5de8dadcddbdd6f6d462ae73ff9d9970f45d173a
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{
120 if (key == keys.svn_log) {
121 /* Value length excludes terminating nul. */
122 rev_ctx.log = log_copy(len + 1, val);
123 } else if (key == keys.svn_author) {
124 rev_ctx.author = pool_intern(val);
125 } else if (key == keys.svn_date) {
126 if (parse_date_basic(val, &rev_ctx.timestamp, NULL))
127 fprintf(stderr, "Invalid timestamp: %s\n", val);
128 } else if (key == keys.svn_executable) {
129 node_ctx.type = REPO_MODE_EXE;
130 } else if (key == keys.svn_special) {
131 node_ctx.type = REPO_MODE_LNK;
132 }
133}
134static void read_props(void)
136{
137 uint32_t len;
138 uint32_t key = ~0;
139 char *val = NULL;
140 char *t;
141 while ((t = buffer_read_line()) && strcmp(t, "PROPS-END")) {
142 if (!strncmp(t, "K ", 2)) {
143 len = atoi(&t[2]);
144 key = pool_intern(buffer_read_string(len));
145 buffer_read_line();
146 } else if (!strncmp(t, "V ", 2)) {
147 len = atoi(&t[2]);
148 val = buffer_read_string(len);
149 handle_property(key, val, len);
150 key = ~0;
151 buffer_read_line();
152 }
153 }
154}
155static void handle_node(void)
157{
158 uint32_t mark = 0;
159 const uint32_t type = node_ctx.type;
160 const int have_props = node_ctx.propLength != LENGTH_UNKNOWN;
161 if (node_ctx.text_delta || node_ctx.prop_delta)
163 die("text and property deltas not supported");
164 if (node_ctx.textLength != LENGTH_UNKNOWN)
165 mark = next_blob_mark();
166 if (node_ctx.action == NODEACT_DELETE) {
167 if (mark || have_props || node_ctx.srcRev)
168 die("invalid dump: deletion node has "
169 "copyfrom info, text, or properties");
170 return repo_delete(node_ctx.dst);
171 }
172 if (node_ctx.action == NODEACT_REPLACE) {
173 repo_delete(node_ctx.dst);
174 node_ctx.action = NODEACT_ADD;
175 }
176 if (node_ctx.srcRev) {
177 repo_copy(node_ctx.srcRev, node_ctx.src, node_ctx.dst);
178 if (node_ctx.action == NODEACT_ADD)
179 node_ctx.action = NODEACT_CHANGE;
180 }
181 if (mark && type == REPO_MODE_DIR)
182 die("invalid dump: directories cannot have text attached");
183 if (node_ctx.action == NODEACT_CHANGE) {
184 uint32_t mode = repo_modify_path(node_ctx.dst, 0, mark);
185 if (!mode)
186 die("invalid dump: path to be modified is missing");
187 if (mode == REPO_MODE_DIR && type != REPO_MODE_DIR)
188 die("invalid dump: cannot modify a directory into a file");
189 if (mode != REPO_MODE_DIR && type == REPO_MODE_DIR)
190 die("invalid dump: cannot modify a file into a directory");
191 node_ctx.type = mode;
192 } else if (node_ctx.action == NODEACT_ADD) {
193 if (!mark && type != REPO_MODE_DIR)
194 die("invalid dump: adds node without text");
195 repo_add(node_ctx.dst, type, mark);
196 } else {
197 die("invalid dump: Node-path block lacks Node-action");
198 }
199 if (have_props) {
200 const uint32_t old_mode = node_ctx.type;
201 node_ctx.type = type;
202 if (node_ctx.propLength)
203 read_props();
204 if (node_ctx.type != old_mode)
205 repo_modify_path(node_ctx.dst, node_ctx.type, mark);
206 }
207 if (mark)
208 fast_export_blob(node_ctx.type, mark, node_ctx.textLength);
209}
210static void handle_revision(void)
212{
213 if (rev_ctx.revision)
214 repo_commit(rev_ctx.revision, rev_ctx.author, rev_ctx.log,
215 dump_ctx.uuid, dump_ctx.url, rev_ctx.timestamp);
216}
217void svndump_read(const char *url)
219{
220 char *val;
