Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tag: v1.6.5.1
Fetching contributors…

Cannot retrieve contributors at this time

file 159 lines (133 sloc) 4.032 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159
/*
* Builtin "git replace"
*
* Copyright (c) 2008 Christian Couder <chriscool@tuxfamily.org>
*
* Based on builtin-tag.c by Kristian Høgsberg <krh@redhat.com>
* and Carlos Rica <jasampler@gmail.com> that was itself based on
* git-tag.sh and mktag.c by Linus Torvalds.
*/

#include "cache.h"
#include "builtin.h"
#include "refs.h"
#include "parse-options.h"

static const char * const git_replace_usage[] = {
"git replace [-f] <object> <replacement>",
"git replace -d <object>...",
"git replace -l [<pattern>]",
NULL
};

static int show_reference(const char *refname, const unsigned char *sha1,
int flag, void *cb_data)
{
const char *pattern = cb_data;

if (!fnmatch(pattern, refname, 0))
printf("%s\n", refname);

return 0;
}

static int list_replace_refs(const char *pattern)
{
if (pattern == NULL)
pattern = "*";

for_each_replace_ref(show_reference, (void *) pattern);

return 0;
}

typedef int (*each_replace_name_fn)(const char *name, const char *ref,
const unsigned char *sha1);

static int for_each_replace_name(const char **argv, each_replace_name_fn fn)
{
const char **p;
char ref[PATH_MAX];
int had_error = 0;
unsigned char sha1[20];

for (p = argv; *p; p++) {
if (snprintf(ref, sizeof(ref), "refs/replace/%s", *p)
>= sizeof(ref)) {
error("replace ref name too long: %.*s...", 50, *p);
had_error = 1;
continue;
}
if (!resolve_ref(ref, sha1, 1, NULL)) {
error("replace ref '%s' not found.", *p);
had_error = 1;
continue;
}
if (fn(*p, ref, sha1))
had_error = 1;
}
return had_error;
}

static int delete_replace_ref(const char *name, const char *ref,
const unsigned char *sha1)
{
if (delete_ref(ref, sha1, 0))
return 1;
printf("Deleted replace ref '%s'\n", name);
return 0;
}

static int replace_object(const char *object_ref, const char *replace_ref,
int force)
{
unsigned char object[20], prev[20], repl[20];
char ref[PATH_MAX];
struct ref_lock *lock;

if (get_sha1(object_ref, object))
die("Failed to resolve '%s' as a valid ref.", object_ref);
if (get_sha1(replace_ref, repl))
die("Failed to resolve '%s' as a valid ref.", replace_ref);

if (snprintf(ref, sizeof(ref),
"refs/replace/%s",
sha1_to_hex(object)) > sizeof(ref) - 1)
die("replace ref name too long: %.*s...", 50, ref);
if (check_ref_format(ref))
die("'%s' is not a valid ref name.", ref);

if (!resolve_ref(ref, prev, 1, NULL))
hashclr(prev);
else if (!force)
die("replace ref '%s' already exists", ref);

lock = lock_any_ref_for_update(ref, prev, 0);
if (!lock)
die("%s: cannot lock the ref", ref);
if (write_ref_sha1(lock, repl, NULL) < 0)
die("%s: cannot update the ref", ref);

return 0;
}

int cmd_replace(int argc, const char **argv, const char *prefix)
{
int list = 0, delete = 0, force = 0;
struct option options[] = {
OPT_BOOLEAN('l', NULL, &list, "list replace refs"),
OPT_BOOLEAN('d', NULL, &delete, "delete replace refs"),
OPT_BOOLEAN('f', NULL, &force, "replace the ref if it exists"),
OPT_END()
};

argc = parse_options(argc, argv, prefix, options, git_replace_usage, 0);

if (list && delete)
usage_msg_opt("-l and -d cannot be used together",
git_replace_usage, options);

if (force && (list || delete))
usage_msg_opt("-f cannot be used with -d or -l",
git_replace_usage, options);

/* Delete refs */
if (delete) {
if (argc < 1)
usage_msg_opt("-d needs at least one argument",
git_replace_usage, options);
return for_each_replace_name(argv, delete_replace_ref);
}

/* Replace object */
if (!list && argc) {
if (argc != 2)
usage_msg_opt("bad number of arguments",
git_replace_usage, options);
return replace_object(argv[0], argv[1], force);
}

/* List refs, even if "list" is not set */
if (argc > 1)
usage_msg_opt("only one pattern can be given with -l",
git_replace_usage, options);
if (force)
usage_msg_opt("-f needs some arguments",
git_replace_usage, options);

return list_replace_refs(argv[0]);
}
Something went wrong with that request. Please try again.