thodg/libgit2/examples/network/git2.c

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• Hash : b6720018
  Author :
  Date : 2018-01-17T02:25:36
  

  examples: Switch to the nifty argv helpers from common

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• examples/network/git2.c

• #include <stdlib.h>
  #include <stdio.h>
  #include <string.h>
  
  #include "../common.h"
  #include "common.h"
  
  /* This part is not strictly libgit2-dependent, but you can use this
   * as a starting point for a git-like tool */
  
  struct {
  	char *name;
  	git_cb fn;
  } commands[] = {
  	{"ls-remote", ls_remote},
  	{"fetch", fetch},
  	{"clone", do_clone},
  	{"index-pack", index_pack},
  	{ NULL, NULL}
  };
  
  static int run_command(git_cb 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 (giterr_last() == NULL)
  			fprintf(stderr, "Error without message");
  		else
  			fprintf(stderr, "Bad news:\n %s\n", giterr_last()->message);
  	}
  
  	return !!error;
  }
  
  int main(int argc, char **argv)
  {
  	int i;
  	int return_code = 1;
  	int error;
  	git_repository *repo;
  	struct args_info args = ARGS_INFO_INIT;
  	const char *git_dir = NULL;
  
  	if (argc < 2) {
  		fprintf(stderr, "usage: %s <cmd> [repo]\n", argv[0]);
  		exit(EXIT_FAILURE);
  	}
  
  	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 (!strcmp(a, "--")) {
  			/* arg separator */
  			break;
  		}
  	}
  
  	/* Before running the actual command, create an instance of the local
  	 * repository and pass it to the function. */
  
  	error = git_repository_open(&repo, git_dir);
  	if (error < 0)
  		repo = NULL;
  
  	for (i = 0; commands[i].name != NULL; ++i) {
  		if (!strcmp(args.argv[args.pos], commands[i].name)) {
  			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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