]>
Commit | Line | Data |
---|---|---|
68f64ff8 FA |
1 | #include "cache.h" |
2 | #include "remote.h" | |
3 | #include "strbuf.h" | |
4 | #include "url.h" | |
5 | #include "exec_cmd.h" | |
6 | #include "run-command.h" | |
7 | #include "vcs-svn/svndump.h" | |
8 | #include "notes.h" | |
9 | #include "argv-array.h" | |
10 | ||
11 | static const char *url; | |
f6529de9 | 12 | static int dump_from_file; |
68f64ff8 FA |
13 | static const char *private_ref; |
14 | static const char *remote_ref = "refs/heads/master"; | |
8e43a1d0 FA |
15 | static const char *marksfilename, *notes_ref; |
16 | struct rev_note { unsigned int rev_nr; }; | |
68f64ff8 FA |
17 | |
18 | static int cmd_capabilities(const char *line); | |
19 | static int cmd_import(const char *line); | |
20 | static int cmd_list(const char *line); | |
21 | ||
22 | typedef int (*input_command_handler)(const char *); | |
23 | struct input_command_entry { | |
24 | const char *name; | |
25 | input_command_handler fn; | |
26 | unsigned char batchable; /* whether the command starts or is part of a batch */ | |
27 | }; | |
28 | ||
29 | static const struct input_command_entry input_command_list[] = { | |
30 | { "capabilities", cmd_capabilities, 0 }, | |
31 | { "import", cmd_import, 1 }, | |
32 | { "list", cmd_list, 0 }, | |
33 | { NULL, NULL } | |
34 | }; | |
35 | ||
36 | static int cmd_capabilities(const char *line) | |
37 | { | |
38 | printf("import\n"); | |
39 | printf("bidi-import\n"); | |
40 | printf("refspec %s:%s\n\n", remote_ref, private_ref); | |
41 | fflush(stdout); | |
42 | return 0; | |
43 | } | |
44 | ||
45 | static void terminate_batch(void) | |
46 | { | |
47 | /* terminate a current batch's fast-import stream */ | |
48 | printf("done\n"); | |
49 | fflush(stdout); | |
50 | } | |
51 | ||
8e43a1d0 FA |
52 | /* NOTE: 'ref' refers to a git reference, while 'rev' refers to a svn revision. */ |
53 | static char *read_ref_note(const unsigned char sha1[20]) | |
54 | { | |
55 | const unsigned char *note_sha1; | |
56 | char *msg = NULL; | |
57 | unsigned long msglen; | |
58 | enum object_type type; | |
59 | ||
60 | init_notes(NULL, notes_ref, NULL, 0); | |
61 | if (!(note_sha1 = get_note(NULL, sha1))) | |
62 | return NULL; /* note tree not found */ | |
63 | if (!(msg = read_sha1_file(note_sha1, &type, &msglen))) | |
64 | error("Empty notes tree. %s", notes_ref); | |
65 | else if (!msglen || type != OBJ_BLOB) { | |
66 | error("Note contains unusable content. " | |
67 | "Is something else using this notes tree? %s", notes_ref); | |
68 | free(msg); | |
69 | msg = NULL; | |
70 | } | |
71 | free_notes(NULL); | |
72 | return msg; | |
73 | } | |
74 | ||
75 | static int parse_rev_note(const char *msg, struct rev_note *res) | |
76 | { | |
77 | const char *key, *value, *end; | |
78 | size_t len; | |
79 | ||
80 | while (*msg) { | |
81 | end = strchr(msg, '\n'); | |
82 | len = end ? end - msg : strlen(msg); | |
83 | ||
84 | key = "Revision-number: "; | |
85 | if (!prefixcmp(msg, key)) { | |
86 | long i; | |
