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https://github.com/git/git.git
synced 2024-11-18 23:14:51 +01:00
52e7787609
Replace the hand-rolled parsers that find and remove --remote and --exec by a parseopt parser that also handles --output. All three options only have a meaning if no remote server is used or on the local side. They must be rejected by upload-archive and should not be sent to the server by archive. We can't use a single parser for both remote and local side because the remote end possibly understands a different set of options than the local side. A local parser would then wrongly accuse options valid on the other side as being incorrect. This patch implements a very forgiving parser that understands only the three options mentioned above. All others are passed to the normal, complete parser in archive.c (running either locally in archive, or remotely in upload-archive). This normal parser definition contains dummy entries for the three options, in order for them to appear in the help screen. The parseopt parser allows multiple occurrences of --remote and --exec unlike the previous one; the one specified last wins. This looseness is acceptable, I think. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
347 lines
8.9 KiB
C
347 lines
8.9 KiB
C
#include "cache.h"
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#include "commit.h"
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#include "tree-walk.h"
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#include "attr.h"
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#include "archive.h"
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#include "parse-options.h"
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static char const * const archive_usage[] = {
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"git archive [options] <tree-ish> [path...]",
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"git archive --list",
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"git archive --remote <repo> [--exec <cmd>] [options] <tree-ish> [path...]",
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"git archive --remote <repo> [--exec <cmd>] --list",
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NULL
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};
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#define USES_ZLIB_COMPRESSION 1
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static const struct archiver {
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const char *name;
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write_archive_fn_t write_archive;
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unsigned int flags;
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} archivers[] = {
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{ "tar", write_tar_archive },
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{ "zip", write_zip_archive, USES_ZLIB_COMPRESSION },
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};
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static void format_subst(const struct commit *commit,
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const char *src, size_t len,
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struct strbuf *buf)
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{
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char *to_free = NULL;
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struct strbuf fmt = STRBUF_INIT;
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if (src == buf->buf)
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to_free = strbuf_detach(buf, NULL);
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for (;;) {
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const char *b, *c;
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b = memmem(src, len, "$Format:", 8);
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if (!b)
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break;
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c = memchr(b + 8, '$', (src + len) - b - 8);
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if (!c)
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break;
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strbuf_reset(&fmt);
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strbuf_add(&fmt, b + 8, c - b - 8);
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strbuf_add(buf, src, b - src);
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format_commit_message(commit, fmt.buf, buf, DATE_NORMAL);
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len -= c + 1 - src;
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src = c + 1;
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}
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strbuf_add(buf, src, len);
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strbuf_release(&fmt);
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free(to_free);
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}
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static void *sha1_file_to_archive(const char *path, const unsigned char *sha1,
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unsigned int mode, enum object_type *type,
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unsigned long *sizep, const struct commit *commit)
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{
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void *buffer;
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buffer = read_sha1_file(sha1, type, sizep);
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if (buffer && S_ISREG(mode)) {
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struct strbuf buf = STRBUF_INIT;
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size_t size = 0;
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strbuf_attach(&buf, buffer, *sizep, *sizep + 1);
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convert_to_working_tree(path, buf.buf, buf.len, &buf);
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if (commit)
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format_subst(commit, buf.buf, buf.len, &buf);
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buffer = strbuf_detach(&buf, &size);
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*sizep = size;
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}
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return buffer;
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}
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static void setup_archive_check(struct git_attr_check *check)
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{
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static struct git_attr *attr_export_ignore;
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static struct git_attr *attr_export_subst;
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if (!attr_export_ignore) {
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attr_export_ignore = git_attr("export-ignore", 13);
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attr_export_subst = git_attr("export-subst", 12);
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}
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check[0].attr = attr_export_ignore;
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check[1].attr = attr_export_subst;
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}
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struct archiver_context {
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struct archiver_args *args;
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write_archive_entry_fn_t write_entry;
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};
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static int write_archive_entry(const unsigned char *sha1, const char *base,
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int baselen, const char *filename, unsigned mode, int stage,
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void *context)
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{
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static struct strbuf path = STRBUF_INIT;
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struct archiver_context *c = context;
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struct archiver_args *args = c->args;
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write_archive_entry_fn_t write_entry = c->write_entry;
