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2015-03-05zlib: initialize git_zstream in git_deflate_init{,_gzip,_raw}Libravatar René Scharfe1-2/+0
Clear the git_zstream variable at the start of git_deflate_init() etc. so that callers don't have to do that. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-06-06Merge branch 'sb/archive-zip-double-assignment-fix'Libravatar Junio C Hamano1-1/+0
* sb/archive-zip-double-assignment-fix: archive-zip:write_zip_entry: Remove second reset of size variable to zero.
2013-05-29archive-zip:write_zip_entry: Remove second reset of size variable to zero.Libravatar Stefan Beller1-1/+0
It is set to zero just 3 lines before. Reported by cppcheck. Signed-off-by: Stefan Beller <stefanbeller@googlemail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-16archive-zip: use deflateInit2() to ask for raw compressed dataLibravatar René Scharfe1-22/+14
We use the function git_deflate_init() -- which wraps the zlib function deflateInit() -- to initialize compression of ZIP file entries. This results in compressed data prefixed with a two-bytes long header and followed by a four-bytes trailer. ZIP file entries consist of ZIP headers and raw compressed data instead, so we remove the zlib wrapper before writing the result. We can ask zlib for the the raw compressed data without the unwanted parts in the first place by using deflateInit2() and specifying a negative number of bits to size the window. For that purpose, factor out the function do_git_deflate_init() and add git_deflate_init_raw(), which wraps it. Then use the latter in archive-zip.c and get rid of the code that stripped the zlib header and trailer. Also rename the helper function zlib_deflate() to zlib_deflate_raw() to reflect the change. Thus we avoid generating data that we throw away anyway, the code becomes shorter and some magic constants are removed. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-02-27archive-zip: fix compressed size for stored export-subst filesLibravatar René Scharfe1-1/+1
Currently ZIP archive entries of files with export-subst attribute are broken if they are stored uncompressed. We get the size of a file from sha1_object_info(), but this number is likely wrong for files whose contents are changed due to export-subst placeholder expansion. We use sha1_file_to_archive() to get the expanded file contents and size in that case. We proceed to use that size for the uncompressed size field (good), but the compressed size field is set based on the size from sha1_object_info() (bad). This matters only for uncompressed files because for deflated files we use the correct value after compression is done. And for files without export-subst expansion the sizes from sha1_object_info() and sha1_file_to_archive() are the same, so they are unaffected as well. This patch fixes the issue by setting the compressed size based on the uncompressed size only after we actually know the latter. Also make use of the test file substfile1 to check for the breakage; it was only stored verbatim so far. For that purpose, set the attribute export-subst and replace its contents with the expected expansion after committing. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-01-11Merge branch 'rs/zip-with-uncompressed-size-in-the-header'Libravatar Junio C Hamano1-5/+2
Improve compatibility of our zip output to fill uncompressed size in the header, which we can do without seeking back (even though it should not be necessary). * rs/zip-with-uncompressed-size-in-the-header: archive-zip: write uncompressed size into header even with streaming
2013-01-06archive-zip: write uncompressed size into header even with streamingLibravatar René Scharfe1-5/+2
We record the uncompressed and compressed sizes and the CRC of streamed files as zero in the local header of the file. The actual values are recorded in an extra data descriptor after the file content, and in the usual ZIP directory entry at the end of the archive. While we know the compressed size and the CRC only after we processed the contents, we actually know the uncompressed size right from the start. And for files that we store uncompressed we also already know their final size. Do it like InfoZIP's zip and recored the known values, even though they can be reconstructed using the ZIP directory and the data descriptors alone. InfoZIP's unzip worked fine before, but NetBSD's version actually depends on these fields. The uncompressed size is already set by sha1_object_info(). We just need to initialize the compressed size to zero or the uncompressed size depending on the compression method (0 means storing). The CRC was propertly initialized already. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-24archive-zip: write extended timestampLibravatar René Scharfe1-3/+24
File modification times in ZIP files are encoded in DOS format: local time with a granularity of two seconds. Add an extra field to all archive entries to also record the mtime in Unix' fashion, as UTC with a granularity of one second. This has the desirable side-effect of convincing Info-ZIP unzip 6.00 to respect general purpose flag 11, which is used to indicate that a file name is encoded in UTF-8. Any extra field would do, actually, but the extended timestamp is a reasonably small one (22 bytes per entry). Archives created by Info-ZIP zip 3.0 contain it, too (but with ctime and atime as well). Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-18archive-zip: support UTF-8 pathsLibravatar René Scharfe1-1/+21
Set general purpose flag 11 if we encounter a path that contains non-ASCII characters. We assume that all paths are given as UTF-8; no conversion is done. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-18Revert "archive-zip: support UTF-8 paths"Libravatar Junio C Hamano1-21/+6
This reverts commit 2162bd8cc461d6c3a12ab81c5db5a44bf5ecabc3; a two-patch series to replace it will follow.
