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#include "cache.h" |
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#include "config.h" |
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#include "refs.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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#include "unpack-trees.h" |
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#include "dir.h" |
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|
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static char const * const archive_usage[] = { |
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N_("git archive [<options>] <tree-ish> [<path>...]"), |
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N_("git archive --list"), |
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N_("git archive --remote <repo> [--exec <cmd>] [<options>] <tree-ish> [<path>...]"), |
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N_("git archive --remote <repo> [--exec <cmd>] --list"), |
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NULL |
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}; |
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|
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static const struct archiver **archivers; |
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static int nr_archivers; |
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static int alloc_archivers; |
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static int remote_allow_unreachable; |
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|
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void register_archiver(struct archiver *ar) |
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{ |
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ALLOC_GROW(archivers, nr_archivers + 1, alloc_archivers); |
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archivers[nr_archivers++] = ar; |
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} |
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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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struct pretty_print_context ctx = {0}; |
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ctx.date_mode.type = DATE_NORMAL; |
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ctx.abbrev = DEFAULT_ABBREV; |
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|
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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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|
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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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|
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strbuf_reset(&fmt); |
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strbuf_add(&fmt, b + 8, c - b - 8); |
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|
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strbuf_add(buf, src, b - src); |
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format_commit_message(commit, fmt.buf, buf, &ctx); |
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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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|
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void *sha1_file_to_archive(const struct archiver_args *args, |
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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) |
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{ |
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void *buffer; |
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const struct commit *commit = args->convert ? args->commit : NULL; |
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|
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path += args->baselen; |
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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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|
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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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|
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return buffer; |
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} |
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|
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struct directory { |
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struct directory *up; |
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struct object_id oid; |
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int baselen, len; |
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unsigned mode; |
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int stage; |
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char path[FLEX_ARRAY]; |
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}; |
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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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struct directory *bottom; |
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}; |
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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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static struct attr_check *check; |
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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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const char *path_without_prefix; |
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int err; |
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|
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args->convert = 0; |
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strbuf_reset(&path); |
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strbuf_grow(&path, PATH_MAX); |
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strbuf_add(&path, args->base, args->baselen); |
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strbuf_add(&path, base, baselen); |
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strbuf_addstr(&path, filename); |
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if (S_ISDIR(mode) || S_ISGITLINK(mode)) |
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strbuf_addch(&path, '/'); |
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path_without_prefix = path.buf + args->baselen; |
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|
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if (!check) |
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check = attr_check_initl("export-ignore", "export-subst", NULL); |
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if (!git_check_attr(path_without_prefix, check)) { |
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if (ATTR_TRUE(check->items[0].value)) |
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return 0; |
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args->convert = ATTR_TRUE(check->items[1].value); |
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} |
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|
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if (S_ISDIR(mode) || S_ISGITLINK(mode)) { |
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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); |
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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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|
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if (args->verbose) |
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fprintf(stderr, "%.*s\n", (int)path.len, path.buf); |
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return write_entry(args, sha1, path.buf, path.len, mode); |
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} |
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|
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static int write_archive_entry_buf(const unsigned char *sha1, struct strbuf *base, |
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const char *filename, unsigned mode, int stage, |
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void *context) |
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{ |
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return write_archive_entry(sha1, base->buf, base->len, |
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filename, mode, stage, context); |
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} |
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|
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static void queue_directory(const unsigned char *sha1, |
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struct strbuf *base, const char *filename, |
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unsigned mode, int stage, struct archiver_context *c) |
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{ |
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struct directory *d; |
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size_t len = st_add4(base->len, 1, strlen(filename), 1); |
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d = xmalloc(st_add(sizeof(*d), len)); |
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d->up = c->bottom; |
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d->baselen = base->len; |
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d->mode = mode; |
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d->stage = stage; |
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c->bottom = d; |
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d->len = xsnprintf(d->path, len, "%.*s%s/", (int)base->len, base->buf, filename); |
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hashcpy(d->oid.hash, sha1); |
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} |
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|
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static int write_directory(struct archiver_context *c) |
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{ |
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struct directory *d = c->bottom; |
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int ret; |
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|
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if (!d) |
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return 0; |
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c->bottom = d->up; |
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d->path[d->len - 1] = '\0'; /* no trailing slash */ |
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ret = |
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write_directory(c) || |
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write_archive_entry(d->oid.hash, d->path, d->baselen, |
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d->path + d->baselen, d->mode, |
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d->stage, c) != READ_TREE_RECURSIVE; |
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free(d); |
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return ret ? -1 : 0; |
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} |
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|
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static int queue_or_write_archive_entry(const unsigned char *sha1, |
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struct strbuf *base, const char *filename, |
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unsigned mode, int stage, void *context) |
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{ |
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struct archiver_context *c = context; |
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|
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while (c->bottom && |
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!(base->len >= c->bottom->len && |
