From: David Barr <david.barr@xxxxxxxxxxxx>
repo_tree maintains the exporter's state and provides a facility to
to call fast_export, which then writes objects to stdout suitable for
consumption by git-fast-import.
Signed-off-by: David Barr <david.barr@xxxxxxxxxxxx>
Signed-off-by: Ramkumar Ramachandra <artagnon@xxxxxxxxx>
---
vcs-svn/fast_export.c | 69 ++++++++++
vcs-svn/fast_export.h | 14 ++
vcs-svn/repo_tree.c | 353 +++++++++++++++++++++++++++++++++++++++++++++++++
vcs-svn/repo_tree.h | 27 ++++
4 files changed, 463 insertions(+), 0 deletions(-)
create mode 100644 vcs-svn/fast_export.c
create mode 100644 vcs-svn/fast_export.h
create mode 100644 vcs-svn/repo_tree.c
create mode 100644 vcs-svn/repo_tree.h
diff --git a/vcs-svn/fast_export.c b/vcs-svn/fast_export.c
new file mode 100644
index 0000000..e5eb409
--- /dev/null
+++ b/vcs-svn/fast_export.c
@@ -0,0 +1,69 @@
+#include "git-compat-util.h"
+
+#include "fast_export.h"
+#include "line_buffer.h"
+#include "repo_tree.h"
+#include "string_pool.h"
+
+#define MAX_GITSVN_LINE_LEN 4096
+
+static uint32_t first_commit_done;
+
+void fast_export_delete(uint32_t depth, uint32_t *path)
+{
+ putchar('D');
+ putchar(' ');
+ pool_print_seq(depth, path, '/', stdout);
+ putchar('\n');
+}
+
+void fast_export_modify(uint32_t depth, uint32_t *path, uint32_t mode,
+ uint32_t mark)
+{
+ printf("M %06o :%d ", mode, mark);
+ pool_print_seq(depth, path, '/', stdout);
+ putchar('\n');
+}
+
+static char gitsvnline[MAX_GITSVN_LINE_LEN];
+void fast_export_commit(uint32_t revision, uint32_t author, char *log,
+ uint32_t uuid, uint32_t url,
+ unsigned long timestamp)
+{
+ if (!log)
+ log = "";
+ if (~uuid && ~url) {
+ snprintf(gitsvnline, MAX_GITSVN_LINE_LEN, "\n\ngit-svn-id: %s@%d %s\n",
+ pool_fetch(url), revision, pool_fetch(uuid));
+ } else {
+ *gitsvnline = '\0';
+ }
+ printf("commit refs/heads/master\n");
+ printf("committer %s <%s@%s> %ld +0000\n",
+ ~author ? pool_fetch(author) : "nobody",
+ ~author ? pool_fetch(author) : "nobody",
+ ~uuid ? pool_fetch(uuid) : "local", timestamp);
+ printf("data %zd\n%s%s\n",
+ strlen(log) + strlen(gitsvnline), log, gitsvnline);
+ if (!first_commit_done) {
+ if (revision > 1)
+ printf("from refs/heads/master^0\n");
+ first_commit_done = 1;
+ }
+ repo_diff(revision - 1, revision);
+ fputc('\n', stdout);
+
+ printf("progress Imported commit %d.\n\n", revision);
+}
+
+void fast_export_blob(uint32_t mode, uint32_t mark, uint32_t len)
+{
+ if (mode == REPO_MODE_LNK) {
+ /* svn symlink blobs start with "link " */
+ buffer_skip_bytes(5);
+ len -= 5;
+ }
+ printf("blob\nmark :%d\ndata %d\n", mark, len);
+ buffer_copy_bytes(len);
+ fputc('\n', stdout);
+}
diff --git a/vcs-svn/fast_export.h b/vcs-svn/fast_export.h
new file mode 100644
index 0000000..e9ea3ed
--- /dev/null
+++ b/vcs-svn/fast_export.h
@@ -0,0 +1,14 @@
