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#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_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;
}
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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