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#!/usr/bin/env bash
# Per-project language-bundle freshness check, designed to run at startup.
#
# Detects which language bundle(s) a project has by fingerprint (no marker
# file), then reconciles them against the canonical rulesets source:
# - AUTO-FIX (rulesets-owned, safe to overwrite): .claude/rules/*.md,
# .claude/hooks/*, githooks/*
# - SURFACE (project may customize — reported, never written):
# .claude/settings.json
# CLAUDE.md is intentionally not tracked: it is seed-only in install-lang
# and project-owned afterward (diff-lang skips it for the same reason).
#
# Usage: sync-language-bundle.sh [project-path] (default: $PWD)
#
# Exit: 0 no bundle, or clean / rules+hooks auto-fixed (resolved)
# 3 manual action recommended (settings.json / CLAUDE.md drift)
# 1 usage / path error
#
# Quiet when there is nothing to report. Resolves the canonical source
# relative to its own location, so it always reads the current checkout.
set -u
PROJECT="${1:-$PWD}"
REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
LANG_ROOT="$REPO_ROOT/languages"
GENERIC_RULES="$REPO_ROOT/claude-rules"
if [ ! -d "$PROJECT" ]; then
echo "ERROR: project path does not exist: $PROJECT" >&2
exit 1
fi
PROJECT="$(cd "$PROJECT" && pwd)"
[ -d "$LANG_ROOT" ] || exit 0 # no bundles available — nothing to do
OUT="" # buffered report, printed once at the end
FIXED=0
MANUAL=0
HEADER_DONE=0
CUR_HEADER=""
ensure_header() {
if [ "$HEADER_DONE" -eq 0 ]; then
OUT+="$CUR_HEADER"$'\n'
HEADER_DONE=1
fi
}
# fix SRC DST [exec] — overwrite DST from SRC if missing or differing.
fix() {
local src="$1" dst="$2" want_exec="${3:-}"
[ -f "$src" ] || return 0
if [ ! -f "$dst" ] || ! diff -q "$src" "$dst" >/dev/null 2>&1; then
mkdir -p "$(dirname "$dst")"
cp "$src" "$dst"
[ "$want_exec" = exec ] && chmod +x "$dst"
ensure_header
OUT+=" fixed ${dst#"$PROJECT"/}"$'\n'
FIXED=$((FIXED + 1))
fi
}
# surface SRC DST — report DST drift without writing.
surface() {
local src="$1" dst="$2" reason=""
[ -f "$src" ] || return 0
if [ ! -f "$dst" ]; then
reason="missing"
elif ! diff -q "$src" "$dst" >/dev/null 2>&1; then
reason="differs"
else
return 0
fi
ensure_header
OUT+=" drift ${dst#"$PROJECT"/} ($reason — not auto-fixed)"$'\n'
MANUAL=$((MANUAL + 1))
}
for src_lang in "$LANG_ROOT"/*/; do
[ -d "$src_lang" ] || continue
src_lang="${src_lang%/}"
lang="$(basename "$src_lang")"
lang_rules="$src_lang/claude/rules"
[ -d "$lang_rules" ] || continue
# Fingerprint: project has this bundle iff any of the language's own
# rule files is present in .claude/rules/.
detected=0
for rf in "$lang_rules"/*.md; do
[ -f "$rf" ] || continue
if [ -f "$PROJECT/.claude/rules/$(basename "$rf")" ]; then
detected=1
break
fi
done
[ "$detected" -eq 1 ] || continue
CUR_HEADER="language bundle '$lang' — $PROJECT:"
HEADER_DONE=0
manual_before=$MANUAL
# AUTO-FIX: generic rules (shared) + language rules
for f in "$GENERIC_RULES"/*.md; do
[ -f "$f" ] || continue
fix "$f" "$PROJECT/.claude/rules/$(basename "$f")"
done
for f in "$lang_rules"/*.md; do
[ -f "$f" ] || continue
fix "$f" "$PROJECT/.claude/rules/$(basename "$f")"
done
# AUTO-FIX: language hooks (executable)
if [ -d "$src_lang/claude/hooks" ]; then
while IFS= read -r f; do
rel="${f#"$src_lang"/claude/}"
fix "$f" "$PROJECT/.claude/$rel" exec
done < <(find "$src_lang/claude/hooks" -type f)
fi
# AUTO-FIX: githooks (executable)
if [ -d "$src_lang/githooks" ]; then
while IFS= read -r f; do
rel="${f#"$src_lang"/githooks/}"
fix "$f" "$PROJECT/githooks/$rel" exec
done < <(find "$src_lang/githooks" -type f)
fi
# SURFACE-ONLY: settings.json may carry project customization, so report
# rather than overwrite. (CLAUDE.md is intentionally untracked here — it's
# seed-only in install-lang and project-owned after, same as diff-lang skips it.)
surface "$src_lang/claude/settings.json" "$PROJECT/.claude/settings.json"
if [ "$MANUAL" -gt "$manual_before" ]; then
OUT+=" → reconcile: make install-$lang PROJECT=."$'\n'
fi
done
[ -n "$OUT" ] && printf '%s' "$OUT"
[ "$MANUAL" -gt 0 ] && exit 3
exit 0
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