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-rw-r--r--builtin-archive.c263
1 files changed, 263 insertions, 0 deletions
diff --git a/builtin-archive.c b/builtin-archive.c
new file mode 100644
index 0000000000..6dabdee201
--- /dev/null
+++ b/builtin-archive.c
@@ -0,0 +1,263 @@
+/*
+ * Copyright (c) 2006 Franck Bui-Huu
+ * Copyright (c) 2006 Rene Scharfe
+ */
+#include <time.h>
+#include "cache.h"
+#include "builtin.h"
+#include "archive.h"
+#include "commit.h"
+#include "tree-walk.h"
+#include "exec_cmd.h"
+#include "pkt-line.h"
+#include "sideband.h"
+
+static const char archive_usage[] = \
+"git-archive --format=<fmt> [--prefix=<prefix>/] [--verbose] [<extra>] <tree-ish> [path...]";
+
+struct archiver archivers[] = {
+ {
+ .name = "tar",
+ .write_archive = write_tar_archive,
+ },
+ {
+ .name = "zip",
+ .write_archive = write_zip_archive,
+ .parse_extra = parse_extra_zip_args,
+ },
+};
+
+static int run_remote_archiver(const char *remote, int argc,
+ const char **argv)
+{
+ char *url, buf[LARGE_PACKET_MAX];
+ int fd[2], i, len, rv;
+ pid_t pid;
+ const char *exec = "git-upload-archive";
+ int exec_at = 0;
+
+ for (i = 1; i < argc; i++) {
+ const char *arg = argv[i];
+ if (!strncmp("--exec=", arg, 7)) {
+ if (exec_at)
+ die("multiple --exec specified");
+ exec = arg + 7;
+ exec_at = i;
+ break;
+ }
+ }
+
+ url = xstrdup(remote);
+ pid = git_connect(fd, url, exec);
+ if (pid < 0)
+ return pid;
+
+ for (i = 1; i < argc; i++) {
+ if (i == exec_at)
+ continue;
+ packet_write(fd[1], "argument %s\n", argv[i]);
+ }
+ packet_flush(fd[1]);
+
+ len = packet_read_line(fd[0], buf, sizeof(buf));
+ if (!len)
+ die("git-archive: expected ACK/NAK, got EOF");
+ if (buf[len-1] == '\n')
+ buf[--len] = 0;
+ if (strcmp(buf, "ACK")) {
+ if (len > 5 && !strncmp(buf, "NACK ", 5))
+ die("git-archive: NACK %s", buf + 5);
+ die("git-archive: protocol error");
+ }
+
+ len = packet_read_line(fd[0], buf, sizeof(buf));
+ if (len)
+ die("git-archive: expected a flush");
+
+ /* Now, start reading from fd[0] and spit it out to stdout */
+ rv = recv_sideband("archive", fd[0], 1, 2, buf, sizeof(buf));
+ close(fd[0]);
+ rv |= finish_connect(pid);
+
+ return !!rv;
+}
+
+static int init_archiver(const char *name, struct archiver *ar)
+{
+ int rv = -1, i;
+
+ for (i = 0; i < ARRAY_SIZE(archivers); i++) {
+ if (!strcmp(name, archivers[i].name)) {
+ memcpy(ar, &archivers[i], sizeof(struct archiver));
+ rv = 0;
+ break;
+ }
+ }
+ return rv;
+}
+
+void parse_pathspec_arg(const char **pathspec, struct archiver_args *ar_args)
+{
+ ar_args->pathspec = get_pathspec(ar_args->base, pathspec);
+}
+
+void parse_treeish_arg(const char **argv, struct archiver_args *ar_args,
+ const char *prefix)
+{
+ const char *name = argv[0];
+ const unsigned char *commit_sha1;
+ time_t archive_time;
+ struct tree *tree;
+ struct commit *commit;
+ unsigned char sha1[20];
+
+ if (get_sha1(name, sha1))
+ die("Not a valid object name");
+
+ commit = lookup_commit_reference_gently(sha1, 1);
+ if (commit) {
+ commit_sha1 = commit->object.sha1;
+ archive_time = commit->date;
+ } else {
