Merge branch 'cb/setup'
[git] / vcs-svn / svndump.c
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
10 #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
17 #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
23 #define DUMP_CTX 0
24 #define REV_CTX  1
25 #define NODE_CTX 2
26
27 #define LENGTH_UNKNOWN (~0)
28 #define DATE_RFC2822_LEN 31
29
30 /* Create memory pool for log messages */
31 obj_pool_gen(log, char, 4096)
32
33 static char* log_copy(uint32_t length, 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 }
41
42 static struct {
43         uint32_t action, propLength, textLength, srcRev, srcMode, mark, type;
44         uint32_t src[REPO_MAX_PATH_DEPTH], dst[REPO_MAX_PATH_DEPTH];
45 } node_ctx;
46
47 static struct {
48         uint32_t revision, author;
49         unsigned long timestamp;
50         char *log;
51 } rev_ctx;
52
53 static struct {
54         uint32_t version, uuid, url;
55 } dump_ctx;
56
57 static struct {
58         uint32_t svn_log, svn_author, svn_date, svn_executable, svn_special, uuid,
59                 revision_number, node_path, node_kind, node_action,
60                 node_copyfrom_path, node_copyfrom_rev, text_content_length,
61                 prop_content_length, content_length, svn_fs_dump_format_version;
62 } keys;
63
64 static void reset_node_ctx(char *fname)
65 {
66         node_ctx.type = 0;
67         node_ctx.action = NODEACT_UNKNOWN;
68         node_ctx.propLength = LENGTH_UNKNOWN;
69         node_ctx.textLength = LENGTH_UNKNOWN;
70         node_ctx.src[0] = ~0;
71         node_ctx.srcRev = 0;
72         node_ctx.srcMode = 0;
73         pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.dst, "/", fname);
74         node_ctx.mark = 0;
75 }
76
77 static void reset_rev_ctx(uint32_t revision)
78 {
79         rev_ctx.revision = revision;
80         rev_ctx.timestamp = 0;
81         rev_ctx.log = NULL;
82         rev_ctx.author = ~0;
83 }
84
85 static void reset_dump_ctx(uint32_t url)
86 {
87         dump_ctx.url = url;
88         dump_ctx.version = 1;
89         dump_ctx.uuid = ~0;
90 }
91
92 static void init_keys(void)
93 {
94         keys.svn_log = pool_intern("svn:log");
95         keys.svn_author = pool_intern("svn:author");
96         keys.svn_date = pool_intern("svn:date");
97         keys.svn_executable = pool_intern("svn:executable");
98         keys.svn_special = pool_intern("svn:special");
99         keys.uuid = pool_intern("UUID");
100         keys.revision_number = pool_intern("Revision-number");
101         keys.node_path = pool_intern("Node-path");
102         keys.node_kind = pool_intern("Node-kind");
103         keys.node_action = pool_intern("Node-action");
104         keys.node_copyfrom_path = pool_intern("Node-copyfrom-path");
105         keys.node_copyfrom_rev = pool_intern("Node-copyfrom-rev");
106         keys.text_content_length = pool_intern("Text-content-length");
107         keys.prop_content_length = pool_intern("Prop-content-length");
108         keys.content_length = pool_intern("Content-length");
109         keys.svn_fs_dump_format_version = pool_intern("SVN-fs-dump-format-version");
110 }
111
112 static void read_props(void)
113 {
114         uint32_t len;
115         uint32_t key = ~0;
116         char *val = NULL;
117         char *t;
118         while ((t = buffer_read_line()) && strcmp(t, "PROPS-END")) {
119                 if (!strncmp(t, "K ", 2)) {
120                         len = atoi(&t[2]);
121                         key = pool_intern(buffer_read_string(len));
122                         buffer_read_line();
123                 } else if (!strncmp(t, "V ", 2)) {
124                         len = atoi(&t[2]);
125                         val = buffer_read_string(len);
126                         if (key == keys.svn_log) {
127                                 /* Value length excludes terminating nul. */
128                                 rev_ctx.log = log_copy(len + 1, val);
129                         } else if (key == keys.svn_author) {
130                                 rev_ctx.author = pool_intern(val);
