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git/vcs-svn/svndump.c

303 lines
8.0 KiB
C
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/*
* Parse and rearrange a svnadmin dump.
* Create the dump with:
* svnadmin dump --incremental -r<startrev>:<endrev> <repository> >outfile
*
* Licensed under a two-clause BSD-style license.
* See LICENSE for details.
*/
#include "cache.h"
#include "repo_tree.h"
#include "fast_export.h"
#include "line_buffer.h"
#include "obj_pool.h"
#include "string_pool.h"
#define NODEACT_REPLACE 4
#define NODEACT_DELETE 3
#define NODEACT_ADD 2
#define NODEACT_CHANGE 1
#define NODEACT_UNKNOWN 0
#define DUMP_CTX 0
#define REV_CTX 1
#define NODE_CTX 2
#define LENGTH_UNKNOWN (~0)
#define DATE_RFC2822_LEN 31
/* Create memory pool for log messages */
obj_pool_gen(log, char, 4096)
static char* log_copy(uint32_t length, char *log)
{
char *buffer;
log_free(log_pool.size);
buffer = log_pointer(log_alloc(length));
strncpy(buffer, log, length);
return buffer;
}
static struct {
uint32_t action, propLength, textLength, srcRev, srcMode, mark, type;
uint32_t src[REPO_MAX_PATH_DEPTH], dst[REPO_MAX_PATH_DEPTH];
} node_ctx;
static struct {
uint32_t revision, author;
unsigned long timestamp;
char *log;
} rev_ctx;
static struct {
uint32_t uuid, url;
} dump_ctx;
static struct {
uint32_t svn_log, svn_author, svn_date, svn_executable, svn_special, uuid,
revision_number, node_path, node_kind, node_action,
node_copyfrom_path, node_copyfrom_rev, text_content_length,
prop_content_length, content_length;
} keys;
static void reset_node_ctx(char *fname)
{
node_ctx.type = 0;
node_ctx.action = NODEACT_UNKNOWN;
node_ctx.propLength = LENGTH_UNKNOWN;
node_ctx.textLength = LENGTH_UNKNOWN;
node_ctx.src[0] = ~0;
node_ctx.srcRev = 0;
node_ctx.srcMode = 0;
pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.dst, "/", fname);
node_ctx.mark = 0;
}
static void reset_rev_ctx(uint32_t revision)
{
rev_ctx.revision = revision;
rev_ctx.timestamp = 0;
rev_ctx.log = NULL;
rev_ctx.author = ~0;
}
static void reset_dump_ctx(uint32_t url)
{
dump_ctx.url = url;
dump_ctx.uuid = ~0;
}
static void init_keys(void)
{
keys.svn_log = pool_intern("svn:log");
keys.svn_author = pool_intern("svn:author");
keys.svn_date = pool_intern("svn:date");
keys.svn_executable = pool_intern("svn:executable");
keys.svn_special = pool_intern("svn:special");
keys.uuid = pool_intern("UUID");
keys.revision_number = pool_intern("Revision-number");
keys.node_path = pool_intern("Node-path");
keys.node_kind = pool_intern("Node-kind");
keys.node_action = pool_intern("Node-action");
keys.node_copyfrom_path = pool_intern("Node-copyfrom-path");
keys.node_copyfrom_rev = pool_intern("Node-copyfrom-rev");
keys.text_content_length = pool_intern("Text-content-length");
keys.prop_content_length = pool_intern("Prop-content-length");
keys.content_length = pool_intern("Content-length");
}
static void read_props(void)
{
uint32_t len;
uint32_t key = ~0;
char *val = NULL;
char *t;
while ((t = buffer_read_line()) && strcmp(t, "PROPS-END")) {
if (!strncmp(t, "K ", 2)) {
len = atoi(&t[2]);
key = pool_intern(buffer_read_string(len));
buffer_read_line();
} else if (!strncmp(t, "V ", 2)) {
len = atoi(&t[2]);
val = buffer_read_string(len);
if (key == keys.svn_log) {
/* Value length excludes terminating nul. */
rev_ctx.log = log_copy(len + 1, val);
} else if (key == keys.svn_author) {
rev_ctx.author = pool_intern(val);
} else if (key == keys.svn_date) {
if (parse_date_basic(val, &rev_ctx.timestamp, NULL))
fprintf(stderr, "Invalid timestamp: %s\n", val);
} else if (key == keys.svn_executable) {
node_ctx.type = REPO_MODE_EXE;
} else if (key == keys.svn_special) {
node_ctx.type = REPO_MODE_LNK;
}
key = ~0;
buffer_read_line();
}
}
}
static void handle_node(void)
{
if (node_ctx.propLength != LENGTH_UNKNOWN && node_ctx.propLength)
read_props();
if (node_ctx.srcRev)
node_ctx.srcMode = repo_copy(node_ctx.srcRev, node_ctx.src, node_ctx.dst);
if (node_ctx.textLength != LENGTH_UNKNOWN &&
