15f822ea844ba64a12d19e02e12f244b2f99d4cb
1/*
2 * Parse and rearrange a svnadmin dump.
3 * Create the dump with:
4 * svnadmin dump --incremental -r<startrev>:<endrev> <repository> >outfile
5 *
6 * Licensed under a two-clause BSD-style license.
7 * See LICENSE for details.
8 */
9#include "cache.h"
11#include "repo_tree.h"
12#include "fast_export.h"
13#include "line_buffer.h"
14#include "obj_pool.h"
15#include "string_pool.h"
16#define NODEACT_REPLACE 4
18#define NODEACT_DELETE 3
19#define NODEACT_ADD 2
20#define NODEACT_CHANGE 1
21#define NODEACT_UNKNOWN 0
22#define DUMP_CTX 0
24#define REV_CTX 1
25#define NODE_CTX 2
26#define LENGTH_UNKNOWN (~0)
28#define DATE_RFC2822_LEN 31
29/* Create memory pool for log messages */
31obj_pool_gen(log, char, 4096)
32static struct line_buffer input = LINE_BUFFER_INIT;
34static char *log_copy(uint32_t length, const char *log)
36{
37 char *buffer;
38 log_free(log_pool.size);
39 buffer = log_pointer(log_alloc(length));
40 strncpy(buffer, log, length);
41 return buffer;
42}
43static struct {
45 uint32_t action, propLength, textLength, srcRev, type;
46 uint32_t src[REPO_MAX_PATH_DEPTH], dst[REPO_MAX_PATH_DEPTH];
47 uint32_t text_delta, prop_delta;
48} node_ctx;
49static struct {
51 uint32_t revision, author;
52 unsigned long timestamp;
53 char *log;
54} rev_ctx;
55static struct {
57 uint32_t version, uuid, url;
58} dump_ctx;
59static struct {
61 uint32_t svn_log, svn_author, svn_date, svn_executable, svn_special, uuid,
62 revision_number, node_path, node_kind, node_action,
63 node_copyfrom_path, node_copyfrom_rev, text_content_length,
64 prop_content_length, content_length, svn_fs_dump_format_version,
65 /* version 3 format */
66 text_delta, prop_delta;
67} keys;
68static void reset_node_ctx(char *fname)
70{
71 node_ctx.type = 0;
72 node_ctx.action = NODEACT_UNKNOWN;
73 node_ctx.propLength = LENGTH_UNKNOWN;
74 node_ctx.textLength = LENGTH_UNKNOWN;
75 node_ctx.src[0] = ~0;
76 node_ctx.srcRev = 0;
77 pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.dst, "/", fname);
78 node_ctx.text_delta = 0;
79 node_ctx.prop_delta = 0;
80}
81static void reset_rev_ctx(uint32_t revision)
83{
84 rev_ctx.revision = revision;
85 rev_ctx.timestamp = 0;
86 rev_ctx.log = NULL;
87 rev_ctx.author = ~0;
88}
89static void reset_dump_ctx(uint32_t url)
91{
92 dump_ctx.url = url;
93 dump_ctx.version = 1;
94 dump_ctx.uuid = ~0;
95}
96static void init_keys(void)
98{
99 keys.svn_log = pool_intern("svn:log");
100 keys.svn_author = pool_intern("svn:author");
101 keys.svn_date = pool_intern("svn:date");
102 keys.svn_executable = pool_intern("svn:executable");
103 keys.svn_special = pool_intern("svn:special");
104 keys.uuid = pool_intern("UUID");
105 keys.revision_number = pool_intern("Revision-number");
106 keys.node_path = pool_intern("Node-path");
107 keys.node_kind = pool_intern("Node-kind");
108 keys.node_action = pool_intern("Node-action");
109 keys.node_copyfrom_path = pool_intern("Node-copyfrom-path");
110 keys.node_copyfrom_rev = pool_intern("Node-copyfrom-rev");
111 keys.text_content_length = pool_intern("Text-content-length");
112 keys.prop_content_length = pool_intern("Prop-content-length");
113 keys.content_length = pool_intern("Content-length");
114 keys.svn_fs_dump_format_version = pool_intern("SVN-fs-dump-format-version");
115 /* version 3 format (Subversion 1.1.0) */
116 keys.text_delta = pool_intern("Text-delta");
117 keys.prop_delta = pool_intern("Prop-delta");
118}
119static void handle_property(uint32_t key, const char *val, uint32_t len,
121 uint32_t *type_set)
122{
123 if (key == keys.svn_log) {
124 if (!val)
125 die("invalid dump: unsets svn:log");
126 /* Value length excludes terminating nul. */
127 rev_ctx.log = log_copy(len + 1, val);
128 } else if (key == keys.svn_author) {
129 rev_ctx.author = pool_intern(val);
130 } else if (key == keys.svn_date) {
131 if (!val)
132 die("invalid dump: unsets svn:date");
133 if (parse_date_basic(val, &rev_ctx.timestamp, NULL))
134 warning("invalid timestamp: %s", val);
135 } else if (key == keys.svn_executable || key == keys.svn_special) {
136 if (*type_set) {
137 if (!val)
138 return;
139 die("invalid dump: sets type twice");
140 }
141 if (!val) {
142 node_ctx.type = REPO_MODE_BLB;
143 return;
144 }
145 *type_set = 1;
146 node_ctx.type = key == keys.svn_executable ?
