thodg/libgit2/examples/rev-list.c

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• Hash : 799e22ea
  Author :
  Date : 2014-10-23T17:34:41
  

  Rename git_threads_ to git_libgit2_ This describes their purpose better, as we now initialize ssl and some other global stuff in there. Calling the init function is not something which has been optional for a while now.

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• examples/rev-list.c

• /*
   * libgit2 "rev-list" example - shows how to transform a rev-spec into a list
   * of commit ids
   *
   * 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"
  
  static int revwalk_parseopts(git_repository *repo, git_revwalk *walk, int nopts, char **opts);
  
  int main (int argc, char **argv)
  {
  	git_repository *repo;
  	git_revwalk *walk;
  	git_oid oid;
  	char buf[GIT_OID_HEXSZ+1];
  
  	git_libgit2_init();
  
  	check_lg2(git_repository_open_ext(&repo, ".", 0, NULL), "opening repository", NULL);
  	check_lg2(git_revwalk_new(&walk, repo), "allocating revwalk", NULL);
  	check_lg2(revwalk_parseopts(repo, walk, argc-1, argv+1), "parsing options", NULL);
  
  	while (!git_revwalk_next(&oid, walk)) {
  		git_oid_fmt(buf, &oid);
  		buf[GIT_OID_HEXSZ] = '\0';
  		printf("%s\n", buf);
  	}
  
  	git_libgit2_shutdown();
  	return 0;
  }
  
  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_revspec revspec;
  	int error = 0;
  
  	if ((error = git_revparse(&revspec, repo, range)))
  		return error;
  
  	if (revspec.flags & GIT_REVPARSE_MERGE_BASE) {
  		/* TODO: support "<commit>...<commit>" */
  		return GIT_EINVALIDSPEC;
  	}
  
  	if ((error = push_commit(walk, git_object_id(revspec.from), !hide)))
  		goto out;
  
  	error = push_commit(walk, git_object_id(revspec.to), hide);
  
  out:
  	git_object_free(revspec.from);
  	git_object_free(revspec.to);
  	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;
  }
  
  

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