git-receive-pack$X git-rev-parse$X \
git-send-pack$X git-show-branch$X git-shell$X \
git-show-index$X git-ssh-fetch$X \
- git-ssh-upload$X git-tar-tree$X git-unpack-file$X \
+ git-ssh-upload$X git-unpack-file$X \
git-unpack-objects$X git-update-index$X git-update-server-info$X \
git-upload-pack$X git-verify-pack$X git-write-tree$X \
git-update-ref$X git-symbolic-ref$X \
BUILT_INS = git-log$X git-whatchanged$X git-show$X \
git-count-objects$X git-diff$X git-push$X \
git-grep$X git-rev-list$X git-check-ref-format$X \
- git-init-db$X
+ git-init-db$X git-tar-tree$X git-upload-tar$X
# what 'all' will build and 'install' will install, in gitexecdir
ALL_PROGRAMS = $(PROGRAMS) $(SIMPLE_PROGRAMS) $(SCRIPTS)
BUILTIN_OBJS = \
builtin-log.o builtin-help.o builtin-count.o builtin-diff.o builtin-push.o \
builtin-grep.o builtin-rev-list.o builtin-check-ref-format.o \
- builtin-init-db.o
+ builtin-init-db.o builtin-tar-tree.o builtin-upload-tar.o
GITLIBS = $(LIB_FILE) $(XDIFF_LIB)
LIBS = $(GITLIBS) -lz
--- /dev/null
+/*
+ * 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)
+
+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;
+
+/* 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);
+ offset += size;
+ }
+ tail = offset % RECORDSIZE;
+ if (tail) {
+ memset(block + offset, 0, RECORDSIZE - tail);
+ offset += RECORDSIZE - tail;
+ }
+ write_if_needed();
+}
+
+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;
+ while (i > 0 && path->buf[i] != '/')
+ 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 |= 0777;
+ } else if (S_ISLNK(mode)) {
+ *header.typeflag = TYPEFLAG_LNK;
+ mode |= 0777;
+ } else if (S_ISREG(mode)) {
+ *header.typeflag = TYPEFLAG_REG;
+ mode |= (mode & 0100) ? 0777 : 0666;
+ } 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);
+ strncpy(header.uname, "git", 31);
+ strncpy(header.gname, "git", 31);
+ 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;
+
+ 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));
+
+ path->len = pathlen;
+ strbuf_append_string(path, name);
+ if (S_ISDIR(mode))
+ strbuf_append_string(path, "/");
+
+ write_entry(sha1, path, mode, eltbuf, eltsize);
+
+ if (S_ISDIR(mode)) {
+ struct tree_desc subtree;
+ subtree.buf = eltbuf;
+ subtree.size = eltsize;
+ traverse_tree(&subtree, path);
+ }
+ free(eltbuf);
+ }
+}
+
+int generate_tar(int argc, const char **argv)
+{
+ unsigned char sha1[20], tree_sha1[20];
+ struct commit *commit;
+ struct tree_desc tree;
+ struct strbuf current_path;
+
+ current_path.buf = xmalloc(PATH_MAX);
+ current_path.alloc = PATH_MAX;
+ current_path.len = current_path.eof = 0;
+
+ setup_git_directory();
+ git_config(git_default_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);
+ }
+
+ 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 = 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(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");
+ }
+ /* 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, char **envp)
+{
+ if (argc < 2)
+ usage(tar_tree_usage);
+ if (!strncmp("--remote=", argv[1], 9))
+ return remote_tar(argc, argv);
+ return generate_tar(argc, argv);
+}
--- /dev/null
+/*
+ * Copyright (c) 2006 Junio C Hamano
+ */
+#include "cache.h"
+#include "pkt-line.h"
+#include "exec_cmd.h"
+#include "builtin.h"
+
+static const char upload_tar_usage[] = "git-upload-tar <repo>";
+
+static int nak(const char *reason)
+{
+ packet_write(1, "NACK %s\n", reason);
+ packet_flush(1);
+ return 1;
+}
+
+int cmd_upload_tar(int argc, const char **argv, char **envp)
+{
+ int len;
+ const char *dir = argv[1];
+ char buf[8192];
+ unsigned char sha1[20];
+ char *base = NULL;
+ char hex[41];
+ int ac;
+ const char *av[4];
+
+ if (argc != 2)
+ usage(upload_tar_usage);
+ if (strlen(dir) < sizeof(buf)-1)
