Andrew's git - gitweb.git/blob

fa580e62de05f832e7d7474cc1a457cd7379cef2
   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, srcMode, mark, type;
  44        uint32_t src[REPO_MAX_PATH_DEPTH], dst[REPO_MAX_PATH_DEPTH];
  45} node_ctx;
  46
  47static struct {
  48        uint32_t revision, author;
  49        unsigned long timestamp;
  50        char *log;
  51} rev_ctx;
  52
  53static struct {
  54        uint32_t version, uuid, url;
  55} dump_ctx;
  56
  57static 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
  64static 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
  77static 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
  85static 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
  92static 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
 112static 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
 145static 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
 187static 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
 194void 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 %d",
 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
 278void 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
 288void 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
 301void 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}