[PATCH] launch_editor(): allow spaces in the filename

[Johannes Schindelin <Johannes.Schindelin@xxxxxx>]

For some reason, the construct

	sh -c "$0 \"$@\"" <editor> <file>

does not pick up quotes in <editor> as expected.  So replace $0 with
<editor>.

This fixes

	git config core.editor "c:/Program Files/What/Ever.exe"

Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---

	Incidentally, this fixes issue 78 in msysGit.

	Zeng (is this the correct way to address you?), Evan, please test.

 builtin-tag.c     |    6 +++++-
 t/t7005-editor.sh |   28 ++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+), 1 deletions(-)

diff --git a/builtin-tag.c b/builtin-tag.c
index 28c36fd..8dd959f 100644
--- a/builtin-tag.c
+++ b/builtin-tag.c
@@ -50,12 +50,15 @@ void launch_editor(const char *path, struct strbuf *buffer, const char *const *e
 		size_t len = strlen(editor);
 		int i = 0;
 		const char *args[6];
+		struct strbuf arg0;
 
+		strbuf_init(&arg0, 0);
 		if (strcspn(editor, "$ \t'") != len) {
 			/* there are specials */
+			strbuf_addf(&arg0, "%s \"$@\"", editor);
 			args[i++] = "sh";
 			args[i++] = "-c";
-			args[i++] = "$0 \"$@\"";
+			args[i++] = arg0.buf;
 		}
 		args[i++] = editor;
 		args[i++] = path;
@@ -63,6 +66,7 @@ void launch_editor(const char *path, struct strbuf *buffer, const char *const *e
 
 		if (run_command_v_opt_cd_env(args, 0, NULL, env))
 			die("There was a problem with the editor %s.", editor);
+		strbuf_release(&arg0);
 	}
 
 	if (!buffer)
diff --git a/t/t7005-editor.sh b/t/t7005-editor.sh
index c1cec55..5395b74 100755
--- a/t/t7005-editor.sh
+++ b/t/t7005-editor.sh
@@ -89,6 +89,34 @@ do
 	'
 done
 
+test_expect_success 'editor with a space' '
+
+	if echo "echo space > \"\$1\"" > "e space.sh"
+	then
+		chmod a+x "e space.sh" &&
+		GIT_EDITOR="./e\ space.sh" \
+			git --exec-path=. commit --amend &&
+		test space = "$(git show -s --pretty=format:%s)"
+	else
+		say "Skipping; FS does not support spaces in filenames"
+	fi
+
+'
+
+unset GIT_EDITOR
+test_expect_success 'core.editor with a space' '
+
+	if test -f "e space.sh"
+	then
+		git config core.editor \"./e\ space.sh\" &&
+		git --exec-path=. commit --amend &&
+		test space = "$(git show -s --pretty=format:%s)"
+	else
+		say "Skipping; FS does not support spaces in filenames"
+	fi
+
+'
+
 TERM="$OLD_TERM"
 
 test_done
-- 
1.5.4.4.643.g7cb9b.dirty

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