+ strcpy(buf, dir); /* enter-repo smudges its argument */
+ else
+ packet_write(1, "NACK insanely long repository name %s\n", dir);
+ if (!enter_repo(buf, 0)) {
+ packet_write(1, "NACK not a git archive %s\n", dir);
+ packet_flush(1);
+ return 1;
+ }
+
+ len = packet_read_line(0, buf, sizeof(buf));
+ if (len < 5 || strncmp("want ", buf, 5))
+ return nak("expected want");
+ if (buf[len-1] == '\n')
+ buf[--len] = 0;
+ if (get_sha1(buf + 5, sha1))
+ return nak("expected sha1");
+ strcpy(hex, sha1_to_hex(sha1));
+
+ len = packet_read_line(0, buf, sizeof(buf));
+ if (len) {
+ if (len < 5 || strncmp("base ", buf, 5))
+ return nak("expected (optional) base");
+ if (buf[len-1] == '\n')
+ buf[--len] = 0;
+ base = strdup(buf + 5);
+ len = packet_read_line(0, buf, sizeof(buf));
+ }
+ if (len)
+ return nak("expected flush");
+
+ packet_write(1, "ACK\n");
+ packet_flush(1);
+
+ ac = 0;
+ av[ac++] = "tar-tree";
+ av[ac++] = hex;
+ if (base)
+ av[ac++] = base;
+ av[ac++] = NULL;
+ execv_git_cmd(av);
+ /* should it return that is an error */
+ return 1;
+}
extern int cmd_rev_list(int argc, const char **argv, char **envp);
extern int cmd_check_ref_format(int argc, const char **argv, char **envp);
extern int cmd_init_db(int argc, const char **argv, char **envp);
+extern int cmd_tar_tree(int argc, const char **argv, char **envp);
+extern int cmd_upload_tar(int argc, const char **argv, char **envp);
#endif
{ "count-objects", cmd_count_objects },
{ "diff", cmd_diff },
{ "grep", cmd_grep },
- { "rev-list", cmd_rev_list },
{ "init-db", cmd_init_db },
+ { "tar-tree", cmd_tar_tree },
+ { "upload-tar", cmd_upload_tar },
+ { "rev-list", cmd_rev_list },
{ "check-ref-format", cmd_check_ref_format }
};
int i;
+++ /dev/null
-/*
- * 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"
-
-#define RECORDSIZE (512)
-#define BLOCKSIZE (RECORDSIZE * 20)
-
-static const char tar_tree_usage[] = "git-tar-tree <key> [basedir]";
-
-static char block[BLOCKSIZE];
-static unsigned long offset;
-
-static time_t archive_time;
-
-/* 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);
- offset += size;
- }
- tail = offset % RECORDSIZE;
- if (tail) {
- memset(block + offset, 0, RECORDSIZE - tail);
- offset += RECORDSIZE - tail;
- }
- write_if_needed();
-}
-
-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;
- while (i > 0 && path->buf[i] != '/')
- 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 |= 0777;
- } else if (S_ISLNK(mode)) {
- *header.typeflag = TYPEFLAG_LNK;
- mode |= 0777;
- } else if (S_ISREG(mode)) {
- *header.typeflag = TYPEFLAG_REG;
- mode |= (mode & 0100) ? 0777 : 0666;
- } 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);
- strncpy(header.uname, "git", 31);
- strncpy(header.gname, "git", 31);
- 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;
-
- 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));
-
- path->len = pathlen;
- strbuf_append_string(path, name);
- if (S_ISDIR(mode))
- strbuf_append_string(path, "/");
-
- write_entry(sha1, path, mode, eltbuf, eltsize);
-
- if (S_ISDIR(mode)) {
- struct tree_desc subtree;
- subtree.buf = eltbuf;
- subtree.size = eltsize;
- traverse_tree(&subtree, path);
- }
- free(eltbuf);
- }
-}
-
-int main(int argc, char **argv)
-{
- unsigned char sha1[20], tree_sha1[20];
- struct commit *commit;
- struct tree_desc tree;
- struct strbuf current_path;
-
- current_path.buf = xmalloc(PATH_MAX);
- current_path.alloc = PATH_MAX;
- current_path.len = current_path.eof = 0;
-
- setup_git_directory();
- git_config(git_default_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);
- }
-
- 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 = 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(current_path.buf);
- return 0;
-}
projects / git.git / commitdiff