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!strncmp(base->buf, c->bottom->path, c->bottom->len))) { |
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struct directory *next = c->bottom->up; |
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free(c->bottom); |
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c->bottom = next; |
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} |
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|
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if (S_ISDIR(mode)) { |
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queue_directory(sha1, base, filename, |
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mode, stage, c); |
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return READ_TREE_RECURSIVE; |
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} |
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|
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if (write_directory(c)) |
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return -1; |
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return write_archive_entry(sha1, base->buf, base->len, filename, mode, |
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stage, context); |
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} |
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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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struct unpack_trees_options opts; |
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struct tree_desc t; |
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int err; |
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|
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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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|
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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.oid.hash, args->base, |
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len, 040777); |
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if (err) |
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return err; |
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} |
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|
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memset(&context, 0, sizeof(context)); |
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context.args = args; |
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context.write_entry = write_entry; |
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|
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/* |
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* Setup index and instruct attr to read index only |
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*/ |
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if (!args->worktree_attributes) { |
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memset(&opts, 0, sizeof(opts)); |
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opts.index_only = 1; |
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opts.head_idx = -1; |
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opts.src_index = &the_index; |
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opts.dst_index = &the_index; |
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opts.fn = oneway_merge; |
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init_tree_desc(&t, args->tree->buffer, args->tree->size); |
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if (unpack_trees(1, &t, &opts)) |
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return -1; |
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git_attr_set_direction(GIT_ATTR_INDEX, &the_index); |
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} |
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|
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err = read_tree_recursive(args->tree, "", 0, 0, &args->pathspec, |
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args->pathspec.has_wildcard ? |
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queue_or_write_archive_entry : |
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write_archive_entry_buf, |
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&context); |
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if (err == READ_TREE_RECURSIVE) |
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err = 0; |
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while (context.bottom) { |
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struct directory *next = context.bottom->up; |
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free(context.bottom); |
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context.bottom = next; |
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} |
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return err; |
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} |
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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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|
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if (!name) |
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return NULL; |
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|
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for (i = 0; i < nr_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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|
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static int reject_entry(const unsigned char *sha1, struct strbuf *base, |
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const char *filename, unsigned mode, |
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int stage, void *context) |
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{ |
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int ret = -1; |
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if (S_ISDIR(mode)) { |
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struct strbuf sb = STRBUF_INIT; |
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strbuf_addbuf(&sb, base); |
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strbuf_addstr(&sb, filename); |
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if (!match_pathspec(context, sb.buf, sb.len, 0, NULL, 1)) |
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ret = READ_TREE_RECURSIVE; |
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strbuf_release(&sb); |
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} |
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return ret; |
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} |
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|
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static int path_exists(struct tree *tree, const char *path) |
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{ |
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const char *paths[] = { path, NULL }; |
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struct pathspec pathspec; |
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int ret; |
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|
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parse_pathspec(&pathspec, 0, 0, "", paths); |
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pathspec.recursive = 1; |
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ret = read_tree_recursive(tree, "", 0, 0, &pathspec, |
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reject_entry, &pathspec); |
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clear_pathspec(&pathspec); |
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return ret != 0; |
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} |
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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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/* |
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* must be consistent with parse_pathspec in path_exists() |
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* Also if pathspec patterns are dependent, we're in big |
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* trouble as we test each one separately |
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*/ |
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parse_pathspec(&ar_args->pathspec, 0, |
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PATHSPEC_PREFER_FULL, |
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"", pathspec); |
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ar_args->pathspec.recursive = 1; |
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if (pathspec) { |
|
while (*pathspec) { |
|
if (**pathspec && !path_exists(ar_args->tree, *pathspec)) |
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die(_("pathspec '%s' did not match any files"), *pathspec); |
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pathspec++; |
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} |
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} |
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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, |
|
int remote) |
|
{ |
|
const char *name = argv[0]; |
|
const unsigned char *commit_sha1; |
|
time_t archive_time; |
|
struct tree *tree; |
|
const struct commit *commit; |
|
struct object_id oid; |
|
|
|
/* Remotes are only allowed to fetch actual refs */ |
|
if (remote && !remote_allow_unreachable) { |
|
char *ref = NULL; |
|
const char *colon = strchrnul(name, ':'); |
|
int refnamelen = colon - name; |
|
|
|
if (!dwim_ref(name, refnamelen, oid.hash, &ref)) |
|
die("no such ref: %.*s", refnamelen, name); |
|
free(ref); |
|
} |
|
|
|
if (get_sha1(name, oid.hash)) |
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die("Not a valid object name"); |
|
|
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commit = lookup_commit_reference_gently(&oid, 1); |
|
if (commit) { |
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commit_sha1 = commit->object.oid.hash; |
|
archive_time = commit->date; |
|
} else { |
|
commit_sha1 = NULL; |
|
archive_time = time(NULL); |
|
} |
|
|
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tree = parse_tree_indirect(&oid); |
|
if (tree == NULL) |
|
die("not a tree object"); |
|
|
|
if (prefix) { |
|
struct object_id tree_oid; |
|
unsigned int mode; |
|
int err; |
|
|
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err = get_tree_entry(tree->object.oid.hash, prefix, |
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tree_oid.hash, &mode); |
|
if (err || !S_ISDIR(mode)) |
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die("current working directory is untracked"); |
|
|
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tree = parse_tree_indirect(&tree_oid); |
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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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#define OPT__COMPR(s, v, h, p) \ |
|
{ 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) \ |
|
{ 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, |
|
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")), |
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OPT__VERBOSE(&verbose, N_("report archived files on stderr")), |
|
OPT__COMPR('0', &compression_level, N_("store only"), 0), |
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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() |
|
}; |
|
|
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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, |
|
const char *name_hint, int remote) |
|
{ |
|
const struct archiver *ar = NULL; |
|
struct archiver_args args; |
|
|
|
git_config_get_bool("uploadarchive.allowunreachable", &remote_allow_unreachable); |
|
git_config(git_default_config, NULL); |
|
|
|
init_tar_archiver(); |
|
init_zip_archiver(); |
|
|
|
argc = parse_archive_args(argc, argv, &ar, &args, name_hint, remote); |
|
if (!startup_info->have_repository) { |
|
/* |
|
* 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; |
|
} |
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