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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/*
* Licensed under a two-clause BSD-style license.
* See LICENSE for details.
*/
#include "git-compat-util.h"
#include "strbuf.h"
#include "quote.h"
#include "fast_export.h"
#include "line_buffer.h"
#include "repo_tree.h"
#include "strbuf.h"
#define MAX_GITSVN_LINE_LEN 4096
static uint32_t first_commit_done;
static struct line_buffer report_buffer = LINE_BUFFER_INIT;
void fast_export_init(int fd)
{
if (buffer_fdinit(&report_buffer, fd))
die_errno("cannot read from file descriptor %d", fd);
}
void fast_export_deinit(void)
{
if (buffer_deinit(&report_buffer))
die_errno("error closing fast-import feedback stream");
}
void fast_export_reset(void)
{
buffer_reset(&report_buffer);
}
void fast_export_delete(const char *path)
{
putchar('D');
putchar(' ');
quote_c_style(path, NULL, stdout, 0);
putchar('\n');
}
static void fast_export_truncate(const char *path, uint32_t mode)
{
fast_export_modify(path, mode, "inline");
printf("data 0\n\n");
}
void fast_export_modify(const char *path, uint32_t mode, const char *dataref)
{
/* Mode must be 100644, 100755, 120000, or 160000. */
if (!dataref) {
fast_export_truncate(path, mode);
return;
}
printf("M %06"PRIo32" %s ", mode, dataref);
quote_c_style(path, NULL, stdout, 0);
putchar('\n');
}
static char gitsvnline[MAX_GITSVN_LINE_LEN];
void fast_export_begin_commit(uint32_t revision, const char *author,
const struct strbuf *log,
const char *uuid, const char *url,
unsigned long timestamp)
{
static const struct strbuf empty = STRBUF_INIT;
if (!log)
log = ∅
if (*uuid && *url) {
snprintf(gitsvnline, MAX_GITSVN_LINE_LEN,
"\n\ngit-svn-id: %s@%"PRIu32" %s\n",
url, revision, uuid);
} else {
*gitsvnline = '\0';
}
printf("commit refs/heads/master\n");
printf("mark :%"PRIu32"\n", revision);
printf("committer %s <%s@%s> %ld +0000\n",
*author ? author : "nobody",
*author ? author : "nobody",
*uuid ? uuid : "local", timestamp);
printf("data %"PRIuMAX"\n",
(uintmax_t) (log->len + strlen(gitsvnline)));
fwrite(log->buf, log->len, 1, stdout);
printf("%s\n", gitsvnline);
if (!first_commit_done) {
if (revision > 1)
printf("from :%"PRIu32"\n", revision - 1);
first_commit_done = 1;
}
}
void fast_export_end_commit(uint32_t revision)
{
printf("progress Imported commit %"PRIu32".\n\n", revision);
}
static void ls_from_rev(uint32_t rev, const char *path)
{
/* ls :5 path/to/old/file */
printf("ls :%"PRIu32" ", rev);
quote_c_style(path, NULL, stdout, 0);
putchar('\n');
fflush(stdout);
}
static void ls_from_active_commit(const char *path)
{
/* ls "path/to/file" */
printf("ls \"");
quote_c_style(path, NULL, stdout, 1);
printf("\"\n");
fflush(stdout);
}
static const char *get_response_line(void)
{
const char *line = buffer_read_line(&report_buffer);
if (line)
return line;
if (buffer_ferror(&report_buffer))
die_errno("error reading from fast-import");
die("unexpected end of fast-import feedback");
}
static void die_short_read(struct line_buffer *input)
{
if (buffer_ferror(input))
die_errno("error reading dump file");
die("invalid dump: unexpected end of file");
}
void fast_export_data(uint32_t mode, uint32_t len, struct line_buffer *input)
{
if (mode == REPO_MODE_LNK) {
/* svn symlink blobs start with "link " */
len -= 5;
if (buffer_skip_bytes(input, 5) != 5)
die_short_read(input);
}
printf("data %"PRIu32"\n", len);
if (buffer_copy_bytes(input, len) != len)
die_short_read(input);
fputc('\n', stdout);
}
static int parse_ls_response(const char *response, uint32_t *mode,
struct strbuf *dataref)
{
const char *tab;
const char *response_end;
assert(response);
response_end = response + strlen(response);
if (*response == 'm') { /* Missing. */
errno = ENOENT;
return -1;
}
/* Mode. */
if (response_end - response < strlen("100644") ||
response[strlen("100644")] != ' ')
die("invalid ls response: missing mode: %s", response);
*mode = 0;
for (; *response != ' '; response++) {
char ch = *response;
if (ch < '0' || ch > '7')
die("invalid ls response: mode is not octal: %s", response);
*mode *= 8;
*mode += ch - '0';
}
/* ' blob ' or ' tree ' */
if (response_end - response < strlen(" blob ") ||
(response[1] != 'b' && response[1] != 't'))
die("unexpected ls response: not a tree or blob: %s", response);
response += strlen(" blob ");
/* Dataref. */
tab = memchr(response, '\t', response_end - response);
if (!tab)
die("invalid ls response: missing tab: %s", response);
strbuf_add(dataref, response, tab - response);
return 0;
}
int fast_export_ls_rev(uint32_t rev, const char *path,
uint32_t *mode, struct strbuf *dataref)
{
ls_from_rev(rev, path);
return parse_ls_response(get_response_line(), mode, dataref);
}
int fast_export_ls(const char *path, uint32_t *mode, struct strbuf *dataref)
{
ls_from_active_commit(path);
return parse_ls_response(get_response_line(), mode, dataref);
}
|