131                         } else if (key == keys.svn_date) {
132                                 if (parse_date_basic(val, &rev_ctx.timestamp, NULL))
133                                         fprintf(stderr, "Invalid timestamp: %s\n", val);
134                         } else if (key == keys.svn_executable) {
135                                 node_ctx.type = REPO_MODE_EXE;
136                         } else if (key == keys.svn_special) {
137                                 node_ctx.type = REPO_MODE_LNK;
138                         }
139                         key = ~0;
140                         buffer_read_line();
141                 }
142         }
143 }
144
145 static void handle_node(void)
146 {
147         if (node_ctx.propLength != LENGTH_UNKNOWN && node_ctx.propLength)
148                 read_props();
149
150         if (node_ctx.srcRev)
151                 node_ctx.srcMode = repo_copy(node_ctx.srcRev, node_ctx.src, node_ctx.dst);
152
153         if (node_ctx.textLength != LENGTH_UNKNOWN &&
154             node_ctx.type != REPO_MODE_DIR)
155                 node_ctx.mark = next_blob_mark();
156
157         if (node_ctx.action == NODEACT_DELETE) {
158                 repo_delete(node_ctx.dst);
159         } else if (node_ctx.action == NODEACT_CHANGE ||
160                            node_ctx.action == NODEACT_REPLACE) {
161                 if (node_ctx.action == NODEACT_REPLACE &&
162                     node_ctx.type == REPO_MODE_DIR)
163                         repo_replace(node_ctx.dst, node_ctx.mark);
164                 else if (node_ctx.propLength != LENGTH_UNKNOWN)
165                         repo_modify(node_ctx.dst, node_ctx.type, node_ctx.mark);
166                 else if (node_ctx.textLength != LENGTH_UNKNOWN)
167                         node_ctx.srcMode = repo_replace(node_ctx.dst, node_ctx.mark);
168         } else if (node_ctx.action == NODEACT_ADD) {
169                 if (node_ctx.srcRev && node_ctx.propLength != LENGTH_UNKNOWN)
170                         repo_modify(node_ctx.dst, node_ctx.type, node_ctx.mark);
171                 else if (node_ctx.srcRev && node_ctx.textLength != LENGTH_UNKNOWN)
172                         node_ctx.srcMode = repo_replace(node_ctx.dst, node_ctx.mark);
173                 else if ((node_ctx.type == REPO_MODE_DIR && !node_ctx.srcRev) ||
174                          node_ctx.textLength != LENGTH_UNKNOWN)
175                         repo_add(node_ctx.dst, node_ctx.type, node_ctx.mark);
176         }
177
178         if (node_ctx.propLength == LENGTH_UNKNOWN && node_ctx.srcMode)
179                 node_ctx.type = node_ctx.srcMode;
180
181         if (node_ctx.mark)
182                 fast_export_blob(node_ctx.type, node_ctx.mark, node_ctx.textLength);
183         else if (node_ctx.textLength != LENGTH_UNKNOWN)
184                 buffer_skip_bytes(node_ctx.textLength);
185 }
186
187 static void handle_revision(void)
188 {
189         if (rev_ctx.revision)
190                 repo_commit(rev_ctx.revision, rev_ctx.author, rev_ctx.log,
191                         dump_ctx.uuid, dump_ctx.url, rev_ctx.timestamp);
192 }
193
194 void svndump_read(const char *url)
195 {
196         char *val;
197         char *t;
198         uint32_t active_ctx = DUMP_CTX;
199         uint32_t len;
200         uint32_t key;
201
202         reset_dump_ctx(pool_intern(url));
203         while ((t = buffer_read_line())) {
204                 val = strstr(t, ": ");
205                 if (!val)
206                         continue;
207                 *val++ = '\0';
208                 *val++ = '\0';
209                 key = pool_intern(t);
210
211                 if (key == keys.svn_fs_dump_format_version) {
212                         dump_ctx.version = atoi(val);
213                         if (dump_ctx.version > 2)
214                                 die("expected svn dump format version <= 2, found %"PRIu32,
215                                     dump_ctx.version);
216                 } else if (key == keys.uuid) {
217                         dump_ctx.uuid = pool_intern(val);
