2 * Parse and rearrange a svnadmin dump.
3 * Create the dump with:
4 * svnadmin dump --incremental -r<startrev>:<endrev> <repository> >outfile
6 * Licensed under a two-clause BSD-style license.
7 * See LICENSE for details.
11 #include "repo_tree.h"
12 #include "fast_export.h"
13 #include "line_buffer.h"
14 #include "string_pool.h"
18 * Compare start of string to literal of equal length;
19 * must be guarded by length test.
21 #define constcmp(s, ref) memcmp(s, ref, sizeof(ref) - 1)
23 #define NODEACT_REPLACE 4
24 #define NODEACT_DELETE 3
26 #define NODEACT_CHANGE 1
27 #define NODEACT_UNKNOWN 0
33 #define LENGTH_UNKNOWN (~0)
34 #define DATE_RFC2822_LEN 31
36 static struct line_buffer input = LINE_BUFFER_INIT;
39 uint32_t action, propLength, textLength, srcRev, type;
40 uint32_t src[REPO_MAX_PATH_DEPTH], dst[REPO_MAX_PATH_DEPTH];
41 uint32_t text_delta, prop_delta;
46 unsigned long timestamp;
47 struct strbuf log, author;
52 struct strbuf uuid, url;
55 static void reset_node_ctx(char *fname)
58 node_ctx.action = NODEACT_UNKNOWN;
59 node_ctx.propLength = LENGTH_UNKNOWN;
60 node_ctx.textLength = LENGTH_UNKNOWN;
63 pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.dst, "/", fname);
64 node_ctx.text_delta = 0;
65 node_ctx.prop_delta = 0;
68 static void reset_rev_ctx(uint32_t revision)
70 rev_ctx.revision = revision;
71 rev_ctx.timestamp = 0;
72 strbuf_reset(&rev_ctx.log);
73 strbuf_reset(&rev_ctx.author);
76 static void reset_dump_ctx(const char *url)
78 strbuf_reset(&dump_ctx.url);
80 strbuf_addstr(&dump_ctx.url, url);
82 strbuf_reset(&dump_ctx.uuid);
85 static void handle_property(const struct strbuf *key_buf,
86 const char *val, uint32_t len,
89 const char *key = key_buf->buf;
90 size_t keylen = key_buf->len;
93 case sizeof("svn:log"):
94 if (constcmp(key, "svn:log"))
97 die("invalid dump: unsets svn:log");
98 strbuf_reset(&rev_ctx.log);
99 strbuf_add(&rev_ctx.log, val, len);
101 case sizeof("svn:author"):
102 if (constcmp(key, "svn:author"))
104 strbuf_reset(&rev_ctx.author);
106 strbuf_add(&rev_ctx.author, val, len);
108 case sizeof("svn:date"):
109 if (constcmp(key, "svn:date"))
112 die("invalid dump: unsets svn:date");
113 if (parse_date_basic(val, &rev_ctx.timestamp, NULL))
114 warning("invalid timestamp: %s", val);
116 case sizeof("svn:executable"):
117 case sizeof("svn:special"):
118 if (keylen == strlen("svn:executable") &&
119 constcmp(key, "svn:executable"))
121 if (keylen == strlen("svn:special") &&
122 constcmp(key, "svn:special"))
127 die("invalid dump: sets type twice");
130 node_ctx.type = REPO_MODE_BLB;
134 node_ctx.type = keylen == strlen("svn:executable") ?
140 static void die_short_read(void)
142 if (buffer_ferror(&input))
143 die_errno("error reading dump file");
144 die("invalid dump: unexpected end of file");
147 static void read_props(void)
149 static struct strbuf key = STRBUF_INIT;
152 * NEEDSWORK: to support simple mode changes like
159 * we keep track of whether a mode has been set and reset to
160 * plain file only if not. We should be keeping track of the
161 * symlink and executable bits separately instead.
