vcs-svn / svndump.con commit vcs-svn: remove spurious semicolons (0631623)
   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 struct line_buffer input = LINE_BUFFER_INIT;
  34
  35static char *log_copy(uint32_t length, const char *log)
  36{
  37        char *buffer;
  38        log_free(log_pool.size);
  39        buffer = log_pointer(log_alloc(length));
  40        strncpy(buffer, log, length);
  41        return buffer;
  42}
  43
  44static struct {
  45        uint32_t action, propLength, textLength, srcRev, type;
  46        uint32_t src[REPO_MAX_PATH_DEPTH], dst[REPO_MAX_PATH_DEPTH];
  47        uint32_t text_delta, prop_delta;
  48} node_ctx;
  49
  50static struct {
  51        uint32_t revision, author;
  52        unsigned long timestamp;
  53        char *log;
  54} rev_ctx;
  55
  56static struct {
  57        uint32_t version, uuid, url;
  58} dump_ctx;
  59
  60static struct {
  61        uint32_t svn_log, svn_author, svn_date, svn_executable, svn_special, uuid,
  62                revision_number, node_path, node_kind, node_action,
  63                node_copyfrom_path, node_copyfrom_rev, text_content_length,
  64                prop_content_length, content_length, svn_fs_dump_format_version,
  65                /* version 3 format */
  66                text_delta, prop_delta;
  67} keys;
  68
  69static void reset_node_ctx(char *fname)
  70{
  71        node_ctx.type = 0;
  72        node_ctx.action = NODEACT_UNKNOWN;
  73        node_ctx.propLength = LENGTH_UNKNOWN;
  74        node_ctx.textLength = LENGTH_UNKNOWN;
  75        node_ctx.src[0] = ~0;
  76        node_ctx.srcRev = 0;
  77        pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.dst, "/", fname);
  78        node_ctx.text_delta = 0;
  79        node_ctx.prop_delta = 0;
  80}
  81
  82static void reset_rev_ctx(uint32_t revision)
  83{
  84        rev_ctx.revision = revision;
  85        rev_ctx.timestamp = 0;
  86        rev_ctx.log = NULL;
  87        rev_ctx.author = ~0;
  88}
  89
  90static void reset_dump_ctx(uint32_t url)
  91{
  92        dump_ctx.url = url;
  93        dump_ctx.version = 1;
  94        dump_ctx.uuid = ~0;
  95}
  96
  97static void init_keys(void)
  98{
  99        keys.svn_log = pool_intern("svn:log");
 100        keys.svn_author = pool_intern("svn:author");
 101        keys.svn_date = pool_intern("svn:date");
 102        keys.svn_executable = pool_intern("svn:executable");
 103        keys.svn_special = pool_intern("svn:special");
 104        keys.uuid = pool_intern("UUID");
 105        keys.revision_number = pool_intern("Revision-number");
 106        keys.node_path = pool_intern("Node-path");
 107        keys.node_kind = pool_intern("Node-kind");
 108        keys.node_action = pool_intern("Node-action");
 109        keys.node_copyfrom_path = pool_intern("Node-copyfrom-path");
 110        keys.node_copyfrom_rev = pool_intern("Node-copyfrom-rev");
 111        keys.text_content_length = pool_intern("Text-content-length");
 112        keys.prop_content_length = pool_intern("Prop-content-length");
 113        keys.content_length = pool_intern("Content-length");
 114        keys.svn_fs_dump_format_version = pool_intern("SVN-fs-dump-format-version");
 115        /* version 3 format (Subversion 1.1.0) */
 116        keys.text_delta = pool_intern("Text-delta");
 117        keys.prop_delta = pool_intern("Prop-delta");
 118}
 119
 120static void handle_property(uint32_t key, const char *val, uint32_t len,
 121                                uint32_t *type_set)
 122{
 123        if (key == keys.svn_log) {
 124                if (!val)
 125                        die("invalid dump: unsets svn:log");
 126                /* Value length excludes terminating nul. */
 127                rev_ctx.log = log_copy(len + 1, val);
 128        } else if (key == keys.svn_author) {
 129                rev_ctx.author = pool_intern(val);
 130        } else if (key == keys.svn_date) {
 131                if (!val)
 132                        die("invalid dump: unsets svn:date");
 133                if (parse_date_basic(val, &rev_ctx.timestamp, NULL))
 134                        warning("invalid timestamp: %s", val);
 135        } else if (key == keys.svn_executable || key == keys.svn_special) {
 136                if (*type_set) {
 137                        if (!val)
 138                                return;
 139                        die("invalid dump: sets type twice");
 140                }
 141                if (!val) {
 142                        node_ctx.type = REPO_MODE_BLB;
 143                        return;
 144                }
 145                *type_set = 1;
 146                node_ctx.type = key == keys.svn_executable ?
