Re: [PATCH] git-am: add --directory=<dir> option

Stephan Beyer [off-list ref] writes:

Do I have a thinko or should it be this:

+		sed -e 's/'\''/'\''\\\'\'''\''/g' -e 's/.*/ '\''&'\''/'
		                   ^^
			(added for escaping ' outside single quotes)

Almost.

Certainly my original was bad; shell unquotes to "s/'/'\''/g", but that
backslash is not protected from further interpretation by sed, which
happily turns backslash-single quote into a single quote, which I forgot.

You feed "s/'/'\\\''/g" which correctly protects one backslash from sed by
doubling it, but it has one unnecessary extra backslash.  The extra one
does not hurt because the backslash + single quote is eaten by sed to
produce a single quote, but it is not quite right.

We should be feeding sed with "s/'/'\\''/g", so you need to add one
backslash to mine.

Have you forgotten to add the files prefixed with "am-test-5-" or is this
patch based on another one?

The one I actually queued is b47dfe9 (git-am: add --directory=<dir>
option, 2009-01-11) and it does include these test vectors.  My bad.

This patch is relative to b47dfe9.

-- >8 --
Fix git-am shell quoting

Noticed by Stephan Beyer; the new test is mine.

Signed-off-by: Junio C Hamano <redacted>
---
 git-am.sh             |    2 +-
 t/t4252-am-options.sh |    8 ++++++++
 2 files changed, 9 insertions(+), 1 deletions(-)

diff --git c/git-am.sh w/git-am.sh
index 7e6329b..4beb12d 100755
--- c/git-am.sh
+++ w/git-am.sh

@@ -38,7 +38,7 @@ sq () {
 	for sqarg
 	do
 		printf "%s" "$sqarg" |
-		sed -e 's/'\''/'\''\'\'''\''/g' -e 's/.*/ '\''&'\''/'
+		sed -e 's/'\''/'\''\\'\'''\''/g' -e 's/.*/ '\''&'\''/'
 	done
 }
 

diff --git c/t/t4252-am-options.sh w/t/t4252-am-options.sh
index e91a6da..5fdd188 100755
--- c/t/t4252-am-options.sh
+++ w/t/t4252-am-options.sh

@@ -58,4 +58,12 @@ test_expect_success 'interrupted am --directory="frotz nitfol"' '
 	grep One "frotz nitfol/file-5"
 '
 
+test_expect_success 'apply to a funny path' '
+	with_sq="with'\''sq"
+	rm -fr .git/rebase-apply &&
+	git reset --hard initial &&
+	git am --directory="$with_sq" "$tm"/am-test-5-2 &&
+	test -f "$with_sq/file-5"
+'
+
 test_done