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 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 if (!type || t[1] != ' ')
175 die("invalid property line: %s\n", t);
176 len = atoi(&t[2]);
177 val = buffer_read_string(&input, len);
178 buffer_skip_bytes(&input, 1); /* Discard trailing newline. */
179 switch (type) {
181 case 'K':
182 key = pool_intern(val);
183 continue;
184 case 'D':
185 key = pool_intern(val);
186 val = NULL;
187 len = 0;
188 /* fall through */
189 case 'V':
190 handle_property(key, val, len, &type_set);
191 key = ~0;
192 continue;
193 default:
194 die("invalid property line: %s\n", t);
195 }
196 }
197}
198static void handle_node(void)
200{
201 uint32_t mark = 0;
202 const uint32_t type = node_ctx.type;
203 const int have_props = node_ctx.propLength != LENGTH_UNKNOWN;
204 const int have_text = node_ctx.textLength != LENGTH_UNKNOWN;
205 if (node_ctx.text_delta)
207 die("text deltas not supported");
208 if (have_text)
209 mark = next_blob_mark();
210 if (node_ctx.action == NODEACT_DELETE) {
211 if (have_text || have_props || node_ctx.srcRev)
212 die("invalid dump: deletion node has "
213 "copyfrom info, text, or properties");
214 return repo_delete(node_ctx.dst);
215 }
216 if (node_ctx.action == NODEACT_REPLACE) {
217 repo_delete(node_ctx.dst);
218 node_ctx.action = NODEACT_ADD;
219 }
220 if (node_ctx.srcRev) {
221 repo_copy(node_ctx.srcRev, node_ctx.src, node_ctx.dst);
222 if (node_ctx.action == NODEACT_ADD)
223 node_ctx.action = NODEACT_CHANGE;
224 }
225 if (have_text && type == REPO_MODE_DIR)
226 die("invalid dump: directories cannot have text attached");
227 /*
229 * Decide on the new content (mark) and mode (node_ctx.type).
230 */
231 if (node_ctx.action == NODEACT_CHANGE && !~*node_ctx.dst) {
232 if (type != REPO_MODE_DIR)
233 die("invalid dump: root of tree is not a regular file");
234 } else if (node_ctx.action == NODEACT_CHANGE) {
235 uint32_t mode;
236 if (!have_text)
237 mark = repo_read_path(node_ctx.dst);
238 mode = repo_read_mode(node_ctx.dst);
239 if (mode == REPO_MODE_DIR && type != REPO_MODE_DIR)
240 die("invalid dump: cannot modify a directory into a file");
241 if (mode != REPO_MODE_DIR && type == REPO_MODE_DIR)
242 die("invalid dump: cannot modify a file into a directory");
243 node_ctx.type = mode;
244 } else if (node_ctx.action == NODEACT_ADD) {
245 if (!have_text && type != REPO_MODE_DIR)
246 die("invalid dump: adds node without text");
247 } else {
248 die("invalid dump: Node-path block lacks Node-action");
249 }
250 /*
252 * Adjust mode to reflect properties.
253 */
254 if (have_props) {
255 if (!node_ctx.prop_delta)
256 node_ctx.type = type;
257 if (node_ctx.propLength)
258 read_props();
259 }
260 /*
262 * Save the result.