87 | char *end; | |
88 | value = msg + strlen(key); | |
89 | i = strtol(value, &end, 0); | |
90 | if (end == value || i < 0 || i > UINT32_MAX) | |
91 | return -1; | |
92 | res->rev_nr = i; | |
bfae342c | 93 | return 0; |
8e43a1d0 FA |
94 | } |
95 | msg += len + 1; | |
96 | } | |
bfae342c JK |
97 | /* didn't find it */ |
98 | return -1; | |
8e43a1d0 FA |
99 | } |
100 | ||
5bfc76b5 FA |
101 | static int note2mark_cb(const unsigned char *object_sha1, |
102 | const unsigned char *note_sha1, char *note_path, | |
103 | void *cb_data) | |
104 | { | |
105 | FILE *file = (FILE *)cb_data; | |
106 | char *msg; | |
107 | unsigned long msglen; | |
108 | enum object_type type; | |
109 | struct rev_note note; | |
110 | ||
111 | if (!(msg = read_sha1_file(note_sha1, &type, &msglen)) || | |
112 | !msglen || type != OBJ_BLOB) { | |
113 | free(msg); | |
114 | return 1; | |
115 | } | |
116 | if (parse_rev_note(msg, ¬e)) | |
117 | return 2; | |
118 | if (fprintf(file, ":%d %s\n", note.rev_nr, sha1_to_hex(object_sha1)) < 1) | |
119 | return 3; | |
120 | return 0; | |
121 | } | |
122 | ||
123 | static void regenerate_marks(void) | |
124 | { | |
125 | int ret; | |
126 | FILE *marksfile = fopen(marksfilename, "w+"); | |
127 | ||
128 | if (!marksfile) | |
129 | die_errno("Couldn't create mark file %s.", marksfilename); | |
130 | ret = for_each_note(NULL, 0, note2mark_cb, marksfile); | |
131 | if (ret) | |
132 | die("Regeneration of marks failed, returned %d.", ret); | |
133 | fclose(marksfile); | |
134 | } | |
135 | ||
136 | static void check_or_regenerate_marks(int latestrev) | |
137 | { | |
138 | FILE *marksfile; | |
139 | struct strbuf sb = STRBUF_INIT; | |
140 | struct strbuf line = STRBUF_INIT; | |
141 | int found = 0; | |
142 | ||
143 | if (latestrev < 1) | |
144 | return; | |
145 | ||
146 | init_notes(NULL, notes_ref, NULL, 0); | |
147 | marksfile = fopen(marksfilename, "r"); | |
148 | if (!marksfile) { | |
149 | regenerate_marks(); | |
150 | marksfile = fopen(marksfilename, "r"); | |
151 | if (!marksfile) | |
152 | die_errno("cannot read marks file %s!", marksfilename); | |
153 | fclose(marksfile); | |
154 | } else { | |
155 | strbuf_addf(&sb, ":%d ", latestrev); | |
156 | while (strbuf_getline(&line, marksfile, '\n') != EOF) { | |
157 | if (!prefixcmp(line.buf, sb.buf)) { | |
158 | found++; | |
159 | break; | |
160 | } | |
161 | } | |
162 | fclose(marksfile); | |
163 | if (!found) | |
164 | regenerate_marks(); | |
165 | } | |
166 | free_notes(NULL); | |
167 | strbuf_release(&sb); | |
168 | strbuf_release(&line); | |
169 | } | |
170 | ||
68f64ff8 FA |
171 | static int cmd_import(const char *line) |
172 | { | |
173 | int code; | |
174 | int dumpin_fd; | |
8e43a1d0 FA |
175 | char *note_msg; |
176 | unsigned char head_sha1[20]; | |
177 | unsigned int startrev; | |
68f64ff8 FA |
178 | struct argv_array svndump_argv = ARGV_ARRAY_INIT; |
179 | struct child_process svndump_proc; | |
180 | ||
8e43a1d0 FA |
181 | if (read_ref(private_ref, head_sha1)) |
