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 "string_pool.h"
15#include "strbuf.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
29static struct line_buffer input = LINE_BUFFER_INIT;
31static struct {
33 uint32_t action, propLength, textLength, srcRev, type;
34 uint32_t src[REPO_MAX_PATH_DEPTH], dst[REPO_MAX_PATH_DEPTH];
35 uint32_t text_delta, prop_delta;
36} node_ctx;
37static struct {
39 uint32_t revision;
40 unsigned long timestamp;
41 struct strbuf log, author;
42} rev_ctx;
43static struct {
45 uint32_t version;
46 struct strbuf uuid, url;
47} dump_ctx;
48static struct {
50 uint32_t svn_log, svn_author, svn_date, svn_executable, svn_special, uuid,
51 revision_number, node_path, node_kind, node_action,
52 node_copyfrom_path, node_copyfrom_rev, text_content_length,
53 prop_content_length, content_length, svn_fs_dump_format_version,
54 /* version 3 format */
55 text_delta, prop_delta;
56} keys;
57static void reset_node_ctx(char *fname)
59{
60 node_ctx.type = 0;
61 node_ctx.action = NODEACT_UNKNOWN;
62 node_ctx.propLength = LENGTH_UNKNOWN;
63 node_ctx.textLength = LENGTH_UNKNOWN;
64 node_ctx.src[0] = ~0;
65 node_ctx.srcRev = 0;
66 pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.dst, "/", fname);
67 node_ctx.text_delta = 0;
68 node_ctx.prop_delta = 0;
69}
70static void reset_rev_ctx(uint32_t revision)
72{
73 rev_ctx.revision = revision;
74 rev_ctx.timestamp = 0;
75 strbuf_reset(&rev_ctx.log);
76 strbuf_reset(&rev_ctx.author);
77}
78static void reset_dump_ctx(const char *url)
80{
81 strbuf_reset(&dump_ctx.url);
82 if (url)
83 strbuf_addstr(&dump_ctx.url, url);
84 dump_ctx.version = 1;
85 strbuf_reset(&dump_ctx.uuid);
86}
87static void init_keys(void)
89{
90 keys.svn_log = pool_intern("svn:log");
91 keys.svn_author = pool_intern("svn:author");
92 keys.svn_date = pool_intern("svn:date");
93 keys.svn_executable = pool_intern("svn:executable");
94 keys.svn_special = pool_intern("svn:special");
95 keys.uuid = pool_intern("UUID");
96 keys.revision_number = pool_intern("Revision-number");
97 keys.node_path = pool_intern("Node-path");
98 keys.node_kind = pool_intern("Node-kind");
99 keys.node_action = pool_intern("Node-action");
100 keys.node_copyfrom_path = pool_intern("Node-copyfrom-path");
101 keys.node_copyfrom_rev = pool_intern("Node-copyfrom-rev");
102 keys.text_content_length = pool_intern("Text-content-length");
103 keys.prop_content_length = pool_intern("Prop-content-length");
104 keys.content_length = pool_intern("Content-length");
105 keys.svn_fs_dump_format_version = pool_intern("SVN-fs-dump-format-version");
106 /* version 3 format (Subversion 1.1.0) */
107 keys.text_delta = pool_intern("Text-delta");
108 keys.prop_delta = pool_intern("Prop-delta");
109}
110static void handle_property(uint32_t key, const char *val, uint32_t len,
112 uint32_t *type_set)
113{
114 if (key == keys.svn_log) {
115 if (!val)
116 die("invalid dump: unsets svn:log");
117 strbuf_reset(&rev_ctx.log);
118 strbuf_add(&rev_ctx.log, val, len);
119 } else if (key == keys.svn_author) {
120 strbuf_reset(&rev_ctx.author);
121 if (val)
122 strbuf_add(&rev_ctx.author, val, len);
123 } else if (key == keys.svn_date) {
124 if (!val)
125 die("invalid dump: unsets svn:date");
126 if (parse_date_basic(val, &rev_ctx.timestamp, NULL))
127 warning("invalid timestamp: %s", val);
128 } else if (key == keys.svn_executable || key == keys.svn_special) {
129 if (*type_set) {
130 if (!val)
131 return;
132 die("invalid dump: sets type twice");
133 }
134 if (!val) {
135 node_ctx.type = REPO_MODE_BLB;
136 return;
137 }
138 *type_set = 1;
139 node_ctx.type = key == keys.svn_executable ?
140 REPO_MODE_EXE :
141 REPO_MODE_LNK;
142 }
143}
144static void die_short_read(void)
146{
147 if (buffer_ferror(&input))
148 die_errno("error reading dump file");
149 die("invalid dump: unexpected end of file");
150}
151static void read_props(void)
153{
154 uint32_t key = ~0;
155 const char *t;
156 /*
157 * NEEDSWORK: to support simple mode changes like
158 * K 11
159 * svn:special
160 * V 1
161 * *
162 * D 14
163 * svn:executable
164 * we keep track of whether a mode has been set and reset to
165 * plain file only if not. We should be keeping track of the
166 * symlink and executable bits separately instead.