163 uint32_t type_set = 0;
164 while ((t = buffer_read_line(&input)) && strcmp(t, "PROPS-END")) {
167 const char type = t[0];
170 if (!type || t[1] != ' ')
171 die("invalid property line: %s\n", t);
173 val = buffer_read_string(&input, len);
174 if (!val || strlen(val) != len)
177 /* Discard trailing newline. */
178 ch = buffer_read_char(&input);
182 die("invalid dump: expected newline after %s", val);
189 strbuf_add(&key, val, len);
197 handle_property(&key, val, len, &type_set);
201 die("invalid property line: %s\n", t);
206 static void handle_node(void)
209 const uint32_t type = node_ctx.type;
210 const int have_props = node_ctx.propLength != LENGTH_UNKNOWN;
211 const int have_text = node_ctx.textLength != LENGTH_UNKNOWN;
213 if (node_ctx.text_delta)
214 die("text deltas not supported");
216 mark = next_blob_mark();
217 if (node_ctx.action == NODEACT_DELETE) {
218 if (have_text || have_props || node_ctx.srcRev)
219 die("invalid dump: deletion node has "
220 "copyfrom info, text, or properties");
221 return repo_delete(node_ctx.dst);
223 if (node_ctx.action == NODEACT_REPLACE) {
224 repo_delete(node_ctx.dst);
225 node_ctx.action = NODEACT_ADD;
227 if (node_ctx.srcRev) {
228 repo_copy(node_ctx.srcRev, node_ctx.src, node_ctx.dst);
229 if (node_ctx.action == NODEACT_ADD)
230 node_ctx.action = NODEACT_CHANGE;
232 if (have_text && type == REPO_MODE_DIR)
233 die("invalid dump: directories cannot have text attached");
236 * Decide on the new content (mark) and mode (node_ctx.type).
238 if (node_ctx.action == NODEACT_CHANGE && !~*node_ctx.dst) {
239 if (type != REPO_MODE_DIR)
240 die("invalid dump: root of tree is not a regular file");
241 } else if (node_ctx.action == NODEACT_CHANGE) {
244 mark = repo_read_path(node_ctx.dst);
245 mode = repo_read_mode(node_ctx.dst);
246 if (mode == REPO_MODE_DIR && type != REPO_MODE_DIR)
247 die("invalid dump: cannot modify a directory into a file");
248 if (mode != REPO_MODE_DIR && type == REPO_MODE_DIR)
249 die("invalid dump: cannot modify a file into a directory");
250 node_ctx.type = mode;
251 } else if (node_ctx.action == NODEACT_ADD) {
252 if (!have_text && type != REPO_MODE_DIR)
253 die("invalid dump: adds node without text");
255 die("invalid dump: Node-path block lacks Node-action");
259 * Adjust mode to reflect properties.
262 if (!node_ctx.prop_delta)
263 node_ctx.type = type;
264 if (node_ctx.propLength)
271 repo_add(node_ctx.dst, node_ctx.type, mark);
273 fast_export_blob(node_ctx.type, mark,
274 node_ctx.textLength, &input);
277 static void handle_revision(void)
279 if (rev_ctx.revision)
280 repo_commit(rev_ctx.revision, rev_ctx.author.buf,
281 rev_ctx.log.buf, dump_ctx.uuid.buf, dump_ctx.url.buf,
285 void svndump_read(const char *url)
289 uint32_t active_ctx = DUMP_CTX;
293 while ((t = buffer_read_line(&input))) {
294 val = strchr(t, ':');
302 /* strlen(key) + 1 */
303 switch (val - t - 1) {
304 case sizeof("SVN-fs-dump-format-version"):
305 if (constcmp(t, "SVN-fs-dump-format-version"))
307 dump_ctx.version = atoi(val);
308 if (dump_ctx.version > 3)
309 die("expected svn dump format version <= 3, found %"PRIu32,