+ commit_sha1 = NULL;
+ archive_time = time(NULL);
+ }
+
+ tree = parse_tree_indirect(sha1);
+ if (tree == NULL)
+ die("not a tree object");
+
+ if (prefix) {
+ unsigned char tree_sha1[20];
+ unsigned int mode;
+ int err;
+
+ err = get_tree_entry(tree->object.sha1, prefix,
+ tree_sha1, &mode);
+ if (err || !S_ISDIR(mode))
+ die("current working directory is untracked");
+
+ free(tree);
+ tree = parse_tree_indirect(tree_sha1);
+ }
+ ar_args->tree = tree;
+ ar_args->commit_sha1 = commit_sha1;
+ ar_args->time = archive_time;
+}
+
+int parse_archive_args(int argc, const char **argv, struct archiver *ar)
+{
+ const char *extra_argv[MAX_EXTRA_ARGS];
+ int extra_argc = 0;
+ const char *format = NULL; /* might want to default to "tar" */
+ const char *base = "";
+ int verbose = 0;
+ int i;
+
+ for (i = 1; i < argc; i++) {
+ const char *arg = argv[i];
+
+ if (!strcmp(arg, "--list") || !strcmp(arg, "-l")) {
+ for (i = 0; i < ARRAY_SIZE(archivers); i++)
+ printf("%s\n", archivers[i].name);
+ exit(0);
+ }
+ if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) {
+ verbose = 1;
+ continue;
+ }
+ if (!strncmp(arg, "--format=", 9)) {
+ format = arg + 9;
+ continue;
+ }
+ if (!strncmp(arg, "--prefix=", 9)) {
+ base = arg + 9;
+ continue;
+ }
+ if (!strcmp(arg, "--")) {
+ i++;
+ break;
+ }
+ if (arg[0] == '-') {
+ if (extra_argc > MAX_EXTRA_ARGS - 1)
+ die("Too many extra options");
+ extra_argv[extra_argc++] = arg;
+ continue;
+ }
+ break;
+ }
+
+ /* We need at least one parameter -- tree-ish */
+ if (argc - 1 < i)
+ usage(archive_usage);
+ if (!format)
+ die("You must specify an archive format");
+ if (init_archiver(format, ar) < 0)
+ die("Unknown archive format '%s'", format);
+
+ if (extra_argc) {
+ if (!ar->parse_extra)
+ die("'%s' format does not handle %s",
+ ar->name, extra_argv[0]);
+ ar->args.extra = ar->parse_extra(extra_argc, extra_argv);
+ }
+ ar->args.verbose = verbose;
+ ar->args.base = base;
+
+ return i;
+}
+
+static const char *extract_remote_arg(int *ac, const char **av)
+{
+ int ix, iy, cnt = *ac;
+ int no_more_options = 0;
+ const char *remote = NULL;
+
+ for (ix = iy = 1; ix < cnt; ix++) {
+ const char *arg = av[ix];
+ if (!strcmp(arg, "--"))
+ no_more_options = 1;
+ if (!no_more_options) {
+ if (!strncmp(arg, "--remote=", 9)) {
+ if (remote)
+ die("Multiple --remote specified");
+ remote = arg + 9;
+ continue;
+ }
+ if (arg[0] != '-')
+ no_more_options = 1;
+ }
+ if (ix != iy)
+ av[iy] = arg;
+ iy++;
+ }
+ if (remote) {
+ av[--cnt] = NULL;
+ *ac = cnt;
+ }
+ return remote;
+}
+
+int cmd_archive(int argc, const char **argv, const char *prefix)
+{
+ struct archiver ar;
+ int tree_idx;
+ const char *remote = NULL;
+
+ remote = extract_remote_arg(&argc, argv);
+ if (remote)
+ return run_remote_archiver(remote, argc, argv);
+
+ setlinebuf(stderr);
+
+ memset(&ar, 0, sizeof(ar));
+ tree_idx = parse_archive_args(argc, argv, &ar);
+ if (prefix == NULL)
+ prefix = setup_git_directory();
+
+ argv += tree_idx;
+ parse_treeish_arg(argv, &ar.args, prefix);
+ parse_pathspec_arg(argv + 1, &ar.args);
+
+ return ar.write_archive(&ar.args);
+}