167 */
168 uint32_t type_set = 0;
169 while ((t = buffer_read_line(&input)) && strcmp(t, "PROPS-END")) {
170 uint32_t len;
171 const char *val;
172 const char type = t[0];
173 int ch;
174 if (!type || t[1] != ' ')
176 die("invalid property line: %s\n", t);
177 len = atoi(&t[2]);
178 val = buffer_read_string(&input, len);
179 if (!val || strlen(val) != len)
180 die_short_read();
181 /* Discard trailing newline. */
183 ch = buffer_read_char(&input);
184 if (ch == EOF)
185 die_short_read();
186 if (ch != '\n')
187 die("invalid dump: expected newline after %s", val);
188 switch (type) {
190 case 'K':
191 key = pool_intern(val);
192 continue;
193 case 'D':
194 key = pool_intern(val);
195 val = NULL;
196 len = 0;
197 /* fall through */
198 case 'V':
199 handle_property(key, val, len, &type_set);
200 key = ~0;
201 continue;
202 default:
203 die("invalid property line: %s\n", t);
204 }
205 }
206}
207static void handle_node(void)
209{
210 uint32_t mark = 0;
211 const uint32_t type = node_ctx.type;
212 const int have_props = node_ctx.propLength != LENGTH_UNKNOWN;
213 const int have_text = node_ctx.textLength != LENGTH_UNKNOWN;
214 if (node_ctx.text_delta)
216 die("text deltas not supported");
217 if (have_text)
218 mark = next_blob_mark();
219 if (node_ctx.action == NODEACT_DELETE) {
220 if (have_text || have_props || node_ctx.srcRev)
221 die("invalid dump: deletion node has "
222 "copyfrom info, text, or properties");
223 return repo_delete(node_ctx.dst);
224 }
225 if (node_ctx.action == NODEACT_REPLACE) {
226 repo_delete(node_ctx.dst);
227 node_ctx.action = NODEACT_ADD;
228 }
229 if (node_ctx.srcRev) {
230 repo_copy(node_ctx.srcRev, node_ctx.src, node_ctx.dst);
231 if (node_ctx.action == NODEACT_ADD)
232 node_ctx.action = NODEACT_CHANGE;
233 }
234 if (have_text && type == REPO_MODE_DIR)
235 die("invalid dump: directories cannot have text attached");
236 /*
238 * Decide on the new content (mark) and mode (node_ctx.type).
239 */
240 if (node_ctx.action == NODEACT_CHANGE && !~*node_ctx.dst) {
241 if (type != REPO_MODE_DIR)
242 die("invalid dump: root of tree is not a regular file");
243 } else if (node_ctx.action == NODEACT_CHANGE) {
244 uint32_t mode;
245 if (!have_text)
246 mark = repo_read_path(node_ctx.dst);
247 mode = repo_read_mode(node_ctx.dst);
248 if (mode == REPO_MODE_DIR && type != REPO_MODE_DIR)
249 die("invalid dump: cannot modify a directory into a file");
250 if (mode != REPO_MODE_DIR && type == REPO_MODE_DIR)
251 die("invalid dump: cannot modify a file into a directory");
252 node_ctx.type = mode;
253 } else if (node_ctx.action == NODEACT_ADD) {
254 if (!have_text && type != REPO_MODE_DIR)
255 die("invalid dump: adds node without text");
256 } else {
257 die("invalid dump: Node-path block lacks Node-action");
258 }
259 /*
261 * Adjust mode to reflect properties.
262 */
263 if (have_props) {
264 if (!node_ctx.prop_delta)
265 node_ctx.type = type;
266 if (node_ctx.propLength)
267 read_props();
268 }
269 /*
271 * Save the result.
