builtin-fast-export.c: handle nested tags
[gitweb.git] / builtin-archive.c
index 6f29c2f40a01b3c60eaa9ecfa1ca4d63fe90c8eb..ab50cebba0e6798996cc007ced9079c3f0b94a29 100644 (file)
 #include "cache.h"
 #include "builtin.h"
 #include "archive.h"
-#include "commit.h"
-#include "tree-walk.h"
-#include "exec_cmd.h"
+#include "parse-options.h"
 #include "pkt-line.h"
 #include "sideband.h"
-#include "attr.h"
 
-static const char archive_usage[] = \
-"git-archive --format=<fmt> [--prefix=<prefix>/] [--verbose] [<extra>] <tree-ish> [path...]";
-
-static struct archiver_desc
+static void create_output_file(const char *output_file)
 {
-       const char *name;
-       write_archive_fn_t write_archive;
-       parse_extra_args_fn_t parse_extra;
-} archivers[] = {
-       { "tar", write_tar_archive, NULL },
-       { "zip", write_zip_archive, parse_extra_zip_args },
-};
+       int output_fd = open(output_file, O_CREAT | O_WRONLY | O_TRUNC, 0666);
+       if (output_fd < 0)
+               die("could not create archive file: %s ", output_file);
+       if (output_fd != 1) {
+               if (dup2(output_fd, 1) < 0)
+                       die("could not redirect output");
+               else
+                       close(output_fd);
+       }
+}
 
-static int run_remote_archiver(const char *remote, int argc,
-                              const char **argv)
+static int run_remote_archiver(int argc, const char **argv,
+                              const char *remote, const char *exec)
 {
        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 (!prefixcmp(arg, "--exec=")) {
-                       if (exec_at)
-                               die("multiple --exec specified");
-                       exec = arg + 7;
-                       exec_at = i;
-                       break;
-               }
-       }
+       struct child_process *conn;
 
        url = xstrdup(remote);
-       pid = git_connect(fd, url, exec, 0);
-       if (pid < 0)
-               return pid;
+       conn = git_connect(fd, url, exec, 0);
 
-       for (i = 1; i < argc; i++) {
-               if (i == exec_at)
-                       continue;
+       for (i = 1; i < argc; i++)
                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");
+               die("git archive: expected ACK/NAK, got EOF");
        if (buf[len-1] == '\n')
                buf[--len] = 0;
        if (strcmp(buf, "ACK")) {
                if (len > 5 && !prefixcmp(buf, "NACK "))
-                       die("git-archive: NACK %s", buf + 5);
-               die("git-archive: protocol error");
+                       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");
+               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);
+       rv = recv_sideband("archive", fd[0], 1);
        close(fd[0]);
        close(fd[1]);
-       rv |= finish_connect(pid);
+       rv |= finish_connect(conn);
 
