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-rw-r--r--tar-tree.c413
1 files changed, 0 insertions, 413 deletions
diff --git a/tar-tree.c b/tar-tree.c
deleted file mode 100644
index e478e13e28..0000000000
--- a/tar-tree.c
+++ /dev/null
@@ -1,413 +0,0 @@
-/*
- * Copyright (c) 2005 Rene Scharfe
- */
-#include <time.h>
-#include "cache.h"
-#include "diff.h"
-#include "commit.h"
-
-#define RECORDSIZE (512)
-#define BLOCKSIZE (RECORDSIZE * 20)
-
-#define TYPEFLAG_AUTO '\0'
-#define TYPEFLAG_REG '0'
-#define TYPEFLAG_LNK '2'
-#define TYPEFLAG_DIR '5'
-#define TYPEFLAG_GLOBAL_HEADER 'g'
-#define TYPEFLAG_EXT_HEADER 'x'
-
-#define EXT_HEADER_PATH 1
-#define EXT_HEADER_LINKPATH 2
-
-static const char tar_tree_usage[] = "git-tar-tree <key> [basedir]";
-
-static char block[BLOCKSIZE];
-static unsigned long offset;
-
-static const char *basedir;
-static time_t archive_time;
-
-struct path_prefix {
- struct path_prefix *prev;
- const char *name;
-};
-
-/* tries hard to write, either succeeds or dies in the attempt */
-static void reliable_write(void *buf, unsigned long size)
-{
- while (size > 0) {
- long ret = xwrite(1, buf, size);
- if (ret < 0) {
- if (errno == EPIPE)
- exit(0);
- die("git-tar-tree: %s", strerror(errno));
- } else if (!ret) {
- die("git-tar-tree: disk full?");
- }
- size -= ret;
- buf += ret;
- }
-}
-
-/* writes out the whole block, but only if it is full */
-static void write_if_needed(void)
-{
- if (offset == BLOCKSIZE) {
- reliable_write(block, BLOCKSIZE);
- offset = 0;
- }
-}
-
-/* acquire the next record from the buffer; user must call write_if_needed() */
-static char *get_record(void)
-{
- char *p = block + offset;
- memset(p, 0, RECORDSIZE);
- offset += RECORDSIZE;
- return p;
-}
-
-/*
- * The end of tar archives is marked by 1024 nul bytes and after that
- * follows the rest of the block (if any).
- */
-static void write_trailer(void)
-{
- get_record();
- write_if_needed();
- get_record();
- write_if_needed();
- while (offset) {
- get_record();
- write_if_needed();
- }
-}
-
-/*
- * queues up writes, so that all our write(2) calls write exactly one
- * full block; pads writes to RECORDSIZE
- */
-static void write_blocked(void *buf, unsigned long size)
-{
- unsigned long tail;
-
- if (offset) {
- unsigned long chunk = BLOCKSIZE - offset;
- if (size < chunk)
- chunk = size;
- memcpy(block + offset, buf, chunk);
- size -= chunk;
- offset += chunk;
- buf += chunk;
- write_if_needed();
- }
- while (size >= BLOCKSIZE) {
- reliable_write(buf, BLOCKSIZE);
- size -= BLOCKSIZE;
- buf += BLOCKSIZE;
- }
- if (size) {
- memcpy(block + offset, buf, size);
- buf += size;
- offset += size;
- }
- tail = offset % RECORDSIZE;
- if (tail) {
- memset(block + offset, 0, RECORDSIZE - tail);
- offset += RECORDSIZE - tail;
- }
- write_if_needed();
-}
-
-static void append_string(char **p, const char *s)
-{
- unsigned int len = strlen(s);
- memcpy(*p, s, len);
- *p += len;
-}
-
-static void append_char(char **p, char c)
-{
- **p = c;
- *p += 1;
-}
-
-static void append_path_prefix(char **buffer, struct path_prefix *prefix)
-{
- if (!prefix)
- return;
- append_path_prefix(buffer, prefix->prev);
- append_string(buffer, prefix->name);
- append_char(buffer, '/');
-}
-
-static unsigned int path_prefix_len(struct path_prefix *prefix)
-{
- if (!prefix)
- return 0;
- return path_prefix_len(prefix->prev) + strlen(prefix->name) + 1;
-}
-
-static void append_path(char **p, int is_dir, const char *basepath,
