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"
15 #include "string_pool.h"
17 #define NODEACT_REPLACE 4
18 #define NODEACT_DELETE 3
20 #define NODEACT_CHANGE 1
21 #define NODEACT_UNKNOWN 0
27 #define LENGTH_UNKNOWN (~0)
28 #define DATE_RFC2822_LEN 31
30 /* Create memory pool for log messages */
31 obj_pool_gen(log, char, 4096)
33 static struct line_buffer input = LINE_BUFFER_INIT;
35 static char *log_copy(uint32_t length, const char *log)
38 log_free(log_pool.size);
39 buffer = log_pointer(log_alloc(length));
40 strncpy(buffer, log, length);
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;
51 uint32_t revision, author;
52 unsigned long timestamp;
57 uint32_t version, uuid, url;
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;
69 static void reset_node_ctx(char *fname)
72 node_ctx.action = NODEACT_UNKNOWN;
73 node_ctx.propLength = LENGTH_UNKNOWN;
74 node_ctx.textLength = LENGTH_UNKNOWN;
77 pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.dst, "/", fname);
78 node_ctx.text_delta = 0;
79 node_ctx.prop_delta = 0;
82 static void reset_rev_ctx(uint32_t revision)
84 rev_ctx.revision = revision;
85 rev_ctx.timestamp = 0;
90 static void reset_dump_ctx(uint32_t url)
97 static void init_keys(void)
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");
120 static void handle_property(uint32_t key, const char *val, uint32_t len,
123 if (key == keys.svn_log) {
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) {
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) {
139 die("invalid dump: sets type twice");
142 node_ctx.type = REPO_MODE_BLB;
146 node_ctx.type = key == keys.svn_executable ?
152 static void die_short_read(void)
154 if (buffer_ferror(&input))
155 die_errno("error reading dump file");
156 die("invalid dump: unexpected end of file");
159 static void read_props(void)
164 * NEEDSWORK: to support simple mode changes like
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.
175 uint32_t type_set = 0;
176 while ((t = buffer_read_line(&input)) && strcmp(t, "PROPS-END")) {
179 const char type = t[0];
182 if (!type || t[1] != ' ')
183 die("invalid property line: %s\n", t);
185 val = buffer_read_string(&input, len);
186 if (!val || strlen(val) != len)
189 /* Discard trailing newline. */
190 ch = buffer_read_char(&input);
194 die("invalid dump: expected newline after %s", val);
198 key = pool_intern(val);
201 key = pool_intern(val);
206 handle_property(key, val, len, &type_set);
210 die("invalid property line: %s\n", t);
215 static void handle_node(void)
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;
222 if (node_ctx.text_delta)
223 die("text deltas not supported");
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);
232 if (node_ctx.action == NODEACT_REPLACE) {
233 repo_delete(node_ctx.dst);
234 node_ctx.action = NODEACT_ADD;
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;
241 if (have_text && type == REPO_MODE_DIR)
242 die("invalid dump: directories cannot have text attached");
245 * Decide on the new content (mark) and mode (node_ctx.type).
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) {
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");
264 die("invalid dump: Node-path block lacks Node-action");
268 * Adjust mode to reflect properties.
271 if (!node_ctx.prop_delta)
272 node_ctx.type = type;
273 if (node_ctx.propLength)
280 repo_add(node_ctx.dst, node_ctx.type, mark);
282 fast_export_blob(node_ctx.type, mark,
283 node_ctx.textLength, &input);
286 static void handle_revision(void)
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);
293 void svndump_read(const char *url)
297 uint32_t active_ctx = DUMP_CTX;
301 reset_dump_ctx(pool_intern(url));
302 while ((t = buffer_read_line(&input))) {
303 val = strstr(t, ": ");
308 key = pool_intern(t);
310 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,
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)
320 if (active_ctx != DUMP_CTX)
322 active_ctx = REV_CTX;
323 reset_rev_ctx(atoi(val));
324 } else if (key == keys.node_path) {
325 if (active_ctx == NODE_CTX)
327 active_ctx = NODE_CTX;
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;
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;
346 fprintf(stderr, "Unknown node-action: %s\n", val);
347 node_ctx.action = NODEACT_UNKNOWN;
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) {
363 t = buffer_read_line(&input);
367 die("invalid dump: expected blank line after content length header");
368 if (active_ctx == REV_CTX) {
370 } else if (active_ctx == NODE_CTX) {
372 active_ctx = REV_CTX;
374 fprintf(stderr, "Unexpected content length header: %"PRIu32"\n", len);
375 if (buffer_skip_bytes(&input, len) != len)
380 if (buffer_ferror(&input))
382 if (active_ctx == NODE_CTX)
384 if (active_ctx != DUMP_CTX)
388 int svndump_init(const char *filename)
390 if (buffer_init(&input, filename))
391 return error("cannot open %s: %s", filename, strerror(errno));
395 reset_node_ctx(NULL);
400 void svndump_deinit(void)
406 reset_node_ctx(NULL);
407 if (buffer_deinit(&input))
408 fprintf(stderr, "Input error\n");
410 fprintf(stderr, "Output error\n");
413 void svndump_reset(void)
416 buffer_reset(&input);
420 reset_node_ctx(NULL);