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cat-file.c example: deploy helpers, reorg

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This commit is contained in:
Ben Straub 2013-10-30 07:21:36 -07:00
parent dbfd283327
commit 9d83d368fc
1 changed files with 78 additions and 76 deletions
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154
examples/cat-file.c
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@ -1,37 +1,11 @@
#include <stdio.h> /*
#include <git2.h> * Copyright (C) the libgit2 contributors. All rights reserved.
#include <stdlib.h> *
#include <string.h> * 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 git_repository *g_repo; #include "common.h"
static void check(int error, const char *message)
{
if (error) {
fprintf(stderr, "%s (%d)\n", message, error);
exit(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: cat-file (-t | -s | -e | -p) [<options>] <object>\n");
exit(1);
}
static int check_str_param(
const char *arg, const char *pattern, const char **val)
{
size_t len = strlen(pattern);
if (strncmp(arg, pattern, len))
return 0;
*val = (const char *)(arg + len);
return 1;
}
static void print_signature(const char *header, const git_signature *sig) static void print_signature(const char *header, const git_signature *sig)
{ {
@ -123,53 +97,33 @@ enum {
SHOW_PRETTY = 4 SHOW_PRETTY = 4
}; };
/* Forward declarations for option-parsing helper */
struct opts {
const char *dir;
const char *rev;
int action;
int verbose;
};
static void parse_opts(struct opts *o, int argc, char *argv[]);
int main(int argc, char *argv[]) int main(int argc, char *argv[])
{ {
const char *dir = ".", *rev = NULL; git_repository *repo;
int i, action = 0, verbose = 0; struct opts o = { ".", NULL, 0, 0 };
git_object *obj = NULL; git_object *obj = NULL;
char oidstr[GIT_OID_HEXSZ + 1]; char oidstr[GIT_OID_HEXSZ + 1];
git_threads_init(); git_threads_init();
for (i = 1; i < argc; ++i) { parse_opts(&o, argc, argv);
char *a = argv[i];
if (a[0] != '-') { check_lg2(git_repository_open_ext(&repo, o.dir, 0, NULL),
if (rev != NULL) "Could not open repository", NULL);
usage("Only one rev should be provided", NULL); check_lg2(git_revparse_single(&obj, repo, o.rev),
else "Could not resolve", o.rev);
rev = a;
}
else if (!strcmp(a, "-t"))
action = SHOW_TYPE;
else if (!strcmp(a, "-s"))
action = SHOW_SIZE;
else if (!strcmp(a, "-e"))
action = SHOW_NONE;
else if (!strcmp(a, "-p"))
action = SHOW_PRETTY;
else if (!strcmp(a, "-q"))
verbose = 0;
else if (!strcmp(a, "-v"))
verbose = 1;
else if (!strcmp(a, "--help") || !strcmp(a, "-h"))
usage(NULL, NULL);
else if (!check_str_param(a, "--git-dir=", &dir))
usage("Unknown option", a);
}
if (!action || !rev) if (o.verbose) {
usage(NULL, NULL);
check(git_repository_open_ext(&g_repo, dir, 0, NULL),
"Could not open repository");
if (git_revparse_single(&obj, g_repo, rev) < 0) {
fprintf(stderr, "Could not resolve '%s'\n", rev);
exit(1);
}
if (verbose) {
char oidstr[GIT_OID_HEXSZ + 1]; char oidstr[GIT_OID_HEXSZ + 1];
git_oid_tostr(oidstr, sizeof(oidstr), git_object_id(obj)); git_oid_tostr(oidstr, sizeof(oidstr), git_object_id(obj));
@ -177,7 +131,7 @@ int main(int argc, char *argv[])
git_object_type2string(git_object_type(obj)), oidstr); git_object_type2string(git_object_type(obj)), oidstr);
} }
switch (action) { switch (o.action) {
case SHOW_TYPE: case SHOW_TYPE:
printf("%s\n", git_object_type2string(git_object_type(obj))); printf("%s\n", git_object_type2string(git_object_type(obj)));
break; break;
@ -185,9 +139,9 @@ int main(int argc, char *argv[])
git_odb *odb; git_odb *odb;
git_odb_object *odbobj; git_odb_object *odbobj;
check(git_repository_odb(&odb, g_repo), "Could not open ODB"); check_lg2(git_repository_odb(&odb, repo), "Could not open ODB", NULL);
check(git_odb_read(&odbobj, odb, git_object_id(obj)), check_lg2(git_odb_read(&odbobj, odb, git_object_id(obj)),
"Could not find obj"); "Could not find obj", NULL);
printf("%ld\n", (long)git_odb_object_size(odbobj)); printf("%ld\n", (long)git_odb_object_size(odbobj));
@ -221,9 +175,57 @@ int main(int argc, char *argv[])
} }
git_object_free(obj); git_object_free(obj);
git_repository_free(g_repo); git_repository_free(repo);
git_threads_shutdown(); git_threads_shutdown();
return 0; return 0;
} }
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: cat-file (-t | -s | -e | -p) [-v] [-q] "
"[-h|--help] [--git-dir=<dir>] <object>\n");
exit(1);
}
static void parse_opts(struct opts *o, int argc, char *argv[])
{
struct args_info args = ARGS_INFO_INIT;
for (args.pos = 1; args.pos < argc; ++args.pos) {
char *a = argv[args.pos];
if (a[0] != '-') {
if (o->rev != NULL)
usage("Only one rev should be provided", NULL);
else
o->rev = a;
}
else if (!strcmp(a, "-t"))
o->action = SHOW_TYPE;
else if (!strcmp(a, "-s"))
o->action = SHOW_SIZE;
else if (!strcmp(a, "-e"))
o->action = SHOW_NONE;
else if (!strcmp(a, "-p"))
o->action = SHOW_PRETTY;
else if (!strcmp(a, "-q"))
o->verbose = 0;
else if (!strcmp(a, "-v"))
o->verbose = 1;
else if (!strcmp(a, "--help") || !strcmp(a, "-h"))
usage(NULL, NULL);
else if (!match_str_arg(&o->dir, &args, "--git-dir"))
usage("Unknown option", a);
}
if (!o->action || !o->rev)
usage(NULL, NULL);
}