diff options
Diffstat (limited to 'archive.c')
| -rw-r--r-- | archive.c | 137 |
1 files changed, 102 insertions, 35 deletions
@@ -14,16 +14,15 @@ static char const * const archive_usage[] = { NULL }; -#define USES_ZLIB_COMPRESSION 1 - -static const struct archiver { - const char *name; - write_archive_fn_t write_archive; - unsigned int flags; -} archivers[] = { - { "tar", write_tar_archive }, - { "zip", write_zip_archive, USES_ZLIB_COMPRESSION }, -}; +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, @@ -124,7 +123,7 @@ static int write_archive_entry(const unsigned char *sha1, const char *base, path_without_prefix = path.buf + args->baselen; setup_archive_check(check); - if (!git_checkattr(path_without_prefix, ARRAY_SIZE(check), check)) { + if (!git_check_attr(path_without_prefix, ARRAY_SIZE(check), check)) { if (ATTR_TRUE(check[0].value)) return 0; convert = ATTR_TRUE(check[1].value); @@ -157,6 +156,7 @@ int write_archive_entries(struct archiver_args *args, 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] == '/') { @@ -191,8 +191,10 @@ int write_archive_entries(struct archiver_args *args, git_attr_set_direction(GIT_ATTR_INDEX, &the_index); } - err = read_tree_recursive(args->tree, "", 0, 0, args->pathspec, + 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; @@ -205,9 +207,9 @@ static const struct archiver *lookup_archiver(const char *name) if (!name) return NULL; - for (i = 0; i < ARRAY_SIZE(archivers); i++) { - if (!strcmp(name, archivers[i].name)) - return &archivers[i]; + for (i = 0; i < nr_archivers; i++) { + if (!strcmp(name, archivers[i]->name)) + return archivers[i]; } return NULL; } @@ -221,11 +223,14 @@ static int reject_entry(const unsigned char *sha1, const char *base, static int path_exists(struct tree *tree, const char *path) { - const char *pathspec[] = { path, NULL }; - - if (read_tree_recursive(tree, "", 0, 0, pathspec, reject_entry, NULL)) - return 1; - return 0; + 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, @@ -242,7 +247,8 @@ static void parse_pathspec_arg(const char **pathspec, } static void parse_treeish_arg(const char **argv, - struct archiver_args *ar_args, const char *prefix) + struct archiver_args *ar_args, const char *prefix, + int remote) { const char *name = argv[0]; const unsigned char *commit_sha1; @@ -251,6 +257,24 @@ static void parse_treeish_arg(const char **argv, const struct commit *commit; unsigned char sha1[20]; + /* Remotes are only allowed to fetch actual refs */ + if (remote) { + char *ref = NULL; + const char *refname, *colon = NULL; + + colon = strchr(name, ':'); + if (colon) + refname = xstrndup(name, colon - name); + else + refname = name; + + if (!dwim_ref(refname, strlen(refname), sha1, &ref)) + die("no such ref: %s", refname); + if (refname != name) + free((void *)refname); + free(ref); + } + if (get_sha1(name, sha1)) die("Not a valid object name"); @@ -293,9 +317,10 @@ static void parse_treeish_arg(const char **argv, 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 struct archiver **ar, struct archiver_args *args, + const char *name_hint, int is_remote) { - const char *format = "tar"; + const char *format = NULL; const char *base = NULL; const char *remote = NULL; const char *exec = NULL; @@ -312,7 +337,7 @@ static int parse_archive_args(int argc, const char **argv, "prepend prefix to each pathname in the archive"), OPT_STRING('o', "output", &output, "file", "write the archive to this file"), - OPT_BOOLEAN(0, "worktree-attributes", &worktree_attributes, + OPT_BOOL(0, "worktree-attributes", &worktree_attributes, "read .gitattributes in working directory"), OPT__VERBOSE(&verbose, "report archived files on stderr"), OPT__COMPR('0', &compression_level, "store only", 0), @@ -326,7 +351,7 @@ static int parse_archive_args(int argc, const char **argv, OPT__COMPR_HIDDEN('8', &compression_level, 8), OPT__COMPR('9', &compression_level, "compress better", 9), OPT_GROUP(""), - OPT_BOOLEAN('l', "list", &list, + OPT_BOOL('l', "list", &list, "list supported archive formats"), OPT_GROUP(""), OPT_STRING(0, "remote", &remote, "repo", @@ -349,21 +374,27 @@ static int parse_archive_args(int argc, const char **argv, base = ""; if (list) { - for (i = 0; i < ARRAY_SIZE(archivers); i++) - printf("%s\n", archivers[i].name); + 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) + 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 & USES_ZLIB_COMPRESSION) + if ((*ar)->flags & ARCHIVER_WANT_COMPRESSION_LEVELS) args->compression_level = compression_level; else { die("Argument not supported for format '%s': -%d", @@ -379,19 +410,55 @@ static int parse_archive_args(int argc, const char **argv, } int write_archive(int argc, const char **argv, const char *prefix, - int setup_prefix) + int setup_prefix, const char *name_hint, int remote) { + int nongit = 0; const struct archiver *ar = NULL; struct archiver_args args; - argc = parse_archive_args(argc, argv, &ar, &args); if (setup_prefix && prefix == NULL) - prefix = setup_git_directory(); + 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); + parse_treeish_arg(argv, &args, prefix, remote); parse_pathspec_arg(argv + 1, &args); - git_config(git_default_config, NULL); + return ar->write_archive(ar, &args); +} + +static int match_extension(const char *filename, const char *ext) +{ + int prefixlen = strlen(filename) - strlen(ext); - return ar->write_archive(&args); + /* + * 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; } |