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 char *log_copy(uint32_t length, const char *log)
34{
35 char *buffer;
36 log_free(log_pool.size);
37 buffer = log_pointer(log_alloc(length));
38 strncpy(buffer, log, length);
39 return buffer;
40}
41static struct {
43 uint32_t action, propLength, textLength, srcRev, type;
44 uint32_t src[REPO_MAX_PATH_DEPTH], dst[REPO_MAX_PATH_DEPTH];
45 uint32_t text_delta, prop_delta;
46} node_ctx;
47static struct {
49 uint32_t revision, author;
50 unsigned long timestamp;
51 char *log;
52} rev_ctx;
53static struct {
55 uint32_t version, uuid, url;
56} dump_ctx;
57static struct {
59 uint32_t svn_log, svn_author, svn_date, svn_executable, svn_special, uuid,
60 revision_number, node_path, node_kind, node_action,
61 node_copyfrom_path, node_copyfrom_rev, text_content_length,
62 prop_content_length, content_length, svn_fs_dump_format_version,
63 /* version 3 format */
64 text_delta, prop_delta;
65} keys;
66static void reset_node_ctx(char *fname)
68{
69 node_ctx.type = 0;
70 node_ctx.action = NODEACT_UNKNOWN;
71 node_ctx.propLength = LENGTH_UNKNOWN;
72 node_ctx.textLength = LENGTH_UNKNOWN;
73 node_ctx.src[0] = ~0;
74 node_ctx.srcRev = 0;
75 pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.dst, "/", fname);
76 node_ctx.text_delta = 0;
77 node_ctx.prop_delta = 0;
78}
79static void reset_rev_ctx(uint32_t revision)
81{
82 rev_ctx.revision = revision;
83 rev_ctx.timestamp = 0;
84 rev_ctx.log = NULL;
85 rev_ctx.author = ~0;
86}
87static void reset_dump_ctx(uint32_t url)
89{
90 dump_ctx.url = url;
91 dump_ctx.version = 1;
92 dump_ctx.uuid = ~0;
93}
94static void init_keys(void)
96{
97 keys.svn_log = pool_intern("svn:log");
98 keys.svn_author = pool_intern("svn:author");
99 keys.svn_date = pool_intern("svn:date");
100 keys.svn_executable = pool_intern("svn:executable");
101 keys.svn_special = pool_intern("svn:special");
102 keys.uuid = pool_intern("UUID");
103 keys.revision_number = pool_intern("Revision-number");
104 keys.node_path = pool_intern("Node-path");
105 keys.node_kind = pool_intern("Node-kind");
106 keys.node_action = pool_intern("Node-action");
107 keys.node_copyfrom_path = pool_intern("Node-copyfrom-path");
108 keys.node_copyfrom_rev = pool_intern("Node-copyfrom-rev");
109 keys.text_content_length = pool_intern("Text-content-length");
110 keys.prop_content_length = pool_intern("Prop-content-length");
111 keys.content_length = pool_intern("Content-length");
112 keys.svn_fs_dump_format_version = pool_intern("SVN-fs-dump-format-version");
113 /* version 3 format (Subversion 1.1.0) */
114 keys.text_delta = pool_intern("Text-delta");
115 keys.prop_delta = pool_intern("Prop-delta");
116}
117static void handle_property(uint32_t key, const char *val, uint32_t len,
119 uint32_t *type_set)
120{
121 if (key == keys.svn_log) {
122 if (!val)
123 die("invalid dump: unsets svn:log");
124 /* Value length excludes terminating nul. */
125 rev_ctx.log = log_copy(len + 1, val);
126 } else if (key == keys.svn_author) {
127 rev_ctx.author = pool_intern(val);
128 } else if (key == keys.svn_date) {
129 if (!val)
130 die("invalid dump: unsets svn:date");
131 if (parse_date_basic(val, &rev_ctx.timestamp, NULL))
132 warning("invalid timestamp: %s", val);
133 } else if (key == keys.svn_executable || key == keys.svn_special) {
134 if (*type_set) {
135 if (!val)
136 return;
137 die("invalid dump: sets type twice");
138 }
139 if (!val) {
140 node_ctx.type = REPO_MODE_BLB;
141 return;
142 }
143 *type_set = 1;
144 node_ctx.type = key == keys.svn_executable ?