2012-09-04archive-zip: support UTF-8 pathsLibravatar René Scharfe1-6/+21
Set general purpose flag 11 if we encounter a path that contains non-ASCII characters. We assume that all paths are given as UTF-8; no conversion is done. The flag seems to be ignored by unzip unless we also mark the archive entry as coming from a Unix system. This is done by setting the field creator_version ("version made by" in the standard[1]) to 0x03NN. The NN part represents the version of the standard supported by us, and this patch sets it to 3f (for version 6.3) for Unix paths. We keep creator_version set to 0 (FAT filesystem, standard version 0) in the non-special cases, as before. But when we declare a file to have a Unix path, then we have to set the file mode as well, or unzip will extract the files with the permission set 0000, i.e. inaccessible by all. [1] http://www.pkware.com/documents/casestudies/APPNOTE.TXT Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-05-03archive-zip: streaming for deflated filesLibravatar René Scharfe1-1/+63
After an entry has been streamed out, its CRC and sizes are written as part of a data descriptor. For simplicity, we make the buffer for the compressed chunks twice as big as for the uncompressed ones, to be sure the result fit in even if deflate makes them bigger. t5000 verifies output. t1050 makes sure the command always respects core.bigfilethreshold Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-05-03archive-zip: streaming for stored filesLibravatar René Scharfe1-12/+78
Write a data descriptor containing the CRC of the entry and its sizes after streaming it out. For simplicity, do that only if we're storing files (option -0) for now. t5000 verifies output. t1050 makes sure the command always respects core.bigfilethreshold Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-05-03archive-zip: factor out helpers for writing sizes and CRCLibravatar René Scharfe1-11/+28
We're going to reuse them soon for streaming. Also, update the ZIP directory only at the very end, which will also make streaming easier. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-05-03archive-zip: remove uncompressed_sizeLibravatar René Scharfe1-5/+3
We only need size and compressed_size. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-05-03archive: delegate blob reading to backendLibravatar Nguyễn Thái Ngọc Duy1-2/+13
archive-tar.c and archive-zip.c now perform conversion check, with help of sha1_file_to_archive() from archive.c This gives backends more freedom in dealing with (streaming) large blobs. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-07-19Merge branch 'jk/archive-tar-filter'Libravatar Junio C Hamano1-1/+13
* jk/archive-tar-filter: upload-archive: allow user to turn off filters archive: provide builtin .tar.gz filter archive: implement configurable tar filters archive: refactor file extension format-guessing archive: move file extension format-guessing lower archive: pass archiver struct to write_archive callback archive: refactor list of archive formats archive-tar: don't reload default config options archive: reorder option parsing and config reading
2011-06-22upload-archive: allow user to turn off filtersLibravatar Jeff King1-1/+1
Some tar filters may be very expensive to run, so sites do not want to expose them via upload-archive. This patch lets users configure tar.<filter>.remote to turn them off. By default, gzip filters are left on, as they are about as expensive as creating zip archives. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-06-22archive: pass archiver struct to write_archive callbackLibravatar Jeff King1-1/+2
The current archivers are very static; when you are in the write_tar_archive function, you know you are writing a tar. However, to facilitate runtime-configurable archivers that will share a common write function we need to tell the function which archiver was used. As a convenience, we also provide an opaque data pointer in the archiver struct so that individual archivers can put something useful there when they register themselves. Technically they could just use the "name" field to look in an internal map of names to data, but this is much simpler. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-06-22archive: refactor list of archive formatsLibravatar Jeff King1-1/+12
Most of the tar and zip code was nicely split out into two abstracted files which knew only about their specific formats. The entry point to this code was a single "write archive" function. However, as these basic formats grow more complex (e.g., by handling multiple file extensions and format names), a static list of the entry point functions won't be enough. Instead, let's provide a way for the tar and zip code to tell the main archive code what they support by registering archiver names and functions. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-06-10zlib: zlib can only process 4GB at a timeLibravatar Junio C Hamano1-1/+1
