/*
* Copyright (c) 2005, 2006 Rene Scharfe
*/
-#include <time.h>
#include "cache.h"
-#include "tree-walk.h"
#include "commit.h"
-#include "strbuf.h"
#include "tar.h"
#include "builtin.h"
-#include "pkt-line.h"
-
-#define RECORDSIZE (512)
-#define BLOCKSIZE (RECORDSIZE * 20)
+#include "quote.h"
static const char tar_tree_usage[] =
-"git-tar-tree [--remote=<repo>] <ent> [basedir]";
-
-static char block[BLOCKSIZE];
-static unsigned long offset;
-
-static time_t archive_time;
-static int tar_umask;
-
-/* tries hard to write, either succeeds or dies in the attempt */
-static void reliable_write(const void *data, unsigned long size)
-{
- const char *buf = data;
-
- 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;
- }
-}
-
-/*
- * queues up writes, so that all our write(2) calls write exactly one
- * full block; pads writes to RECORDSIZE
- */
-static void write_blocked(const void *data, unsigned long size)
-{
- const char *buf = data;
- 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);
- offset += size;
- }
- tail = offset % RECORDSIZE;
- if (tail) {
- memset(block + offset, 0, RECORDSIZE - tail);
- offset += RECORDSIZE - tail;
- }
- write_if_needed();
-}
-
-/*
- * The end of tar archives is marked by 2*512 nul bytes and after that
- * follows the rest of the block (if any).
- */
-static void write_trailer(void)
-{
- int tail = BLOCKSIZE - offset;
- memset(block + offset, 0, tail);
- reliable_write(block, BLOCKSIZE);
- if (tail < 2 * RECORDSIZE) {
- memset(block, 0, offset);
- reliable_write(block, BLOCKSIZE);
- }
-}
-
-static void strbuf_append_string(struct strbuf *sb, const char *s)
-{
- int slen = strlen(s);
- int total = sb->len + slen;
- if (total > sb->alloc) {
- sb->buf = xrealloc(sb->buf, total);
- sb->alloc = total;
- }
- memcpy(sb->buf + sb->len, s, slen);
- sb->len = total;
-}
-
-/*
- * pax extended header records have the format "%u %s=%s\n". %u contains
- * the size of the whole string (including the %u), the first %s is the
- * keyword, the second one is the value. This function constructs such a
- * string and appends it to a struct strbuf.
- */
-static void strbuf_append_ext_header(struct strbuf *sb, const char *keyword,
- const char *value, unsigned int valuelen)
-{
- char *p;
- int len, total, tmp;
-
- /* "%u %s=%s\n" */
- len = 1 + 1 + strlen(keyword) + 1 + valuelen + 1;
- for (tmp = len; tmp > 9; tmp /= 10)
- len++;
-
- total = sb->len + len;
- if (total > sb->alloc) {
- sb->buf = xrealloc(sb->buf, total);
- sb->alloc = total;
- }
-
- p = sb->buf;
- p += sprintf(p, "%u %s=", len, keyword);
- memcpy(p, value, valuelen);
- p += valuelen;
- *p = '\n';
- sb->len = total;
-}
-
-static unsigned int ustar_header_chksum(const struct ustar_header *header)
-{
- char *p = (char *)header;
- unsigned int chksum = 0;
- while (p < header->chksum)
- chksum += *p++;
- chksum += sizeof(header->chksum) * ' ';
- p += sizeof(header->chksum);
- while (p < (char *)header + sizeof(struct ustar_header))
- chksum += *p++;
- return chksum;
-}
-
-static int get_path_prefix(const struct strbuf *path, int maxlen)
-{
- int i = path->len;
- if (i > maxlen)
- i = maxlen;
- do {
- i--;
- } while (i > 0 && path->buf[i] != '/');
- return i;
-}
-
-static void write_entry(const unsigned char *sha1, struct strbuf *path,
- unsigned int mode, void *buffer, unsigned long size)
-{
- struct ustar_header header;
- struct strbuf ext_header;
-
- memset(&header, 0, sizeof(header));
- ext_header.buf = NULL;
- ext_header.len = ext_header.alloc = 0;
-
- if (!sha1) {
- *header.typeflag = TYPEFLAG_GLOBAL_HEADER;
- mode = 0100666;
- strcpy(header.name, "pax_global_header");
- } else if (!path) {
- *header.typeflag = TYPEFLAG_EXT_HEADER;
- mode = 0100666;