221 char *t;
222 uint32_t active_ctx = DUMP_CTX;
223 uint32_t len;
224 uint32_t key;
225 reset_dump_ctx(pool_intern(url));
227 while ((t = buffer_read_line())) {
228 val = strstr(t, ": ");
229 if (!val)
230 continue;
231 *val++ = '\0';
232 *val++ = '\0';
233 key = pool_intern(t);
234 if (key == keys.svn_fs_dump_format_version) {
236 dump_ctx.version = atoi(val);
237 if (dump_ctx.version > 3)
238 die("expected svn dump format version <= 3, found %d",
239 dump_ctx.version);
240 } else if (key == keys.uuid) {
241 dump_ctx.uuid = pool_intern(val);
242 } else if (key == keys.revision_number) {
243 if (active_ctx == NODE_CTX)
244 handle_node();
245 if (active_ctx != DUMP_CTX)
246 handle_revision();
247 active_ctx = REV_CTX;
248 reset_rev_ctx(atoi(val));
249 } else if (key == keys.node_path) {
250 if (active_ctx == NODE_CTX)
251 handle_node();
252 active_ctx = NODE_CTX;
253 reset_node_ctx(val);
254 } else if (key == keys.node_kind) {
255 if (!strcmp(val, "dir"))
256 node_ctx.type = REPO_MODE_DIR;
257 else if (!strcmp(val, "file"))
258 node_ctx.type = REPO_MODE_BLB;
259 else
260 fprintf(stderr, "Unknown node-kind: %s\n", val);
261 } else if (key == keys.node_action) {
262 if (!strcmp(val, "delete")) {
263 node_ctx.action = NODEACT_DELETE;
264 } else if (!strcmp(val, "add")) {
265 node_ctx.action = NODEACT_ADD;
266 } else if (!strcmp(val, "change")) {
267 node_ctx.action = NODEACT_CHANGE;
268 } else if (!strcmp(val, "replace")) {
269 node_ctx.action = NODEACT_REPLACE;
270 } else {
271 fprintf(stderr, "Unknown node-action: %s\n", val);
272 node_ctx.action = NODEACT_UNKNOWN;
273 }
274 } else if (key == keys.node_copyfrom_path) {
275 pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.src, "/", val);
276 } else if (key == keys.node_copyfrom_rev) {
277 node_ctx.srcRev = atoi(val);
278 } else if (key == keys.text_content_length) {
279 node_ctx.textLength = atoi(val);
280 } else if (key == keys.prop_content_length) {
281 node_ctx.propLength = atoi(val);
282 } else if (key == keys.text_delta) {
283 node_ctx.text_delta = !strcmp(val, "true");
284 } else if (key == keys.prop_delta) {
285 node_ctx.prop_delta = !strcmp(val, "true");
286 } else if (key == keys.content_length) {
287 len = atoi(val);
288 buffer_read_line();
289 if (active_ctx == REV_CTX) {
290 read_props();
291 } else if (active_ctx == NODE_CTX) {
292 handle_node();
293 active_ctx = REV_CTX;
294 } else {
295 fprintf(stderr, "Unexpected content length header: %"PRIu32"\n", len);
296 buffer_skip_bytes(len);
297 }
298 }
299 }
300 if (active_ctx == NODE_CTX)
301 handle_node();
302 if (active_ctx != DUMP_CTX)
303 handle_revision();
304}
305int svndump_init(const char *filename)
307{
308 if (buffer_init(filename))
309 return error("cannot open %s: %s", filename, strerror(errno));
310 repo_init();
311 reset_dump_ctx(~0);
312 reset_rev_ctx(0);
313 reset_node_ctx(NULL);
314 init_keys();
315 return 0;
316}
317void svndump_deinit(void)
319{
320 log_reset();
321 repo_reset();
322 reset_dump_ctx(~0);
323 reset_rev_ctx(0);
324 reset_node_ctx(NULL);
325 if (buffer_deinit())
326 fprintf(stderr, "Input error\n");
327 if (ferror(stdout))
328 fprintf(stderr, "Output error\n");
329}
330void svndump_reset(void)
332{
333 log_reset();
334 buffer_reset();
335 repo_reset();
336 reset_dump_ctx(~0);
337 reset_rev_ctx(0);
338 reset_node_ctx(NULL);
339}