examples: add remote example.
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diff --git a/examples/.gitignore b/examples/.gitignore
index 083c883..fb96d79 100644
--- a/examples/.gitignore
+++ b/examples/.gitignore
@@ -7,6 +7,7 @@ cat-file
init
log
rev-parse
+remote
status
tag
for-each-ref
diff --git a/examples/Makefile b/examples/Makefile
index 11b0199..01f8592 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -3,7 +3,7 @@
CC = gcc
CFLAGS = -g -I../include -I../src -Wall -Wextra -Wmissing-prototypes -Wno-missing-field-initializers
LFLAGS = -L../build -lgit2 -lz
-APPS = general showindex diff rev-list cat-file status log rev-parse init blame tag
+APPS = general showindex diff rev-list cat-file status log rev-parse init blame tag remote
APPS += for-each-ref
all: $(APPS)
diff --git a/examples/remote.c b/examples/remote.c
new file mode 100644
index 0000000..b756b56
--- /dev/null
+++ b/examples/remote.c
@@ -0,0 +1,277 @@
+/*
+ * libgit2 "remote" example - shows how to modify remotes for a repo
+ *
+ * Written by the libgit2 contributors
+ *
+ * To the extent possible under law, the author(s) have dedicated all copyright
+ * and related and neighboring rights to this software to the public domain
+ * worldwide. This software is distributed without any warranty.
+ *
+ * You should have received a copy of the CC0 Public Domain Dedication along
+ * with this software. If not, see
+ * <http://creativecommons.org/publicdomain/zero/1.0/>.
+ */
+
+#include "common.h"
+
+/**
+ * This is a sample program that is similar to "git remote". See the
+ * documentation for that (try "git help remote") to understand what this
+ * program is emulating.
+ *
+ * This demonstrates using the libgit2 APIs to modify remotes of a repository.
+ */
+
+enum subcmd {
+ subcmd_add,
+ subcmd_remove,
+ subcmd_rename,
+ subcmd_seturl,
+ subcmd_show,
+};
+
+struct opts {
+ enum subcmd cmd;
+
+ /* for command-specific args */
+ int argc;
+ char **argv;
+};
+
+static int cmd_add(git_repository *repo, struct opts *o);
+static int cmd_remove(git_repository *repo, struct opts *o);
+static int cmd_rename(git_repository *repo, struct opts *o);
+static int cmd_seturl(git_repository *repo, struct opts *o);
+static int cmd_show(git_repository *repo, struct opts *o);
+
+static void parse_subcmd(
+ struct opts *opt, int argc, char **argv);
+static void usage(const char *msg, const char *arg);
+
+int main(int argc, char *argv[])
+{
+ int retval = 0;
+ struct opts opt = {0};
+ git_buf buf = GIT_BUF_INIT_CONST(NULL, 0);
+ git_repository *repo = NULL;
+
+ parse_subcmd(&opt, argc, argv);
+
+ git_libgit2_init();
+
+ check_lg2(git_repository_discover(&buf, ".", 0, NULL),
+ "Could not find repository", NULL);
+
+ check_lg2(git_repository_open(&repo, buf.ptr),
+ "Could not open repository", NULL);
+ git_buf_free(&buf);
+
+ switch (opt.cmd)
+ {
+ case subcmd_add:
+ retval = cmd_add(repo, &opt);
+ break;
+ case subcmd_remove:
+ retval = cmd_remove(repo, &opt);
+ break;
+ case subcmd_rename:
+ retval = cmd_rename(repo, &opt);
+ break;
+ case subcmd_seturl:
+ retval = cmd_seturl(repo, &opt);
+ break;
+ case subcmd_show:
+ retval = cmd_show(repo, &opt);
+ break;
+ }
+
+ git_libgit2_shutdown();
+
+ return retval;
+}
+
+static int cmd_add(git_repository *repo, struct opts *o)
+{
+ char *name, *url;
+ git_remote *remote = {0};
+
+ if (o->argc != 2)
+ usage("you need to specify a name and URL", NULL);
+
+ name = o->argv[0];
+ url = o->argv[1];
+
+ check_lg2(git_remote_create(&remote, repo, name, url),
+ "could not create remote", NULL);
+
+ return 0;
+}
+
+static int cmd_remove(git_repository *repo, struct opts *o)
+{
+ char *name;
+
