archive: fix subst file generation
Before the strbuf conversion, result was a char pointer. The if
statement checked for it being not NULL, which meant that no
"$Format:...$" string had been found and no replacement had to be
made. format_subst() returned NULL in that case -- the caller
then simply kept the original file content, as it was unaffected
by the expansion.
The length of the string being 0 is not the same as the string
being NULL (expansion to an empty string vs. no expansion at all),
so checking result.len != 0 is not a full replacement for the old
NULL check.
However, I doubt the subtle optimization explained above resulted
in a notable speed-up anyway. Simplify the code and add the tail
of the file to the expanded string unconditionally.
[jc: added a test to expose the breakage this fixes]
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/t5000-tar-tree.sh b/t/t5000-tar-tree.sh
index 42e28ab..dca2067 100755
--- a/t/t5000-tar-tree.sh
+++ b/t/t5000-tar-tree.sh
@@ -36,7 +36,8 @@
echo simple textfile >a/a &&
mkdir a/bin &&
cp /bin/sh a/bin &&
- printf "A\$Format:%s\$O" "$SUBSTFORMAT" >a/substfile &&
+ printf "A\$Format:%s\$O" "$SUBSTFORMAT" >a/substfile1 &&
+ printf "A not substituted O" >a/substfile2 &&
ln -s a a/l1 &&
(p=long_path_to_a_file && cd a &&
for depth in 1 2 3 4 5; do mkdir $p && cd $p; done &&
@@ -108,20 +109,22 @@
'diff -r a c/prefix/a'
test_expect_success \
- 'create an archive with a substfile' \
- 'echo substfile export-subst >a/.gitattributes &&
+ 'create an archive with a substfiles' \
+ 'echo "substfile?" export-subst >a/.gitattributes &&
git archive HEAD >f.tar &&
rm a/.gitattributes'
test_expect_success \
- 'extract substfile' \
+ 'extract substfiles' \
'(mkdir f && cd f && $TAR xf -) <f.tar'
test_expect_success \
'validate substfile contents' \
'git log --max-count=1 "--pretty=format:A${SUBSTFORMAT}O" HEAD \
- >f/a/substfile.expected &&
- diff f/a/substfile.expected f/a/substfile'
+ >f/a/substfile1.expected &&
+ diff f/a/substfile1.expected f/a/substfile1 &&
+ diff a/substfile2 f/a/substfile2
+'
test_expect_success \
'git archive --format=zip' \
