thodg/libgit2/examples/rev-list.c

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• Hash : 5961d5ea
  Author :
  Date : 2013-04-15T12:10:18
  

  Clean up example code.

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• examples/rev-list.c

• #include <stdio.h>
  #include <string.h>
  
  #include <git2.h>
  
  static void check_error(int error_code, const char *action)
  {
  	if (!error_code)
  		return;
  
  	const git_error *error = giterr_last();
  	fprintf(stderr, "Error %d %s: %s\n", -error_code, action,
  	        (error && error->message) ? error->message : "???");
  	exit(1);
  }
  
  static int push_commit(git_revwalk *walk, const git_oid *oid, int hide)
  {
  	if (hide)
  		return git_revwalk_hide(walk, oid);
  	else
  		return git_revwalk_push(walk, oid);
  }
  
  static int push_spec(git_repository *repo, git_revwalk *walk, const char *spec, int hide)
  {
  	int error;
  	git_object *obj;
  
  	if ((error = git_revparse_single(&obj, repo, spec)) < 0)
  		return error;
  	error = push_commit(walk, git_object_id(obj), hide);
  	git_object_free(obj);
  	return error;
  }
  
  static int push_range(git_repository *repo, git_revwalk *walk, const char *range, int hide)
  {
  	git_object *left, *right;
  	git_revparse_flag_t flags;
  	int error = 0;
  
  	if ((error = git_revparse(&left, &right, &flags, repo, range)))
  		return error;
  	if (flags & GIT_REVPARSE_MERGE_BASE) {
  		/* TODO: support "<commit>...<commit>" */
  		return GIT_EINVALIDSPEC;
  	}
  
  	if ((error = push_commit(walk, git_object_id(left), !hide)))
  		goto out;
  	error = push_commit(walk, git_object_id(right), hide);
  
    out:
  	git_object_free(left);
  	git_object_free(right);
  	return error;
  }
  
  static int revwalk_parseopts(git_repository *repo, git_revwalk *walk, int nopts, char **opts)
  {
  	int hide, i, error;
  	unsigned int sorting = GIT_SORT_NONE;
  
  	hide = 0;
  	for (i = 0; i < nopts; i++) {
  		if (!strcmp(opts[i], "--topo-order")) {
  			sorting = GIT_SORT_TOPOLOGICAL | (sorting & GIT_SORT_REVERSE);
  			git_revwalk_sorting(walk, sorting);
  		} else if (!strcmp(opts[i], "--date-order")) {
  			sorting = GIT_SORT_TIME | (sorting & GIT_SORT_REVERSE);
  			git_revwalk_sorting(walk, sorting);
  		} else if (!strcmp(opts[i], "--reverse")) {
  			sorting = (sorting & ~GIT_SORT_REVERSE)
  			    | ((sorting & GIT_SORT_REVERSE) ? 0 : GIT_SORT_REVERSE);
  			git_revwalk_sorting(walk, sorting);
  		} else if (!strcmp(opts[i], "--not")) {
  			hide = !hide;
  		} else if (opts[i][0] == '^') {
  			if ((error = push_spec(repo, walk, opts[i] + 1, !hide)))
  				return error;
  		} else if (strstr(opts[i], "..")) {
  			if ((error = push_range(repo, walk, opts[i], hide)))
  				return error;
  		} else {
  			if ((error = push_spec(repo, walk, opts[i], hide)))
  				return error;
  		}
  	}
  
  	return 0;
  }
  
  int main (int argc, char **argv)
  {
  	int error;
  	git_repository *repo;
  	git_revwalk *walk;
  	git_oid oid;
  	char buf[41];
  
  	error = git_repository_open_ext(&repo, ".", 0, NULL);
  	check_error(error, "opening repository");
  
  	error = git_revwalk_new(&walk, repo);
  	check_error(error, "allocating revwalk");
  	error = revwalk_parseopts(repo, walk, argc-1, argv+1);
  	check_error(error, "parsing options");
  
  	while (!git_revwalk_next(&oid, walk)) {
  		git_oid_fmt(buf, &oid);
  		buf[40] = '\0';
  		printf("%s\n", buf);
  	}
  
  	return 0;
  }
  
  

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