145 REPO_MODE_EXE :
146 REPO_MODE_LNK;
147 }
148}
149static void read_props(void)
151{
152 uint32_t key = ~0;
153 const char *t;
154 /*
155 * NEEDSWORK: to support simple mode changes like
156 * K 11
157 * svn:special
158 * V 1
159 * *
160 * D 14
161 * svn:executable
162 * we keep track of whether a mode has been set and reset to
163 * plain file only if not. We should be keeping track of the
164 * symlink and executable bits separately instead.
165 */
166 uint32_t type_set = 0;
167 while ((t = buffer_read_line()) && strcmp(t, "PROPS-END")) {
168 uint32_t len;
169 const char *val;
170 const char type = t[0];
171 if (!type || t[1] != ' ')
173 die("invalid property line: %s\n", t);
174 len = atoi(&t[2]);
175 val = buffer_read_string(len);
176 buffer_skip_bytes(1); /* Discard trailing newline. */
177 switch (type) {
179 case 'K':
180 key = pool_intern(val);
181 continue;
182 case 'D':
183 key = pool_intern(val);
184 val = NULL;
185 len = 0;
186 /* fall through */
187 case 'V':
188 handle_property(key, val, len, &type_set);
189 key = ~0;
190 continue;
191 default:
192 die("invalid property line: %s\n", t);
193 }
194 }
195}
196static void handle_node(void)
198{
199 uint32_t mark = 0;
200 const uint32_t type = node_ctx.type;
201 const int have_props = node_ctx.propLength != LENGTH_UNKNOWN;
202 if (node_ctx.text_delta)
204 die("text deltas not supported");
205 if (node_ctx.textLength != LENGTH_UNKNOWN)
206 mark = next_blob_mark();
207 if (node_ctx.action == NODEACT_DELETE) {
208 if (mark || have_props || node_ctx.srcRev)
209 die("invalid dump: deletion node has "
210 "copyfrom info, text, or properties");
211 return repo_delete(node_ctx.dst);
212 }
213 if (node_ctx.action == NODEACT_REPLACE) {
214 repo_delete(node_ctx.dst);
215 node_ctx.action = NODEACT_ADD;
216 }
217 if (node_ctx.srcRev) {
218 repo_copy(node_ctx.srcRev, node_ctx.src, node_ctx.dst);
219 if (node_ctx.action == NODEACT_ADD)
220 node_ctx.action = NODEACT_CHANGE;
221 }
222 if (mark && type == REPO_MODE_DIR)
223 die("invalid dump: directories cannot have text attached");
224 if (node_ctx.action == NODEACT_CHANGE && !~*node_ctx.dst) {
225 if (type != REPO_MODE_DIR)
226 die("invalid dump: root of tree is not a regular file");
227 } else if (node_ctx.action == NODEACT_CHANGE) {
228 uint32_t mode = repo_modify_path(node_ctx.dst, 0, mark);
229 if (!mode)
230 die("invalid dump: path to be modified is missing");
231 if (mode == REPO_MODE_DIR && type != REPO_MODE_DIR)
232 die("invalid dump: cannot modify a directory into a file");
233 if (mode != REPO_MODE_DIR && type == REPO_MODE_DIR)
234 die("invalid dump: cannot modify a file into a directory");
235 node_ctx.type = mode;
236 } else if (node_ctx.action == NODEACT_ADD) {
237 if (!mark && type != REPO_MODE_DIR)
238 die("invalid dump: adds node without text");
239 repo_add(node_ctx.dst, type, mark);
240 } else {
241 die("invalid dump: Node-path block lacks Node-action");
242 }
243 if (have_props) {
244 const uint32_t old_mode = node_ctx.type;
245 if (!node_ctx.prop_delta)
246 node_ctx.type = type;
247 if (node_ctx.propLength)
248 read_props();
249 if (node_ctx.type != old_mode)
250 repo_modify_path(node_ctx.dst, node_ctx.type, mark);
251 }
252 if (mark)
253 fast_export_blob(node_ctx.type, mark, node_ctx.textLength);
254}
255static void handle_revision(void)
257{
258 if (rev_ctx.revision)
259 repo_commit(rev_ctx.revision, rev_ctx.author, rev_ctx.log,