313 if (constcmp(t, "UUID"))
315 strbuf_reset(&dump_ctx.uuid);
316 strbuf_addstr(&dump_ctx.uuid, val);
318 case sizeof("Revision-number"):
319 if (constcmp(t, "Revision-number"))
321 if (active_ctx == NODE_CTX)
323 if (active_ctx != DUMP_CTX)
325 active_ctx = REV_CTX;
326 reset_rev_ctx(atoi(val));
328 case sizeof("Node-path"):
329 if (prefixcmp(t, "Node-"))
331 if (!constcmp(t + strlen("Node-"), "path")) {
332 if (active_ctx == NODE_CTX)
334 active_ctx = NODE_CTX;
338 if (constcmp(t + strlen("Node-"), "kind"))
340 if (!strcmp(val, "dir"))
341 node_ctx.type = REPO_MODE_DIR;
342 else if (!strcmp(val, "file"))
343 node_ctx.type = REPO_MODE_BLB;
345 fprintf(stderr, "Unknown node-kind: %s\n", val);
347 case sizeof("Node-action"):
348 if (constcmp(t, "Node-action"))
350 if (!strcmp(val, "delete")) {
351 node_ctx.action = NODEACT_DELETE;
352 } else if (!strcmp(val, "add")) {
353 node_ctx.action = NODEACT_ADD;
354 } else if (!strcmp(val, "change")) {
355 node_ctx.action = NODEACT_CHANGE;
356 } else if (!strcmp(val, "replace")) {
357 node_ctx.action = NODEACT_REPLACE;
359 fprintf(stderr, "Unknown node-action: %s\n", val);
360 node_ctx.action = NODEACT_UNKNOWN;
363 case sizeof("Node-copyfrom-path"):
364 if (constcmp(t, "Node-copyfrom-path"))
366 pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.src, "/", val);
368 case sizeof("Node-copyfrom-rev"):
369 if (constcmp(t, "Node-copyfrom-rev"))
371 node_ctx.srcRev = atoi(val);
373 case sizeof("Text-content-length"):
374 if (!constcmp(t, "Text-content-length")) {
375 node_ctx.textLength = atoi(val);
378 if (constcmp(t, "Prop-content-length"))
380 node_ctx.propLength = atoi(val);
382 case sizeof("Text-delta"):
383 if (!constcmp(t, "Text-delta")) {
384 node_ctx.text_delta = !strcmp(val, "true");
387 if (constcmp(t, "Prop-delta"))
389 node_ctx.prop_delta = !strcmp(val, "true");
391 case sizeof("Content-length"):
392 if (constcmp(t, "Content-length"))
395 t = buffer_read_line(&input);
399 die("invalid dump: expected blank line after content length header");
400 if (active_ctx == REV_CTX) {
402 } else if (active_ctx == NODE_CTX) {
404 active_ctx = REV_CTX;
406 fprintf(stderr, "Unexpected content length header: %"PRIu32"\n", len);
407 if (buffer_skip_bytes(&input, len) != len)
412 if (buffer_ferror(&input))
414 if (active_ctx == NODE_CTX)
416 if (active_ctx != DUMP_CTX)
420 int svndump_init(const char *filename)
422 if (buffer_init(&input, filename))
423 return error("cannot open %s: %s", filename, strerror(errno));
425 strbuf_init(&dump_ctx.uuid, 4096);
426 strbuf_init(&dump_ctx.url, 4096);
427 strbuf_init(&rev_ctx.log, 4096);
428 strbuf_init(&rev_ctx.author, 4096);
429 reset_dump_ctx(NULL);
431 reset_node_ctx(NULL);
435 void svndump_deinit(void)
438 reset_dump_ctx(NULL);
440 reset_node_ctx(NULL);
441 strbuf_release(&rev_ctx.log);
442 if (buffer_deinit(&input))
443 fprintf(stderr, "Input error\n");
445 fprintf(stderr, "Output error\n");
448 void svndump_reset(void)
450 buffer_reset(&input);
452 strbuf_release(&dump_ctx.uuid);
453 strbuf_release(&dump_ctx.url);
454 strbuf_release(&rev_ctx.log);
455 strbuf_release(&rev_ctx.author);