Merge branch 'rs/archive-zip-many' into maint
"git archive" did not use zip64 extension when creating an archive with more than 64k entries, which nobody should need, right ;-)? * rs/archive-zip-many: archive-zip: support more than 65535 entries archive-zip: use a local variable to store the creator version t5004: test ZIP archives with many entries
This commit is contained in:
Junio C Hamano
commit
1c82039228
@ -16,7 +16,9 @@ static unsigned int zip_dir_size;
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static unsigned int zip_offset;
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static unsigned int zip_dir_offset;
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static unsigned int zip_dir_entries;
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static uint64_t zip_dir_entries;
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static unsigned int max_creator_version;
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#define ZIP_DIRECTORY_MIN_SIZE (1024 * 1024)
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#define ZIP_STREAM (1 << 3)
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@ -86,6 +88,28 @@ struct zip_extra_mtime {
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unsigned char _end[1];
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};
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struct zip64_dir_trailer {
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unsigned char magic[4];
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unsigned char record_size[8];
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unsigned char creator_version[2];
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unsigned char version[2];
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unsigned char disk[4];
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unsigned char directory_start_disk[4];
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unsigned char entries_on_this_disk[8];
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unsigned char entries[8];
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unsigned char size[8];
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unsigned char offset[8];
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unsigned char _end[1];
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};
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struct zip64_dir_trailer_locator {
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unsigned char magic[4];
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unsigned char disk[4];
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unsigned char offset[8];
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unsigned char number_of_disks[4];
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unsigned char _end[1];
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};
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/*
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* On ARM, padding is added at the end of the struct, so a simple
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* sizeof(struct ...) reports two bytes more than the payload size
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@ -98,6 +122,12 @@ struct zip_extra_mtime {
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#define ZIP_EXTRA_MTIME_SIZE offsetof(struct zip_extra_mtime, _end)
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#define ZIP_EXTRA_MTIME_PAYLOAD_SIZE \
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(ZIP_EXTRA_MTIME_SIZE - offsetof(struct zip_extra_mtime, flags))
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#define ZIP64_DIR_TRAILER_SIZE offsetof(struct zip64_dir_trailer, _end)
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#define ZIP64_DIR_TRAILER_RECORD_SIZE \
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(ZIP64_DIR_TRAILER_SIZE - \
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offsetof(struct zip64_dir_trailer, creator_version))
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#define ZIP64_DIR_TRAILER_LOCATOR_SIZE \
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offsetof(struct zip64_dir_trailer_locator, _end)
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static void copy_le16(unsigned char *dest, unsigned int n)
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{
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@ -113,6 +143,31 @@ static void copy_le32(unsigned char *dest, unsigned int n)
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dest[3] = 0xff & (n >> 030);
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}
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static void copy_le64(unsigned char *dest, uint64_t n)
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{
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dest[0] = 0xff & n;
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dest[1] = 0xff & (n >> 010);
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dest[2] = 0xff & (n >> 020);
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dest[3] = 0xff & (n >> 030);
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dest[4] = 0xff & (n >> 040);
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dest[5] = 0xff & (n >> 050);
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dest[6] = 0xff & (n >> 060);
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dest[7] = 0xff & (n >> 070);
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}
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static uint64_t clamp_max(uint64_t n, uint64_t max, int *clamped)
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{
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if (n <= max)
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return n;
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*clamped = 1;
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return max;
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}
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static void copy_le16_clamp(unsigned char *dest, uint64_t n, int *clamped)
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{
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copy_le16(dest, clamp_max(n, 0xffff, clamped));
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}
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static void *zlib_deflate_raw(void *data, unsigned long size,
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int compression_level,
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unsigned long *compressed_size)
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@ -223,6 +278,7 @@ static int write_zip_entry(struct archiver_args *args,
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unsigned long size;
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int is_binary = -1;
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const char *path_without_prefix = path + args->baselen;
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unsigned int creator_version = 0;
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crc = crc32(0, NULL, 0);
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@ -251,6 +307,8 @@ static int write_zip_entry(struct archiver_args *args,
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method = 0;
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attr2 = S_ISLNK(mode) ? ((mode | 0777) << 16) :
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(mode & 0111) ? ((mode) << 16) : 0;
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if (S_ISLNK(mode) || (mode & 0111))
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creator_version = 0x0317;
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if (S_ISREG(mode) && args->compression_level != 0 && size > 0)
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method = 8;
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@ -279,6 +337,9 @@ static int write_zip_entry(struct archiver_args *args,
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sha1_to_hex(sha1));
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}
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if (creator_version > max_creator_version)
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max_creator_version = creator_version;
