pre-push: automagically update the version

Apart from keeping the `.js` and `npm prepare` parts and adjusting the
expected package name in `package*.json` to `rss-to-issues`, this is
pretty much a verbatim copy-pasta of the `pre-push.hook` from
https://github.com/git-for-windows/get-azure-pipelines-artifact/.

Signed-off-by: Johannes Schindelin <[email protected]>

pre-push.hook

@@ -13,20 +13,37 @@ LF='
 '
 
 git diff --no-index --quiet pre-push.hook "$(git rev-parse --git-path hooks/pre-push)" ||
-die 'The `pre-push` hook is not up to date with `pre-push.hook`'
+die 'The `pre-push` hook is not up to date with `pre-push.hook`. Please update:
+
+	cp pre-push.hook .git/hooks/pre-push'
 
 # Verify that any tagged version is reflected in its `package.json`
 for tag in $(git for-each-ref --format='%(refname:short)' --points-at=HEAD 'refs/tags/v[0-9]*')
 do
     out="$(git tag --verify $tag 2>&1)" ||
     die "$out$LF${LF}Tag $tag is not signed/signature cannot be verified"
 
-    git grep -q '"version": "'"${tag#v}"'"' refs/tags/$tag -- package.json || {
-        sed 's/\("version": "\)[^"]*/\1'"${tag#v}"/ <package.json >package.json.new &&
+    test 0 = $(git rev-list --count ...main) || die 'HEAD is not up to date with `main`'
+    test 0 = $(git rev-list --count ...origin/main) ||
+    echo 'warning: HEAD is not up to date with `origin/main`' >&2
+
+    regex="^  \"version\": \"$(echo "${tag#v}" | sed 's/\./\\./g')\",\$"
+    substitute="/\"name\": \"rss-to-issues\"/{N;s/\\(\"version\": \"\\).*\",\$/\\1${tag#v}\",/}"
+    git grep -q "$regex" refs/tags/$tag -- package.json || {
+        sed "$substitute" <package.json >package.json.new &&
         mv -f package.json.new package.json
+        sed "$substitute" <package-lock.json >package-lock.json.new &&
+        mv -f package-lock.json.new package-lock.json
         die "package.json did not reflect $tag; It was adjusted."
         exit 1
     }
+
+    git grep -q "$regex" refs/tags/$tag -- package-lock.json || {
+        sed "$substitute" <package-lock.json >package-lock.json.new &&
+        mv -f package-lock.json.new package-lock.json
+        die "package-lock.json did not reflect $tag; It was adjusted."
+        exit 1
+    }
 done
 
 git diff --quiet dist/ ||
@@ -42,4 +59,4 @@ then
         echo "Committing dist/ because it was not up to date" >&2
         git commit -sm "npm run prepare" dist/
     fi
-fi
+fi