The size of objects we read from the repository and data we try to put into the repository are represented in "unsigned long", so that on larger architectures we can handle objects that weigh more than 4GB. But the interface defined in zlib.h to communicate with inflate/deflate limits avail_in (how many bytes of input are we calling zlib with) and avail_out (how many bytes of output from zlib are we ready to accept) fields effectively to 4GB by defining their type to be uInt. In many places in our code, we allocate a large buffer (e.g. mmap'ing a large loose object file) and tell zlib its size by assigning the size to avail_in field of the stream, but that will truncate the high octets of the real size. The worst part of this story is that we often pass around z_stream (the state object used by zlib) to keep track of the number of used bytes in input/output buffer by inspecting these two fields, which practically limits our callchain to the same 4GB limit. Wrap z_stream in another structure git_zstream that can express avail_in and avail_out in unsigned long. For now, just die() when the caller gives a size that cannot be given to a single zlib call. In later patches in the series, we would make git_inflate() and git_deflate() internally loop to give callers an illusion that our "improved" version of zlib interface can operate on a buffer larger than 4GB in one go. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-06-10zlib: wrap deflateBound() tooLibravatar Junio C Hamano1-1/+1
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-06-10zlib: wrap deflate side of the APILibravatar Junio C Hamano1-3/+3
Wrap deflateInit, deflate, and deflateEnd for everybody, and the sole use of deflateInit2 in remote-curl.c to tell the library to use gzip header and trailer in git_deflate_init_gzip(). There is only one caller that cares about the status from deflateEnd(). Introduce git_deflate_end_gently() to let that sole caller retrieve the status and act on it (i.e. die) for now, but we would probably want to make inflate_end/deflate_end die when they ran out of memory and get rid of the _gently() kind. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-19archive: remove unused headersLibravatar René Scharfe1-5/+0
Remove obsolete #includes. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-19archive: make zip compression level independent from core gitLibravatar René Scharfe1-4/+5
zlib_compression_level is the compression level used for git's object store. It's 1 by default, which is the fastest setting. This variable is also used as the default compression level for ZIP archives created by git archive. For archives, however, zlib's own default of 6 is more appropriate, as it's favouring small size over speed -- archive creation is not that performance critical most of the time. This patch makes git archive independent from git's internal compression level setting. It affects invocations of git archive without explicitly specified compression level option, only. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-15archive: remove extra arguments parsing codeLibravatar René Scharfe1-13/+0
Replace the code that calls backend specific argument parsers by a simple flag mechanism. This reduces code size and complexity. We can add back such a mechanism (based on incremental parse_opt(), perhaps) when we need it. The compression level parameter, though, is going to be shared by future compressing backends like tgz. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-15archive: centralize archive entry writingLibravatar René Scharfe1-75/+15
Add the exported function write_archive_entries() to archive.c, which uses the new ability of read_tree_recursive() to pass a context pointer to its callback in order to centralize previously duplicated code. The new callback function write_archive_entry() does the work that every archiver backend needs to do: loading file contents, entering subdirectories, handling file attributes, constructing the full path of the entry. All that done, it calls the backend specific write_archive_entry_fn_t function. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-15archive: add baselen member to struct archiver_argsLibravatar René Scharfe1-5/+3
Calculate the length of base and save it in a new member of struct archiver_args. This way we don't have to compute it in each of the format backends. Note: parse_archive_args() guarantees that ->base won't ever be NULL. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-07-15add context pointer to read_tree_recursive()Libravatar René Scharfe1-5/+6
Add a pointer parameter to read_tree_recursive(), which is passed to the callback function. This allows callers of read_tree_recursive() to share data with the callback without resorting to global variables. All current callers pass NULL. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-06-09Teach new attribute 'export-ignore' to git-archiveLibravatar René Scharfe1-0/+2
Paths marked with this attribute are not output to git-archive output. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-04-10git-archive: ignore prefix when checking file attributeLibravatar René Scharfe1-2/+4
Ulrik Sverdrup noticed that git-archive doesn't correctly apply the attribute export-subst when the option --prefix is given, too. When it checked if a file has the attribute turned on, git-archive would try to look up the full path -- including the prefix -- in .gitattributes. That's wrong, as the prefix doesn't need to have any relation to any existing directories, tracked or not. This patch makes git-archive ignore the prefix when looking up if value of the attribute export-subst for a file. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-09-18preserve executable bits in zip archivesLibravatar Dmitry Potapov1-2/+4
Correct `git-archive --format=zip' command to preserve executable bits in zip archives. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-09-03archive: specfile support (--pretty=format: in archive files)Libravatar René Scharfe1-1/+4