- struct path_prefix *prefix, const char *path)
-{
- if (basepath) {
- append_string(p, basepath);
- append_char(p, '/');
- }
- append_path_prefix(p, prefix);
- append_string(p, path);
- if (is_dir)
- append_char(p, '/');
-}
-
-static unsigned int path_len(int is_dir, const char *basepath,
- struct path_prefix *prefix, const char *path)
-{
- unsigned int len = 0;
- if (basepath)
- len += strlen(basepath) + 1;
- len += path_prefix_len(prefix) + strlen(path);
- if (is_dir)
- len++;
- return len;
-}
-
-static void append_extended_header_prefix(char **p, unsigned int size,
- const char *keyword)
-{
- int len = sprintf(*p, "%u %s=", size, keyword);
- *p += len;
-}
-
-static unsigned int extended_header_len(const char *keyword,
- unsigned int valuelen)
-{
- /* "%u %s=%s\n" */
- unsigned int len = 1 + 1 + strlen(keyword) + 1 + valuelen + 1;
- if (len > 9)
- len++;
- if (len > 99)
- len++;
- return len;
-}
-
-static void append_extended_header(char **p, const char *keyword,
- const char *value, unsigned int len)
-{
- unsigned int size = extended_header_len(keyword, len);
- append_extended_header_prefix(p, size, keyword);
- memcpy(*p, value, len);
- *p += len;
- append_char(p, '\n');
-}
-
-static void write_header(const unsigned char *, char, const char *, struct path_prefix *,
- const char *, unsigned int, void *, unsigned long);
-
-/* stores a pax extended header directly in the block buffer */
-static void write_extended_header(const char *headerfilename, int is_dir,
- unsigned int flags, const char *basepath,
- struct path_prefix *prefix,
- const char *path, unsigned int namelen,
- void *content, unsigned int contentsize)
-{
- char *buffer, *p;
- unsigned int pathlen, size, linkpathlen = 0;
-
- size = pathlen = extended_header_len("path", namelen);
- if (flags & EXT_HEADER_LINKPATH) {
- linkpathlen = extended_header_len("linkpath", contentsize);
- size += linkpathlen;
- }
- write_header(NULL, TYPEFLAG_EXT_HEADER, NULL, NULL, headerfilename,
- 0100600, NULL, size);
-
- buffer = p = malloc(size);
- if (!buffer)
- die("git-tar-tree: %s", strerror(errno));
- append_extended_header_prefix(&p, pathlen, "path");
- append_path(&p, is_dir, basepath, prefix, path);
- append_char(&p, '\n');
- if (flags & EXT_HEADER_LINKPATH)
- append_extended_header(&p, "linkpath", content, contentsize);
- write_blocked(buffer, size);
- free(buffer);
-}
-
-static void write_global_extended_header(const unsigned char *sha1)
-{
- char *p;
- unsigned int size;
-
- size = extended_header_len("comment", 40);
- write_header(NULL, TYPEFLAG_GLOBAL_HEADER, NULL, NULL,
- "pax_global_header", 0100600, NULL, size);
-
- p = get_record();
- append_extended_header(&p, "comment", sha1_to_hex(sha1), 40);
- write_if_needed();
-}
-
-/* stores a ustar header directly in the block buffer */
-static void write_header(const unsigned char *sha1, char typeflag, const char *basepath,
- struct path_prefix *prefix, const char *path,
- unsigned int mode, void *buffer, unsigned long size)
-{
- unsigned int namelen;
- char *header = NULL;
- unsigned int checksum = 0;
- int i;
- unsigned int ext_header = 0;
-
- if (typeflag == TYPEFLAG_AUTO) {
- if (S_ISDIR(mode))
- typeflag = TYPEFLAG_DIR;
- else if (S_ISLNK(mode))
- typeflag = TYPEFLAG_LNK;
- else
- typeflag = TYPEFLAG_REG;
- }
-
- namelen = path_len(S_ISDIR(mode), basepath, prefix, path);
- if (namelen > 100)
- ext_header |= EXT_HEADER_PATH;
- if (typeflag == TYPEFLAG_LNK && size > 100)
- ext_header |= EXT_HEADER_LINKPATH;
