[PATCH] Make cg-commit work with accented letters.

[Yann Dirson <ydirson@altern.org>]

git-diff-index in default mode has an annoying behaviour wrt filenames
containing non-ascii chars.  As suggested by Pasky, we can use -z
mode, which gives us a much better way of handling all other special
chars.  With associated testcases ensuring it works with simple and
double quotes, backslashes, and spaces as well.

Signed-off-by: Yann Dirson <ydirson@altern.org>
---

 cg-commit               |   10 ++++----
 t/t9900-specialchars.sh |   59 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 64 insertions(+), 5 deletions(-)

diff --git a/cg-commit b/cg-commit
index 8dac57c..9ec8289 100755
--- a/cg-commit
+++ b/cg-commit
@@ -274,8 +274,8 @@ if [ "$ARGS" -o "$_git_relpath" ]; then
 		echo "${_git_relpath}$file" >>"$filter"
 	done
 
-	eval "commitfiles=($(cat "$filter" | path_xargs git-diff-index -r -m HEAD -- | \
-		sed -e 's/"\|\\/\\&/g' -e 's/^\([^	]*\)\(.\)	\(.*\)\(	.*\)*$/"\2 \3"/'))"
+	eval "commitfiles=($(cat "$filter" | path_xargs git-diff-index -z -r -m HEAD -- | \
+		perl -n0e 'if (defined $meta) { s/([\"\\])/\\\1/; print "\"$meta $_\"\n"; $meta=undef } else { $meta = (split(/\s/))[4] }'))"
 	customfiles=1
 
 	[ "$review" ] && cat "$filter" | path_xargs git-diff-index -r -m -p HEAD -- > "$PATCH"
@@ -292,8 +292,8 @@ else
 	if [ ! "$ignorecache" ]; then
 		# \t instead of the tab character itself works only with new
 		# sed versions.
-		eval "commitfiles=($(git-diff-index -r -m HEAD | \
-			sed -e 's/"\|\\/\\&/g' -e 's/^\([^	]*\)\(.\)	\(.*\)\(	.*\)*$/"\2 \3"/'))"
+		eval "commitfiles=($(git-diff-index -z -r -m HEAD | \
+			perl -n0e 'if (defined $meta) { s/([\"\\])/\\\1/; print "\"$meta $_\"\n"; $meta=undef } else { $meta = (split(/\s/))[4] }'))"
 
 		if [ -s "$_git/commit-ignore" ]; then
 			newcommitfiles=()
@@ -439,7 +439,7 @@ __END__
 		exit 1
 	fi
 	if [ ! "$ignorecache" ] && [ ! "$merging" ] && [ ! "$review" ]; then
-		eval "newcommitfiles=($(grep ^CG:F "$LOGMSG2" | sed 's/^CG:F *\(.*\)$/"\1"/'))"
+		eval "newcommitfiles=($(grep ^CG:F "$LOGMSG2" | sed -e 's/\"/\\&/g' -e 's/^CG:F *\(.*\)$/"\1"/'))"
 		if [ ! "$force" ] && [ ! "${newcommitfiles[*]}" ]; then
 			rm "$LOGMSG" "$LOGMSG2"
 			[ "$quiet" ] && exit 0 || die 'Nothing to commit'
diff --git a/t/t9900-specialchars.sh b/t/t9900-specialchars.sh
new file mode 100755
index 0000000..a705052
--- /dev/null
+++ b/t/t9900-specialchars.sh
@@ -0,0 +1,59 @@
+#!/usr/bin/env bash
+#
+# Copyright (c) 2006 Yann Dirson
+#
+test_description="Tests various commands with shell-special chars.
+
+Filenames with embedded spaces, quotes, non-ascii letter, you name it."
+
+. ./test-lib.sh
+
+rm -rf .git
+cg-init -m .
+
+touch "a space"
+test_expect_success 'add file with space' 'cg-add "a space"'
+test_expect_success 'commit file with space' 'cg-commit -m . "a space"'
+
+touch "a'quote"
+test_expect_success 'add file with quote' "cg-add \"a'quote\""
+test_expect_success 'commit file with quote' "cg-commit -m . \"a'quote\""
+
+touch "d\"quote"
+test_expect_success 'add file with accent' 'cg-add "d\"quote"'
+test_expect_success 'commit file with quote' 'cg-commit -m . "d\"quote"'
+
+touch "back\\slash"
+test_expect_success 'add file with accent' 'cg-add "back\\slash"'
+test_expect_success 'commit file with quote' 'cg-commit -m . "back\\slash"'
+
+touch "accént"
+test_expect_success 'add file with accent' "cg-add accént"
+test_expect_success 'commit file with quote' "cg-commit -m . accént"
+
+## same without a file arg to cg-commit
+
+rm -rf * .git
+cg-init -m .
+
+touch "a space"
+test_expect_success 'add file with space' 'cg-add "a space"'
+test_expect_success 'commit file with space' 'cg-commit -m .'
+
+touch "a'quote"
+test_expect_success 'add file with quote' "cg-add \"a'quote\""
+test_expect_success 'commit file with quote' "cg-commit -m ."
+
+touch "d\"quote"
+test_expect_success 'add file with accent' 'cg-add "d\"quote"'
+test_expect_success 'commit file with quote' 'cg-commit -m .'
+
+touch "back\\slash"
+test_expect_success 'add file with accent' 'cg-add "back\\slash"'
+test_expect_success 'commit file with quote' 'cg-commit -m .'
+
+touch "accént"
+test_expect_success 'add file with accent' "cg-add accént"
+test_expect_success 'commit file with quote' "cg-commit -m ."
+
+test_done