+#ifndef FAST_EXPORT_H_
+#define FAST_EXPORT_H_
+
+#include <stdint.h>
+#include <time.h>
+
+void fast_export_delete(uint32_t depth, uint32_t *path);
+void fast_export_modify(uint32_t depth, uint32_t *path, uint32_t mode,
+ uint32_t mark);
+void fast_export_commit(uint32_t revision, uint32_t author, char *log,
+ uint32_t uuid, uint32_t url, unsigned long timestamp);
+void fast_export_blob(uint32_t mode, uint32_t mark, uint32_t len);
+
+#endif
diff --git a/vcs-svn/repo_tree.c b/vcs-svn/repo_tree.c
new file mode 100644
index 0000000..5dfffb8
--- /dev/null
+++ b/vcs-svn/repo_tree.c
@@ -0,0 +1,353 @@
+#include "git-compat-util.h"
+
+#include "string_pool.h"
+#include "repo_tree.h"
+#include "obj_pool.h"
+#include "fast_export.h"
+
+struct repo_dirent {
+ uint32_t name_offset;
+ uint32_t mode;
+ uint32_t content_offset;
+};
+
+struct repo_dir {
+ uint32_t size;
+ uint32_t first_offset;
+};
+
+struct repo_commit {
+ uint32_t mark;
+ uint32_t root_dir_offset;
+};
+
+/* Generate memory pools for commit, dir and dirent */
+obj_pool_gen(commit, struct repo_commit, 4096);
+obj_pool_gen(dir, struct repo_dir, 4096);
+obj_pool_gen(dirent, struct repo_dirent, 4096);
+
+static uint32_t num_dirs_saved;
+static uint32_t num_dirents_saved;
+static uint32_t active_commit;
+static uint32_t _mark;
+
+uint32_t next_blob_mark(void)
+{
+ return _mark++;
+}
+
+static struct repo_dir *repo_commit_root_dir(struct repo_commit *commit)
+{
+ return dir_pointer(commit->root_dir_offset);
+}
+
+static struct repo_dirent *repo_first_dirent(struct repo_dir *dir)
+{
+ return dirent_pointer(dir->first_offset);
+}
+
+static int repo_dirent_name_cmp(const void *a, const void *b)
+{
+ const struct repo_dirent *dirent1 = a, *dirent2 = b;
+ uint32_t a_offset = dirent1->name_offset;
+ uint32_t b_offset = dirent2->name_offset;
+ return (a_offset > b_offset) - (a_offset < b_offset);
+}
+
+static struct repo_dirent *repo_dirent_by_name(struct repo_dir *dir,
+ uint32_t name_offset)
+{
+ struct repo_dirent key;
+ if (dir == NULL || dir->size == 0)
+ return NULL;
+ key.name_offset = name_offset;
+ return bsearch(&key, repo_first_dirent(dir), dir->size,
+ sizeof(struct repo_dirent), repo_dirent_name_cmp);
+}
+
+static int repo_dirent_is_dir(struct repo_dirent *dirent)
+{
+ return dirent != NULL && dirent->mode == REPO_MODE_DIR;
+}
+
+static struct repo_dir *repo_dir_from_dirent(struct repo_dirent *dirent)
+{
+ if (!repo_dirent_is_dir(dirent))
+ return NULL;
+ return dir_pointer(dirent->content_offset);
+}
+
+static uint32_t dir_with_dirents_alloc(uint32_t size)
+{
+ uint32_t offset = dir_alloc(1);
+ dir_pointer(offset)->size = size;
+ dir_pointer(offset)->first_offset = dirent_alloc(size);
+ return offset;
+}
+
+static struct repo_dir *repo_clone_dir(struct repo_dir *orig_dir, uint32_t padding)
+{
