Merge branch 'jl/fetch-submodule-recursive'
[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 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;
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.uuid = ~0;
89 }
90
91 static void init_keys(void)
92 {
93         keys.svn_log = pool_intern("svn:log");
94         keys.svn_author = pool_intern("svn:author");
95         keys.svn_date = pool_intern("svn:date");
96         keys.svn_executable = pool_intern("svn:executable");
97         keys.svn_special = pool_intern("svn:special");
98         keys.uuid = pool_intern("UUID");
99         keys.revision_number = pool_intern("Revision-number");
100         keys.node_path = pool_intern("Node-path");
101         keys.node_kind = pool_intern("Node-kind");
102         keys.node_action = pool_intern("Node-action");
103         keys.node_copyfrom_path = pool_intern("Node-copyfrom-path");
104         keys.node_copyfrom_rev = pool_intern("Node-copyfrom-rev");
105         keys.text_content_length = pool_intern("Text-content-length");
106         keys.prop_content_length = pool_intern("Prop-content-length");
107         keys.content_length = pool_intern("Content-length");
108 }
109
110 static void read_props(void)
111 {
112         uint32_t len;
113         uint32_t key = ~0;
114         char *val = NULL;
115         char *t;
116         while ((t = buffer_read_line()) && strcmp(t, "PROPS-END")) {
117                 if (!strncmp(t, "K ", 2)) {
118                         len = atoi(&t[2]);
119                         key = pool_intern(buffer_read_string(len));
120                         buffer_read_line();
121                 } else if (!strncmp(t, "V ", 2)) {
122                         len = atoi(&t[2]);
123                         val = buffer_read_string(len);
124                         if (key == keys.svn_log) {
125                                 /* Value length excludes terminating nul. */
126                                 rev_ctx.log = log_copy(len + 1, val);
127                         } else if (key == keys.svn_author) {
128                                 rev_ctx.author = pool_intern(val);
129                         } else if (key == keys.svn_date) {
130                                 if (parse_date_basic(val, &rev_ctx.timestamp, NULL))
131                                         fprintf(stderr, "Invalid timestamp: %s\n", val);
132                         } else if (key == keys.svn_executable) {
133                                 node_ctx.type = REPO_MODE_EXE;
134                         } else if (key == keys.svn_special) {
135                                 node_ctx.type = REPO_MODE_LNK;
136                         }
137                         key = ~0;
138                         buffer_read_line();
139                 }
140         }
141 }
142
143 static void handle_node(void)
144 {
145         if (node_ctx.propLength != LENGTH_UNKNOWN && node_ctx.propLength)
146                 read_props();
147
148         if (node_ctx.srcRev)
149                 node_ctx.srcMode = repo_copy(node_ctx.srcRev, node_ctx.src, node_ctx.dst);
150
151         if (node_ctx.textLength != LENGTH_UNKNOWN &&
152             node_ctx.type != REPO_MODE_DIR)
153                 node_ctx.mark = next_blob_mark();
154
155         if (node_ctx.action == NODEACT_DELETE) {
156                 repo_delete(node_ctx.dst);
157         } else if (node_ctx.action == NODEACT_CHANGE ||
158                            node_ctx.action == NODEACT_REPLACE) {
159                 if (node_ctx.action == NODEACT_REPLACE &&
160                     node_ctx.type == REPO_MODE_DIR)
161                         repo_replace(node_ctx.dst, node_ctx.mark);
162                 else if (node_ctx.propLength != LENGTH_UNKNOWN)
163                         repo_modify(node_ctx.dst, node_ctx.type, node_ctx.mark);
164                 else if (node_ctx.textLength != LENGTH_UNKNOWN)
165                         node_ctx.srcMode = repo_replace(node_ctx.dst, node_ctx.mark);
166         } else if (node_ctx.action == NODEACT_ADD) {
167                 if (node_ctx.srcRev && node_ctx.propLength != LENGTH_UNKNOWN)
168                         repo_modify(node_ctx.dst, node_ctx.type, node_ctx.mark);
169                 else if (node_ctx.srcRev && node_ctx.textLength != LENGTH_UNKNOWN)
170                         node_ctx.srcMode = repo_replace(node_ctx.dst, node_ctx.mark);
171                 else if ((node_ctx.type == REPO_MODE_DIR && !node_ctx.srcRev) ||
172                          node_ctx.textLength != LENGTH_UNKNOWN)
173                         repo_add(node_ctx.dst, node_ctx.type, node_ctx.mark);
174         }
175
176         if (node_ctx.propLength == LENGTH_UNKNOWN && node_ctx.srcMode)
177                 node_ctx.type = node_ctx.srcMode;
178
179         if (node_ctx.mark)
180                 fast_export_blob(node_ctx.type, node_ctx.mark, node_ctx.textLength);
181         else if (node_ctx.textLength != LENGTH_UNKNOWN)
182                 buffer_skip_bytes(node_ctx.textLength);