node_ctx.type != REPO_MODE_DIR)
node_ctx.mark = next_blob_mark();
if (node_ctx.action == NODEACT_DELETE) {
repo_delete(node_ctx.dst);
} else if (node_ctx.action == NODEACT_CHANGE ||
node_ctx.action == NODEACT_REPLACE) {
if (node_ctx.action == NODEACT_REPLACE &&
node_ctx.type == REPO_MODE_DIR)
repo_replace(node_ctx.dst, node_ctx.mark);
else if (node_ctx.propLength != LENGTH_UNKNOWN)
repo_modify(node_ctx.dst, node_ctx.type, node_ctx.mark);
else if (node_ctx.textLength != LENGTH_UNKNOWN)
node_ctx.srcMode = repo_replace(node_ctx.dst, node_ctx.mark);
} else if (node_ctx.action == NODEACT_ADD) {
if (node_ctx.srcRev && node_ctx.propLength != LENGTH_UNKNOWN)
repo_modify(node_ctx.dst, node_ctx.type, node_ctx.mark);
else if (node_ctx.srcRev && node_ctx.textLength != LENGTH_UNKNOWN)
node_ctx.srcMode = repo_replace(node_ctx.dst, node_ctx.mark);
else if ((node_ctx.type == REPO_MODE_DIR && !node_ctx.srcRev) ||
node_ctx.textLength != LENGTH_UNKNOWN)
repo_add(node_ctx.dst, node_ctx.type, node_ctx.mark);
}
if (node_ctx.propLength == LENGTH_UNKNOWN && node_ctx.srcMode)
node_ctx.type = node_ctx.srcMode;
if (node_ctx.mark)
fast_export_blob(node_ctx.type, node_ctx.mark, node_ctx.textLength);
else if (node_ctx.textLength != LENGTH_UNKNOWN)
buffer_skip_bytes(node_ctx.textLength);
}
static void handle_revision(void)
{
if (rev_ctx.revision)
repo_commit(rev_ctx.revision, rev_ctx.author, rev_ctx.log,
dump_ctx.uuid, dump_ctx.url, rev_ctx.timestamp);
}
void svndump_read(const char *url)
{
char *val;
char *t;
uint32_t active_ctx = DUMP_CTX;
uint32_t len;
uint32_t key;
reset_dump_ctx(pool_intern(url));
while ((t = buffer_read_line())) {
val = strstr(t, ": ");
if (!val)
continue;
*val++ = '\0';
*val++ = '\0';
key = pool_intern(t);
if (key == keys.uuid) {
dump_ctx.uuid = pool_intern(val);
} else if (key == keys.revision_number) {
if (active_ctx == NODE_CTX)
handle_node();
if (active_ctx != DUMP_CTX)
handle_revision();
active_ctx = REV_CTX;
reset_rev_ctx(atoi(val));
} else if (key == keys.node_path) {
if (active_ctx == NODE_CTX)
handle_node();
active_ctx = NODE_CTX;
reset_node_ctx(val);
} else if (key == keys.node_kind) {
if (!strcmp(val, "dir"))
node_ctx.type = REPO_MODE_DIR;
else if (!strcmp(val, "file"))
node_ctx.type = REPO_MODE_BLB;
else
fprintf(stderr, "Unknown node-kind: %s\n", val);
} else if (key == keys.node_action) {
if (!strcmp(val, "delete")) {
node_ctx.action = NODEACT_DELETE;
} else if (!strcmp(val, "add")) {
node_ctx.action = NODEACT_ADD;
} else if (!strcmp(val, "change")) {
node_ctx.action = NODEACT_CHANGE;
} else if (!strcmp(val, "replace")) {
node_ctx.action = NODEACT_REPLACE;
} else {
fprintf(stderr, "Unknown node-action: %s\n", val);
node_ctx.action = NODEACT_UNKNOWN;
}
} else if (key == keys.node_copyfrom_path) {
pool_tok_seq(REPO_MAX_PATH_DEPTH, node_ctx.src, "/", val);
} else if (key == keys.node_copyfrom_rev) {
node_ctx.srcRev = atoi(val);
} else if (key == keys.text_content_length) {
node_ctx.textLength = atoi(val);
} else if (key == keys.prop_content_length) {
node_ctx.propLength = atoi(val);
} else if (key == keys.content_length) {
len = atoi(val);
buffer_read_line();
if (active_ctx == REV_CTX) {
read_props();
} else if (active_ctx == NODE_CTX) {
handle_node();
active_ctx = REV_CTX;
} else {
fprintf(stderr, "Unexpected content length header: %"PRIu32"\n", len);
buffer_skip_bytes(len);
}
}
}
if (active_ctx == NODE_CTX)
handle_node();
if (active_ctx != DUMP_CTX)
handle_revision();
}
void svndump_init(const char *filename)
{
buffer_init(filename);
repo_init();
reset_dump_ctx(~0);
reset_rev_ctx(0);
reset_node_ctx(NULL);
init_keys();
}
void svndump_deinit(void)
{
log_reset();
repo_reset();
reset_dump_ctx(~0);
reset_rev_ctx(0);
reset_node_ctx(NULL);
if (buffer_deinit())
fprintf(stderr, "Input error\n");
if (ferror(stdout))
fprintf(stderr, "Output error\n");
}
void svndump_reset(void)
{
log_reset();
buffer_reset();
repo_reset();
reset_dump_ctx(~0);
reset_rev_ctx(0);
reset_node_ctx(NULL);
}
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