From 4aff646d17e81084000100da586bef8f9d6a17a5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ren=C3=A9=20Scharfe?= Date: Thu, 5 Mar 2015 20:06:02 +0100 Subject: [PATCH] archive-zip: mark text files in archives Set the text flag for ZIP archive entries that look like text files so that unzip -a can be used to perform end-of-line conversions. Info-ZIP zip does the same. Detect binary files the same way as git diff and git grep do, namely by checking for the attribute "diff" and its negation "-diff", and if none is found by falling back to checking for the presence of NUL bytes in the first few bytes of the file contents. 7-Zip, Windows' built-in ZIP functionality and Info-ZIP unzip without the switch -a are not affected by the change and still extract text files without doing any end-of-line conversions. NB: The actual end-of-line style used in the archive entries doesn't matter to unzip -a, as it converts any CR, CRLF and LF to the line end characters appropriate for the platform it is running on. Suggested-by: Ulrike Fischer Signed-off-by: Rene Scharfe Signed-off-by: Junio C Hamano --- archive-zip.c | 25 +++++++++++++++++++++- t/t5003-archive-zip.sh | 47 +++++++++++++++++++++++++++++++++++++++++- 2 files changed, 70 insertions(+), 2 deletions(-) diff --git a/archive-zip.c b/archive-zip.c index 4bde019bce..0f9e87f46e 100644 --- a/archive-zip.c +++ b/archive-zip.c @@ -5,6 +5,8 @@ #include "archive.h" #include "streaming.h" #include "utf8.h" +#include "userdiff.h" +#include "xdiff-interface.h" static int zip_date; static int zip_time; @@ -189,6 +191,16 @@ static int has_only_ascii(const char *s) } } +static int entry_is_binary(const char *path, const void *buffer, size_t size) +{ + struct userdiff_driver *driver = userdiff_find_by_path(path); + if (!driver) + driver = userdiff_find_by_name("default"); + if (driver->binary != -1) + return driver->binary; + return buffer_is_binary(buffer, size); +} + #define STREAM_BUFFER_SIZE (1024 * 16) static int write_zip_entry(struct archiver_args *args, @@ -210,6 +222,8 @@ static int write_zip_entry(struct archiver_args *args, struct git_istream *stream = NULL; unsigned long flags = 0; unsigned long size; + int is_binary = -1; + const char *path_without_prefix = path + args->baselen; crc = crc32(0, NULL, 0); @@ -256,6 +270,8 @@ static int write_zip_entry(struct archiver_args *args, return error("cannot read %s", sha1_to_hex(sha1)); crc = crc32(crc, buffer, size); + is_binary = entry_is_binary(path_without_prefix, + buffer, size); out = buffer; } compressed_size = (method == 0) ? size : 0; @@ -300,7 +316,6 @@ static int write_zip_entry(struct archiver_args *args, copy_le16(dirent.extra_length, ZIP_EXTRA_MTIME_SIZE); copy_le16(dirent.comment_length, 0); copy_le16(dirent.disk, 0); - copy_le16(dirent.attr1, 0); copy_le32(dirent.attr2, attr2); copy_le32(dirent.offset, zip_offset); @@ -328,6 +343,9 @@ static int write_zip_entry(struct archiver_args *args, if (readlen <= 0) break; crc = crc32(crc, buf, readlen); + if (is_binary == -1) + is_binary = entry_is_binary(path_without_prefix, + buf, readlen); write_or_die(1, buf, readlen); } close_istream(stream); @@ -361,6 +379,9 @@ static int write_zip_entry(struct archiver_args *args, if (readlen <= 0) break; crc = crc32(crc, buf, readlen); + if (is_binary == -1) + is_binary = entry_is_binary(path_without_prefix, + buf, readlen); zstream.next_in = buf; zstream.avail_in = readlen; @@ -405,6 +426,8 @@ static int write_zip_entry(struct archiver_args *args, free(deflated); free(buffer); + copy_le16(dirent.attr1, !is_binary); + memcpy(zip_dir + zip_dir_offset, &dirent, ZIP_DIR_HEADER_SIZE); zip_dir_offset += ZIP_DIR_HEADER_SIZE; memcpy(zip_dir + zip_dir_offset, path, pathlen); diff --git a/t/t5003-archive-zip.sh b/t/t5003-archive-zip.sh index 21a5c93f41..fb8cdf68bc 100755 --- a/t/t5003-archive-zip.sh +++ b/t/t5003-archive-zip.sh @@ -33,6 +33,37 @@ check_zip() { test_expect_success UNZIP " validate file contents" " diff -r a ${dir_with_prefix}a " + + dir=eol_$1 + dir_with_prefix=$dir/$2 + extracted=${dir_with_prefix}a + original=a + + test_expect_success UNZIP " extract ZIP archive with EOL conversion" ' + (mkdir $dir && cd $dir && "$GIT_UNZIP" -a ../$zipfile) + ' + + test_expect_success UNZIP " validate that text files are converted" " + test_cmp_bin $extracted/text.cr $extracted/text.crlf && + test_cmp_bin $extracted/text.cr $extracted/text.lf + " + + test_expect_success UNZIP " validate that binary files are unchanged" " + test_cmp_bin $original/binary.cr $extracted/binary.cr && + test_cmp_bin $original/binary.crlf $extracted/binary.crlf && + test_cmp_bin $original/binary.lf $extracted/binary.lf + " + + test_expect_success UNZIP " validate that diff files are converted" " + test_cmp_bin $extracted/diff.cr $extracted/diff.crlf && + test_cmp_bin $extracted/diff.cr $extracted/diff.lf + " + + test_expect_success UNZIP " validate that -diff files are unchanged" " + test_cmp_bin $original/nodiff.cr $extracted/nodiff.cr && + test_cmp_bin $original/nodiff.crlf $extracted/nodiff.crlf && + test_cmp_bin $original/nodiff.lf $extracted/nodiff.lf + " } test_expect_success \ @@ -41,6 +72,18 @@ test_expect_success \ echo simple textfile >a/a && mkdir a/bin && cp /bin/sh a/bin && + printf "text\r" >a/text.cr && + printf "text\r\n" >a/text.crlf && + printf "text\n" >a/text.lf && + printf "text\r" >a/nodiff.cr && + printf "text\r\n" >a/nodiff.crlf && + printf "text\n" >a/nodiff.lf && + printf "\0\r" >a/binary.cr && + printf "\0\r\n" >a/binary.crlf && + printf "\0\n" >a/binary.lf && + printf "\0\r" >a/diff.cr && + printf "\0\r\n" >a/diff.crlf && + printf "\0\n" >a/diff.lf && printf "A\$Format:%s\$O" "$SUBSTFORMAT" >a/substfile1 && printf "A not substituted O" >a/substfile2 && (p=long_path_to_a_file && cd a && @@ -70,7 +113,9 @@ test_expect_success \ git update-ref HEAD $(TZ=GMT GIT_COMMITTER_DATE="2005-05-27 22:00:00" \ git commit-tree $treeid >.git/info/attributes && + echo "a/diff.* diff" >>.git/info/attributes && echo "substfile?" export-subst >>.git/info/attributes && git log --max-count=1 "--pretty=format:A${SUBSTFORMAT}O" HEAD \ >a/substfile1