html}"
 
 pandoc \
 	--toc                                    \
@@ -16,4 +17,4 @@ pandoc \
 	-r commonmark                            \
 	-w html                                  \
 	-H aux/workflow/favicon.html             \
-	< "$F" > "public/${F%.*}.html"
+	< "$F" > "public/$OUT"
diff --git a/aux/workflow/public.sh b/aux/workflow/public.sh
index b8840db..14a8e65 100755
--- a/aux/workflow/public.sh
+++ b/aux/workflow/public.sh
@@ -6,7 +6,7 @@ PROJECT="$2"
 MAILING_LIST="$3"
 
 sh aux/workflow/TODOs.sh  "$PROJECT_UC" "$PROJECT" "$MAILING_LIST"
-sh aux/workflow/README.sh "$PROJECT_UC" "$PROJECT" "$MAILING_LIST"
+sh aux/workflow/commonmark.sh "$PROJECT" README.md index.html
 
 if [ -f CHANGELOG.md ]; then
 	sh aux/workflow/commonmark.sh "$PROJECT" CHANGELOG.md