+ uint32_t orig_o, new_o, dirent_o;
+ orig_o = dir_offset(orig_dir);
+ if (orig_o < num_dirs_saved) {
+ new_o = dir_with_dirents_alloc(orig_dir->size + padding);
+ orig_dir = dir_pointer(orig_o);
+ dirent_o = dir_pointer(new_o)->first_offset;
+ } else {
+ if (padding == 0)
+ return orig_dir;
+ new_o = orig_o;
+ dirent_o = dirent_alloc(orig_dir->size + padding);
+ }
+ memcpy(dirent_pointer(dirent_o), repo_first_dirent(orig_dir),
+ orig_dir->size * sizeof(struct repo_dirent));
+ dir_pointer(new_o)->size = orig_dir->size + padding;
+ dir_pointer(new_o)->first_offset = dirent_o;
+ return dir_pointer(new_o);
+}
+
+static struct repo_dirent *repo_read_dirent(uint32_t revision, uint32_t *path)
+{
+ uint32_t name = 0;
+ struct repo_dir *dir = NULL;
+ struct repo_dirent *dirent = NULL;
+ dir = repo_commit_root_dir(commit_pointer(revision));
+ while (~(name = *path++)) {
+ dirent = repo_dirent_by_name(dir, name);
+ if (dirent == NULL) {
+ return NULL;
+ } else if (repo_dirent_is_dir(dirent)) {
+ dir = repo_dir_from_dirent(dirent);
+ } else {
+ break;
+ }
+ }
+ return dirent;
+}
+
+static void
+repo_write_dirent(uint32_t *path, uint32_t mode, uint32_t content_offset,
+ uint32_t del)
+{
+ uint32_t name, revision, dirent_o = ~0, dir_o = ~0, parent_dir_o = ~0;
+ struct repo_dir *dir;
+ struct repo_dirent *dirent = NULL;
+ revision = active_commit;
+ dir = repo_commit_root_dir(commit_pointer(revision));
+ dir = repo_clone_dir(dir, 0);
+ commit_pointer(revision)->root_dir_offset = dir_offset(dir);
+ while (~(name = *path++)) {
+ parent_dir_o = dir_offset(dir);
+ dirent = repo_dirent_by_name(dir, name);
+ if (dirent == NULL) {
+ dir = repo_clone_dir(dir, 1);
+ dirent = &repo_first_dirent(dir)[dir->size - 1];
+ dirent->name_offset = name;
+ dirent->mode = REPO_MODE_DIR;
+ qsort(repo_first_dirent(dir), dir->size,
+ sizeof(struct repo_dirent), repo_dirent_name_cmp);
+ dirent = repo_dirent_by_name(dir, name);
+ dir_o = dir_with_dirents_alloc(0);
+ dirent->content_offset = dir_o;
+ dir = dir_pointer(dir_o);
+ } else if ((dir = repo_dir_from_dirent(dirent))) {
+ dirent_o = dirent_offset(dirent);
+ dir = repo_clone_dir(dir, 0);
+ if (dirent_o != ~0)
+ dirent_pointer(dirent_o)->content_offset = dir_offset(dir);
+ } else {
+ dirent->mode = REPO_MODE_DIR;
+ dirent_o = dirent_offset(dirent);
+ dir_o = dir_with_dirents_alloc(0);
+ dirent = dirent_pointer(dirent_o);
+ dir = dir_pointer(dir_o);
+ dirent->content_offset = dir_o;
+ }
+ }
+ if (dirent) {
+ dirent->mode = mode;
+ dirent->content_offset = content_offset;
+ if (del && ~parent_dir_o) {
+ dirent->name_offset = ~0;
+ dir = dir_pointer(parent_dir_o);
+ qsort(repo_first_dirent(dir), dir->size,
+ sizeof(struct repo_dirent), repo_dirent_name_cmp);
+ dir->size--;
+ }
+ }
+}
+
+uint32_t repo_copy(uint32_t revision, uint32_t *src, uint32_t *dst)
+{