182 | startrev = 0; | |
183 | else { | |
184 | note_msg = read_ref_note(head_sha1); | |
185 | if(note_msg == NULL) { | |
186 | warning("No note found for %s.", private_ref); | |
187 | startrev = 0; | |
188 | } else { | |
189 | struct rev_note note = { 0 }; | |
190 | if (parse_rev_note(note_msg, ¬e)) | |
191 | die("Revision number couldn't be parsed from note."); | |
192 | startrev = note.rev_nr + 1; | |
193 | free(note_msg); | |
194 | } | |
195 | } | |
5bfc76b5 | 196 | check_or_regenerate_marks(startrev - 1); |
8e43a1d0 | 197 | |
f6529de9 FA |
198 | if (dump_from_file) { |
199 | dumpin_fd = open(url, O_RDONLY); | |
200 | if(dumpin_fd < 0) | |
201 | die_errno("Couldn't open svn dump file %s.", url); | |
202 | } else { | |
203 | memset(&svndump_proc, 0, sizeof(struct child_process)); | |
204 | svndump_proc.out = -1; | |
205 | argv_array_push(&svndump_argv, "svnrdump"); | |
206 | argv_array_push(&svndump_argv, "dump"); | |
207 | argv_array_push(&svndump_argv, url); | |
208 | argv_array_pushf(&svndump_argv, "-r%u:HEAD", startrev); | |
209 | svndump_proc.argv = svndump_argv.argv; | |
210 | ||
211 | code = start_command(&svndump_proc); | |
212 | if (code) | |
213 | die("Unable to start %s, code %d", svndump_proc.argv[0], code); | |
214 | dumpin_fd = svndump_proc.out; | |
215 | } | |
8d7cd8eb FA |
216 | /* setup marks file import/export */ |
217 | printf("feature import-marks-if-exists=%s\n" | |
218 | "feature export-marks=%s\n", marksfilename, marksfilename); | |
219 | ||
68f64ff8 | 220 | svndump_init_fd(dumpin_fd, STDIN_FILENO); |
8e43a1d0 | 221 | svndump_read(url, private_ref, notes_ref); |
68f64ff8 FA |
222 | svndump_deinit(); |
223 | svndump_reset(); | |
224 | ||
225 | close(dumpin_fd); | |
f6529de9 FA |
226 | if (!dump_from_file) { |
227 | code = finish_command(&svndump_proc); | |
228 | if (code) | |
229 | warning("%s, returned %d", svndump_proc.argv[0], code); | |
230 | argv_array_clear(&svndump_argv); | |
231 | } | |
68f64ff8 FA |
232 | |
233 | return 0; | |
234 | } | |
235 | ||
236 | static int cmd_list(const char *line) | |
237 | { | |
238 | printf("? %s\n\n", remote_ref); | |
239 | fflush(stdout); | |
240 | return 0; | |
241 | } | |
242 | ||
243 | static int do_command(struct strbuf *line) | |
244 | { | |
245 | const struct input_command_entry *p = input_command_list; | |
246 | static struct string_list batchlines = STRING_LIST_INIT_DUP; | |
247 | static const struct input_command_entry *batch_cmd; | |
248 | /* | |
249 | * commands can be grouped together in a batch. | |
250 | * Batches are ended by \n. If no batch is active the program ends. | |
251 | * During a batch all lines are buffered and passed to the handler function | |
252 | * when the batch is terminated. | |
253 | */ | |
254 | if (line->len == 0) { | |
255 | if (batch_cmd) { | |
256 | struct string_list_item *item; | |
257 | for_each_string_list_item(item, &batchlines) | |
258 | batch_cmd->fn(item->string); | |
259 | terminate_batch(); | |
260 | batch_cmd = NULL; | |
