libmakepkg/strip: don't re-add the same debug source multiple times

It's either a waste of work, or triggers edge cases in some packages
(like coreutils-8.31) where the source file is readonly and cp gets a
permission denied error trying to overwrite it with an identical copy of
itself.

Also while we are at it, make the variable names be something readable,
because I could barely tell what this was doing while editing it.

Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 7 insertions, 4 deletions

diff --git a/scripts/libmakepkg/tidy/strip.sh.in b/scripts/libmakepkg/tidy/strip.sh.in
index 2b6f732d..868b96f3 100644
--- a/scripts/libmakepkg/tidy/strip.sh.in
+++ b/scripts/libmakepkg/tidy/strip.sh.in
@@ -56,11 +56,14 @@ strip_file() {
 		fi
 
 		# copy source files to debug directory
-		local f t
+		local file dest t
 		while IFS= read -r t; do
-			f=${t/${dbgsrcdir}/"$srcdir"}
-			mkdir -p "${dbgsrc/"$dbgsrcdir"/}${t%/*}"
-			cp -- "$f" "${dbgsrc/"$dbgsrcdir"/}$t"
+			file=${t/${dbgsrcdir}/"$srcdir"}
+			dest="${dbgsrc/"$dbgsrcdir"/}$t"
+			if ! [[ -f $dest ]]; then
+				mkdir -p "${dest%/*}"
+				cp -- "$file" "$dest"
+			fi
 		done < <(source_files "$binary")
 
 		# copy debug symbols to debug directory