 147                                REPO_MODE_EXE :
 148                                REPO_MODE_LNK;
 149        }
 150}
 151
 152static void read_props(void)
 153{
 154        uint32_t key = ~0;
 155        const char *t;
 156        /*
 157         * NEEDSWORK: to support simple mode changes like
 158         *      K 11
 159         *      svn:special
 160         *      V 1
 161         *      *
 162         *      D 14
 163         *      svn:executable
 164         * we keep track of whether a mode has been set and reset to
 165         * plain file only if not.  We should be keeping track of the
 166         * symlink and executable bits separately instead.
 167         */
 168        uint32_t type_set = 0;
 169        while ((t = buffer_read_line(&input)) && strcmp(t, "PROPS-END")) {
 170                uint32_t len;
 171                const char *val;
 172                const char type = t[0];
 173
 174                if (!type || t[1] != ' ')
 175                        die("invalid property line: %s\n", t);
 176                len = atoi(&t[2]);
 177                val = buffer_read_string(&input, len);
 178                buffer_skip_bytes(&input, 1);   /* Discard trailing newline. */
 179
 180                switch (type) {
 181                case 'K':
 182                        key = pool_intern(val);
 183                        continue;
 184                case 'D':
 185                        key = pool_intern(val);
 186                        val = NULL;
 187                        len = 0;
 188                        /* fall through */
 189                case 'V':
 190                        handle_property(key, val, len, &type_set);
 191                        key = ~0;
 192                        continue;
 193                default:
 194                        die("invalid property line: %s\n", t);
 195                }
 196        }
 197}
 198
 199static void handle_node(void)
 200{
 201        uint32_t mark = 0;
 202        const uint32_t type = node_ctx.type;
 203        const int have_props = node_ctx.propLength != LENGTH_UNKNOWN;
 204
 205        if (node_ctx.text_delta)
 206                die("text deltas not supported");
 207        if (node_ctx.textLength != LENGTH_UNKNOWN)
 208                mark = next_blob_mark();
 209        if (node_ctx.action == NODEACT_DELETE) {
 210                if (mark || have_props || node_ctx.srcRev)
 211                        die("invalid dump: deletion node has "
 212                                "copyfrom info, text, or properties");
 213                return repo_delete(node_ctx.dst);
 214        }
 215        if (node_ctx.action == NODEACT_REPLACE) {
 216                repo_delete(node_ctx.dst);
 217                node_ctx.action = NODEACT_ADD;
 218        }
 219        if (node_ctx.srcRev) {
 220                repo_copy(node_ctx.srcRev, node_ctx.src, node_ctx.dst);
 221                if (node_ctx.action == NODEACT_ADD)
 222                        node_ctx.action = NODEACT_CHANGE;
 223        }
 224        if (mark && type == REPO_MODE_DIR)
 225                die("invalid dump: directories cannot have text attached");
 226        if (node_ctx.action == NODEACT_CHANGE && !~*node_ctx.dst) {
 227                if (type != REPO_MODE_DIR)
 228                        die("invalid dump: root of tree is not a regular file");
 229        } else if (node_ctx.action == NODEACT_CHANGE) {
 230                uint32_t mode = repo_modify_path(node_ctx.dst, 0, mark);
 231                if (!mode)
 232                        die("invalid dump: path to be modified is missing");
 233                if (mode == REPO_MODE_DIR && type != REPO_MODE_DIR)
 234                        die("invalid dump: cannot modify a directory into a file");
 235                if (mode != REPO_MODE_DIR && type == REPO_MODE_DIR)
 236                        die("invalid dump: cannot modify a file into a directory");
 237                node_ctx.type = mode;
 238        } else if (node_ctx.action == NODEACT_ADD) {
 239                if (!mark && type != REPO_MODE_DIR)
 240                        die("invalid dump: adds node without text");
 241                repo_add(node_ctx.dst, type, mark);
 242        } else {
 243                die("invalid dump: Node-path block lacks Node-action");
 244        }
 245        if (have_props) {
 246                const uint32_t old_mode = node_ctx.type;
 247                if (!node_ctx.prop_delta)
 248                        node_ctx.type = type;
 249                if (node_ctx.propLength)
 250                        read_props();
 251                if (node_ctx.type != old_mode)
 252                        repo_modify_path(node_ctx.dst, node_ctx.type, mark);
 253        }
 254        if (mark)
 255                fast_export_blob(node_ctx.type, mark,
 256                                 node_ctx.textLength, &input);
 257}
 258
 259static void handle_revision(void)
 260{
 261        if (rev_ctx.revision)
 262                repo_commit(rev_ctx.revision, rev_ctx.author, rev_ctx.log,
 263                        dump_ctx.uuid, dump_ctx.url, rev_ctx.timestamp);
 264}
 265
 266void svndump_read(const char *url)
 267{
 268        char *val;
 269        char *t;
 270        uint32_t active_ctx = DUMP_CTX;
 271        uint32_t len;