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struct git_attr_check check[2];
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const char *path_without_prefix;
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int convert = 0;
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int err;
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enum object_type type;
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unsigned long size;
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void *buffer;
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strbuf_reset(&path);
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strbuf_grow(&path, PATH_MAX);
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strbuf_add(&path, base, baselen);
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strbuf_addstr(&path, filename);
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path_without_prefix = path.buf + args->baselen;
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setup_archive_check(check);
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if (!git_checkattr(path_without_prefix, ARRAY_SIZE(check), check)) {
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if (ATTR_TRUE(check[0].value))
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return 0;
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convert = ATTR_TRUE(check[1].value);
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}
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if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
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strbuf_addch(&path, '/');
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if (args->verbose)
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fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
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err = write_entry(args, sha1, path.buf, path.len, mode, NULL, 0);
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if (err)
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return err;
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return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0);
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}
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buffer = sha1_file_to_archive(path_without_prefix, sha1, mode,
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&type, &size, convert ? args->commit : NULL);
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if (!buffer)
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return error("cannot read %s", sha1_to_hex(sha1));
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if (args->verbose)
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fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
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err = write_entry(args, sha1, path.buf, path.len, mode, buffer, size);
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free(buffer);
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return err;
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}
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int write_archive_entries(struct archiver_args *args,
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write_archive_entry_fn_t write_entry)
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{
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struct archiver_context context;
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int err;
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if (args->baselen > 0 && args->base[args->baselen - 1] == '/') {
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size_t len = args->baselen;
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while (len > 1 && args->base[len - 2] == '/')
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len--;
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if (args->verbose)
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fprintf(stderr, "%.*s\n", (int)len, args->base);
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err = write_entry(args, args->tree->object.sha1, args->base,
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len, 040777, NULL, 0);
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if (err)
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return err;
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}
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context.args = args;
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context.write_entry = write_entry;
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err = read_tree_recursive(args->tree, args->base, args->baselen, 0,
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args->pathspec, write_archive_entry, &context);
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if (err == READ_TREE_RECURSIVE)
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err = 0;
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return err;
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}
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static const struct archiver *lookup_archiver(const char *name)
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{
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int i;
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if (!name)
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return NULL;
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for (i = 0; i < ARRAY_SIZE(archivers); i++) {
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if (!strcmp(name, archivers[i].name))
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return &archivers[i];
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}
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return NULL;
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}
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static void parse_pathspec_arg(const char **pathspec,
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struct archiver_args *ar_args)
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{
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ar_args->pathspec = get_pathspec(ar_args->base, pathspec);
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}
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static void parse_treeish_arg(const char **argv,
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struct archiver_args *ar_args, const char *prefix)
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{
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const char *name = argv[0];
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const unsigned char *commit_sha1;
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time_t archive_time;
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struct tree *tree;
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const struct commit *commit;
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unsigned char sha1[20];
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if (get_sha1(name, sha1))
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die("Not a valid object name");
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commit = lookup_commit_reference_gently(sha1, 1);
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if (commit) {
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commit_sha1 = commit->object.sha1;
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archive_time = commit->date;
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} else {
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commit_sha1 = NULL;
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archive_time = time(NULL);
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}
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tree = parse_tree_indirect(sha1);
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if (tree == NULL)
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die("not a tree object");
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if (prefix) {
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unsigned char tree_sha1[20];
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unsigned int mode;
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int err;
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err = get_tree_entry(tree->object.sha1, prefix,
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tree_sha1, &mode);
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if (err || !S_ISDIR(mode))
