1 files changed, 252 insertions, 0 deletions
diff --git a/builtin/push.c b/builtin/push.c
new file mode 100644
index 0000000000..f4358b9d23
--- /dev/null
+++ b/builtin/push.c
@@ -0,0 +1,252 @@
+/*
+ * "git push"
+ */
+#include "cache.h"
+#include "refs.h"
+#include "run-command.h"
+#include "builtin.h"
+#include "remote.h"
+#include "transport.h"
+#include "parse-options.h"
+
+static const char * const push_usage[] = {
+	"git push [<options>] [<repository> [<refspec>...]]",
+	NULL,
+};
+
+static int thin;
+static int deleterefs;
+static const char *receivepack;
+static int verbosity;
+static int progress;
+
+static const char **refspec;
+static int refspec_nr;
+
+static void add_refspec(const char *ref)
+{
+	int nr = refspec_nr + 1;
+	refspec = xrealloc(refspec, nr * sizeof(char *));
+	refspec[nr-1] = ref;
+	refspec_nr = nr;
+}
+
+static void set_refspecs(const char **refs, int nr)
+{
+	int i;
+	for (i = 0; i < nr; i++) {
+		const char *ref = refs[i];
+		if (!strcmp("tag", ref)) {
+			char *tag;
+			int len;
+			if (nr <= ++i)
+				die("tag shorthand without <tag>");
+			len = strlen(refs[i]) + 11;
+			if (deleterefs) {
+				tag = xmalloc(len+1);
+				strcpy(tag, ":refs/tags/");
+			} else {
+				tag = xmalloc(len);
+				strcpy(tag, "refs/tags/");
+			}
+			strcat(tag, refs[i]);
+			ref = tag;
+		} else if (deleterefs && !strchr(ref, ':')) {
+			char *delref;
+			int len = strlen(ref)+1;
+			delref = xmalloc(len+1);
+			strcpy(delref, ":");
+			strcat(delref, ref);
+			ref = delref;
+		} else if (deleterefs)
+			die("--delete only accepts plain target ref names");
+		add_refspec(ref);
+	}
+}
+
+static void setup_push_tracking(void)
+{
+	struct strbuf refspec = STRBUF_INIT;
+	struct branch *branch = branch_get(NULL);
+	if (!branch)
+		die("You are not currently on a branch.");
+	if (!branch->merge_nr || !branch->merge)
+		die("The current branch %s is not tracking anything.",
+		    branch->name);
+	if (branch->merge_nr != 1)
+		die("The current branch %s is tracking multiple branches, "
+		    "refusing to push.", branch->name);
+	strbuf_addf(&refspec, "%s:%s", branch->name, branch->merge[0]->src);
+	add_refspec(refspec.buf);
+}
+
+static void setup_default_push_refspecs(void)
+{
+	switch (push_default) {
+	default:
+	case PUSH_DEFAULT_MATCHING:
+		add_refspec(":");
+		break;
+
+	case PUSH_DEFAULT_TRACKING:
+		setup_push_tracking();
+		break;
+
+	case PUSH_DEFAULT_CURRENT:
+		add_refspec("HEAD");
+		break;
+
+	case PUSH_DEFAULT_NOTHING:
+		die("You didn't specify any refspecs to push, and "
+		    "push.default is \"nothing\".");
+		break;
+	}
+}
+
+static int push_with_options(struct transport *transport, int flags)
+{
+	int err;
+	int nonfastforward;
+
+	transport_set_verbosity(transport, verbosity, progress);
+
+	if (receivepack)
+		transport_set_option(transport,
+				     TRANS_OPT_RECEIVEPACK, receivepack);
+	if (thin)
+		transport_set_option(transport, TRANS_OPT_THIN, "yes");
+
+	if (verbosity > 0)
+		fprintf(stderr, "Pushing to %s\n", transport->url);
+	err = transport_push(transport, refspec_nr, refspec, flags,
+			     &nonfastforward);
+	if (err != 0)
+		error("failed to push some refs to '%s'", transport->url);
+
+	err |= transport_disconnect(transport);
+
+	if (!err)
+		return 0;
+
+	if (nonfastforward && advice_push_nonfastforward) {
+		fprintf(stderr, "To prevent you from losing history, non-fast-forward updates were rejected\n"
+				"Merge the remote changes before pushing again.  See the 'Note about\n"
+				"fast-forwards' section of 'git push --help' for details.\n");
+	}
+
+	return 1;
+}
+
