From 92446aba47b0e0db28f7b858ea387efcca30ab44 Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Sun, 25 Feb 2007 02:18:11 -0500 Subject: [PATCH] Don't modify CREDITS-FILE if it hasn't changed. We should always avoid rewriting a built file during `make install` if nothing has changed since `make all`. This is to help support the typical installation process of compiling a package as yourself, then installing it as root. Forcing CREDITS-FILE to be always be rebuilt in the Makefile means that CREDITS-GEN needs to check for a change and only update CREDITS-FILE if the file content actually differs. After all, content is king in Git. Signed-off-by: Junio C Hamano Signed-off-by: Shawn O. Pearce --- CREDITS-GEN | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) diff --git a/CREDITS-GEN b/CREDITS-GEN index da2c07629..d1b0f8635 100755 --- a/CREDITS-GEN +++ b/CREDITS-GEN @@ -20,8 +20,8 @@ tree_search () generate_credits () { tip=$1 && - rm -f $CF && - git shortlog -n -s $tip | sed 's/: .*$//' >$CF || exit + rm -f "$2" && + git shortlog -n -s $tip | sed 's/: .*$//' >"$2" || exit } # Always use the tarball credits file if found, just @@ -36,10 +36,14 @@ generate_credits () # that fact. # +credits_tmp=/var/tmp/gitgui-credits-$$ +trap 'rm -f "$credits_tmp"' 0 + +orig="$credits_tmp" + if test -f credits then - rm -f $CF && - cp credits $CF || exit + orig=credits elif prefix="$(git rev-parse --show-prefix 2>/dev/null)" && test -n "$prefix" && head=$(git rev-list --max-count=1 HEAD -- . 2>/dev/null) && @@ -47,12 +51,21 @@ elif prefix="$(git rev-parse --show-prefix 2>/dev/null)" && tip=$(tree_search $head $tree) && test -n "$tip" then - generate_credits $tip || exit + generate_credits $tip "$orig" || exit elif tip="$(git rev-parse --verify HEAD 2>/dev/null)" && test -n "$tip" then - generate_credits $tip || exit + generate_credits $tip "$orig" || exit else echo "error: Cannot locate authorship information." >&2 exit 1 fi + +if test -f "$orig" && cmp -s "$orig" "$CF" +then + : noop +else + rm -f "$CF" && + cat "$orig" >"$CF" +fi + -- 2.30.2