Andrew's git / gitweb.git / vcs-svn/svndump.c
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vcs-svn / svndump.con commit vcs-svn: Combine repo_replace and repo_modify functions (08c39b5)
   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 */
  31obj_pool_gen(log, char, 4096)
  32
  33static 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
  42static 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;
  47
  48static struct {
  49        uint32_t revision, author;
  50        unsigned long timestamp;
  51        char *log;
  52} rev_ctx;
  53
  54static struct {
  55        uint32_t version, uuid, url;
  56} dump_ctx;
  57
  58static 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;
  66
  67static 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}
  79
  80static 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}
  87
  88static void reset_dump_ctx(uint32_t url)
  89{
  90        dump_ctx.url = url;
  91        dump_ctx.version = 1;
  92        dump_ctx.uuid = ~0;
  93}
  94
  95static 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}
 117
 118static void read_props(void)
 119{
 120        uint32_t len;
 121        uint32_t key = ~0;
 122        char *val = NULL;
 123        char *t;
 124        while ((t = buffer_read_line()) && strcmp(t, "PROPS-END")) {
 125                if (!strncmp(t, "K ", 2)) {
 126                        len = atoi(&t[2]);
 127                        key = pool_intern(buffer_read_string(len));
 128                        buffer_read_line();
 129                } else if (!strncmp(t, "V ", 2)) {
 130                        len = atoi(&t[2]);
 131                        val = buffer_read_string(len);
 132                        if (key == keys.svn_log) {
 133                                /* Value length excludes terminating nul. */
 134                                rev_ctx.log = log_copy(len + 1, val);
 135                        } else if (key == keys.svn_author) {
 136                                rev_ctx.author = pool_intern(val);
 137                        } else if (key == keys.svn_date) {
 138                                if (parse_date_basic(val, &rev_ctx.timestamp, NULL))
 139                                        fprintf(stderr, "Invalid timestamp: %s\n", val);
 140                        } else if (key == keys.svn_executable) {
 141                                node_ctx.type = REPO_MODE_EXE;
 142                        } else if (key == keys.svn_special) {
 143                                node_ctx.type = REPO_MODE_LNK;
 144                        }
 145                        key = ~0;
 146                        buffer_read_line();
 147                }
 148        }
 149}
 150
 151static void handle_node(void)
 152{
 153        uint32_t old_mode = 0, mark = 0;
 154        const int have_props = node_ctx.propLength != LENGTH_UNKNOWN;
 155
 156        if (node_ctx.text_delta || node_ctx.prop_delta)
 157                die("text and property deltas not supported");
 158
 159        if (node_ctx.textLength != LENGTH_UNKNOWN)
 160                mark = next_blob_mark();
 161
 162        if (node_ctx.action == NODEACT_DELETE) {
 163                if (mark || have_props || node_ctx.srcRev)
 164                        die("invalid dump: deletion node has "
 165                                "copyfrom info, text, or properties");
 166                return repo_delete(node_ctx.dst);
 167        }
 168
 169        if (node_ctx.action == NODEACT_REPLACE) {
 170                repo_delete(node_ctx.dst);
 171                node_ctx.action = NODEACT_ADD;
 172        }
 173
 174        if (have_props && node_ctx.propLength)
 175                read_props();
 176
 177        if (node_ctx.srcRev)
 178                old_mode = repo_copy(node_ctx.srcRev, node_ctx.src, node_ctx.dst);
 179
 180        if (mark && node_ctx.type == REPO_MODE_DIR)
 181                die("invalid dump: directories cannot have text attached");
 182
 183        if (node_ctx.action == NODEACT_CHANGE) {
 184                if (have_props)
 185                        repo_modify_path(node_ctx.dst, node_ctx.type, mark);
 186                else if (mark)
 187                        old_mode = repo_modify_path(node_ctx.dst, 0, mark);
 188        } else if (node_ctx.action == NODEACT_ADD) {
 189                if (node_ctx.srcRev && have_props)
 190                        repo_modify_path(node_ctx.dst, node_ctx.type, mark);
 191                else if (node_ctx.srcRev && mark)
 192                        old_mode = repo_modify_path(node_ctx.dst, 0, mark);
 193                else if ((node_ctx.type == REPO_MODE_DIR && !node_ctx.srcRev) ||
 194                         mark)
 195                        repo_add(node_ctx.dst, node_ctx.type, mark);
 196        }
 197
 198        if (!have_props && old_mode)
 199                node_ctx.type = old_mode;
 200
 201        if (mark)
 202                fast_export_blob(node_ctx.type, mark, node_ctx.textLength);
 203}
 204
 205static void handle_revision(void)
 206{
 207        if (rev_ctx.revision)
 208                repo_commit(rev_ctx.revision, rev_ctx.author, rev_ctx.log,
 209                        dump_ctx.uuid, dump_ctx.url, rev_ctx.timestamp);
 210}
 211
 212void svndump_read(const char *url)
 213{
 214        char *val;
 215        char *t;