272 */
273 repo_add(node_ctx.dst, node_ctx.type, mark);
274 if (have_text)
275 fast_export_blob(node_ctx.type, mark,
276 node_ctx.textLength, &input);
277}
278static void handle_revision(void)
280{
281 if (rev_ctx.revision)
282 repo_commit(rev_ctx.revision, rev_ctx.author.buf,
283 rev_ctx.log.buf, dump_ctx.uuid.buf, dump_ctx.url.buf,
284 rev_ctx.timestamp);
285}
286void svndump_read(const char *url)
288{
289 char *val;
290 char *t;
291 uint32_t active_ctx = DUMP_CTX;
292 uint32_t len;
293 uint32_t key;
294 reset_dump_ctx(url);
296 while ((t = buffer_read_line(&input))) {
297 val = strstr(t, ": ");
298 if (!val)
299 continue;
300 *val++ = '\0';
301 *val++ = '\0';
302 key = pool_intern(t);
303 if (key == keys.svn_fs_dump_format_version) {
305 dump_ctx.version = atoi(val);
306 if (dump_ctx.version > 3)
307 die("expected svn dump format version <= 3, found %"PRIu32,
308 dump_ctx.version);
309 } else if (key == keys.uuid) {
310 strbuf_reset(&dump_ctx.uuid);
311 strbuf_addstr(&dump_ctx.uuid, val);
312 } else if (key == keys.revision_number) {
313 if (active_ctx == NODE_CTX)
314 handle_node();
315 if (active_ctx != DUMP_CTX)
316 handle_revision();
317 active_ctx = REV_CTX;
318 reset_rev_ctx(atoi(val));
319 } else if (key == keys.node_path) {
320 if (active_ctx == NODE_CTX)
321 handle_node();
322 active_ctx = NODE_CTX;
323 reset_node_ctx(val);
324 } else if (key == keys.node_kind) {
325 if (!strcmp(val, "dir"))
326 node_ctx.type = REPO_MODE_DIR;
327 else if (!strcmp(val, "file"))
328 node_ctx.type = REPO_MODE_BLB;
329 else
330 fprintf(stderr, "Unknown node-kind: %s\n", val);
331 } else if (key == keys.node_action) {
332 if (!strcmp(val, "delete")) {
333 node_ctx.action = NODEACT_DELETE;
334 } else if (!strcmp(val, "add")) {
335 node_ctx.action = NODEACT_ADD;
336 } else if (!strcmp(val, "change")) {
337 node_ctx.action = NODEACT_CHANGE;
338 } else if (!strcmp(val, "replace")) {
339 node_ctx.action = NODEACT_REPLACE;
340 } else {
341 fprintf(stderr, "Unknown node-action: %s\n", val);
342 node_ctx.action = NODEACT_UNKNOWN;
343 }
344 } else if (key == keys.node_copyfrom_path) {
345 pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.src, "/", val);
346 } else if (key == keys.node_copyfrom_rev) {
347 node_ctx.srcRev = atoi(val);
348 } else if (key == keys.text_content_length) {
349 node_ctx.textLength = atoi(val);
350 } else if (key == keys.prop_content_length) {
351 node_ctx.propLength = atoi(val);
352 } else if (key == keys.text_delta) {
353 node_ctx.text_delta = !strcmp(val, "true");
354 } else if (key == keys.prop_delta) {
355 node_ctx.prop_delta = !strcmp(val, "true");
356 } else if (key == keys.content_length) {
357 len = atoi(val);
358 t = buffer_read_line(&input);
359 if (!t)
360 die_short_read();
361 if (*t)
362 die("invalid dump: expected blank line after content length header");
363 if (active_ctx == REV_CTX) {
364 read_props();
365 } else if (active_ctx == NODE_CTX) {
366 handle_node();
367 active_ctx = REV_CTX;
368 } else {
369 fprintf(stderr, "Unexpected content length header: %"PRIu32"\n", len);
370 if (buffer_skip_bytes(&input, len) != len)
371 die_short_read();
372 }
373 }
374 }
375 if (buffer_ferror(&input))
376 die_short_read();
377 if (active_ctx == NODE_CTX)
378 handle_node();
379 if (active_ctx != DUMP_CTX)
380 handle_revision();
381}
382int svndump_init(const char *filename)
384{
385 if (buffer_init(&input, filename))
386 return error("cannot open %s: %s", filename, strerror(errno));
387 repo_init();
388 strbuf_init(&dump_ctx.uuid, 4096);
389 strbuf_init(&dump_ctx.url, 4096);
390 strbuf_init(&rev_ctx.log, 4096);
391 strbuf_init(&rev_ctx.author, 4096);
392 reset_dump_ctx(NULL);
393 reset_rev_ctx(0);
394 reset_node_ctx(NULL);
395 init_keys();
396 return 0;
397}
398void svndump_deinit(void)
400{
401 repo_reset();
402 reset_dump_ctx(NULL);
403 reset_rev_ctx(0);
404 reset_node_ctx(NULL);
405 strbuf_release(&rev_ctx.log);
406 if (buffer_deinit(&input))
407 fprintf(stderr, "Input error\n");
408 if (ferror(stdout))
409 fprintf(stderr, "Output error\n");
410}
411void svndump_reset(void)
413{
414 buffer_reset(&input);
415 repo_reset();
416 strbuf_release(&dump_ctx.uuid);
417 strbuf_release(&dump_ctx.url);
418 strbuf_release(&rev_ctx.log);
419 strbuf_release(&rev_ctx.author);
420}