218                 } else if (key == keys.revision_number) {
219                         if (active_ctx == NODE_CTX)
220                                 handle_node();
221                         if (active_ctx != DUMP_CTX)
222                                 handle_revision();
223                         active_ctx = REV_CTX;
224                         reset_rev_ctx(atoi(val));
225                 } else if (key == keys.node_path) {
226                         if (active_ctx == NODE_CTX)
227                                 handle_node();
228                         active_ctx = NODE_CTX;
229                         reset_node_ctx(val);
230                 } else if (key == keys.node_kind) {
231                         if (!strcmp(val, "dir"))
232                                 node_ctx.type = REPO_MODE_DIR;
233                         else if (!strcmp(val, "file"))
234                                 node_ctx.type = REPO_MODE_BLB;
235                         else
236                                 fprintf(stderr, "Unknown node-kind: %s\n", val);
237                 } else if (key == keys.node_action) {
238                         if (!strcmp(val, "delete")) {
239                                 node_ctx.action = NODEACT_DELETE;
240                         } else if (!strcmp(val, "add")) {
241                                 node_ctx.action = NODEACT_ADD;
242                         } else if (!strcmp(val, "change")) {
243                                 node_ctx.action = NODEACT_CHANGE;
244                         } else if (!strcmp(val, "replace")) {
245                                 node_ctx.action = NODEACT_REPLACE;
246                         } else {
247                                 fprintf(stderr, "Unknown node-action: %s\n", val);
248                                 node_ctx.action = NODEACT_UNKNOWN;
249                         }
250                 } else if (key == keys.node_copyfrom_path) {
251                         pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.src, "/", val);
252                 } else if (key == keys.node_copyfrom_rev) {
253                         node_ctx.srcRev = atoi(val);
254                 } else if (key == keys.text_content_length) {
255                         node_ctx.textLength = atoi(val);
256                 } else if (key == keys.prop_content_length) {
257                         node_ctx.propLength = atoi(val);
258                 } else if (key == keys.content_length) {
259                         len = atoi(val);
260                         buffer_read_line();
261                         if (active_ctx == REV_CTX) {
262                                 read_props();
263                         } else if (active_ctx == NODE_CTX) {
264                                 handle_node();
265                                 active_ctx = REV_CTX;
266                         } else {
267                                 fprintf(stderr, "Unexpected content length header: %"PRIu32"\n", len);
268                                 buffer_skip_bytes(len);
269                         }
270                 }
271         }
272         if (active_ctx == NODE_CTX)
273                 handle_node();
274         if (active_ctx != DUMP_CTX)
275                 handle_revision();
276 }
277
278 void svndump_init(const char *filename)
279 {
280         buffer_init(filename);
281         repo_init();
282         reset_dump_ctx(~0);
283         reset_rev_ctx(0);
284         reset_node_ctx(NULL);
285         init_keys();
286 }
287
288 void svndump_deinit(void)
289 {
290         log_reset();
291         repo_reset();
292         reset_dump_ctx(~0);
293         reset_rev_ctx(0);
294         reset_node_ctx(NULL);
295         if (buffer_deinit())
296                 fprintf(stderr, "Input error\n");
297         if (ferror(stdout))
298                 fprintf(stderr, "Output error\n");
299 }
300
301 void svndump_reset(void)
302 {
303         log_reset();
304         buffer_reset();
305         repo_reset();
306         reset_dump_ctx(~0);
307         reset_rev_ctx(0);
308         reset_node_ctx(NULL);
309 }