260 dump_ctx.uuid, dump_ctx.url, rev_ctx.timestamp);
261}
262void svndump_read(const char *url)
264{
265 char *val;
266 char *t;
267 uint32_t active_ctx = DUMP_CTX;
268 uint32_t len;
269 uint32_t key;
270 reset_dump_ctx(pool_intern(url));
272 while ((t = buffer_read_line())) {
273 val = strstr(t, ": ");
274 if (!val)
275 continue;
276 *val++ = '\0';
277 *val++ = '\0';
278 key = pool_intern(t);
279 if (key == keys.svn_fs_dump_format_version) {
281 dump_ctx.version = atoi(val);
282 if (dump_ctx.version > 3)
283 die("expected svn dump format version <= 3, found %d",
284 dump_ctx.version);
285 } else if (key == keys.uuid) {
286 dump_ctx.uuid = pool_intern(val);
287 } else if (key == keys.revision_number) {
288 if (active_ctx == NODE_CTX)
289 handle_node();
290 if (active_ctx != DUMP_CTX)
291 handle_revision();
292 active_ctx = REV_CTX;
293 reset_rev_ctx(atoi(val));
294 } else if (key == keys.node_path) {
295 if (active_ctx == NODE_CTX)
296 handle_node();
297 active_ctx = NODE_CTX;
298 reset_node_ctx(val);
299 } else if (key == keys.node_kind) {
300 if (!strcmp(val, "dir"))
301 node_ctx.type = REPO_MODE_DIR;
302 else if (!strcmp(val, "file"))
303 node_ctx.type = REPO_MODE_BLB;
304 else
305 fprintf(stderr, "Unknown node-kind: %s\n", val);
306 } else if (key == keys.node_action) {
307 if (!strcmp(val, "delete")) {
308 node_ctx.action = NODEACT_DELETE;
309 } else if (!strcmp(val, "add")) {
310 node_ctx.action = NODEACT_ADD;
311 } else if (!strcmp(val, "change")) {
312 node_ctx.action = NODEACT_CHANGE;
313 } else if (!strcmp(val, "replace")) {
314 node_ctx.action = NODEACT_REPLACE;
315 } else {
316 fprintf(stderr, "Unknown node-action: %s\n", val);
317 node_ctx.action = NODEACT_UNKNOWN;
318 }
319 } else if (key == keys.node_copyfrom_path) {
320 pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.src, "/", val);
321 } else if (key == keys.node_copyfrom_rev) {
322 node_ctx.srcRev = atoi(val);
323 } else if (key == keys.text_content_length) {
324 node_ctx.textLength = atoi(val);
325 } else if (key == keys.prop_content_length) {
326 node_ctx.propLength = atoi(val);
327 } else if (key == keys.text_delta) {
328 node_ctx.text_delta = !strcmp(val, "true");
329 } else if (key == keys.prop_delta) {
330 node_ctx.prop_delta = !strcmp(val, "true");
331 } else if (key == keys.content_length) {
332 len = atoi(val);
333 buffer_read_line();
334 if (active_ctx == REV_CTX) {
335 read_props();
336 } else if (active_ctx == NODE_CTX) {
337 handle_node();
338 active_ctx = REV_CTX;
339 } else {
340 fprintf(stderr, "Unexpected content length header: %"PRIu32"\n", len);
341 buffer_skip_bytes(len);
342 }
343 }
344 }
345 if (active_ctx == NODE_CTX)
346 handle_node();
347 if (active_ctx != DUMP_CTX)
348 handle_revision();
349}
350int svndump_init(const char *filename)
352{
353 if (buffer_init(filename))
354 return error("cannot open %s: %s", filename, strerror(errno));
355 repo_init();
356 reset_dump_ctx(~0);
357 reset_rev_ctx(0);
358 reset_node_ctx(NULL);
359 init_keys();
360 return 0;
361}
362void svndump_deinit(void)
364{
365 log_reset();
366 repo_reset();
367 reset_dump_ctx(~0);
368 reset_rev_ctx(0);
369 reset_node_ctx(NULL);
370 if (buffer_deinit())
371 fprintf(stderr, "Input error\n");
372 if (ferror(stdout))
373 fprintf(stderr, "Output error\n");
374}
375void svndump_reset(void)
377{
378 log_reset();
379 buffer_reset();
380 repo_reset();
381 reset_dump_ctx(~0);
382 reset_rev_ctx(0);
383 reset_node_ctx(NULL);
384}