#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;
+ 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);
- strbuf_init(&fmt, 0);
for (;;) {
const char *b, *c;
strbuf_add(&fmt, b + 8, c - b - 8);
strbuf_add(buf, src, b - src);
- format_commit_message(commit, fmt.buf, buf);
+ format_commit_message(commit, fmt.buf, buf, &ctx);
len -= c + 1 - src;
src = c + 1;
}
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 *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;
+ struct strbuf buf = STRBUF_INIT;
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);
+ 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;
+}