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
160
161
162
|
/*
* 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[] = {
N_("git replace [-f] <object> <replacement>"),
N_("git replace -d <object>..."),
N_("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, *full_hex;
char ref[PATH_MAX];
int had_error = 0;
unsigned char sha1[20];
for (p = argv; *p; p++) {
if (get_sha1(*p, sha1)) {
error("Failed to resolve '%s' as a valid ref.", *p);
had_error = 1;
continue;
}
full_hex = sha1_to_hex(sha1);
snprintf(ref, sizeof(ref), "refs/replace/%s", full_hex);
/* read_ref() may reuse the buffer */
full_hex = ref + strlen("refs/replace/");
if (read_ref(ref, sha1)) {
error("replace ref '%s' not found.", full_hex);
had_error = 1;
continue;
}
if (fn(full_hex, 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_refname_format(ref, 0))
die("'%s' is not a valid ref name.", ref);
if (read_ref(ref, prev))
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_BOOL('l', NULL, &list, N_("list replace refs")),
OPT_BOOL('d', NULL, &delete, N_("delete replace refs")),
OPT_BOOL('f', NULL, &force, N_("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]);
}
|