+ uint32_t mode = 0, content_offset = 0;
+ struct repo_dirent *src_dirent;
+ src_dirent = repo_read_dirent(revision, src);
+ if (src_dirent != NULL) {
+ mode = src_dirent->mode;
+ content_offset = src_dirent->content_offset;
+ repo_write_dirent(dst, mode, content_offset, 0);
+ }
+ return mode;
+}
+
+void repo_add(uint32_t *path, uint32_t mode, uint32_t blob_mark)
+{
+ repo_write_dirent(path, mode, blob_mark, 0);
+}
+
+uint32_t repo_replace(uint32_t *path, uint32_t blob_mark)
+{
+ uint32_t mode = 0;
+ struct repo_dirent *src_dirent;
+ src_dirent = repo_read_dirent(active_commit, path);
+ if (src_dirent != NULL) {
+ mode = src_dirent->mode;
+ repo_write_dirent(path, mode, blob_mark, 0);
+ }
+ return mode;
+}
+
+void repo_modify(uint32_t *path, uint32_t mode, uint32_t blob_mark)
+{
+ struct repo_dirent *src_dirent;
+ src_dirent = repo_read_dirent(active_commit, path);
+ if (src_dirent != NULL && blob_mark == 0) {
+ blob_mark = src_dirent->content_offset;
+ }
+ repo_write_dirent(path, mode, blob_mark, 0);
+}
+
+void repo_delete(uint32_t *path)
+{
+ repo_write_dirent(path, 0, 0, 1);
+}
+
+static void repo_git_add_r(uint32_t depth, uint32_t *path, struct repo_dir *dir);
+
+static void repo_git_add(uint32_t depth, uint32_t *path, struct repo_dirent *dirent)
+{
+ if (repo_dirent_is_dir(dirent)) {
+ repo_git_add_r(depth, path, repo_dir_from_dirent(dirent));
+ } else {
+ fast_export_modify(depth, path, dirent->mode, dirent->content_offset);
+ }
+}
+
+static void repo_git_add_r(uint32_t depth, uint32_t *path, struct repo_dir *dir)
+{
+ uint32_t o;
+ struct repo_dirent *de;
+ de = repo_first_dirent(dir);
+ for (o = 0; o < dir->size; o++) {
+ path[depth] = de[o].name_offset;
+ repo_git_add(depth + 1, path, &de[o]);
+ }
+}
+
+static void repo_diff_r(uint32_t depth, uint32_t *path, struct repo_dir *dir1,
+ struct repo_dir *dir2)
+{
+ struct repo_dirent *de1, *de2, *max_de1, *max_de2;
+ de1 = repo_first_dirent(dir1);
+ de2 = repo_first_dirent(dir2);
+ max_de1 = &de1[dir1->size];
+ max_de2 = &de2[dir2->size];
+
+ while (de1 < max_de1 && de2 < max_de2) {
+ if (de1->name_offset < de2->name_offset) {
+ path[depth] = (de1++)->name_offset;
+ fast_export_delete(depth + 1, path);
+ } else if (de1->name_offset > de2->name_offset) {
+ path[depth] = de2->name_offset;
+ repo_git_add(depth + 1, path, de2++);
+ } else {
+ path[depth] = de1->name_offset;
+ if (de1->mode != de2->mode ||
+ de1->content_offset != de2->content_offset) {
+ if (repo_dirent_is_dir(de1) && repo_dirent_is_dir(de2)) {
+ repo_diff_r(depth + 1, path,
+ repo_dir_from_dirent(de1),
+ repo_dir_from_dirent(de2));
+ } else {
+ if (repo_dirent_is_dir(de1) != repo_dirent_is_dir(de2)) {
+ fast_export_delete(depth + 1, path);
+ }
+ repo_git_add(depth + 1, path, de2);
+ }
+ }
+ de1++;
+ de2++;
+ }
+ }
+ while (de1 < max_de1) {