+ if (o->argc != 1)
+ usage("you need to specify a name", NULL);
+
+ name = o->argv[0];
+
+ check_lg2(git_remote_delete(repo, name),
+ "could not delete remote", name);
+
+ return 0;
+}
+
+static int cmd_rename(git_repository *repo, struct opts *o)
+{
+ int i, retval;
+ char *old, *new;
+ git_strarray problems = {0};
+
+ if (o->argc != 2)
+ usage("you need to specify old and new remote name", NULL);
+
+ old = o->argv[0];
+ new = o->argv[1];
+
+ retval = git_remote_rename(&problems, repo, old, new);
+ if (!retval)
+ return 0;
+
+ for (i = 0; i < (int) problems.count; i++) {
+ puts(problems.strings[0]);
+ }
+
+ git_strarray_free(&problems);
+
+ return retval;
+}
+
+static int cmd_seturl(git_repository *repo, struct opts *o)
+{
+ int i, retval, push = 0;
+ char *name = NULL, *url = NULL;
+ git_remote *remote;
+
+ for (i = 0; i < o->argc; i++) {
+ char *arg = o->argv[i];
+
+ if (!strcmp(arg, "--push")) {
+ push = 1;
+ } else if (arg[0] != '-' && name == NULL) {
+ name = arg;
+ } else if (arg[0] != '-' && url == NULL) {
+ url = arg;
+ } else {
+ usage("invalid argument to set-url", arg);
+ }
+ }
+
+ if (name == NULL || url == NULL)
+ usage("you need to specify remote and the new URL", NULL);
+
+ check_lg2(git_remote_lookup(&remote, repo, name),
+ "could not look up remote", name);
+
+ if (push)
+ retval = git_remote_set_pushurl(remote, url);
+ else
+ retval = git_remote_set_url(remote, url);
+ check_lg2(retval, "could not set URL", url);
+
+ check_lg2(git_remote_save(remote),
+ "could not save remote", NULL);
+
+ git_remote_free(remote);
+
+ return 0;
+}
+
+static int cmd_show(git_repository *repo, struct opts *o)
+{
+ int i;
+ const char *arg, *name, *fetch, *push;
+ int verbose = 0;
+ git_strarray remotes = {0};
+ git_remote *remote = {0};
+
+ for (i = 0; i < o->argc; i++) {
+ arg = o->argv[i];
+
+ if (!strcmp(arg, "-v") || !strcmp(arg, "--verbose")) {
+ verbose = 1;
+ }
+ }
+
+ check_lg2(git_remote_list(&remotes, repo),
+ "could not retrieve remotes", NULL);
+
+ for (i = 0; i < (int) remotes.count; i++) {
+ name = remotes.strings[i];
+ if (!verbose) {
+ puts(name);
+ continue;
+ }
+
+ check_lg2(git_remote_lookup(&remote, repo, name),
+ "could not look up remote", name);
+
+ fetch = git_remote_url(remote);
+ if (fetch)
+ printf("%s\t%s (fetch)\n", name, fetch);
+ push = git_remote_pushurl(remote);
+ /* use fetch URL if no distinct push URL has been set */
+ push = push ? push : fetch;
+ if (push)
+ printf("%s\t%s (push)\n", name, push);
+
+ git_remote_free(remote);
+ }
+
+ git_strarray_free(&remotes);
+
+ return 0;
+}
+
+static void parse_subcmd(
+ struct opts *opt, int argc, char **argv)
+{
+ char *arg = argv[1];
+ enum subcmd cmd = 0;
+
+ if (argc < 2)
+ usage("no command specified", NULL);
+
+ if (!strcmp(arg, "add")) {
+ cmd = subcmd_add;
+ } else if (!strcmp(arg, "remove")) {
+ cmd = subcmd_remove;
+ } else if (!strcmp(arg, "rename")) {
+ cmd = subcmd_rename;
+ } else if (!strcmp(arg, "set-url")) {
+ cmd = subcmd_seturl;
+ } else if (!strcmp(arg, "show")) {
+ cmd = subcmd_show;
+ } else {
+ usage("command is not valid", arg);
+ }
+ opt->cmd = cmd;
+
+ opt->argc = argc - 2; /* executable and subcommand are removed */
+ opt->argv = argv + 2;
+}
+
+static void usage(const char *msg, const char *arg)
+{
+ fputs("usage: remote add <name> <url>\n", stderr);
+ fputs(" remote remove <name>\n", stderr);
+ fputs(" remote rename <old> <new>\n", stderr);
+ fputs(" remote set-url [--push] <name> <newurl>\n", stderr);
+ fputs(" remote show [-v|--verbose]\n", stderr);
+
+ if (msg && !arg)
+ fprintf(stderr, "\n%s\n", msg);
+ else if (msg && arg)
+ fprintf(stderr, "\n%s: %s\n", msg, arg);
+ exit(1);
+}