improve: nix flakebox fmt

misc/git-hooks/commit-msg

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+# Sanitize file first, by removing leading lines that are empty or start with a hash,
+# as `convco` currently does not do it automatically (but git will)
+# TODO: next release of convco should be able to do it automatically
+MESSAGE="$(
+  while read -r line ; do
+    # skip any initial comments (possibly from previous run)
+    if [ -z "${body_detected:-}" ] && { [[ "$line" =~ ^#.*$ ]] || [ "$line" == "" ]; }; then
+      continue
+    fi
+    body_detected="true"
+
+    echo "$line"
+  done < "$1"
+)"
+
+# convco fails on fixup!, so remove fixup! prefix
+MESSAGE="${MESSAGE#fixup! }"
+if ! convco check --from-stdin <<<"$MESSAGE" ; then
+   >&2 echo "Please follow conventional commits(https://www.conventionalcommits.org)"
+   >&2 echo "Use git recommit <args> to fix your commit"
+  exit 1
+fi