git-p4: Unset P4DIFF environment variable when using 'p4 -du diff'

diff --git a/builtin-update-ref.c b/builtin-update-ref.c
index 8339cf19e2b68a19e88c1a014c52672bc6f0c7b5..e90737c350402fec8937a9e343485e1c71411f55 100644 (file)
--- a/builtin-update-ref.c
+++ b/builtin-update-ref.c
@@ -1,60 +1,44 @@
 #include "cache.h"
 #include "refs.h"
 #include "builtin.h"
+#include "parse-options.h"
 
-static const char git_update_ref_usage[] =
-"git-update-ref [-m <reason>] (-d <refname> <value> | [--no-deref] <refname> <value> [<oldval>])";
+static const char * const git_update_ref_usage[] = {
+       "git-update-ref [options] -d <refname> <oldval>",
+       "git-update-ref [options]    <refname> <newval> [<oldval>]",
+       NULL
+};
 
 int cmd_update_ref(int argc, const char **argv, const char *prefix)
 {
-       const char *refname=NULL, *value=NULL, *oldval=NULL, *msg=NULL;
-       struct ref_lock *lock;
+       const char *refname, *value, *oldval, *msg=NULL;
        unsigned char sha1[20], oldsha1[20];
-       int i, delete, ref_flags;
+       int delete = 0, no_deref = 0;
+       struct option options[] = {
+               OPT_STRING( 'm', NULL, &msg, "reason", "reason of the update"),
+               OPT_BOOLEAN('d', NULL, &delete, "deletes the reference"),
+               OPT_BOOLEAN( 0 , "no-deref", &no_deref,
+                                       "update <refname> not the one it points to"),
+               OPT_END(),
+       };
 
-       delete = 0;
-       ref_flags = 0;
        git_config(git_default_config);
+       argc = parse_options(argc, argv, options, git_update_ref_usage, 0);
+       if (msg && !*msg)
+               die("Refusing to perform update with empty message.");
 
-       for (i = 1; i < argc; i++) {
-               if (!strcmp("-m", argv[i])) {
-                       if (i+1 >= argc)
-                               usage(git_update_ref_usage);
-                       msg = argv[++i];
-                       if (!*msg)
-                               die("Refusing to perform update with empty message.");
-                       continue;
-               }
-               if (!strcmp("-d", argv[i])) {
-                       delete = 1;
-                       continue;
-               }
-               if (!strcmp("--no-deref", argv[i])) {
-                       ref_flags |= REF_NODEREF;
-                       continue;
-               }
-               if (!refname) {
-                       refname = argv[i];
-                       continue;
-               }
-               if (!value) {
-                       value = argv[i];
-                       continue;
-               }
-               if (!oldval) {
-                       oldval = argv[i];
-                       continue;
-               }
-       }
-       if (!refname || !value)
-               usage(git_update_ref_usage);
+       if (argc < 2 || argc > 3)
+               usage_with_options(git_update_ref_usage, options);
+       refname = argv[0];
+       value   = argv[1];
+       oldval  = argv[2];
 
        if (get_sha1(value, sha1))
                die("%s: not a valid SHA1", value);
 
        if (delete) {
                if (oldval)
-                       usage(git_update_ref_usage);
+                       usage_with_options(git_update_ref_usage, options);
                return delete_ref(refname, sha1);
        }
 
@@ -62,10 +46,6 @@ int cmd_update_ref(int argc, const char **argv, const char *prefix)
        if (oldval && *oldval && get_sha1(oldval, oldsha1))
                die("%s: not a valid old SHA1", oldval);
 
-       lock = lock_any_ref_for_update(refname, oldval ? oldsha1 : NULL, ref_flags);
-       if (!lock)
-               die("%s: cannot lock the ref", refname);
-       if (write_ref_sha1(lock, sha1, msg) < 0)
-               die("%s: cannot update the ref", refname);
-       return 0;
+       return update_ref(msg, refname, sha1, oldval ? oldsha1 : NULL,
+                         no_deref ? REF_NODEREF : 0, DIE_ON_ERR);
 }