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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;

}