[PATCH] Fix invocation of external git commands with arguments with spaces.

[Johannes Sixt <j.sixt@viscovery.net>]

If an external git command (not a shell script) was invoked with arguments
that contain spaces, these arguments would be split into separate
arguments. They must be quoted. This also affected installations where
$prefix contained a space, as in "C:\Program Files\GIT". Both errors can
be triggered by invoking

     git hash-object "a b"

where "a b" is an existing file.
---
Johannes Sixt schrieb:
> BTW, I think the fix is incomplete anyway: We quote only argv[0], but 
> actually all of argv should be quoted. Will test.

Here is the proper fix.

Yes, this leaks memory on the error path. We can clean that up later...

-- Hannes

  compat/mingw.c |    7 ++++++-
  1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/compat/mingw.c b/compat/mingw.c
index 8bb0dba..2554f19 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -405,7 +405,12 @@ void mingw_execve()
  {
  	/* check if git_command is a shell script */
  	if (!try_shell_exec(cmd, argv, env)) {
-		int ret = spawnve(_P_WAIT, cmd, argv, env);
+		const char **qargv;
+		int n;
+		for (n = 0; argv[n];) n++;
+		qargv = xmalloc((n+1)*sizeof(char*));
+		quote_argv(qargv, argv);
+		int ret = spawnve(_P_WAIT, cmd, qargv, env);
  		if (ret != -1)
  			exit(ret);
  	}
-- 
1.5.3.717.g01fc-dirty