#include "cache.h" #include "commit.h" #include "tree-walk.h" #include "attr.h" #include "archive.h" #include "parse-options.h" #include "unpack-trees.h" static char const * const archive_usage[] = { N_("git archive [options] <tree-ish> [<path>...]"), N_("git archive --list"), N_("git archive --remote <repo> [--exec <cmd>] [options] <tree-ish> [<path>...]"), N_("git archive --remote <repo> [--exec <cmd>] --list"), NULL }; static const struct archiver **archivers; static int nr_archivers; static int alloc_archivers; void register_archiver(struct archiver *ar) { ALLOC_GROW(archivers, nr_archivers + 1, alloc_archivers); archivers[nr_archivers++] = ar; } static void format_subst(const struct commit *commit, const char *src, size_t len, struct strbuf *buf) { char *to_free = NULL; struct strbuf fmt = STRBUF_INIT; struct pretty_print_context ctx = {0}; ctx.date_mode = DATE_NORMAL; ctx.abbrev = DEFAULT_ABBREV; if (src == buf->buf) to_free = strbuf_detach(buf, NULL); for (;;) { const char *b, *c; b = memmem(src, len, "$Format:", 8); if (!b) break; c = memchr(b + 8, '$', (src + len) - b - 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, &ctx); len -= c + 1 - src; src = c + 1; } strbuf_add(buf, src, len); strbuf_release(&fmt); free(to_free); } void *sha1_file_to_archive(const struct archiver_args *args, const char *path, const unsigned char *sha1, unsigned int mode, enum object_type *type, unsigned long *sizep) { void *buffer; const struct commit *commit = args->convert ? args->commit : NULL; path += args->baselen; buffer = read_sha1_file(sha1, type, sizep); if (buffer && S_ISREG(mode)) { struct strbuf buf = STRBUF_INIT; size_t size = 0; strbuf_attach(&buf, buffer, *sizep, *sizep + 1); convert_to_working_tree(path, buf.buf, buf.len, &buf); if (commit) format_subst(commit, buf.buf, buf.len, &buf); buffer = strbuf_detach(&buf, &size); *sizep = size; } return buffer; } static void setup_archive_check(struct git_attr_check *check) { static struct git_attr *attr_export_ignore; static struct git_attr *attr_export_subst; if (!attr_export_ignore) { attr_export_ignore = git_attr("export-ignore"); attr_export_subst = git_attr("export-subst"); } check[0].attr = attr_export_ignore; check[1].attr = attr_export_subst; } struct archiver_context { struct archiver_args *args; write_archive_entry_fn_t write_entry; }; static int write_archive_entry(const unsigned char *sha1, const char *base, int baselen, const char *filename, unsigned mode, int stage, void *context) { static struct strbuf path = STRBUF_INIT; struct archiver_context *c = context; struct archiver_args *args = c->args; write_archive_entry_fn_t write_entry = c->write_entry; struct git_attr_check check[2]; const char *path_without_prefix; int err; args->convert = 0; strbuf_reset(&path); strbuf_grow(&path, PATH_MAX); strbuf_add(&path, args->base, args->baselen); strbuf_add(&path, base, baselen); strbuf_addstr(&path, filename); if (S_ISDIR(mode) || S_ISGITLINK(mode)) strbuf_addch(&path, '/'); path_without_prefix = path.buf + args->baselen; setup_archive_check(check); if (!git_check_attr(path_without_prefix, ARRAY_SIZE(check), check)) { if (ATTR_TRUE(check[0].value)) return 0; args->convert = ATTR_TRUE(check[1].value); } if (S_ISDIR(mode) || S_ISGITLINK(mode)) { if (args->verbose) fprintf(stderr, "%.*s\n", (int)path.len, path.buf); err = write_entry(args, sha1, path.buf, path.len, mode); if (err) return err; return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0); } if (args->verbose) fprintf(stderr, "%.*s\n", (int)path.len, path.buf); return write_entry(args, sha1, path.buf, path.len, mode); } int write_archive_entries(struct archiver_args *args, write_archive_entry_fn_t write_entry) { struct archiver_context context; struct unpack_trees_options opts; struct tree_desc t; struct pathspec pathspec; int err; if (args->baselen > 0 && args->base[args->baselen - 1] == '/') { size_t len = args->baselen; while (len > 1 && args->base[len - 2] == '/') len--; if (args->verbose) fprintf(stderr, "%.*s\n", (int)len, args->base); err = write_entry(args, args->tree->object.sha1, args->base, len, 040777); if (err) return err; } context.args = args; context.write_entry = write_entry; /* * Setup index and instruct attr to read index only */ if (!args->worktree_attributes) { memset(&opts, 0, sizeof(opts)); opts.index_only = 1; opts.head_idx = -1; opts.src_index = &the_index; opts.dst_index = &the_index; opts.fn = oneway_merge; init_tree_desc(&t, args->tree->buffer, args->tree->size); if (unpack_trees(1, &t, &opts)) return -1; git_attr_set_direction(GIT_ATTR_INDEX, &the_index); } init_pathspec(&pathspec, args->pathspec); err = read_tree_recursive(args->tree, "", 0, 0, &pathspec, write_archive_entry, &context); free_pathspec(&pathspec); if (err == READ_TREE_RECURSIVE) err = 0; return err; } static const struct archiver *lookup_archiver(const char *name) { int i; if (!name) return NULL; for (i = 0; i < nr_archivers; i++) { if (!strcmp(name, archivers[i]->name)) return archivers[i]; } return NULL; } static int reject_entry(const unsigned char *sha1, const char *base, int baselen, const char *filename, unsigned mode, int stage, void *context) { return -1; } static int path_exists(struct tree *tree, const char *path) { const char *paths[] = { path, NULL }; struct pathspec pathspec; int ret; init_pathspec(&pathspec, paths); ret = read_tree_recursive(tree, "", 0, 0, &pathspec, reject_entry, NULL); free_pathspec(&pathspec); return ret != 0; } static void parse_pathspec_arg(const char **pathspec, struct archiver_args *ar_args) { ar_args->pathspec = pathspec = get_pathspec("", pathspec); if (pathspec) { while (*pathspec) { if (!path_exists(ar_args->tree, *pathspec)) die("path not found: %s", *pathspec); pathspec++; } } } static void parse_treeish_arg(const char **argv, struct archiver_args *ar_args, const char *prefix, int remote) { 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]; /* Remotes are only allowed to fetch actual refs */ if (remote) { char *ref = NULL; const char *colon = strchr(name, ':'); int refnamelen = colon ? colon - name : strlen(name); if (!dwim_ref(name, refnamelen, sha1, &ref)) die("no such ref: %.*s", refnamelen, name); free(ref); } 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; } #define OPT__COMPR(s, v, h, p) \ { OPTION_SET_INT, (s), NULL, (v), NULL, (h), \ PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, (p) } #define OPT__COMPR_HIDDEN(s, v, p) \ { OPTION_SET_INT, (s), NULL, (v), NULL, "", \ PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_HIDDEN, NULL, (p) } static int parse_archive_args(int argc, const char **argv, const struct archiver **ar, struct archiver_args *args, const char *name_hint, int is_remote) { const char *format = NULL; const char *base = NULL; const char *remote = NULL; const char *exec = NULL; const char *output = NULL; int compression_level = -1; int verbose = 0; int i; int list = 0; int worktree_attributes = 0; struct option opts[] = { OPT_GROUP(""), OPT_STRING(0, "format", &format, N_("fmt"), N_("archive format")), OPT_STRING(0, "prefix", &base, N_("prefix"), N_("prepend prefix to each pathname in the archive")), OPT_STRING('o', "output", &output, N_("file"), N_("write the archive to this file")), OPT_BOOL(0, "worktree-attributes", &worktree_attributes, N_("read .gitattributes in working directory")), OPT__VERBOSE(&verbose, N_("report archived files on stderr")), OPT__COMPR('0', &compression_level, N_("store only"), 0), OPT__COMPR('1', &compression_level, N_("compress faster"), 1), OPT__COMPR_HIDDEN('2', &compression_level, 2), OPT__COMPR_HIDDEN('3', &compression_level, 3), OPT__COMPR_HIDDEN('4', &compression_level, 4), OPT__COMPR_HIDDEN('5', &compression_level, 5), OPT__COMPR_HIDDEN('6', &compression_level, 6), OPT__COMPR_HIDDEN('7', &compression_level, 7), OPT__COMPR_HIDDEN('8', &compression_level, 8), OPT__COMPR('9', &compression_level, N_("compress better"), 9), OPT_GROUP(""), OPT_BOOL('l', "list", &list, N_("list supported archive formats")), OPT_GROUP(""), OPT_STRING(0, "remote", &remote, N_("repo"), N_("retrieve the archive from remote repository <repo>")), OPT_STRING(0, "exec", &exec, N_("command"), N_("path to the remote git-upload-archive command")), OPT_END() }; argc = parse_options(argc, argv, NULL, opts, archive_usage, 0); if (remote) die("Unexpected option --remote"); if (exec) die("Option --exec can only be used together with --remote"); if (output) die("Unexpected option --output"); if (!base) base = ""; if (list) { for (i = 0; i < nr_archivers; i++) if (!is_remote || archivers[i]->flags & ARCHIVER_REMOTE) printf("%s\n", archivers[i]->name); exit(0); } if (!format && name_hint) format = archive_format_from_filename(name_hint); if (!format) format = "tar"; /* We need at least one parameter -- tree-ish */ if (argc < 1) usage_with_options(archive_usage, opts); *ar = lookup_archiver(format); if (!*ar || (is_remote && !((*ar)->flags & ARCHIVER_REMOTE))) die("Unknown archive format '%s'", format); args->compression_level = Z_DEFAULT_COMPRESSION; if (compression_level != -1) { if ((*ar)->flags & ARCHIVER_WANT_COMPRESSION_LEVELS) args->compression_level = compression_level; else { die("Argument not supported for format '%s': -%d", format, compression_level); } } args->verbose = verbose; args->base = base; args->baselen = strlen(base); args->worktree_attributes = worktree_attributes; return argc; } int write_archive(int argc, const char **argv, const char *prefix, int setup_prefix, const char *name_hint, int remote) { int nongit = 0; const struct archiver *ar = NULL; struct archiver_args args; if (setup_prefix && prefix == NULL) prefix = setup_git_directory_gently(&nongit); git_config(git_default_config, NULL); init_tar_archiver(); init_zip_archiver(); argc = parse_archive_args(argc, argv, &ar, &args, name_hint, remote); if (nongit) { /* * We know this will die() with an error, so we could just * die ourselves; but its error message will be more specific * than what we could write here. */ setup_git_directory(); } parse_treeish_arg(argv, &args, prefix, remote); parse_pathspec_arg(argv + 1, &args); return ar->write_archive(ar, &args); } static int match_extension(const char *filename, const char *ext) { int prefixlen = strlen(filename) - strlen(ext); /* * We need 1 character for the '.', and 1 character to ensure that the * prefix is non-empty (k.e., we don't match .tar.gz with no actual * filename). */ if (prefixlen < 2 || filename[prefixlen-1] != '.') return 0; return !strcmp(filename + prefixlen, ext); } const char *archive_format_from_filename(const char *filename) { int i; for (i = 0; i < nr_archivers; i++) if (match_extension(filename, archivers[i]->name)) return archivers[i]->name; return NULL; }