-
- /* the extended header must be written before the normal one */
- if (ext_header) {
- char headerfilename[51];
- sprintf(headerfilename, "%s.paxheader", sha1_to_hex(sha1));
- write_extended_header(headerfilename, S_ISDIR(mode),
- ext_header, basepath, prefix, path,
- namelen, buffer, size);
- }
-
- header = get_record();
-
- if (ext_header) {
- sprintf(header, "%s.data", sha1_to_hex(sha1));
- } else {
- char *p = header;
- append_path(&p, S_ISDIR(mode), basepath, prefix, path);
- }
-
- if (typeflag == TYPEFLAG_LNK) {
- if (ext_header & EXT_HEADER_LINKPATH) {
- sprintf(&header[157], "see %s.paxheader",
- sha1_to_hex(sha1));
- } else {
- if (buffer)
- strncpy(&header[157], buffer, size);
- }
- }
-
- if (S_ISDIR(mode))
- mode |= 0777;
- else if (S_ISREG(mode))
- mode |= (mode & 0100) ? 0777 : 0666;
- else if (S_ISLNK(mode))
- mode |= 0777;
- sprintf(&header[100], "%07o", mode & 07777);
-
- /* XXX: should we provide more meaningful info here? */
- sprintf(&header[108], "%07o", 0); /* uid */
- sprintf(&header[116], "%07o", 0); /* gid */
- strncpy(&header[265], "git", 31); /* uname */
- strncpy(&header[297], "git", 31); /* gname */
-
- if (S_ISDIR(mode) || S_ISLNK(mode))
- size = 0;
- sprintf(&header[124], "%011lo", size);
- sprintf(&header[136], "%011lo", archive_time);
-
- header[156] = typeflag;
-
- memcpy(&header[257], "ustar", 6);
- memcpy(&header[263], "00", 2);
-
- sprintf(&header[329], "%07o", 0); /* devmajor */
- sprintf(&header[337], "%07o", 0); /* devminor */
-
- memset(&header[148], ' ', 8);
- for (i = 0; i < RECORDSIZE; i++)
- checksum += header[i];
- sprintf(&header[148], "%07o", checksum & 0x1fffff);
-
- write_if_needed();
-}
-
-static void traverse_tree(struct tree_desc *tree,
- struct path_prefix *prefix)
-{
- struct path_prefix this_prefix;
- this_prefix.prev = prefix;
-
- while (tree->size) {
- const char *name;
- const unsigned char *sha1;
- unsigned mode;
- void *eltbuf;
- char elttype[20];
- unsigned long eltsize;
-
- sha1 = tree_entry_extract(tree, &name, &mode);
- update_tree_entry(tree);
-
- eltbuf = read_sha1_file(sha1, elttype, &eltsize);
- if (!eltbuf)
- die("cannot read %s", sha1_to_hex(sha1));
- write_header(sha1, TYPEFLAG_AUTO, basedir,
- prefix, name, mode, eltbuf, eltsize);
- if (S_ISDIR(mode)) {
- struct tree_desc subtree;
- subtree.buf = eltbuf;
- subtree.size = eltsize;
- this_prefix.name = name;
- traverse_tree(&subtree, &this_prefix);
- } else if (!S_ISLNK(mode)) {
- write_blocked(eltbuf, eltsize);
- }
- free(eltbuf);
- }
-}
-
-int main(int argc, char **argv)
-{
- unsigned char sha1[20];
- struct commit *commit;
- struct tree_desc tree;
-
- setup_git_directory();
-
- switch (argc) {
- case 3:
- basedir = argv[2];
- /* FALLTHROUGH */
- case 2:
- if (get_sha1(argv[1], sha1) < 0)
- usage(tar_tree_usage);
- break;
- default:
- usage(tar_tree_usage);
- }
-
- commit = lookup_commit_reference_gently(sha1, 1);
- if (commit) {
- write_global_extended_header(commit->object.sha1);
- archive_time = commit->date;
- }
- tree.buf = read_object_with_reference(sha1, "tree", &tree.size, NULL);
- if (!tree.buf)
- die("not a reference to a tag, commit or tree object: %s",
- sha1_to_hex(sha1));
- if (!archive_time)
- archive_time = time(NULL);
- if (basedir)
- write_header((unsigned char *)"0", TYPEFLAG_DIR, NULL, NULL,
- basedir, 040777, NULL, 0);
- traverse_tree(&tree, NULL);
- write_trailer();
- return 0;
-}
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