fetch-pack: move core code to libgit.a
[git/jnareb-git.git] / remote-testsvn.c
blob51fba059a242103fd13bb4b01c471662e205ec43
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"
11 static const char *url;
12 static int dump_from_file;
13 static const char *private_ref;
14 static const char *remote_ref = "refs/heads/master";
15 static const char *marksfilename, *notes_ref;
16 struct rev_note { unsigned int rev_nr; };
18 static int cmd_capabilities(const char *line);
19 static int cmd_import(const char *line);
20 static int cmd_list(const char *line);
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 */
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 }
36 static int cmd_capabilities(const char *line)
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;
45 static void terminate_batch(void)
47 /* terminate a current batch's fast-import stream */
48 printf("done\n");
49 fflush(stdout);
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])
55 const unsigned char *note_sha1;
56 char *msg = NULL;
57 unsigned long msglen;
58 enum object_type type;
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;
71 free_notes(NULL);
72 return msg;
75 static int parse_rev_note(const char *msg, struct rev_note *res)
77 const char *key, *value, *end;
78 size_t len;
80 while (*msg) {
81 end = strchr(msg, '\n');
82 len = end ? end - msg : strlen(msg);
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;
94 msg += len + 1;
96 return 0;
99 static int note2mark_cb(const unsigned char *object_sha1,
100 const unsigned char *note_sha1, char *note_path,
101 void *cb_data)
103 FILE *file = (FILE *)cb_data;
104 char *msg;
105 unsigned long msglen;
106 enum object_type type;
107 struct rev_note note;
109 if (!(msg = read_sha1_file(note_sha1, &type, &msglen)) ||
110 !msglen || type != OBJ_BLOB) {
111 free(msg);
112 return 1;
114 if (parse_rev_note(msg, &note))
115 return 2;
116 if (fprintf(file, ":%d %s\n", note.rev_nr, sha1_to_hex(object_sha1)) < 1)
117 return 3;
118 return 0;
121 static void regenerate_marks(void)
123 int ret;
124 FILE *marksfile = fopen(marksfilename, "w+");
126 if (!marksfile)
127 die_errno("Couldn't create mark file %s.", marksfilename);
128 ret = for_each_note(NULL, 0, note2mark_cb, marksfile);
129 if (ret)
130 die("Regeneration of marks failed, returned %d.", ret);
131 fclose(marksfile);
134 static void check_or_regenerate_marks(int latestrev)
136 FILE *marksfile;
137 struct strbuf sb = STRBUF_INIT;
138 struct strbuf line = STRBUF_INIT;
139 int found = 0;
141 if (latestrev < 1)
142 return;
144 init_notes(NULL, notes_ref, NULL, 0);
145 marksfile = fopen(marksfilename, "r");
146 if (!marksfile) {
147 regenerate_marks();
148 marksfile = fopen(marksfilename, "r");
149 if (!marksfile)
150 die_errno("cannot read marks file %s!", marksfilename);
151 fclose(marksfile);
152 } else {
153 strbuf_addf(&sb, ":%d ", latestrev);
154 while (strbuf_getline(&line, marksfile, '\n') != EOF) {
155 if (!prefixcmp(line.buf, sb.buf)) {
156 found++;
157 break;
160 fclose(marksfile);
161 if (!found)
162 regenerate_marks();
164 free_notes(NULL);
165 strbuf_release(&sb);
166 strbuf_release(&line);
169 static int cmd_import(const char *line)
171 int code;
172 int dumpin_fd;
173 char *note_msg;
174 unsigned char head_sha1[20];
175 unsigned int startrev;
176 struct argv_array svndump_argv = ARGV_ARRAY_INIT;
177 struct child_process svndump_proc;
179 if (read_ref(private_ref, head_sha1))
180 startrev = 0;
181 else {
182 note_msg = read_ref_note(head_sha1);
183 if(note_msg == NULL) {
184 warning("No note found for %s.", private_ref);
185 startrev = 0;
186 } else {
187 struct rev_note note = { 0 };
188 if (parse_rev_note(note_msg, &note))
189 die("Revision number couldn't be parsed from note.");
190 startrev = note.rev_nr + 1;
191 free(note_msg);
194 check_or_regenerate_marks(startrev - 1);
196 if (dump_from_file) {
197 dumpin_fd = open(url, O_RDONLY);
198 if(dumpin_fd < 0)
199 die_errno("Couldn't open svn dump file %s.", url);
200 } else {
201 memset(&svndump_proc, 0, sizeof(struct child_process));
202 svndump_proc.out = -1;
203 argv_array_push(&svndump_argv, "svnrdump");
204 argv_array_push(&svndump_argv, "dump");
205 argv_array_push(&svndump_argv, url);
206 argv_array_pushf(&svndump_argv, "-r%u:HEAD", startrev);
207 svndump_proc.argv = svndump_argv.argv;
209 code = start_command(&svndump_proc);
210 if (code)
211 die("Unable to start %s, code %d", svndump_proc.argv[0], code);
212 dumpin_fd = svndump_proc.out;
214 /* setup marks file import/export */
215 printf("feature import-marks-if-exists=%s\n"
216 "feature export-marks=%s\n", marksfilename, marksfilename);
218 svndump_init_fd(dumpin_fd, STDIN_FILENO);
219 svndump_read(url, private_ref, notes_ref);
220 svndump_deinit();
221 svndump_reset();
223 close(dumpin_fd);
224 if (!dump_from_file) {
225 code = finish_command(&svndump_proc);
226 if (code)
227 warning("%s, returned %d", svndump_proc.argv[0], code);
228 argv_array_clear(&svndump_argv);
231 return 0;
234 static int cmd_list(const char *line)
236 printf("? %s\n\n", remote_ref);
237 fflush(stdout);
238 return 0;
241 static int do_command(struct strbuf *line)
243 const struct input_command_entry *p = input_command_list;
244 static struct string_list batchlines = STRING_LIST_INIT_DUP;
245 static const struct input_command_entry *batch_cmd;
247 * commands can be grouped together in a batch.