147 REPO_MODE_EXE :
148 REPO_MODE_LNK;
149 }
150}
151static void die_short_read(void)
153{
154 if (buffer_ferror(&input))
155 die_errno("error reading dump file");
156 die("invalid dump: unexpected end of file");
157}
158static void read_props(void)
160{
161 uint32_t key = ~0;
162 const char *t;
163 /*
164 * NEEDSWORK: to support simple mode changes like
165 * K 11
166 * svn:special
167 * V 1
168 * *
169 * D 14
170 * svn:executable
171 * we keep track of whether a mode has been set and reset to
172 * plain file only if not. We should be keeping track of the
173 * symlink and executable bits separately instead.
174 */
175 uint32_t type_set = 0;
176 while ((t = buffer_read_line(&input)) && strcmp(t, "PROPS-END")) {
177 uint32_t len;
178 const char *val;
179 const char type = t[0];
180 int ch;
181 if (!type || t[1] != ' ')
183 die("invalid property line: %s\n", t);
184 len = atoi(&t[2]);
185 val = buffer_read_string(&input, len);
186 if (!val || strlen(val) != len)
187 die_short_read();
188 /* Discard trailing newline. */
190 ch = buffer_read_char(&input);
191 if (ch == EOF)
192 die_short_read();
193 if (ch != '\n')
194 die("invalid dump: expected newline after %s", val);
195 switch (type) {
197 case 'K':
198 key = pool_intern(val);
199 continue;
200 case 'D':
201 key = pool_intern(val);
202 val = NULL;
203 len = 0;
204 /* fall through */
205 case 'V':
206 handle_property(key, val, len, &type_set);
207 key = ~0;
208 continue;
209 default:
210 die("invalid property line: %s\n", t);
211 }
212 }
213}
214static void handle_node(void)
216{
217 uint32_t mark = 0;
218 const uint32_t type = node_ctx.type;
219 const int have_props = node_ctx.propLength != LENGTH_UNKNOWN;
220 const int have_text = node_ctx.textLength != LENGTH_UNKNOWN;
221 if (node_ctx.text_delta)
223 die("text deltas not supported");
224 if (have_text)
225 mark = next_blob_mark();
226 if (node_ctx.action == NODEACT_DELETE) {
227 if (have_text || have_props || node_ctx.srcRev)
228 die("invalid dump: deletion node has "
229 "copyfrom info, text, or properties");
230 return repo_delete(node_ctx.dst);
231 }
232 if (node_ctx.action == NODEACT_REPLACE) {
233 repo_delete(node_ctx.dst);
234 node_ctx.action = NODEACT_ADD;
235 }
236 if (node_ctx.srcRev) {
237 repo_copy(node_ctx.srcRev, node_ctx.src, node_ctx.dst);
238 if (node_ctx.action == NODEACT_ADD)
239 node_ctx.action = NODEACT_CHANGE;
240 }
241 if (have_text && type == REPO_MODE_DIR)
242 die("invalid dump: directories cannot have text attached");
243 /*
245 * Decide on the new content (mark) and mode (node_ctx.type).
246 */
247 if (node_ctx.action == NODEACT_CHANGE && !~*node_ctx.dst) {
248 if (type != REPO_MODE_DIR)
249 die("invalid dump: root of tree is not a regular file");
250 } else if (node_ctx.action == NODEACT_CHANGE) {
251 uint32_t mode;
252 if (!have_text)
253 mark = repo_read_path(node_ctx.dst);
254 mode = repo_read_mode(node_ctx.dst);
255 if (mode == REPO_MODE_DIR && type != REPO_MODE_DIR)
256 die("invalid dump: cannot modify a directory into a file");
257 if (mode != REPO_MODE_DIR && type == REPO_MODE_DIR)
258 die("invalid dump: cannot modify a file into a directory");
259 node_ctx.type = mode;
260 } else if (node_ctx.action == NODEACT_ADD) {
261 if (!have_text && type != REPO_MODE_DIR)
262 die("invalid dump: adds node without text");
263 } else {
264 die("invalid dump: Node-path block lacks Node-action");
265 }
266 /*
268 * Adjust mode to reflect properties.
269 */
270 if (have_props) {
271 if (!node_ctx.prop_delta)
272 node_ctx.type = type;
273 if (node_ctx.propLength)
274 read_props();
275 }
276 /*
278 * Save the result.
