[GSoC][PATCH 2/3] credential-cache.c: Make git use XDG_CACHE_HOME for credentials

[Devin Lehmacher]

git-credential-cache will now use the socket
$XDG_CACHE_HOME/git/credential/socket if there is not already a socket
at ~/.git-credential-cache/socket. This ensures that if another process
already created a socket at the old location it will be used over the
new one if it exists.

Signed-off-by: Devin Lehmacher <lehma...@gmail.com>
---
 credential-cache.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/credential-cache.c b/credential-cache.c
index cc8a6ee19..75c917de7 100644
--- a/credential-cache.c
+++ b/credential-cache.c
@@ -83,6 +83,19 @@ static void do_cache(const char *socket, const char *action, 
int timeout,
        strbuf_release(&buf);
 }
 
+static char* get_socket_path(void) {
+       char *home_socket;
+
+       home_socket = expand_user_path("~/.git_credential_cache/socket");
+       if (home_socket)
+               if (file_exists(home_socket))
+                       return home_socket;
+               else
+                       free(home_socket);
+
+       return xdg_cache_home("credential/socket");
+}
+
 int cmd_main(int argc, const char **argv)
 {
        char *socket_path = NULL;
@@ -106,7 +119,7 @@ int cmd_main(int argc, const char **argv)
        op = argv[0];
 
        if (!socket_path)
-               socket_path = 
expand_user_path("~/.git-credential-cache/socket");
+               socket_path = get_socket_path();
        if (!socket_path)
                die("unable to find a suitable socket path; use --socket");
 
-- 
2.11.0