248 * Batches are ended by \n. If no batch is active the program ends.
249 * During a batch all lines are buffered and passed to the handler function
250 * when the batch is terminated.
252 if (line->len == 0) {
253 if (batch_cmd) {
254 struct string_list_item *item;
255 for_each_string_list_item(item, &batchlines)
256 batch_cmd->fn(item->string);
257 terminate_batch();
258 batch_cmd = NULL;
259 string_list_clear(&batchlines, 0);
260 return 0; /* end of the batch, continue reading other commands. */
262 return 1; /* end of command stream, quit */
264 if (batch_cmd) {
265 if (prefixcmp(batch_cmd->name, line->buf))
266 die("Active %s batch interrupted by %s", batch_cmd->name, line->buf);
267 /* buffer batch lines */
268 string_list_append(&batchlines, line->buf);
269 return 0;
272 for (p = input_command_list; p->name; p++) {
273 if (!prefixcmp(line->buf, p->name) && (strlen(p->name) == line->len ||
274 line->buf[strlen(p->name)] == ' ')) {
275 if (p->batchable) {
276 batch_cmd = p;
277 string_list_append(&batchlines, line->buf);
278 return 0;
280 return p->fn(line->buf);
283 die("Unknown command '%s'\n", line->buf);
284 return 0;
287 int main(int argc, const char **argv)
289 struct strbuf buf = STRBUF_INIT, url_sb = STRBUF_INIT,
290 private_ref_sb = STRBUF_INIT, marksfilename_sb = STRBUF_INIT,
291 notes_ref_sb = STRBUF_INIT;
292 static struct remote *remote;
293 const char *url_in;
295 git_extract_argv0_path(argv[0]);
296 setup_git_directory();
297 if (argc < 2 || argc > 3) {
298 usage("git-remote-svn <remote-name> [<url>]");
299 return 1;
302 remote = remote_get(argv[1]);
303 url_in = (argc == 3) ? argv[2] : remote->url[0];
305 if (!prefixcmp(url_in, "file://")) {
306 dump_from_file = 1;
307 url = url_decode(url_in + sizeof("file://")-1);
308 } else {
309 dump_from_file = 0;
310 end_url_with_slash(&url_sb, url_in);
311 url = url_sb.buf;
314 strbuf_addf(&private_ref_sb, "refs/svn/%s/master", remote->name);
315 private_ref = private_ref_sb.buf;
317 strbuf_addf(&notes_ref_sb, "refs/notes/%s/revs", remote->name);
318 notes_ref = notes_ref_sb.buf;
320 strbuf_addf(&marksfilename_sb, "%s/info/fast-import/remote-svn/%s.marks",
321 get_git_dir(), remote->name);
322 marksfilename = marksfilename_sb.buf;
324 while (1) {
325 if (strbuf_getline(&buf, stdin, '\n') == EOF) {
326 if (ferror(stdin))
327 die("Error reading command stream");
328 else
329 die("Unexpected end of command stream");
331 if (do_command(&buf))
332 break;
333 strbuf_reset(&buf);
336 strbuf_release(&buf);
337 strbuf_release(&url_sb);
338 strbuf_release(&private_ref_sb);
339 strbuf_release(&notes_ref_sb);
340 strbuf_release(&marksfilename_sb);
341 return 0;