 272        uint32_t key;
 273
 274        reset_dump_ctx(pool_intern(url));
 275        while ((t = buffer_read_line(&input))) {
 276                val = strstr(t, ": ");
 277                if (!val)
 278                        continue;
 279                *val++ = '\0';
 280                *val++ = '\0';
 281                key = pool_intern(t);
 282
 283                if (key == keys.svn_fs_dump_format_version) {
 284                        dump_ctx.version = atoi(val);
 285                        if (dump_ctx.version > 3)
 286                                die("expected svn dump format version <= 3, found %"PRIu32,
 287                                    dump_ctx.version);
 288                } else if (key == keys.uuid) {
 289                        dump_ctx.uuid = pool_intern(val);
 290                } else if (key == keys.revision_number) {
 291                        if (active_ctx == NODE_CTX)
 292                                handle_node();
 293                        if (active_ctx != DUMP_CTX)
 294                                handle_revision();
 295                        active_ctx = REV_CTX;
 296                        reset_rev_ctx(atoi(val));
 297                } else if (key == keys.node_path) {
 298                        if (active_ctx == NODE_CTX)
 299                                handle_node();
 300                        active_ctx = NODE_CTX;
 301                        reset_node_ctx(val);
 302                } else if (key == keys.node_kind) {
 303                        if (!strcmp(val, "dir"))
 304                                node_ctx.type = REPO_MODE_DIR;
 305                        else if (!strcmp(val, "file"))
 306                                node_ctx.type = REPO_MODE_BLB;
 307                        else
 308                                fprintf(stderr, "Unknown node-kind: %s\n", val);
 309                } else if (key == keys.node_action) {
 310                        if (!strcmp(val, "delete")) {
 311                                node_ctx.action = NODEACT_DELETE;
 312                        } else if (!strcmp(val, "add")) {
 313                                node_ctx.action = NODEACT_ADD;
 314                        } else if (!strcmp(val, "change")) {
 315                                node_ctx.action = NODEACT_CHANGE;
 316                        } else if (!strcmp(val, "replace")) {
 317                                node_ctx.action = NODEACT_REPLACE;
 318                        } else {
 319                                fprintf(stderr, "Unknown node-action: %s\n", val);
 320                                node_ctx.action = NODEACT_UNKNOWN;
 321                        }
 322                } else if (key == keys.node_copyfrom_path) {
 323                        pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.src, "/", val);
 324                } else if (key == keys.node_copyfrom_rev) {
 325                        node_ctx.srcRev = atoi(val);
 326                } else if (key == keys.text_content_length) {
 327                        node_ctx.textLength = atoi(val);
 328                } else if (key == keys.prop_content_length) {
 329                        node_ctx.propLength = atoi(val);
 330                } else if (key == keys.text_delta) {
 331                        node_ctx.text_delta = !strcmp(val, "true");
 332                } else if (key == keys.prop_delta) {
 333                        node_ctx.prop_delta = !strcmp(val, "true");
 334                } else if (key == keys.content_length) {
 335                        len = atoi(val);
 336                        buffer_read_line(&input);
 337                        if (active_ctx == REV_CTX) {
 338                                read_props();
 339                        } else if (active_ctx == NODE_CTX) {
 340                                handle_node();
 341                                active_ctx = REV_CTX;
 342                        } else {
 343                                fprintf(stderr, "Unexpected content length header: %"PRIu32"\n", len);
 344                                buffer_skip_bytes(&input, len);
 345                        }
 346                }
 347        }
 348        if (active_ctx == NODE_CTX)
 349                handle_node();
 350        if (active_ctx != DUMP_CTX)
 351                handle_revision();
 352}
 353
 354int svndump_init(const char *filename)
 355{
 356        if (buffer_init(&input, filename))
 357                return error("cannot open %s: %s", filename, strerror(errno));
 358        repo_init();
 359        reset_dump_ctx(~0);
 360        reset_rev_ctx(0);
 361        reset_node_ctx(NULL);
 362        init_keys();
 363        return 0;
 364}
 365
 366void svndump_deinit(void)
 367{
 368        log_reset();
 369        repo_reset();
 370        reset_dump_ctx(~0);
 371        reset_rev_ctx(0);
 372        reset_node_ctx(NULL);
 373        if (buffer_deinit(&input))
 374                fprintf(stderr, "Input error\n");
 375        if (ferror(stdout))
 376                fprintf(stderr, "Output error\n");
 377}
 378
 379void svndump_reset(void)
 380{
 381        log_reset();
 382        buffer_reset(&input);
 383        repo_reset();
 384        reset_dump_ctx(~0);
 385        reset_rev_ctx(0);
 386        reset_node_ctx(NULL);
 387}