From 3d74982f0b1f8895d27937aa6ed62c1ddd50a020 Mon Sep 17 00:00:00 2001 From: Rene Scharfe Date: Sun, 24 Sep 2006 17:31:10 +0200 Subject: git-tar-tree: Move code for git-archive --format=tar to archive-tar.c This patch doesn't change any functionality, it only moves code around. It makes seeing the few remaining lines of git-tar-tree code easier. ;-) Signed-off-by: Rene Scharfe Signed-off-by: Junio C Hamano --- builtin-tar-tree.c | 313 ----------------------------------------------------- 1 file changed, 313 deletions(-) (limited to 'builtin-tar-tree.c') diff --git a/builtin-tar-tree.c b/builtin-tar-tree.c index 82b4951f3a..aa370e3ecd 100644 --- a/builtin-tar-tree.c +++ b/builtin-tar-tree.c @@ -4,7 +4,6 @@ #include #include "cache.h" #include "commit.h" -#include "strbuf.h" #include "tar.h" #include "builtin.h" #include "pkt-line.h" @@ -16,251 +15,6 @@ static const char tar_tree_usage[] = "git-tar-tree [--remote=] [basedir]"; -static char block[BLOCKSIZE]; -static unsigned long offset; - -static time_t archive_time; -static int tar_umask; -static int verbose; - -/* writes out the whole block, but only if it is full */ -static void write_if_needed(void) -{ - if (offset == BLOCKSIZE) { - write_or_die(1, block, BLOCKSIZE); - offset = 0; - } -} - -/* - * queues up writes, so that all our write(2) calls write exactly one - * full block; pads writes to RECORDSIZE - */ -static void write_blocked(const void *data, unsigned long size) -{ - const char *buf = data; - unsigned long tail; - - if (offset) { - unsigned long chunk = BLOCKSIZE - offset; - if (size < chunk) - chunk = size; - memcpy(block + offset, buf, chunk); - size -= chunk; - offset += chunk; - buf += chunk; - write_if_needed(); - } - while (size >= BLOCKSIZE) { - write_or_die(1, buf, BLOCKSIZE); - size -= BLOCKSIZE; - buf += BLOCKSIZE; - } - if (size) { - memcpy(block + offset, buf, size); - offset += size; - } - tail = offset % RECORDSIZE; - if (tail) { - memset(block + offset, 0, RECORDSIZE - tail); - offset += RECORDSIZE - tail; - } - write_if_needed(); -} - -/* - * The end of tar archives is marked by 2*512 nul bytes and after that - * follows the rest of the block (if any). - */ -static void write_trailer(void) -{ - int tail = BLOCKSIZE - offset; - memset(block + offset, 0, tail); - write_or_die(1, block, BLOCKSIZE); - if (tail < 2 * RECORDSIZE) { - memset(block, 0, offset); - write_or_die(1, block, BLOCKSIZE); - } -} - -static void strbuf_append_string(struct strbuf *sb, const char *s) -{ - int slen = strlen(s); - int total = sb->len + slen; - if (total > sb->alloc) { - sb->buf = xrealloc(sb->buf, total); - sb->alloc = total; - } - memcpy(sb->buf + sb->len, s, slen); - sb->len = total; -} - -/* - * pax extended header records have the format "%u %s=%s\n". %u contains - * the size of the whole string (including the %u), the first %s is the - * keyword, the second one is the value. This function constructs such a - * string and appends it to a struct strbuf. - */ -static void strbuf_append_ext_header(struct strbuf *sb, const char *keyword, - const char *value, unsigned int valuelen) -{ - char *p; - int len, total, tmp; - - /* "%u %s=%s\n" */ - len = 1 + 1 + strlen(keyword) + 1 + valuelen + 1; - for (tmp = len; tmp > 9; tmp /= 10) - len++; - - total = sb->len + len; - if (total > sb->alloc) { - sb->buf = xrealloc(sb->buf, total); - sb->alloc = total; - } - - p = sb->buf; - p += sprintf(p, "%u %s=", len, keyword); - memcpy(p, value, valuelen); - p += valuelen; - *p = '\n'; - sb->len = total; -} - -static unsigned int ustar_header_chksum(const struct ustar_header *header) -{ - char *p = (char *)header; - unsigned int chksum = 0; - while (p < header->chksum) - chksum += *p++; - chksum += sizeof(header->chksum) * ' '; - p += sizeof(header->chksum); - while (p < (char *)header + sizeof(struct ustar_header)) - chksum += *p++; - return chksum; -} - -static int get_path_prefix(const struct strbuf *path, int maxlen) -{ - int i = path->len; - if (i > maxlen) - i = maxlen; - do { - i--; - } while (i > 0 && path->buf[i] != '/'); - return i; -} - -static void write_entry(const unsigned char *sha1, struct strbuf *path, - unsigned int mode, void *buffer, unsigned long size) -{ - struct ustar_header header; - struct strbuf ext_header; - - memset(&header, 0, sizeof(header)); - ext_header.buf = NULL; - ext_header.len = ext_header.alloc = 0; - - if (!sha1) { - *header.typeflag = TYPEFLAG_GLOBAL_HEADER; - mode = 0100666; - strcpy(header.name, "pax_global_header"); - } else if (!path) { - *header.typeflag = TYPEFLAG_EXT_HEADER; - mode = 0100666; - sprintf(header.name, "%s.paxheader", sha1_to_hex(sha1)); - } else { - if (verbose) - fprintf(stderr, "%.