        return !!rv;
 }
 
-static void format_subst(const struct commit *commit,
-                         const char *src, size_t len,
-                         struct strbuf *buf)
-{
-       char *to_free = NULL;
-       struct strbuf fmt;
-
-       if (src == buf->buf)
-               to_free = strbuf_detach(buf, NULL);
-       strbuf_init(&fmt, 0);
-       for (;;) {
-               const char *b, *c;
-
-               b = memmem(src, len, "$Format:", 8);
-               if (!b || src + len < b + 9)
-                       break;
-               c = memchr(b + 8, '$', len - 8);
-               if (!c)
-                       break;
-
-               strbuf_reset(&fmt);
-               strbuf_add(&fmt, b + 8, c - b - 8);
-
-               strbuf_add(buf, src, b - src);
-               format_commit_message(commit, fmt.buf, buf);
-               len -= c + 1 - src;
-               src  = c + 1;
-       }
-       strbuf_add(buf, src, len);
-       strbuf_release(&fmt);
-       free(to_free);
-}
-
-static int convert_to_archive(const char *path,
-                              const void *src, size_t len,
-                              struct strbuf *buf,
-                              const struct commit *commit)
-{
-       static struct git_attr *attr_export_subst;
-       struct git_attr_check check[1];
-
-       if (!commit)
-               return 0;
-
-       if (!attr_export_subst)
-               attr_export_subst = git_attr("export-subst", 12);
-
-       check[0].attr = attr_export_subst;
-       if (git_checkattr(path, ARRAY_SIZE(check), check))
-               return 0;
-       if (!ATTR_TRUE(check[0].value))
-               return 0;
-
-       format_subst(commit, src, len, buf);
-       return 1;
-}
-
-void *sha1_file_to_archive(const char *path, const unsigned char *sha1,
-                           unsigned int mode, enum object_type *type,
-                           unsigned long *sizep,
-                           const struct commit *commit)
-{
-       void *buffer;
-
-       buffer = read_sha1_file(sha1, type, sizep);
-       if (buffer && S_ISREG(mode)) {
-               struct strbuf buf;
-               size_t size = 0;
-
-               strbuf_init(&buf, 0);
-               strbuf_attach(&buf, buffer, *sizep, *sizep + 1);
-               convert_to_working_tree(path, buf.buf, buf.len, &buf);
-               convert_to_archive(path, buf.buf, buf.len, &buf, commit);
-               buffer = strbuf_detach(&buf, &size);
-               *sizep = size;
-       }
+#define PARSE_OPT_KEEP_ALL ( PARSE_OPT_KEEP_DASHDASH |         \
+                            PARSE_OPT_KEEP_ARGV0 |     \
+                            PARSE_OPT_KEEP_UNKNOWN |   \
+                            PARSE_OPT_NO_INTERNAL_HELP )
 
-       return buffer;
-}
-
-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)) {
-                       memset(ar, 0, sizeof(*ar));
-                       ar->name = archivers[i].name;
-                       ar->write_archive = archivers[i].write_archive;
-                       ar->parse_extra = archivers[i].parse_extra;
-                       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;
-       const 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");
-
-               tree = parse_tree_indirect(tree_sha1);
-       }
-       ar_args->tree = tree;
-       ar_args->commit_sha1 = commit_sha1;
-       ar_args->commit = commit;
-       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 = "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 (!prefixcmp(arg, "--format=")) {
-                       format = arg + 9;
-                       continue;
-               }
-               if (!prefixcmp(arg, "--prefix=")) {
-                       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 (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 cmd_archive(int argc, const char **argv, const char *prefix)
 {
-       int ix, iy, cnt = *ac;
-       int no_more_options = 0;
+       const char *exec = "git-upload-archive";
+       const char *output = NULL;
        const char *remote = NULL;
+       struct option local_opts[] = {
+               OPT_STRING(0, "output", &output, "file",
+                       "write the archive to this file"),
+               OPT_STRING(0, "remote", &remote, "repo",
+                       "retrieve the archive from remote repository <repo>"),
+               OPT_STRING(0, "exec", &exec, "cmd",
+                       "path to the remote git-upload-archive command"),
+               OPT_END()
+       };
 
-       for (ix = iy = 1; ix < cnt; ix++) {
-               const char *arg = av[ix];
-               if (!strcmp(arg, "--"))
-                       no_more_options = 1;
-               if (!no_more_options) {
-                       if (!prefixcmp(arg, "--remote=")) {
-                               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;
-}
+       argc = parse_options(argc, argv, local_opts, NULL, PARSE_OPT_KEEP_ALL);
 
-int cmd_archive(int argc, const char **argv, const char *prefix)
-{
-       struct archiver ar;
-       int tree_idx;
-       const char *remote = NULL;
+       if (output)
+               create_output_file(output);
 
-       remote = extract_remote_arg(&argc, argv);
        if (remote)
-               return run_remote_archiver(remote, argc, argv);
+               return run_remote_archiver(argc, argv, remote, exec);
 
        setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
 
-       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);
+       return write_archive(argc, argv, prefix, 1);
 }