svndump parses data that is in SVN dumpfile format produced by
`svnadmin dump` with the help of line_buffer, and uses repo_tree and
fast_export to emit a git fast-import stream.
Signed-off-by: David Barr <david.barr@xxxxxxxxxxxx>
Signed-off-by: Ramkumar Ramachandra <artagnon@xxxxxxxxx>
---
vcs-svn/svndump.c | 294 +++++++++++++++++++++++++++++++++++++++++++++++++++++
vcs-svn/svndump.h | 7 ++
2 files changed, 301 insertions(+), 0 deletions(-)
create mode 100644 vcs-svn/svndump.c
create mode 100644 vcs-svn/svndump.h
diff --git a/vcs-svn/svndump.c b/vcs-svn/svndump.c
new file mode 100644
index 0000000..9ee1246
--- /dev/null
+++ b/vcs-svn/svndump.c
@@ -0,0 +1,294 @@
+/*
+ * Parse and rearrange a svnadmin dump.
+ * Create the dump with:
+ * svnadmin dump --incremental -r<startrev>:<endrev> <repository> >outfile
+ */
+
+#include "cache.h"
+#include "git-compat-util.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 = "";
+ 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 buffer[27];
+ 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(val, buffer, sizeof(buffer)) > 0)
+ rev_ctx.timestamp = strtoul(buffer, NULL, 0);
+ else
+ fprintf(stderr, "Invalid timestamp: %s", 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 &&
+ 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(uint32_t url)
+{
+ char *val;
+ char *t;
+ uint32_t active_ctx = DUMP_CTX;
+ uint32_t len;
+ uint32_t key;
+
+ reset_dump_ctx(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: %d\n", len);
+ buffer_skip_bytes(len);
+ }
+ }
+ }
+ if (active_ctx == NODE_CTX) handle_node();
+ if (active_ctx != DUMP_CTX) handle_revision();
+}
+
+static void svndump_init(void)
+{
+ log_init();
+ repo_init();
+ reset_dump_ctx(~0);
+ reset_rev_ctx(0);
+ reset_node_ctx(NULL);
+ init_keys();
+}
+
+void svndump_reset(void)
+{
+ log_reset();
+ buffer_reset();
+ repo_reset();
+ reset_dump_ctx(~0);
+ reset_rev_ctx(0);
+ reset_node_ctx(NULL);
+}
diff --git a/vcs-svn/svndump.h b/vcs-svn/svndump.h
new file mode 100644
index 0000000..e205f1f
--- /dev/null
+++ b/vcs-svn/svndump.h
@@ -0,0 +1,7 @@
+#ifndef SVNDUMP_H_
+#define SVNDUMP_H_
+
+void svndump_read(char *url);
+void svndump_reset(void);
+
+#endif
--
1.7.1
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