*s\n", path->len, path->buf); - if (S_ISDIR(mode)) { - *header.typeflag = TYPEFLAG_DIR; - mode = (mode | 0777) & ~tar_umask; - } else if (S_ISLNK(mode)) { - *header.typeflag = TYPEFLAG_LNK; - mode |= 0777; - } else if (S_ISREG(mode)) { - *header.typeflag = TYPEFLAG_REG; - mode = (mode | ((mode & 0100) ? 0777 : 0666)) & ~tar_umask; - } else { - error("unsupported file mode: 0%o (SHA1: %s)", - mode, sha1_to_hex(sha1)); - return; - } - if (path->len > sizeof(header.name)) { - int plen = get_path_prefix(path, sizeof(header.prefix)); - int rest = path->len - plen - 1; - if (plen > 0 && rest <= sizeof(header.name)) { - memcpy(header.prefix, path->buf, plen); - memcpy(header.name, path->buf + plen + 1, rest); - } else { - sprintf(header.name, "%s.data", - sha1_to_hex(sha1)); - strbuf_append_ext_header(&ext_header, "path", - path->buf, path->len); - } - } else - memcpy(header.name, path->buf, path->len); - } - - if (S_ISLNK(mode) && buffer) { - if (size > sizeof(header.linkname)) { - sprintf(header.linkname, "see %s.paxheader", - sha1_to_hex(sha1)); - strbuf_append_ext_header(&ext_header, "linkpath", - buffer, size); - } else - memcpy(header.linkname, buffer, size); - } - - sprintf(header.mode, "%07o", mode & 07777); - sprintf(header.size, "%011lo", S_ISREG(mode) ? size : 0); - sprintf(header.mtime, "%011lo", archive_time); - - /* XXX: should we provide more meaningful info here? */ - sprintf(header.uid, "%07o", 0); - sprintf(header.gid, "%07o", 0); - strlcpy(header.uname, "git", sizeof(header.uname)); - strlcpy(header.gname, "git", sizeof(header.gname)); - sprintf(header.devmajor, "%07o", 0); - sprintf(header.devminor, "%07o", 0); - - memcpy(header.magic, "ustar", 6); - memcpy(header.version, "00", 2); - - sprintf(header.chksum, "%07o", ustar_header_chksum(&header)); - - if (ext_header.len > 0) { - write_entry(sha1, NULL, 0, ext_header.buf, ext_header.len); - free(ext_header.buf); - } - write_blocked(&header, sizeof(header)); - if (S_ISREG(mode) && buffer && size > 0) - write_blocked(buffer, size); -} - -static void write_global_extended_header(const unsigned char *sha1) -{ - struct strbuf ext_header; - ext_header.buf = NULL; - ext_header.len = ext_header.alloc = 0; - strbuf_append_ext_header(&ext_header, "comment", sha1_to_hex(sha1), 40); - write_entry(NULL, NULL, 0, ext_header.buf, ext_header.len); - free(ext_header.buf); -} - -static int git_tar_config(const char *var, const char *value) -{ - if (!strcmp(var, "tar.umask")) { - if (!strcmp(value, "user")) { - tar_umask = umask(0); - umask(tar_umask); - } else { - tar_umask = git_config_int(var, value); - } - return 0; - } - return git_default_config(var, value); -} - static int generate_tar(int argc, const char **argv, const char *prefix) { struct archiver_args args; @@ -286,73 +40,6 @@ static int generate_tar(int argc, const char **argv, const char *prefix) return result; } -static int write_tar_entry(const unsigned char *sha1, - const char *base, int baselen, - const char *filename, unsigned mode, int stage) -{ - static struct strbuf path; - int filenamelen = strlen(filename); - void *buffer; - char type[20]; - unsigned long size; - - if (!path.alloc) { - path.buf = xmalloc(PATH_MAX); - path.alloc = PATH_MAX; - path.len = path.eof = 0; - } - if (path.alloc < baselen + filenamelen) { - free(path.buf); - path.buf = xmalloc(baselen + filenamelen); - path.alloc = baselen + filenamelen; - } - memcpy(path.buf, base, baselen); - memcpy(path.buf + baselen, filename, filenamelen); - path.len = baselen + filenamelen; - if (S_ISDIR(mode)) { - strbuf_append_string(&path, "/"); - buffer = NULL; - size = 0; - } else { - buffer = read_sha1_file(sha1, type, &size); - if (!buffer) - die("cannot read %s", sha1_to_hex(sha1)); - } - - write_entry(sha1, &path, mode, buffer, size); - free(buffer); - - return READ_TREE_RECURSIVE; -} - -int write_tar_archive(struct archiver_args *args) -{ - int plen = args->base ? strlen(args->base) : 0; - - git_config(git_tar_config); - - archive_time = args->time; - verbose = args->verbose; - - if (args->commit_sha1) - write_global_extended_header(args->commit_sha1); - - if (args->base && plen > 0 && args->base[plen - 1] == '/') { - char *base = xstrdup(args->base); - int baselen = strlen(base); - - while (baselen > 0 && base[baselen - 1] == '/') - base[--baselen] = '\0'; - write_tar_entry(args->tree->object.sha1, "", 0, base, 040777, 0); - free(base); - } - read_tree_recursive(args->tree, args->base, plen, 0, - args->pathspec, write_tar_entry); - write_trailer(); - - return 0; -} - static const char *exec = "git-upload-tar"; static int remote_tar(int argc, const char **argv) -- cgit v1.2.3