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die("current working directory is untracked");
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tree = parse_tree_indirect(tree_sha1);
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}
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ar_args->tree = tree;
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ar_args->commit_sha1 = commit_sha1;
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ar_args->commit = commit;
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ar_args->time = archive_time;
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}
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#define OPT__COMPR(s, v, h, p) \
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{ OPTION_SET_INT, (s), NULL, (v), NULL, (h), \
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PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, (p) }
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#define OPT__COMPR_HIDDEN(s, v, p) \
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{ OPTION_SET_INT, (s), NULL, (v), NULL, "", \
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PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_HIDDEN, NULL, (p) }
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static int parse_archive_args(int argc, const char **argv,
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const struct archiver **ar, struct archiver_args *args)
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{
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const char *format = "tar";
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const char *base = NULL;
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const char *remote = NULL;
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const char *exec = NULL;
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const char *output = NULL;
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int compression_level = -1;
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int verbose = 0;
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int i;
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int list = 0;
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struct option opts[] = {
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OPT_GROUP(""),
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OPT_STRING(0, "format", &format, "fmt", "archive format"),
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OPT_STRING(0, "prefix", &base, "prefix",
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"prepend prefix to each pathname in the archive"),
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OPT_STRING(0, "output", &output, "file",
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"write the archive to this file"),
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OPT__VERBOSE(&verbose),
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OPT__COMPR('0', &compression_level, "store only", 0),
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OPT__COMPR('1', &compression_level, "compress faster", 1),
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OPT__COMPR_HIDDEN('2', &compression_level, 2),
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OPT__COMPR_HIDDEN('3', &compression_level, 3),
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OPT__COMPR_HIDDEN('4', &compression_level, 4),
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OPT__COMPR_HIDDEN('5', &compression_level, 5),
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OPT__COMPR_HIDDEN('6', &compression_level, 6),
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OPT__COMPR_HIDDEN('7', &compression_level, 7),
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OPT__COMPR_HIDDEN('8', &compression_level, 8),
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OPT__COMPR('9', &compression_level, "compress better", 9),
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OPT_GROUP(""),
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OPT_BOOLEAN('l', "list", &list,
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"list supported archive formats"),
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OPT_GROUP(""),
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OPT_STRING(0, "remote", &remote, "repo",
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"retrieve the archive from remote repository <repo>"),
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OPT_STRING(0, "exec", &exec, "cmd",
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"path to the remote git-upload-archive command"),
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OPT_END()
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};
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argc = parse_options(argc, argv, opts, archive_usage, 0);
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if (remote)
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die("Unexpected option --remote");
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if (exec)
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die("Option --exec can only be used together with --remote");
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if (output)
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die("Unexpected option --output");
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if (!base)
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base = "";
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if (list) {
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for (i = 0; i < ARRAY_SIZE(archivers); i++)
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printf("%s\n", archivers[i].name);
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exit(0);
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}
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/* We need at least one parameter -- tree-ish */
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if (argc < 1)
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usage_with_options(archive_usage, opts);
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*ar = lookup_archiver(format);
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if (!*ar)
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die("Unknown archive format '%s'", format);
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args->compression_level = Z_DEFAULT_COMPRESSION;
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if (compression_level != -1) {
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if ((*ar)->flags & USES_ZLIB_COMPRESSION)
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args->compression_level = compression_level;
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else {
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die("Argument not supported for format '%s': -%d",
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format, compression_level);
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}
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}
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args->verbose = verbose;
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args->base = base;
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args->baselen = strlen(base);
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return argc;
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}
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int write_archive(int argc, const char **argv, const char *prefix,
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int setup_prefix)
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{
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const struct archiver *ar = NULL;
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struct archiver_args args;
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argc = parse_archive_args(argc, argv, &ar, &args);
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if (setup_prefix && prefix == NULL)
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prefix = setup_git_directory();
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parse_treeish_arg(argv, &args, prefix);
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parse_pathspec_arg(argv + 1, &args);
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git_config(git_default_config, NULL);
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return ar->write_archive(&args);
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}
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