Re: [PATCH v6 6/7] git-reflog: add create and exists functions

These are necessary because alternate ref backends might store reflogs
somewhere other than .git/logs.  Code that now directly manipulates
.git/logs should instead go through git-reflog.

In a moment, we will use these functions to make git stash work with
alternate ref backends.

Signed-off-by: David Turner <redacted>
---

diff --git a/builtin/reflog.c b/builtin/reflog.c
index c2eb8ff..3080865 100644
--- a/builtin/reflog.c
+++ b/builtin/reflog.c

@@ -13,6 +13,10 @@ static const char reflog_expire_usage[] =
+static int cmd_reflog_create(int argc, const char **argv, const char *prefix)
+{
+       int i, status = 0, start = 0;
+       struct strbuf err = STRBUF_INIT;
+
+       for (i = 1; i < argc; i++) {
+               const char *arg = argv[i];
+               if (!strcmp(arg, "--")) {
+                       i++;
+                       break;
+               }
+               else if (arg[0] == '-')
+                       usage(reflog_create_usage);
+               else
+                       break;
+       }
+
+       start = i;
+
+       if (argc - start < 1)
+               return error("Nothing to create?");
+
+       for (i = start; i < argc; i++) {
+               if (check_refname_format(argv[i], REFNAME_ALLOW_ONELEVEL))
+                       die("invalid ref format: %s", argv[i]);
+       }
+       for (i = start; i < argc; i++) {
+               if (safe_create_reflog(argv[i], &err, 1)) {
+                       error("could not create reflog %s: %s", argv[i],
+                             err.buf);
+                       status = 1;
+                       strbuf_release(&err);

+               }
+       }
+       return status;
+}