Add support for a new attribute, specfile. Files marked as being specfiles are expanded by git-archive when they are written to an archive. It has no effect on worktree files. The same placeholders as those for the option --pretty=format: of git-log et al. can be used. The attribute is useful for creating auto-updating specfiles. It is limited by the underlying function format_commit_message(), though. E.g. currently there is no placeholder for git-describe like output, and expanded specfiles can't contain NUL bytes. That can be fixed in format_commit_message() later and will then benefit users of git-log, too. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-05-21rename dirlink to gitlink.Libravatar Martin Waitz1-1/+1
Unify naming of plumbing dirlink/gitlink concept: git ls-files -z '*.[ch]' | xargs -0 perl -pi -e 's/dirlink/gitlink/g;' -e 's/DIRLNK/GITLINK/g;' Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-05-18git-archive: convert archive entries like checkouts doLibravatar René Scharfe1-1/+1
As noted by Johan Herland, git-archive is a kind of checkout and needs to apply any checkout filters that might be configured. This patch adds the convenience function convert_sha1_file which returns a buffer containing the object's contents, after converting, if necessary (i.e. it's a combination of read_sha1_file and convert_to_working_tree). Direct calls to read_sha1_file in git-archive are then replaced by calls to convert_sha1_file. Since convert_sha1_file expects its path argument to be NUL-terminated -- a convention it inherits from convert_to_working_tree -- the patch also changes the path handling in archive-tar.c to always NUL-terminate the string. It used to solely rely on the len field of struct strbuf before. archive-zip.c already NUL-terminates the path and thus needs no such change. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-05-12git-archive: don't die when repository uses subprojectsLibravatar Lars Hjemli1-2/+2
Both archive-tar and archive-zip needed to be taught about subprojects. The tar function died when trying to read the subproject commit object, while the zip function reported "unsupported file mode". This fixes both by representing the subproject as an empty directory. Signed-off-by: Lars Hjemli <hjemli@gmail.com> Signed-off-by: Junio C Hamano <junkio@cox.net>
2007-02-27convert object type handling from a string to a numberLibravatar Nicolas Pitre1-2/+2
We currently have two parallel notation for dealing with object types in the code: a string and a numerical value. One of them is obviously redundent, and the most used one requires more stack space and a bunch of strcmp() all over the place. This is an initial step for the removal of the version using a char array found in object reading code paths. The patch is unfortunately large but there is no sane way to split it in smaller parts without breaking the system. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-12-20simplify inclusion of system header files.Libravatar Junio C Hamano1-1/+0
This is a mechanical clean-up of the way *.c files include system header files. (1) sources under compat/, platform sha-1 implementations, and xdelta code are exempt from the following rules; (2) the first #include must be "git-compat-util.h" or one of our own header file that includes it first (e.g. config.h, builtin.h, pkt-line.h); (3) system headers that are included in "git-compat-util.h" need not be included in individual C source files. (4) "git-compat-util.h" does not have to include subsystem specific header files (e.g. expat.h). Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-11-23archive-zip: don't use sizeof(struct ...)Libravatar René Scharfe1-6/+18
We can't rely on sizeof(struct zip_*) returning the sum of all struct members. At least on ARM padding is added at the end, as Gerrit Pape reported. This fixes the problem but still lets the compiler do the summing by introducing explicit padding at the end of the structs and then taking its offset as the combined size of the preceding members. As Junio correctly notes, the _end[] marker array's size must be greater than zero for compatibility with compilers other than gcc. The space wasted by the markers can safely be neglected because we only have one instance of each struct, i.e. in sum 3 wasted bytes on i386, and 0 on ARM. :) We still rely on the compiler to not add padding between the struct members, but that's reasonable given that all of them are unsigned char arrays. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-11-18sparse fix: Using plain integer as NULL pointerLibravatar Rene Scharfe1-1/+1
Z_NULL is defined as 0, use a proper NULL pointer in its stead. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-10-07git-archive --format=zip: add symlink supportLibravatar Rene Scharfe1-4/+9
Add symlink support to ZIP file creation, and a few tests. This implementation sets the "version made by" field (creator_version) to Unix for symlinks, only; regular files and directories are still marked as originating from FAT/VFAT/NTFS. Also set "external file attributes" (attr2) to 0 for regular files and 16 for directories (FAT attribute), and to the file mode for symlinks. We could always set the creator_version to Unix and include the mode, but then Info-ZIP unzip would set the mode of the extracted files to *exactly* the value stored in attr2. The FAT trick makes it apply the umask instead. Note: FAT has no executable bit, so this information is not stored in the ZIP file. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-10-07git-archive --format=zip: use default version IDLibravatar Rene Scharfe1-2/+2
Use 10 for the "version needed to extract" field. This is the default value, and we want to use it because we don't do anything special. Info-ZIP's zip uses it, too. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-09-23Rename builtin-zip-tree.c to archive-zip.cLibravatar Rene Scharfe1-0/+333
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <junkio@cox.net>