+static int do_push(const char *repo, int flags)
+{
+	int i, errs;
+	struct remote *remote = remote_get(repo);
+	const char **url;
+	int url_nr;
+
+	if (!remote) {
+		if (repo)
+			die("bad repository '%s'", repo);
+		die("No destination configured to push to.");
+	}
+
+	if (remote->mirror)
+		flags |= (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE);
+
+	if ((flags & TRANSPORT_PUSH_ALL) && refspec) {
+		if (!strcmp(*refspec, "refs/tags/*"))
+			return error("--all and --tags are incompatible");
+		return error("--all can't be combined with refspecs");
+	}
+
+	if ((flags & TRANSPORT_PUSH_MIRROR) && refspec) {
+		if (!strcmp(*refspec, "refs/tags/*"))
+			return error("--mirror and --tags are incompatible");
+		return error("--mirror can't be combined with refspecs");
+	}
+
+	if ((flags & (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) ==
+				(TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) {
+		return error("--all and --mirror are incompatible");
+	}
+
+	if (!refspec && !(flags & TRANSPORT_PUSH_ALL)) {
+		if (remote->push_refspec_nr) {
+			refspec = remote->push_refspec;
+			refspec_nr = remote->push_refspec_nr;
+		} else if (!(flags & TRANSPORT_PUSH_MIRROR))
+			setup_default_push_refspecs();
+	}
+	errs = 0;
+	if (remote->pushurl_nr) {
+		url = remote->pushurl;
+		url_nr = remote->pushurl_nr;
+	} else {
+		url = remote->url;
+		url_nr = remote->url_nr;
+	}
+	if (url_nr) {
+		for (i = 0; i < url_nr; i++) {
+			struct transport *transport =
+				transport_get(remote, url[i]);
+			if (push_with_options(transport, flags))
+				errs++;
+		}
+	} else {
+		struct transport *transport =
+			transport_get(remote, NULL);
+
+		if (push_with_options(transport, flags))
+			errs++;
+	}
+	return !!errs;
+}
+
+int cmd_push(int argc, const char **argv, const char *prefix)
+{
+	int flags = 0;
+	int tags = 0;
+	int rc;
+	const char *repo = NULL;	/* default repository */
+	struct option options[] = {
+		OPT__VERBOSITY(&verbosity),
+		OPT_STRING( 0 , "repo", &repo, "repository", "repository"),
+		OPT_BIT( 0 , "all", &flags, "push all refs", TRANSPORT_PUSH_ALL),
+		OPT_BIT( 0 , "mirror", &flags, "mirror all refs",
+			    (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE)),
+		OPT_BOOLEAN( 0, "delete", &deleterefs, "delete refs"),
+		OPT_BOOLEAN( 0 , "tags", &tags, "push tags (can't be used with --all or --mirror)"),
+		OPT_BIT('n' , "dry-run", &flags, "dry run", TRANSPORT_PUSH_DRY_RUN),
+		OPT_BIT( 0,  "porcelain", &flags, "machine-readable output", TRANSPORT_PUSH_PORCELAIN),
+		OPT_BIT('f', "force", &flags, "force updates", TRANSPORT_PUSH_FORCE),
+		OPT_BOOLEAN( 0 , "thin", &thin, "use thin pack"),
+		OPT_STRING( 0 , "receive-pack", &receivepack, "receive-pack", "receive pack program"),
+		OPT_STRING( 0 , "exec", &receivepack, "receive-pack", "receive pack program"),
+		OPT_BIT('u', "set-upstream", &flags, "set upstream for git pull/status",
+			TRANSPORT_PUSH_SET_UPSTREAM),
+		OPT_BOOLEAN(0, "progress", &progress, "force progress reporting"),
+		OPT_END()
+	};
+
+	git_config(git_default_config, NULL);
+	argc = parse_options(argc, argv, prefix, options, push_usage, 0);
+
+	if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL | TRANSPORT_PUSH_MIRROR))))
+		die("--delete is incompatible with --all, --mirror and --tags");
+	if (deleterefs && argc < 2)
+		die("--delete doesn't make sense without any refs");
+
+	if (tags)
+		add_refspec("refs/tags/*");
+
+	if (argc > 0) {
+		repo = argv[0];
+		set_refspecs(argv + 1, argc - 1);
+	}
+
+	rc = do_push(repo, flags);
+	if (rc == -1)
+		usage_with_options(push_usage, options);
+	else
+		return rc;
+}