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if (buffer && method == 8) {
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out = deflated = zlib_deflate_raw(buffer, size,
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args->compression_level,
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@ -303,8 +364,7 @@ static int write_zip_entry(struct archiver_args *args,
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}
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copy_le32(dirent.magic, 0x02014b50);
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copy_le16(dirent.creator_version,
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S_ISLNK(mode) || (S_ISREG(mode) && (mode & 0111)) ? 0x0317 : 0);
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copy_le16(dirent.creator_version, creator_version);
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copy_le16(dirent.version, 10);
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copy_le16(dirent.flags, flags);
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copy_le16(dirent.compression_method, method);
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@ -437,20 +497,49 @@ static int write_zip_entry(struct archiver_args *args,
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return 0;
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}
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static void write_zip64_trailer(void)
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{
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struct zip64_dir_trailer trailer64;
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struct zip64_dir_trailer_locator locator64;
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copy_le32(trailer64.magic, 0x06064b50);
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copy_le64(trailer64.record_size, ZIP64_DIR_TRAILER_RECORD_SIZE);
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copy_le16(trailer64.creator_version, max_creator_version);
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copy_le16(trailer64.version, 45);
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copy_le32(trailer64.disk, 0);
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copy_le32(trailer64.directory_start_disk, 0);
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copy_le64(trailer64.entries_on_this_disk, zip_dir_entries);
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copy_le64(trailer64.entries, zip_dir_entries);
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copy_le64(trailer64.size, zip_dir_offset);
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copy_le64(trailer64.offset, zip_offset);
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copy_le32(locator64.magic, 0x07064b50);
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copy_le32(locator64.disk, 0);
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copy_le64(locator64.offset, zip_offset + zip_dir_offset);
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copy_le32(locator64.number_of_disks, 1);
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write_or_die(1, &trailer64, ZIP64_DIR_TRAILER_SIZE);
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write_or_die(1, &locator64, ZIP64_DIR_TRAILER_LOCATOR_SIZE);
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}
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static void write_zip_trailer(const unsigned char *sha1)
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{
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struct zip_dir_trailer trailer;
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int clamped = 0;
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copy_le32(trailer.magic, 0x06054b50);
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copy_le16(trailer.disk, 0);
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copy_le16(trailer.directory_start_disk, 0);
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copy_le16(trailer.entries_on_this_disk, zip_dir_entries);
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copy_le16(trailer.entries, zip_dir_entries);
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copy_le16_clamp(trailer.entries_on_this_disk, zip_dir_entries,
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&clamped);
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copy_le16_clamp(trailer.entries, zip_dir_entries, &clamped);
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copy_le32(trailer.size, zip_dir_offset);
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copy_le32(trailer.offset, zip_offset);
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copy_le16(trailer.comment_length, sha1 ? GIT_SHA1_HEXSZ : 0);
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write_or_die(1, zip_dir, zip_dir_offset);
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if (clamped)
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write_zip64_trailer();
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write_or_die(1, &trailer, ZIP_DIR_TRAILER_SIZE);
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if (sha1)
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write_or_die(1, sha1_to_hex(sha1), GIT_SHA1_HEXSZ);
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@ -115,4 +115,44 @@ test_expect_success 'archive empty subtree by direct pathspec' '
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check_dir extract sub
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'
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ZIPINFO=zipinfo
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test_lazy_prereq ZIPINFO '
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n=$("$ZIPINFO" "$TEST_DIRECTORY"/t5004/empty.zip | sed -n "2s/.* //p")
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test "x$n" = "x0"
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'
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test_expect_success ZIPINFO 'zip archive with many entries' '
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# add a directory with 256 files
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mkdir 00 &&
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for a in 0 1 2 3 4 5 6 7 8 9 a b c d e f
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do
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for b in 0 1 2 3 4 5 6 7 8 9 a b c d e f
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do
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: >00/$a$b
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done
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done &&
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git add 00 &&
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git commit -m "256 files in 1 directory" &&
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# duplicate it to get 65536 files in 256 directories
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subtree=$(git write-tree --prefix=00/) &&
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for c in 0 1 2 3 4 5 6 7 8 9 a b c d e f
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do
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for d in 0 1 2 3 4 5 6 7 8 9 a b c d e f
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do
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echo "040000 tree $subtree $c$d"
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done
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done >tree &&
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tree=$(git mktree <tree) &&
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# zip them
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git archive -o many.zip $tree &&
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# check the number of entries in the ZIP file directory
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expr 65536 + 256 >expect &&
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"$ZIPINFO" many.zip | head -2 | sed -n "2s/.* //p" >actual &&
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test_cmp expect actual
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'
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test_done
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