279 */
280 repo_add(node_ctx.dst, node_ctx.type, mark);
281 if (have_text)
282 fast_export_blob(node_ctx.type, mark,
283 node_ctx.textLength, &input);
284}
285static void handle_revision(void)
287{
288 if (rev_ctx.revision)
289 repo_commit(rev_ctx.revision, rev_ctx.author, rev_ctx.log,
290 dump_ctx.uuid, dump_ctx.url, rev_ctx.timestamp);
291}
292void svndump_read(const char *url)
294{
295 char *val;
296 char *t;
297 uint32_t active_ctx = DUMP_CTX;
298 uint32_t len;
299 uint32_t key;
300 reset_dump_ctx(pool_intern(url));
302 while ((t = buffer_read_line(&input))) {
303 val = strstr(t, ": ");
304 if (!val)
305 continue;
306 *val++ = '\0';
307 *val++ = '\0';
308 key = pool_intern(t);
309 if (key == keys.svn_fs_dump_format_version) {
311 dump_ctx.version = atoi(val);
312 if (dump_ctx.version > 3)
313 die("expected svn dump format version <= 3, found %"PRIu32,
314 dump_ctx.version);
315 } else if (key == keys.uuid) {
316 dump_ctx.uuid = pool_intern(val);
317 } else if (key == keys.revision_number) {
318 if (active_ctx == NODE_CTX)
319 handle_node();
320 if (active_ctx != DUMP_CTX)
321 handle_revision();
322 active_ctx = REV_CTX;
323 reset_rev_ctx(atoi(val));
324 } else if (key == keys.node_path) {
325 if (active_ctx == NODE_CTX)
326 handle_node();
327 active_ctx = NODE_CTX;
328 reset_node_ctx(val);
329 } else if (key == keys.node_kind) {
330 if (!strcmp(val, "dir"))
331 node_ctx.type = REPO_MODE_DIR;
332 else if (!strcmp(val, "file"))
333 node_ctx.type = REPO_MODE_BLB;
334 else
335 fprintf(stderr, "Unknown node-kind: %s\n", val);
336 } else if (key == keys.node_action) {
337 if (!strcmp(val, "delete")) {
338 node_ctx.action = NODEACT_DELETE;
339 } else if (!strcmp(val, "add")) {
340 node_ctx.action = NODEACT_ADD;
341 } else if (!strcmp(val, "change")) {
342 node_ctx.action = NODEACT_CHANGE;
343 } else if (!strcmp(val, "replace")) {
344 node_ctx.action = NODEACT_REPLACE;
345 } else {
346 fprintf(stderr, "Unknown node-action: %s\n", val);
347 node_ctx.action = NODEACT_UNKNOWN;
348 }
349 } else if (key == keys.node_copyfrom_path) {
350 pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.src, "/", val);
351 } else if (key == keys.node_copyfrom_rev) {
352 node_ctx.srcRev = atoi(val);
353 } else if (key == keys.text_content_length) {
354 node_ctx.textLength = atoi(val);
355 } else if (key == keys.prop_content_length) {
356 node_ctx.propLength = atoi(val);
357 } else if (key == keys.text_delta) {
358 node_ctx.text_delta = !strcmp(val, "true");
359 } else if (key == keys.prop_delta) {
360 node_ctx.prop_delta = !strcmp(val, "true");
361 } else if (key == keys.content_length) {
362 len = atoi(val);
363 t = buffer_read_line(&input);
364 if (!t)
365 die_short_read();
366 if (*t)
367 die("invalid dump: expected blank line after content length header");
368 if (active_ctx == REV_CTX) {
369 read_props();
370 } else if (active_ctx == NODE_CTX) {
371 handle_node();
372 active_ctx = REV_CTX;
373 } else {
374 fprintf(stderr, "Unexpected content length header: %"PRIu32"\n", len);
375 if (buffer_skip_bytes(&input, len) != len)
376 die_short_read();
377 }
378 }
379 }
380 if (buffer_ferror(&input))
381 die_short_read();
382 if (active_ctx == NODE_CTX)
383 handle_node();
384 if (active_ctx != DUMP_CTX)
385 handle_revision();
386}
387int svndump_init(const char *filename)
389{
390 if (buffer_init(&input, filename))
391 return error("cannot open %s: %s", filename, strerror(errno));
392 repo_init();
393 reset_dump_ctx(~0);
394 reset_rev_ctx(0);
395 reset_node_ctx(NULL);
396 init_keys();
397 return 0;
398}
399void svndump_deinit(void)
401{
402 log_reset();
403 repo_reset();
404 reset_dump_ctx(~0);
405 reset_rev_ctx(0);
406 reset_node_ctx(NULL);
407 if (buffer_deinit(&input))
408 fprintf(stderr, "Input error\n");
409 if (ferror(stdout))
410 fprintf(stderr, "Output error\n");
411}
412void svndump_reset(void)
414{
415 log_reset();
416 buffer_reset(&input);
417 repo_reset();
418 reset_dump_ctx(~0);
419 reset_rev_ctx(0);
420 reset_node_ctx(NULL);
421}