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Reorganize rev-parse example

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This commit is contained in:
Ben Straub 2013-10-30 13:07:58 -07:00
parent 784b3abbd5
commit b9d02460f1
1 changed files with 56 additions and 53 deletions
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109
examples/rev-parse.c
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@ -1,17 +1,37 @@
#include <stdio.h>
#include <git2.h>
#include <stdlib.h>
#include <string.h>
/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
static void check(int error, const char *message, const char *arg)
#include "common.h"
/* Forward declarations for helpers */
struct parse_state {
git_repository *repo;
const char *repodir;
const char *spec;
int not;
};
static void parse_opts(struct parse_state *ps, int argc, char *argv[]);
static int parse_revision(struct parse_state *ps);
int main(int argc, char *argv[])
{
if (!error)
return;
if (arg)
fprintf(stderr, "%s %s (%d)\n", message, arg, error);
else
fprintf(stderr, "%s(%d)\n", message, error);
exit(1);
struct parse_state ps = {0};
git_threads_init();
parse_opts(&ps, argc, argv);
check_lg2(parse_revision(&ps), "Parsing", NULL);
git_repository_free(ps.repo);
git_threads_shutdown();
return 0;
}
static void usage(const char *message, const char *arg)
@ -24,13 +44,25 @@ static void usage(const char *message, const char *arg)
exit(1);
}
struct parse_state {
git_repository *repo;
const char *repodir;
int not;
};
static void parse_opts(struct parse_state *ps, int argc, char *argv[])
{
struct args_info args = ARGS_INFO_INIT;
static int parse_revision(struct parse_state *ps, const char *revstr)
for (args.pos=1; args.pos < argc; ++args.pos) {
const char *a = argv[args.pos];
if (a[0] != '-') {
if (ps->spec)
usage("Too many specs", a);
ps->spec = a;
} else if (!strcmp(a, "--not"))
ps->not = !ps->not;
else if (!match_str_arg(&ps->repodir, &args, "--git-dir"))
usage("Cannot handle argument", a);
}
}
static int parse_revision(struct parse_state *ps)
{
git_revspec rs;
char str[GIT_OID_HEXSZ + 1];
@ -38,11 +70,11 @@ static int parse_revision(struct parse_state *ps, const char *revstr)
if (!ps->repo) {
if (!ps->repodir)
ps->repodir = ".";
check(git_repository_open_ext(&ps->repo, ps->repodir, 0, NULL),
check_lg2(git_repository_open_ext(&ps->repo, ps->repodir, 0, NULL),
"Could not open repository from", ps->repodir);
}
check(git_revparse(&rs, ps->repo, revstr), "Could not parse", revstr);
check_lg2(git_revparse(&rs, ps->repo, ps->spec), "Could not parse", ps->spec);
if ((rs.flags & GIT_REVPARSE_SINGLE) != 0) {
git_oid_tostr(str, sizeof(str), git_object_id(rs.from));
@ -56,9 +88,9 @@ static int parse_revision(struct parse_state *ps, const char *revstr)
if ((rs.flags & GIT_REVPARSE_MERGE_BASE) != 0) {
git_oid base;
check(git_merge_base(&base, ps->repo,
git_object_id(rs.from), git_object_id(rs.to)),
"Could not find merge base", revstr);
check_lg2(git_merge_base(&base, ps->repo,
git_object_id(rs.from), git_object_id(rs.to)),
"Could not find merge base", ps->spec);
git_oid_tostr(str, sizeof(str), &base);
printf("%s\n", str);
@ -69,38 +101,9 @@ static int parse_revision(struct parse_state *ps, const char *revstr)
git_object_free(rs.from);
}
else {
check(0, "Invalid results from git_revparse", revstr);
fatal("Invalid results from git_revparse", ps->spec);
}
return 0;
}
int main(int argc, char *argv[])
{
int i;
char *a;
struct parse_state ps;
git_threads_init();
memset(&ps, 0, sizeof(ps));
for (i = 1; i < argc; ++i) {
a = argv[i];
if (a[0] != '-') {
if (parse_revision(&ps, a) != 0)
break;
} else if (!strcmp(a, "--not"))
ps.not = !ps.not;
else if (!strncmp(a, "--git-dir=", strlen("--git-dir=")))
ps.repodir = a + strlen("--git-dir=");
else
usage("Cannot handle argument", a);
}
git_repository_free(ps.repo);
git_threads_shutdown();
return 0;
}