261 | string_list_clear(&batchlines, 0); | |
262 | return 0; /* end of the batch, continue reading other commands. */ | |
263 | } | |
264 | return 1; /* end of command stream, quit */ | |
265 | } | |
266 | if (batch_cmd) { | |
267 | if (prefixcmp(batch_cmd->name, line->buf)) | |
268 | die("Active %s batch interrupted by %s", batch_cmd->name, line->buf); | |
269 | /* buffer batch lines */ | |
270 | string_list_append(&batchlines, line->buf); | |
271 | return 0; | |
272 | } | |
273 | ||
274 | for (p = input_command_list; p->name; p++) { | |
275 | if (!prefixcmp(line->buf, p->name) && (strlen(p->name) == line->len || | |
276 | line->buf[strlen(p->name)] == ' ')) { | |
277 | if (p->batchable) { | |
278 | batch_cmd = p; | |
279 | string_list_append(&batchlines, line->buf); | |
280 | return 0; | |
281 | } | |
282 | return p->fn(line->buf); | |
283 | } | |
284 | } | |
285 | die("Unknown command '%s'\n", line->buf); | |
286 | return 0; | |
287 | } | |
288 | ||
84d32bf7 | 289 | int main(int argc, char **argv) |
68f64ff8 FA |
290 | { |
291 | struct strbuf buf = STRBUF_INIT, url_sb = STRBUF_INIT, | |
8e43a1d0 FA |
292 | private_ref_sb = STRBUF_INIT, marksfilename_sb = STRBUF_INIT, |
293 | notes_ref_sb = STRBUF_INIT; | |
68f64ff8 FA |
294 | static struct remote *remote; |
295 | const char *url_in; | |
296 | ||
297 | git_extract_argv0_path(argv[0]); | |
298 | setup_git_directory(); | |
299 | if (argc < 2 || argc > 3) { | |
300 | usage("git-remote-svn <remote-name> [<url>]"); | |
301 | return 1; | |
302 | } | |
303 | ||
304 | remote = remote_get(argv[1]); | |
305 | url_in = (argc == 3) ? argv[2] : remote->url[0]; | |
306 | ||
f6529de9 FA |
307 | if (!prefixcmp(url_in, "file://")) { |
308 | dump_from_file = 1; | |
309 | url = url_decode(url_in + sizeof("file://")-1); | |
310 | } else { | |
311 | dump_from_file = 0; | |
312 | end_url_with_slash(&url_sb, url_in); | |
313 | url = url_sb.buf; | |
314 | } | |
68f64ff8 FA |
315 | |
316 | strbuf_addf(&private_ref_sb, "refs/svn/%s/master", remote->name); | |
317 | private_ref = private_ref_sb.buf; | |
318 | ||
8e43a1d0 FA |
319 | strbuf_addf(¬es_ref_sb, "refs/notes/%s/revs", remote->name); |
320 | notes_ref = notes_ref_sb.buf; | |
321 | ||
8d7cd8eb FA |
322 | strbuf_addf(&marksfilename_sb, "%s/info/fast-import/remote-svn/%s.marks", |
323 | get_git_dir(), remote->name); | |
324 | marksfilename = marksfilename_sb.buf; | |
325 | ||
68f64ff8 FA |
326 | while (1) { |
327 | if (strbuf_getline(&buf, stdin, '\n') == EOF) { | |
328 | if (ferror(stdin)) | |
329 | die("Error reading command stream"); | |
330 | else | |
331 | die("Unexpected end of command stream"); | |
332 | } | |
333 | if (do_command(&buf)) | |
334 | break; | |
335 | strbuf_reset(&buf); | |
336 | } | |
337 | ||
338 | strbuf_release(&buf); | |
339 | strbuf_release(&url_sb); | |
340 | strbuf_release(&private_ref_sb); | |
8e43a1d0 | 341 | strbuf_release(¬es_ref_sb); |
8d7cd8eb | 342 | strbuf_release(&marksfilename_sb); |
68f64ff8 FA |
343 | return 0; |
344 | } |