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#include <stdio.h>
#include <git2.h>
#include <stdlib.h>
#include <string.h>
static void check(int error, const char *message)
{
if (error) {
fprintf(stderr, "%s (%d)\n", message, error);
exit(1);
}
}
static int check_str_param(const char *arg, const char *pat, const char **val)
{
size_t len = strlen(pat);
if (strncmp(arg, pat, len))
return 0;
*val = (const char *)(arg + len);
return 1;
}
static void usage(const char *message, const char *arg)
{
if (message && arg)
fprintf(stderr, "%s: %s\n", message, arg);
else if (message)
fprintf(stderr, "%s\n", message);
fprintf(stderr, "usage: log [<options>]\n");
exit(1);
}
int main(int argc, char *argv[])
{
int i, j, last_nonoption, force_files = -1;
char *a;
const char *dir = ".";
git_repository *repo;
git_revwalk *walker;
git_revspec revs;
git_threads_init();
for (i = 1, last_nonoption = 1; i < argc; ++i) {
a = argv[i];
if (a[0] != '-' || force_files > 0) {
/* condense args not prefixed with '-' to start of argv */
if (last_nonoption != i)
argv[last_nonoption] = a;
last_nonoption++;
}
else if (!strcmp(a, "--"))
force_files = last_nonoption; /* copy all args as filenames */
else if (!check_str_param(a, "--git-dir=", &dir))
usage("Unknown argument", a);
}
check(git_repository_open_ext(&repo, dir, 0, NULL),
"Could not open repository");
check(git_revwalk_new(&walker, repo),
"Could not create revision walker");
if (force_files < 0)
force_files = last_nonoption;
for (i = 1; i < force_files; ) {
printf("option '%s'\n", argv[i]);
if (!git_revparse(&revs, repo, argv[i])) {
char str[GIT_OID_HEXSZ+1];
if (revs.from) {
git_oid_tostr(str, sizeof(str), git_object_id(revs.from));
printf("revwalk from %s\n", str);
}
if (revs.to) {
git_oid_tostr(str, sizeof(str), git_object_id(revs.to));
printf("revwalk to %s\n", str);
}
/* push / hide / merge-base in revwalker */
++i;
} else {
/* shift array down */
for (a = argv[i], j = i + 1; j < force_files; ++j)
argv[j - 1] = argv[j];
argv[--force_files] = a;
}
}
if (i == 1) {
/* no revs pushed so push HEAD */
printf("revwalk HEAD\n");
}
for (i = force_files; i < last_nonoption; ++i)
printf("file %s\n", argv[i]);
git_repository_free(repo);
git_threads_shutdown();
return 0;
}
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