183 }
184
185 static void handle_revision(void)
186 {
187         if (rev_ctx.revision)
188                 repo_commit(rev_ctx.revision, rev_ctx.author, rev_ctx.log,
189                         dump_ctx.uuid, dump_ctx.url, rev_ctx.timestamp);
190 }
191
192 void svndump_read(const char *url)
193 {
194         char *val;
195         char *t;
196         uint32_t active_ctx = DUMP_CTX;
197         uint32_t len;
198         uint32_t key;
199
200         reset_dump_ctx(pool_intern(url));
201         while ((t = buffer_read_line())) {
202                 val = strstr(t, ": ");
203                 if (!val)
204                         continue;
205                 *val++ = '\0';
206                 *val++ = '\0';
207                 key = pool_intern(t);
208
209                 if (key == keys.uuid) {
210                         dump_ctx.uuid = pool_intern(val);
211                 } else if (key == keys.revision_number) {
212                         if (active_ctx == NODE_CTX)
213                                 handle_node();
214                         if (active_ctx != DUMP_CTX)
215                                 handle_revision();
216                         active_ctx = REV_CTX;
217                         reset_rev_ctx(atoi(val));
218                 } else if (key == keys.node_path) {
219                         if (active_ctx == NODE_CTX)
220                                 handle_node();
221                         active_ctx = NODE_CTX;
222                         reset_node_ctx(val);
223                 } else if (key == keys.node_kind) {
224                         if (!strcmp(val, "dir"))
225                                 node_ctx.type = REPO_MODE_DIR;
226                         else if (!strcmp(val, "file"))
227                                 node_ctx.type = REPO_MODE_BLB;
228                         else
229                                 fprintf(stderr, "Unknown node-kind: %s\n", val);
230                 } else if (key == keys.node_action) {
231                         if (!strcmp(val, "delete")) {
232                                 node_ctx.action = NODEACT_DELETE;
233                         } else if (!strcmp(val, "add")) {
234                                 node_ctx.action = NODEACT_ADD;
235                         } else if (!strcmp(val, "change")) {
236                                 node_ctx.action = NODEACT_CHANGE;
237                         } else if (!strcmp(val, "replace")) {
238                                 node_ctx.action = NODEACT_REPLACE;
239                         } else {
240                                 fprintf(stderr, "Unknown node-action: %s\n", val);
241                                 node_ctx.action = NODEACT_UNKNOWN;
242                         }
243                 } else if (key == keys.node_copyfrom_path) {
244                         pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.src, "/", val);
245                 } else if (key == keys.node_copyfrom_rev) {
246                         node_ctx.srcRev = atoi(val);
247                 } else if (key == keys.text_content_length) {
248                         node_ctx.textLength = atoi(val);
249                 } else if (key == keys.prop_content_length) {
250                         node_ctx.propLength = atoi(val);
251                 } else if (key == keys.content_length) {
252                         len = atoi(val);
253                         buffer_read_line();
254                         if (active_ctx == REV_CTX) {
255                                 read_props();
256                         } else if (active_ctx == NODE_CTX) {
257                                 handle_node();
258                                 active_ctx = REV_CTX;
259                         } else {
260                                 fprintf(stderr, "Unexpected content length header: %"PRIu32"\n", len);
261                                 buffer_skip_bytes(len);
262                         }
263                 }
264         }
265         if (active_ctx == NODE_CTX)
266                 handle_node();
267         if (active_ctx != DUMP_CTX)
268                 handle_revision();
269 }
270
271 void svndump_init(const char *filename)
272 {
273         buffer_init(filename);
274         repo_init();
275         reset_dump_ctx(~0);
276         reset_rev_ctx(0);
277         reset_node_ctx(NULL);
278         init_keys();
279 }
280
281 void svndump_deinit(void)
282 {
283         log_reset();
284         repo_reset();
285         reset_dump_ctx(~0);
286         reset_rev_ctx(0);
287         reset_node_ctx(NULL);
288         if (buffer_deinit())
289                 fprintf(stderr, "Input error\n");
290         if (ferror(stdout))
291                 fprintf(stderr, "Output error\n");
292 }
293
294 void svndump_reset(void)
295 {
296         log_reset();
297         buffer_reset();
298         repo_reset();
299         reset_dump_ctx(~0);
300         reset_rev_ctx(0);
301         reset_node_ctx(NULL);
302 }