diff options
Diffstat (limited to 'archive-tar.c')
-rw-r--r-- | archive-tar.c | 244 |
1 files changed, 163 insertions, 81 deletions
diff --git a/archive-tar.c b/archive-tar.c index d7598f907d..20af0051a3 100644 --- a/archive-tar.c +++ b/archive-tar.c @@ -2,10 +2,9 @@ * Copyright (c) 2005, 2006 Rene Scharfe */ #include "cache.h" -#include "commit.h" #include "tar.h" -#include "builtin.h" #include "archive.h" +#include "run-command.h" #define RECORDSIZE (512) #define BLOCKSIZE (RECORDSIZE * 20) @@ -13,11 +12,10 @@ static char block[BLOCKSIZE]; static unsigned long offset; -static time_t archive_time; static int tar_umask = 002; -static int verbose; -static const struct commit *commit; -static size_t base_len; + +static int write_tar_filter_archive(const struct archiver *ar, + struct archiver_args *args); /* writes out the whole block, but only if it is full */ static void write_if_needed(void) @@ -114,25 +112,26 @@ static unsigned int ustar_header_chksum(const struct ustar_header *header) return chksum; } -static int get_path_prefix(const struct strbuf *path, int maxlen) +static size_t get_path_prefix(const char *path, size_t pathlen, size_t maxlen) { - int i = path->len; + size_t i = pathlen; if (i > maxlen) i = maxlen; do { i--; - } while (i > 0 && path->buf[i] != '/'); + } while (i > 0 && path[i] != '/'); return i; } -static void write_entry(const unsigned char *sha1, struct strbuf *path, - unsigned int mode, void *buffer, unsigned long size) +static int write_tar_entry(struct archiver_args *args, + const unsigned char *sha1, const char *path, size_t pathlen, + unsigned int mode, void *buffer, unsigned long size) { struct ustar_header header; - struct strbuf ext_header; + struct strbuf ext_header = STRBUF_INIT; + int err = 0; memset(&header, 0, sizeof(header)); - strbuf_init(&ext_header, 0); if (!sha1) { *header.typeflag = TYPEFLAG_GLOBAL_HEADER; @@ -143,8 +142,6 @@ static void write_entry(const unsigned char *sha1, struct strbuf *path, mode = 0100666; sprintf(header.name, "%s.paxheader", sha1_to_hex(sha1)); } else { - if (verbose) - fprintf(stderr, "%.*s\n", (int)path->len, path->buf); if (S_ISDIR(mode) || S_ISGITLINK(mode)) { *header.typeflag = TYPEFLAG_DIR; mode = (mode | 0777) & ~tar_umask; @@ -155,24 +152,24 @@ static void write_entry(const unsigned char *sha1, struct strbuf *path, *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; + return error("unsupported file mode: 0%o (SHA1: %s)", + mode, sha1_to_hex(sha1)); } - if (path->len > sizeof(header.name)) { - int plen = get_path_prefix(path, sizeof(header.prefix)); - int rest = path->len - plen - 1; + if (pathlen > sizeof(header.name)) { + size_t plen = get_path_prefix(path, pathlen, + sizeof(header.prefix)); + size_t rest = pathlen - plen - 1; if (plen > 0 && rest <= sizeof(header.name)) { - memcpy(header.prefix, path->buf, plen); - memcpy(header.name, path->buf + plen + 1, rest); + memcpy(header.prefix, path, plen); + memcpy(header.name, path + plen + 1, rest); } else { sprintf(header.name, "%s.data", sha1_to_hex(sha1)); strbuf_append_ext_header(&ext_header, "path", - path->buf, path->len); + path, pathlen); } } else - memcpy(header.name, path->buf, path->len); + memcpy(header.name, path, pathlen); } if (S_ISLNK(mode) && buffer) { @@ -187,7 +184,7 @@ static void write_entry(const unsigned char *sha1, struct strbuf *path, sprintf(header.mode, "%07o", mode & 07777); sprintf(header.size, "%011lo", S_ISREG(mode) ? size : 0); - sprintf(header.mtime, "%011lo", archive_time); + sprintf(header.mtime, "%011lo", (unsigned long) args->time); sprintf(header.uid, "%07o", 0); sprintf(header.gid, "%07o", 0); @@ -202,22 +199,90 @@ static void write_entry(const unsigned char *sha1, struct strbuf *path, sprintf(header.chksum, "%07o", ustar_header_chksum(&header)); if (ext_header.len > 0) { - write_entry(sha1, NULL, 0, ext_header.buf, ext_header.len); + err = write_tar_entry(args, sha1, NULL, 0, 0, ext_header.buf, + ext_header.len); + if (err) + return err; } strbuf_release(&ext_header); write_blocked(&header, sizeof(header)); if (S_ISREG(mode) && buffer && size > 0) write_blocked(buffer, size); + return err; } -static void write_global_extended_header(const unsigned char *sha1) +static int write_global_extended_header(struct archiver_args *args) { - struct strbuf ext_header; + const unsigned char *sha1 = args->commit_sha1; + struct strbuf ext_header = STRBUF_INIT; + int err; - strbuf_init(&ext_header, 0); strbuf_append_ext_header(&ext_header, "comment", sha1_to_hex(sha1), 40); - write_entry(NULL, NULL, 0, ext_header.buf, ext_header.len); + err = write_tar_entry(args, NULL, NULL, 0, 0, ext_header.buf, + ext_header.len); strbuf_release(&ext_header); + return err; +} + +static struct archiver **tar_filters; +static int nr_tar_filters; +static int alloc_tar_filters; + +static