+ path[depth] = (de1++)->name_offset;
+ fast_export_delete(depth + 1, path);
+ }
+ while (de2 < max_de2) {
+ path[depth] = de2->name_offset;
+ repo_git_add(depth + 1, path, de2++);
+ }
+}
+
+static uint32_t path_stack[REPO_MAX_PATH_DEPTH];
+
+void repo_diff(uint32_t r1, uint32_t r2)
+{
+ repo_diff_r(0,
+ path_stack,
+ repo_commit_root_dir(commit_pointer(r1)),
+ repo_commit_root_dir(commit_pointer(r2)));
+}
+
+void repo_commit(uint32_t revision, uint32_t author, char *log, uint32_t uuid,
+ uint32_t url, unsigned long timestamp)
+{
+ fast_export_commit(revision, author, log, uuid, url, timestamp);
+ num_dirs_saved = dir_pool.size;
+ num_dirents_saved = dirent_pool.size;
+ active_commit = commit_alloc(1);
+ commit_pointer(active_commit)->root_dir_offset =
+ commit_pointer(active_commit - 1)->root_dir_offset;
+}
+
+static void mark_init(void)
+{
+ uint32_t i;
+ _mark = 0;
+ for (i = 0; i < dirent_pool.size; i++)
+ if (!repo_dirent_is_dir(dirent_pointer(i)) &&
+ dirent_pointer(i)->content_offset > _mark)
+ _mark = dirent_pointer(i)->content_offset;
+ _mark++;
+}
+
+void repo_init() {
+ pool_init();
+ commit_init();
+ dir_init();
+ dirent_init();
+ mark_init();
+ num_dirs_saved = dir_pool.size;
+ num_dirents_saved = dirent_pool.size;
+ active_commit = commit_pool.size - 1;
+ if (active_commit == -1) {
+ commit_alloc(2);
+ /* Create empty tree for commit 0. */
+ commit_pointer(0)->root_dir_offset =
+ dir_with_dirents_alloc(0);
+ /* Preallocate commit 1, ready for changes. */
+ commit_pointer(1)->root_dir_offset =
+ commit_pointer(0)->root_dir_offset;
+ active_commit = 1;
+ num_dirs_saved = dir_pool.size;
+ num_dirents_saved = dirent_pool.size;
+ }
+}
+
+void repo_reset(void)
+{
+ pool_reset();
+ commit_reset();
+ dir_reset();
+ dirent_reset();
+}
diff --git a/vcs-svn/repo_tree.h b/vcs-svn/repo_tree.h
new file mode 100644
index 0000000..c49b65a
--- /dev/null
+++ b/vcs-svn/repo_tree.h
@@ -0,0 +1,27 @@
+#ifndef REPO_TREE_H_
+#define REPO_TREE_H_
+
+#include <stdint.h>
+#include <time.h>
+
+#define REPO_MODE_DIR 0040000
+#define REPO_MODE_BLB 0100644
+#define REPO_MODE_EXE 0100755
+#define REPO_MODE_LNK 0120000
+
+#define REPO_MAX_PATH_LEN 4096
+#define REPO_MAX_PATH_DEPTH 1000
+
+uint32_t next_blob_mark(void);
+uint32_t repo_copy(uint32_t revision, uint32_t *src, uint32_t *dst);
+void repo_add(uint32_t *path, uint32_t mode, uint32_t blob_mark);
+uint32_t repo_replace(uint32_t *path, uint32_t blob_mark);
+void repo_modify(uint32_t *path, uint32_t mode, uint32_t blob_mark);
+void repo_delete(uint32_t *path);
+void repo_commit(uint32_t revision, uint32_t author, char *log, uint32_t uuid,
+ uint32_t url, long unsigned timestamp);
+void repo_diff(uint32_t r1, uint32_t r2);
+void repo_init(void);
+void repo_reset(void);
+
+#endif
--
1.7.1
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