- sprintf(header.name, "%s.paxheader", sha1_to_hex(sha1));
- } else {
- if (S_ISDIR(mode)) {
- *header.typeflag = TYPEFLAG_DIR;
- mode = (mode | 0777) & ~tar_umask;
- } else if (S_ISLNK(mode)) {
- *header.typeflag = TYPEFLAG_LNK;
- mode |= 0777;
- } else if (S_ISREG(mode)) {
- *header.typeflag = TYPEFLAG_REG;
- mode = (mode | ((mode & 0100) ? 0777 : 0666)) & ~tar_umask;
- } else {
- error("unsupported file mode: 0%o (SHA1: %s)",
- mode, sha1_to_hex(sha1));
- return;
- }
- if (path->len > sizeof(header.name)) {
- int plen = get_path_prefix(path, sizeof(header.prefix));
- int rest = path->len - plen - 1;
- if (plen > 0 && rest <= sizeof(header.name)) {
- memcpy(header.prefix, path->buf, plen);
- memcpy(header.name, path->buf + plen + 1, rest);
- } else {
- sprintf(header.name, "%s.data",
- sha1_to_hex(sha1));
- strbuf_append_ext_header(&ext_header, "path",
- path->buf, path->len);
- }
- } else
- memcpy(header.name, path->buf, path->len);
- }
-
- if (S_ISLNK(mode) && buffer) {
- if (size > sizeof(header.linkname)) {
- sprintf(header.linkname, "see %s.paxheader",
- sha1_to_hex(sha1));
- strbuf_append_ext_header(&ext_header, "linkpath",
- buffer, size);
- } else
- memcpy(header.linkname, buffer, size);
- }
-
- sprintf(header.mode, "%07o", mode & 07777);
- sprintf(header.size, "%011lo", S_ISREG(mode) ? size : 0);
- sprintf(header.mtime, "%011lo", archive_time);
-
- /* XXX: should we provide more meaningful info here? */
- sprintf(header.uid, "%07o", 0);
- sprintf(header.gid, "%07o", 0);
- strlcpy(header.uname, "git", sizeof(header.uname));
- strlcpy(header.gname, "git", sizeof(header.gname));
- sprintf(header.devmajor, "%07o", 0);
- sprintf(header.devminor, "%07o", 0);
-
- memcpy(header.magic, "ustar", 6);
- memcpy(header.version, "00", 2);
-
- sprintf(header.chksum, "%07o", ustar_header_chksum(&header));
-
- if (ext_header.len > 0) {
- write_entry(sha1, NULL, 0, ext_header.buf, ext_header.len);
- free(ext_header.buf);
- }
- write_blocked(&header, sizeof(header));
- if (S_ISREG(mode) && buffer && size > 0)
- write_blocked(buffer, size);
-}
-
-static void write_global_extended_header(const unsigned char *sha1)
-{
- struct strbuf ext_header;
- ext_header.buf = NULL;
- ext_header.len = ext_header.alloc = 0;
- strbuf_append_ext_header(&ext_header, "comment", sha1_to_hex(sha1), 40);
- write_entry(NULL, NULL, 0, ext_header.buf, ext_header.len);
- free(ext_header.buf);
-}
-
-static void traverse_tree(struct tree_desc *tree, struct strbuf *path)
-{
- int pathlen = path->len;
- struct name_entry entry;
-
- while (tree_entry(tree, &entry)) {
- void *eltbuf;
- char elttype[20];
- unsigned long eltsize;
+"git-tar-tree [--remote=<repo>] <tree-ish> [basedir]\n"
+"*** Note that this command is now deprecated; use git-archive instead.";
- eltbuf = read_sha1_file(entry.sha1, elttype, &eltsize);
- if (!eltbuf)
- die("cannot read %s", sha1_to_hex(entry.sha1));
-
- path->len = pathlen;
- strbuf_append_string(path, entry.path);
- if (S_ISDIR(entry.mode))
- strbuf_append_string(path, "/");
-
- write_entry(entry.sha1, path, entry.mode, eltbuf, eltsize);
-
- if (S_ISDIR(entry.mode)) {
- struct tree_desc subtree;
- subtree.buf = eltbuf;
- subtree.size = eltsize;
- traverse_tree(&subtree, path);
- }
- free(eltbuf);
- }
-}
-
-int git_tar_config(const char *var, const char *value)
+int cmd_tar_tree(int argc, const char **argv, const char *prefix)
{
- if (!strcmp(var, "tar.umask")) {
- if (!strcmp(value, "user")) {
- tar_umask = umask(0);
- umask(tar_umask);
- } else {
- tar_umask = git_config_int(var, value);
- }
- return 0;
+ /*
+ * git-tar-tree is now a wrapper around git-archive --format=tar
+ *
+ * $0 --remote=<repo> arg... ==>
+ * git-archive --format=tar --remote=<repo> arg...
