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![Nguyễn Thái Ngọc Duy](/assets/img/avatar_default.png)
The only thing these commands need is extra parseopt flag which can be passed in by OPT_SET_INT_F() and it is a bit more compact than full struct initialization. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
562 lines
15 KiB
C
562 lines
15 KiB
C
#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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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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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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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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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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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, &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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void *object_file_to_archive(const struct archiver_args *args,
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const char *path, const struct object_id *oid,
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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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path += args->baselen;
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buffer = read_object_file(oid, 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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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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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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static const struct attr_check *get_archive_attrs(const char *path)
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{
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static struct attr_check *check;
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if (!check)
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check = attr_check_initl("export-ignore", "export-subst", NULL);
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return git_check_attr(path, check) ? NULL : check;
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}
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static int check_attr_export_ignore(const struct attr_check *check)
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{
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return check && ATTR_TRUE(check->items[0].value);
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}
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static int check_attr_export_subst(const struct attr_check *check)
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{
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return check && ATTR_TRUE(check->items[1].value);
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}
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static int write_archive_entry(const struct object_id *oid, 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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int err;
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const char *path_without_prefix;
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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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if (!S_ISDIR(mode)) {
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const struct attr_check *check;
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check = get_archive_attrs(path_without_prefix);
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if (check_attr_export_ignore(check))
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return 0;
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args->convert = check_attr_export_subst(check);
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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, oid, 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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if (args->verbose)
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fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
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return write_entry(args, oid, path.buf, path.len, mode);
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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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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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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, 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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static int queue_or_write_archive_entry(const struct object_id *oid,
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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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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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if (S_ISDIR(mode)) {
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size_t baselen = base->len;
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const struct attr_check *check;
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/* Borrow base, but restore its original value when done. */
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strbuf_addstr(base, filename);
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strbuf_addch(base, '/');
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check = get_archive_attrs(base->buf);
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strbuf_setlen(base, baselen);
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if (check_attr_export_ignore(check))
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return 0;
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queue_directory(oid->hash, 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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if (write_directory(c))
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return -1;
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return write_archive_entry(oid, base->buf, base->len, filename, mode,
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stage, context);
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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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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.oid, 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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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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* 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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err = read_tree_recursive(args->tree, "", 0, 0, &args->pathspec,
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queue_or_write_archive_entry,
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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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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 < 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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static int reject_entry(const struct object_id *oid, 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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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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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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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) {
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while (*pathspec) {
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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,
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int remote)
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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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struct object_id oid;
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/* Remotes are only allowed to fetch actual refs */
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if (remote && !remote_allow_unreachable) {
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char *ref = NULL;
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const char *colon = strchrnul(name, ':');
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int refnamelen = colon - name;
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if (!dwim_ref(name, refnamelen, &oid, &ref))
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die("no such ref: %.*s", refnamelen, name);
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free(ref);
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}
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if (get_oid(name, &oid))
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die("Not a valid object name");
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commit = lookup_commit_reference_gently(&oid, 1);
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if (commit) {
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commit_sha1 = commit->object.oid.hash;
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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(&oid);
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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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struct object_id tree_oid;
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unsigned int mode;
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int err;
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err = get_tree_entry(&tree->object.oid, prefix, &tree_oid,
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&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_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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}
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#define OPT__COMPR(s, v, h, p) \
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OPT_SET_INT_F(s, NULL, v, h, p, PARSE_OPT_NONEG)
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#define OPT__COMPR_HIDDEN(s, v, p) \
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OPT_SET_INT_F(s, NULL, v, "", p, PARSE_OPT_NONEG | PARSE_OPT_HIDDEN)
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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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const char *name_hint, int is_remote)
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{
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const char *format = NULL;
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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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int worktree_attributes = 0;
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struct option opts[] = {
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OPT_GROUP(""),
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OPT_STRING(0, "format", &format, N_("fmt"), N_("archive format")),
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OPT_STRING(0, "prefix", &base, N_("prefix"),
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N_("prepend prefix to each pathname in the archive")),
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OPT_STRING('o', "output", &output, N_("file"),
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N_("write the archive to this file")),
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OPT_BOOL(0, "worktree-attributes", &worktree_attributes,
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N_("read .gitattributes in working directory")),
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OPT__VERBOSE(&verbose, N_("report archived files on stderr")),
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OPT__COMPR('0', &compression_level, N_("store only"), 0),
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OPT__COMPR('1', &compression_level, N_("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, N_("compress better"), 9),
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OPT_GROUP(""),
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OPT_BOOL('l', "list", &list,
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N_("list supported archive formats")),
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OPT_GROUP(""),
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OPT_STRING(0, "remote", &remote, N_("repo"),
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N_("retrieve the archive from remote repository <repo>")),
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OPT_STRING(0, "exec", &exec, N_("command"),
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N_("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, NULL, 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 < nr_archivers; i++)
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if (!is_remote || archivers[i]->flags & ARCHIVER_REMOTE)
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printf("%s\n", archivers[i]->name);
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exit(0);
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}
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if (!format && name_hint)
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format = archive_format_from_filename(name_hint);
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if (!format)
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format = "tar";
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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 || (is_remote && !((*ar)->flags & ARCHIVER_REMOTE)))
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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 & ARCHIVER_WANT_COMPRESSION_LEVELS)
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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"),
|
|
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;
|
|
}
|