mirror of
https://git.proxmox.com/git/libgit2
synced 2025-05-02 21:34:15 +00:00
107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
#include <stdio.h>
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#include <git2.h>
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#include <stdlib.h>
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#include <string.h>
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static void check(int error, const char *message, const char *arg)
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{
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if (!error)
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return;
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if (arg)
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fprintf(stderr, "%s %s (%d)\n", message, arg, error);
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else
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fprintf(stderr, "%s(%d)\n", message, error);
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exit(1);
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}
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static void usage(const char *message, const char *arg)
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{
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if (message && arg)
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fprintf(stderr, "%s: %s\n", message, arg);
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else if (message)
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fprintf(stderr, "%s\n", message);
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fprintf(stderr, "usage: rev-parse [ --option ] <args>...\n");
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exit(1);
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}
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struct parse_state {
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git_repository *repo;
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const char *repodir;
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int not;
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};
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static int parse_revision(struct parse_state *ps, const char *revstr)
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{
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git_revspec rs;
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char str[GIT_OID_HEXSZ + 1];
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if (!ps->repo) {
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if (!ps->repodir)
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ps->repodir = ".";
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check(git_repository_open_ext(&ps->repo, ps->repodir, 0, NULL),
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"Could not open repository from", ps->repodir);
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}
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check(git_revparse(&rs, ps->repo, revstr), "Could not parse", revstr);
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if ((rs.flags & GIT_REVPARSE_SINGLE) != 0) {
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git_oid_tostr(str, sizeof(str), git_object_id(rs.from));
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printf("%s\n", str);
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git_object_free(rs.from);
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}
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else if ((rs.flags & GIT_REVPARSE_RANGE) != 0) {
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git_oid_tostr(str, sizeof(str), git_object_id(rs.to));
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printf("%s\n", str);
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git_object_free(rs.to);
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if ((rs.flags & GIT_REVPARSE_MERGE_BASE) != 0) {
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git_oid base;
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check(git_merge_base(&base, ps->repo,
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git_object_id(rs.from), git_object_id(rs.to)),
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"Could not find merge base", revstr);
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git_oid_tostr(str, sizeof(str), &base);
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printf("%s\n", str);
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}
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git_oid_tostr(str, sizeof(str), git_object_id(rs.from));
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printf("^%s\n", str);
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git_object_free(rs.from);
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}
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else {
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check(0, "Invalid results from git_revparse", revstr);
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}
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return 0;
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}
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int main(int argc, char *argv[])
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{
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int i;
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char *a;
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struct parse_state ps;
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git_threads_init();
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memset(&ps, 0, sizeof(ps));
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for (i = 1; i < argc; ++i) {
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a = argv[i];
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if (a[0] != '-') {
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if (parse_revision(&ps, a) != 0)
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break;
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} else if (!strcmp(a, "--not"))
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ps.not = !ps.not;
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else if (!strncmp(a, "--git-dir=", strlen("--git-dir=")))
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ps.repodir = a + strlen("--git-dir=");
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else
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usage("Cannot handle argument", a);
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}
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git_repository_free(ps.repo);
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git_threads_shutdown();
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return 0;
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}
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