+ * $0 tree-ish ==>
+ * git-archive --format=tar tree-ish
+ * $0 tree-ish basedir ==>
+ * git-archive --format-tar --prefix=basedir tree-ish
+ */
+ int i;
+ const char **nargv = xcalloc(sizeof(*nargv), argc + 2);
+ char *basedir_arg;
+ int nargc = 0;
+
+ nargv[nargc++] = "git-archive";
+ nargv[nargc++] = "--format=tar";
+
+ if (2 <= argc && !strncmp("--remote=", argv[1], 9)) {
+ nargv[nargc++] = argv[1];
+ argv++;
+ argc--;
}
- return git_default_config(var, value);
-}
-
-static int generate_tar(int argc, const char **argv, const char *prefix)
-{
- unsigned char sha1[20], tree_sha1[20];
- struct commit *commit;
- struct tree_desc tree;
- struct strbuf current_path;
- void *buffer;
-
- current_path.buf = xmalloc(PATH_MAX);
- current_path.alloc = PATH_MAX;
- current_path.len = current_path.eof = 0;
-
- git_config(git_tar_config);
-
switch (argc) {
- case 3:
- strbuf_append_string(¤t_path, argv[2]);
- strbuf_append_string(¤t_path, "/");
- /* FALLTHROUGH */
- case 2:
- if (get_sha1(argv[1], sha1))
- die("Not a valid object name %s", argv[1]);
- break;
default:
usage(tar_tree_usage);
+ break;
+ case 3:
+ /* base-path */
+ basedir_arg = xmalloc(strlen(argv[2]) + 11);
+ sprintf(basedir_arg, "--prefix=%s/", argv[2]);
+ nargv[nargc++] = basedir_arg;
+ /* fallthru */
+ case 2:
+ /* tree-ish */
+ nargv[nargc++] = argv[1];
}
+ nargv[nargc] = NULL;
- commit = lookup_commit_reference_gently(sha1, 1);
- if (commit) {
- write_global_extended_header(commit->object.sha1);
- archive_time = commit->date;
- } else
- archive_time = time(NULL);
-
- tree.buf = buffer = read_object_with_reference(sha1, tree_type,
- &tree.size, tree_sha1);
- if (!tree.buf)
- die("not a reference to a tag, commit or tree object: %s",
- sha1_to_hex(sha1));
-
- if (current_path.len > 0)
- write_entry(tree_sha1, ¤t_path, 040777, NULL, 0);
- traverse_tree(&tree, ¤t_path);
- write_trailer();
- free(buffer);
- free(current_path.buf);
- return 0;
-}
-
-static const char *exec = "git-upload-tar";
-
-static int remote_tar(int argc, const char **argv)
-{
- int fd[2], ret, len;
- pid_t pid;
- char buf[1024];
- char *url;
-
- if (argc < 3 || 4 < argc)
- usage(tar_tree_usage);
-
- /* --remote=<repo> */
- url = strdup(argv[1]+9);
- pid = git_connect(fd, url, exec);
- if (pid < 0)
- return 1;
-
- packet_write(fd[1], "want %s\n", argv[2]);
- if (argv[3])
- packet_write(fd[1], "base %s\n", argv[3]);
- packet_flush(fd[1]);
-
- len = packet_read_line(fd[0], buf, sizeof(buf));
- if (!len)
- die("git-tar-tree: expected ACK/NAK, got EOF");
- if (buf[len-1] == '\n')
- buf[--len] = 0;
- if (strcmp(buf, "ACK")) {
- if (5 < len && !strncmp(buf, "NACK ", 5))
- die("git-tar-tree: NACK %s", buf + 5);
- die("git-tar-tree: protocol error");
+ fprintf(stderr,
+ "*** git-tar-tree is now deprecated.\n"
+ "*** Running git-archive instead.\n***");
+ for (i = 0; i < nargc; i++) {
+ fputc(' ', stderr);
+ sq_quote_print(stderr, nargv[i]);
}
- /* expect a flush */
- len = packet_read_line(fd[0], buf, sizeof(buf));
- if (len)
- die("git-tar-tree: expected a flush");
-
- /* Now, start reading from fd[0] and spit it out to stdout */
- ret = copy_fd(fd[0], 1);
- close(fd[0]);
-
- ret |= finish_connect(pid);
- return !!ret;
-}
-
-int cmd_tar_tree(int argc, const char **argv, const char *prefix)
-{
- if (argc < 2)
- usage(tar_tree_usage);
- if (!strncmp("--remote=", argv[1], 9))
- return remote_tar(argc, argv);
- return generate_tar(argc, argv, prefix);
+ fputc('\n', stderr);
+ return cmd_archive(nargc, nargv, prefix);
}
/* ustar header + extended global header content */
+#define RECORDSIZE (512)
#define HEADERSIZE (2 * RECORDSIZE)
int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix)
char *content = buffer + RECORDSIZE;
ssize_t n;
- n = xread(0, buffer, HEADERSIZE);
+ n = read_in_full(0, buffer, HEADERSIZE);
if (n < HEADERSIZE)
die("git-get-tar-commit-id: read error");
if (header->typeflag[0] != 'g')
if (memcmp(content, "52 comment=", 11))
return 1;
- n = xwrite(1, content + 11, 41);
+ n = write_in_full(1, content + 11, 41);
if (n < 41)
die("git-get-tar-commit-id: write error");