From 00e5de525bde5d0d77d9553c6126908f2fdfde20 Mon Sep 17 00:00:00 2001 From: Paul Buetow Date: Sun, 15 Feb 2026 14:14:32 +0200 Subject: Improve --generate performance with incremental builds (62s -> 2s) Add mtime-based skip logic to avoid regenerating unchanged files: - generate::fromgmi skips .gmi files where all outputs are newer - template::_generate_file skips templates when output is fresh - Diff-before-overwrite in templates, gemfeed, and notes indexes to preserve mtimes and prevent cascading cache invalidation - Global dependency check (.lastgen sentinel) for header/footer/CSS - Job throttling via wait -n capped at nproc cores - Add --force flag and FORCE_REBUILD env var to bypass skip logic - Fix misleading atom feed "empty cache" log message Co-Authored-By: Claude Opus 4.6 --- lib/gemfeed.source.sh | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) (limited to 'lib/gemfeed.source.sh') diff --git a/lib/gemfeed.source.sh b/lib/gemfeed.source.sh index f069ef5..c405083 100644 --- a/lib/gemfeed.source.sh +++ b/lib/gemfeed.source.sh @@ -19,7 +19,12 @@ gemfeed::updatemainindex () { $SED -E -n '/^=> / { s| ./| ./gemfeed/|; p; }' \ "$gemfeed_dir/index.gmi" >> "$index_gmi.tmp" - mv "$index_gmi.tmp" "$index_gmi" + # Only overwrite if content changed, preserving mtime for template skip logic + if [[ -f "$index_gmi" ]] && diff -q "$index_gmi.tmp" "$index_gmi" >/dev/null 2>&1; then + rm "$index_gmi.tmp" + else + mv "$index_gmi.tmp" "$index_gmi" + fi } gemfeed::_get_word_count () { @@ -59,7 +64,12 @@ GEMFEED "$gemfeed_dir/index.gmi.tmp" done < <(gemfeed::get_posts) - mv "$gemfeed_dir/index.gmi.tmp" "$gemfeed_dir/index.gmi" + # Only overwrite if content changed, preserving mtime for template skip logic + if [[ -f "$gemfeed_dir/index.gmi" ]] && diff -q "$gemfeed_dir/index.gmi.tmp" "$gemfeed_dir/index.gmi" >/dev/null 2>&1; then + rm "$gemfeed_dir/index.gmi.tmp" + else + mv "$gemfeed_dir/index.gmi.tmp" "$gemfeed_dir/index.gmi" + fi gemfeed::updatemainindex } -- cgit v1.2.3