struct archiver *find_tar_filter(const char *name, int len) +{ + int i; + for (i = 0; i < nr_tar_filters; i++) { + struct archiver *ar = tar_filters[i]; + if (!strncmp(ar->name, name, len) && !ar->name[len]) + return ar; + } + return NULL; +} + +static int tar_filter_config(const char *var, const char *value, void *data) +{ + struct archiver *ar; + const char *dot; + const char *name; + const char *type; + int namelen; + + if (prefixcmp(var, "tar.")) + return 0; + dot = strrchr(var, '.'); + if (dot == var + 9) + return 0; + + name = var + 4; + namelen = dot - name; + type = dot + 1; + + ar = find_tar_filter(name, namelen); + if (!ar) { + ar = xcalloc(1, sizeof(*ar)); + ar->name = xmemdupz(name, namelen); + ar->write_archive = write_tar_filter_archive; + ar->flags = ARCHIVER_WANT_COMPRESSION_LEVELS; + ALLOC_GROW(tar_filters, nr_tar_filters + 1, alloc_tar_filters); + tar_filters[nr_tar_filters++] = ar; + } + + if (!strcmp(type, "command")) { + if (!value) + return config_error_nonbool(var); + free(ar->data); + ar->data = xstrdup(value); + return 0; + } + if (!strcmp(type, "remote")) { + if (git_config_bool(var, value)) + ar->flags |= ARCHIVER_REMOTE; + else + ar->flags &= ~ARCHIVER_REMOTE; + return 0; + } + + return 0; } static int git_tar_config(const char *var, const char *value, void *cb) @@ -231,65 +296,82 @@ static int git_tar_config(const char *var, const char *value, void *cb) } return 0; } - return git_default_config(var, value, cb); + + return tar_filter_config(var, value, cb); } -static int write_tar_entry(const unsigned char *sha1, - const char *base, int baselen, - const char *filename, unsigned mode, int stage) +static int write_tar_archive(const struct archiver *ar, + struct archiver_args *args) { - static struct strbuf path = STRBUF_INIT; - void *buffer; - enum object_type type; - unsigned long size; - - strbuf_reset(&path); - strbuf_grow(&path, PATH_MAX); - strbuf_add(&path, base, baselen); - strbuf_addstr(&path, filename); - if (S_ISDIR(mode) || S_ISGITLINK(mode)) { - strbuf_addch(&path, '/'); - buffer = NULL; - size = 0; - } else { - buffer = sha1_file_to_archive(path.buf + base_len, sha1, mode, - &type, &size, commit); - if (!buffer) - die("cannot read %s", sha1_to_hex(sha1)); - } - - write_entry(sha1, &path, mode, buffer, size); - free(buffer); + int err = 0; - return READ_TREE_RECURSIVE; + if (args->commit_sha1) + err = write_global_extended_header(args); + if (!err) + err = write_archive_entries(args, write_tar_entry); + if (!err) + write_trailer(); + return err; } -int write_tar_archive(struct archiver_args *args) +static int write_tar_filter_archive(const struct archiver *ar, + struct archiver_args *args) { - int plen = args->base ? strlen(args->base) : 0; - - git_config(git_tar_config, NULL); - - archive_time = args->time; - verbose = args->verbose; - commit = args->commit; - base_len = args->base ? strlen(args->base) : 0; + struct strbuf cmd = STRBUF_INIT; + struct child_process filter; + const char *argv[2]; + int r; + + if (!ar->data) + die("BUG: tar-filter archiver called with no filter defined"); + + strbuf_addstr(&cmd, ar->data); + if (args->compression_level >= 0) + strbuf_addf(&cmd, " -%d", args->compression_level); + + memset(&filter, 0, sizeof(filter)); + argv[0] = cmd.buf; + argv[1] = NULL; + filter.argv = argv; + filter.use_shell = 1; + filter.in = -1; + + if (start_command(&filter) < 0) + die_errno("unable to start '%s' filter", argv[0]); + close(1); + if (dup2(filter.in, 1) < 0) + die_errno("unable to redirect descriptor"); + close(filter.in); + + r = write_tar_archive(ar, args); + + close(1); + if (finish_command(&filter) != 0) + die("'%s' filter reported error", argv[0]); + + strbuf_release(&cmd); + return r; +} - if (args->commit_sha1) - write_global_extended_header(args->commit_sha1); +static struct archiver tar_archiver = { + "tar", + write_tar_archive, + ARCHIVER_REMOTE +}; - if (args->base && plen > 0 && args->base[plen - 1] == '/') { - char *base = xstrdup(args->base); - int baselen = strlen(base); +void init_tar_archiver(void) +{ + int i; + register_archiver(&tar_archiver); - while (baselen > 0 && base[baselen - 1] == '/') - base[--baselen] = '\0'; - write_tar_entry(args->tree->object.sha1, "", 0, base, 040777, 0); - free(base); + tar_filter_config("tar.tgz.command", "gzip -cn", NULL); + tar_filter_config("tar.tgz.remote", "true", NULL); + tar_filter_config("tar.tar.gz.command", "gzip -cn", NULL); + tar_filter_config("tar.tar.gz.remote", "true", NULL); + git_config(git_tar_config, NULL); + for (i = 0; i < nr_tar_filters; i++) { + /* omit any filters that never had a command configured */ + if (tar_filters[i]->data) + register_archiver(tar_filters[i]); } - read_tree_recursive(args->tree, args->base, plen, 0, - args->pathspec, write_tar_entry); - write_trailer(); - - return 0; } |