 216        uint32_t active_ctx = DUMP_CTX;
 217        uint32_t len;
 218        uint32_t key;
 219
 220        reset_dump_ctx(pool_intern(url));
 221        while ((t = buffer_read_line())) {
 222                val = strstr(t, ": ");
 223                if (!val)
 224                        continue;
 225                *val++ = '\0';
 226                *val++ = '\0';
 227                key = pool_intern(t);
 228
 229                if (key == keys.svn_fs_dump_format_version) {
 230                        dump_ctx.version = atoi(val);
 231                        if (dump_ctx.version > 3)
 232                                die("expected svn dump format version <= 3, found %d",
 233                                    dump_ctx.version);
 234                } else if (key == keys.uuid) {
 235                        dump_ctx.uuid = pool_intern(val);
 236                } else if (key == keys.revision_number) {
 237                        if (active_ctx == NODE_CTX)
 238                                handle_node();
 239                        if (active_ctx != DUMP_CTX)
 240                                handle_revision();
 241                        active_ctx = REV_CTX;
 242                        reset_rev_ctx(atoi(val));
 243                } else if (key == keys.node_path) {
 244                        if (active_ctx == NODE_CTX)
 245                                handle_node();
 246                        active_ctx = NODE_CTX;
 247                        reset_node_ctx(val);
 248                } else if (key == keys.node_kind) {
 249                        if (!strcmp(val, "dir"))
 250                                node_ctx.type = REPO_MODE_DIR;
 251                        else if (!strcmp(val, "file"))
 252                                node_ctx.type = REPO_MODE_BLB;
 253                        else
 254                                fprintf(stderr, "Unknown node-kind: %s\n", val);
 255                } else if (key == keys.node_action) {
 256                        if (!strcmp(val, "delete")) {
 257                                node_ctx.action = NODEACT_DELETE;
 258                        } else if (!strcmp(val, "add")) {
 259                                node_ctx.action = NODEACT_ADD;
 260                        } else if (!strcmp(val, "change")) {
 261                                node_ctx.action = NODEACT_CHANGE;
 262                        } else if (!strcmp(val, "replace")) {
 263                                node_ctx.action = NODEACT_REPLACE;
 264                        } else {
 265                                fprintf(stderr, "Unknown node-action: %s\n", val);
 266                                node_ctx.action = NODEACT_UNKNOWN;
 267                        }
 268                } else if (key == keys.node_copyfrom_path) {
 269                        pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.src, "/", val);
 270                } else if (key == keys.node_copyfrom_rev) {
 271                        node_ctx.srcRev = atoi(val);
 272                } else if (key == keys.text_content_length) {
 273                        node_ctx.textLength = atoi(val);
 274                } else if (key == keys.prop_content_length) {
 275                        node_ctx.propLength = atoi(val);
 276                } else if (key == keys.text_delta) {
 277                        node_ctx.text_delta = !strcmp(val, "true");
 278                } else if (key == keys.prop_delta) {
 279                        node_ctx.prop_delta = !strcmp(val, "true");
 280                } else if (key == keys.content_length) {
 281                        len = atoi(val);
 282                        buffer_read_line();
 283                        if (active_ctx == REV_CTX) {
 284                                read_props();
 285                        } else if (active_ctx == NODE_CTX) {
 286                                handle_node();
 287                                active_ctx = REV_CTX;
 288                        } else {
 289                                fprintf(stderr, "Unexpected content length header: %"PRIu32"\n", len);
 290                                buffer_skip_bytes(len);
 291                        }
 292                }
 293        }
 294        if (active_ctx == NODE_CTX)
 295                handle_node();
 296        if (active_ctx != DUMP_CTX)
 297                handle_revision();
 298}
 299
 300int svndump_init(const char *filename)
 301{
 302        if (buffer_init(filename))
 303                return error("cannot open %s: %s", filename, strerror(errno));
 304        repo_init();
 305        reset_dump_ctx(~0);
 306        reset_rev_ctx(0);
 307        reset_node_ctx(NULL);
 308        init_keys();
 309        return 0;
 310}
 311
 312void svndump_deinit(void)
 313{
 314        log_reset();
 315        repo_reset();
 316        reset_dump_ctx(~0);
 317        reset_rev_ctx(0);
 318        reset_node_ctx(NULL);
 319        if (buffer_deinit())
 320                fprintf(stderr, "Input error\n");
 321        if (ferror(stdout))
 322                fprintf(stderr, "Output error\n");
 323}
 324
 325void svndump_reset(void)
 326{
 327        log_reset();
 328        buffer_reset();
 329        repo_reset();
 330        reset_dump_ctx(~0);
 331        reset_rev_ctx(0);
 332        reset_node_ctx(NULL);
 333}