mirror of
https://github.com/git/git.git
synced 2024-10-30 13:57:54 +01:00
4fac1d3a98
Convert git archive to parse_options(). The parameters --remote and --exec are still handled by their special parser. Define them anyway in order for them to show up in the usage notice. Note: in a command like "git archive --prefix --remote=a/ HEAD", the string "--remote=a/" will be interpreted as a remote option, not a prefix, because that special parser sees it first. If one needs such a strange prefix, it needs to be specified like this: "git archive --prefix=--remote=a/ HEAD" (with an equal sign). Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
342 lines
8.7 KiB
C
342 lines
8.7 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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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;
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if (src == buf->buf)
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to_free = strbuf_detach(buf, NULL);
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strbuf_init(&fmt, 0);
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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);
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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;
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size_t size = 0;
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strbuf_init(&buf, 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 READ_TREE_RECURSIVE;
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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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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__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 (!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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return ar->write_archive(&args);
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}
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