263 */
264 repo_add(node_ctx.dst, node_ctx.type, mark);
265 if (have_text)
266 fast_export_blob(node_ctx.type, mark,
267 node_ctx.textLength, &input);
268}
269static void handle_revision(void)
271{
272 if (rev_ctx.revision)
273 repo_commit(rev_ctx.revision, rev_ctx.author, rev_ctx.log,
274 dump_ctx.uuid, dump_ctx.url, rev_ctx.timestamp);
275}
276void svndump_read(const char *url)
278{
279 char *val;
280 char *t;
281 uint32_t active_ctx = DUMP_CTX;
282 uint32_t len;
283 uint32_t key;
284 reset_dump_ctx(pool_intern(url));
286 while ((t = buffer_read_line(&input))) {
287 val = strstr(t, ": ");
288 if (!val)
289 continue;
290 *val++ = '\0';
291 *val++ = '\0';
292 key = pool_intern(t);
293 if (key == keys.svn_fs_dump_format_version) {
295 dump_ctx.version = atoi(val);
296 if (dump_ctx.version > 3)
297 die("expected svn dump format version <= 3, found %"PRIu32,
298 dump_ctx.version);
299 } else if (key == keys.uuid) {
300 dump_ctx.uuid = pool_intern(val);
301 } else if (key == keys.revision_number) {
302 if (active_ctx == NODE_CTX)
303 handle_node();
304 if (active_ctx != DUMP_CTX)
305 handle_revision();
306 active_ctx = REV_CTX;
307 reset_rev_ctx(atoi(val));
308 } else if (key == keys.node_path) {
309 if (active_ctx == NODE_CTX)
310 handle_node();
311 active_ctx = NODE_CTX;
312 reset_node_ctx(val);
313 } else if (key == keys.node_kind) {
314 if (!strcmp(val, "dir"))
315 node_ctx.type = REPO_MODE_DIR;
316 else if (!strcmp(val, "file"))
317 node_ctx.type = REPO_MODE_BLB;
318 else
319 fprintf(stderr, "Unknown node-kind: %s\n", val);
320 } else if (key == keys.node_action) {
321 if (!strcmp(val, "delete")) {
322 node_ctx.action = NODEACT_DELETE;
323 } else if (!strcmp(val, "add")) {
324 node_ctx.action = NODEACT_ADD;
325 } else if (!strcmp(val, "change")) {
326 node_ctx.action = NODEACT_CHANGE;
327 } else if (!strcmp(val, "replace")) {
328 node_ctx.action = NODEACT_REPLACE;
329 } else {
330 fprintf(stderr, "Unknown node-action: %s\n", val);
331 node_ctx.action = NODEACT_UNKNOWN;
332 }
333 } else if (key == keys.node_copyfrom_path) {
334 pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.src, "/", val);
335 } else if (key == keys.node_copyfrom_rev) {
336 node_ctx.srcRev = atoi(val);
337 } else if (key == keys.text_content_length) {
338 node_ctx.textLength = atoi(val);
339 } else if (key == keys.prop_content_length) {
340 node_ctx.propLength = atoi(val);
341 } else if (key == keys.text_delta) {
342 node_ctx.text_delta = !strcmp(val, "true");
343 } else if (key == keys.prop_delta) {
344 node_ctx.prop_delta = !strcmp(val, "true");
345 } else if (key == keys.content_length) {
346 len = atoi(val);
347 buffer_read_line(&input);
348 if (active_ctx == REV_CTX) {
349 read_props();
350 } else if (active_ctx == NODE_CTX) {
351 handle_node();
352 active_ctx = REV_CTX;
353 } else {
354 fprintf(stderr, "Unexpected content length header: %"PRIu32"\n", len);
355 buffer_skip_bytes(&input, len);
356 }
357 }
358 }
359 if (active_ctx == NODE_CTX)
360 handle_node();
361 if (active_ctx != DUMP_CTX)
362 handle_revision();
363}
364int svndump_init(const char *filename)
366{
367 if (buffer_init(&input, filename))
368 return error("cannot open %s: %s", filename, strerror(errno));
369 repo_init();
370 reset_dump_ctx(~0);
371 reset_rev_ctx(0);
372 reset_node_ctx(NULL);
373 init_keys();
374 return 0;
375}
376void svndump_deinit(void)
378{
379 log_reset();
380 repo_reset();
381 reset_dump_ctx(~0);
382 reset_rev_ctx(0);
383 reset_node_ctx(NULL);
384 if (buffer_deinit(&input))
385 fprintf(stderr, "Input error\n");
386 if (ferror(stdout))
387 fprintf(stderr, "Output error\n");
388}
389void svndump_reset(void)
391{
392 log_reset();
393 buffer_reset(&input);
394 repo_reset();
395 reset_dump_ctx(~0);
396 reset_rev_ctx(0);
397 reset_node_ctx(NULL);
398}