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#include "common.h"
/* This part is not strictly libgit2-dependent, but you can use this
* as a starting point for a git-like tool */
typedef int (*git_command_fn)(git_repository *, int , char **);
struct {
char *name;
git_command_fn fn;
char requires_repo;
} commands[] = {
{ "add", lg2_add, 1 },
{ "blame", lg2_blame, 1 },
{ "cat-file", lg2_cat_file, 1 },
{ "checkout", lg2_checkout, 1 },
{ "clone", lg2_clone, 0 },
{ "commit", lg2_commit, 1 },
{ "config", lg2_config, 1 },
{ "describe", lg2_describe, 1 },
{ "diff", lg2_diff, 1 },
{ "fetch", lg2_fetch, 1 },
{ "for-each-ref", lg2_for_each_ref, 1 },
{ "general", lg2_general, 0 },
{ "index-pack", lg2_index_pack, 1 },
{ "init", lg2_init, 0 },
{ "log", lg2_log, 1 },
{ "ls-files", lg2_ls_files, 1 },
{ "ls-remote", lg2_ls_remote, 1 },
{ "merge", lg2_merge, 1 },
{ "push", lg2_push, 1 },
{ "remote", lg2_remote, 1 },
{ "rev-list", lg2_rev_list, 1 },
{ "rev-parse", lg2_rev_parse, 1 },
{ "show-index", lg2_show_index, 0 },
{ "stash", lg2_stash, 1 },
{ "status", lg2_status, 1 },
{ "tag", lg2_tag, 1 },
};
static int run_command(git_command_fn fn, git_repository *repo, struct args_info args)
{
int error;
/* Run the command. If something goes wrong, print the error message to stderr */
error = fn(repo, args.argc - args.pos, &args.argv[args.pos]);
if (error < 0) {
if (git_error_last() == NULL)
fprintf(stderr, "Error without message");
else
fprintf(stderr, "Bad news:\n %s\n", git_error_last()->message);
}
return !!error;
}
static int usage(const char *prog)
{
size_t i;
fprintf(stderr, "usage: %s <cmd>...\n\nAvailable commands:\n\n", prog);
for (i = 0; i < ARRAY_SIZE(commands); i++)
fprintf(stderr, "\t%s\n", commands[i].name);
exit(EXIT_FAILURE);
}
int main(int argc, char **argv)
{
struct args_info args = ARGS_INFO_INIT;
git_repository *repo = NULL;
const char *git_dir = NULL;
int return_code = 1;
size_t i;
if (argc < 2)
usage(argv[0]);
git_libgit2_init();
for (args.pos = 1; args.pos < args.argc; ++args.pos) {
char *a = args.argv[args.pos];
if (a[0] != '-') {
/* non-arg */
break;
} else if (optional_str_arg(&git_dir, &args, "--git-dir", ".git")) {
continue;
} else if (match_arg_separator(&args)) {
break;
}
}
if (args.pos == args.argc)
usage(argv[0]);
if (!git_dir)
git_dir = ".";
for (i = 0; i < ARRAY_SIZE(commands); ++i) {
if (strcmp(args.argv[args.pos], commands[i].name))
continue;
/*
* Before running the actual command, create an instance
* of the local repository and pass it to the function.
* */
if (commands[i].requires_repo) {
check_lg2(git_repository_open_ext(&repo, git_dir, 0, NULL),
"Unable to open repository '%s'", git_dir);
}
return_code = run_command(commands[i].fn, repo, args);
goto shutdown;
}
fprintf(stderr, "Command not found: %s\n", argv[1]);
shutdown:
git_repository_free(repo);
git_libgit2_shutdown();
return return_code;
}
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