[PATCH v5 00/15] Git filter protocol

From: Lars Schneider <larsxschneider@gmail.com>

Hi all,

## Notable changes since v4
* drop the shutdown capability
* add error-all response to signal that the filter does not want to filter anymore
* extend init sequence to negotiate version number and capabilities
  (plus detect wrongly configured version 1 filters)
* improve status response format according to Peff's suggestions
* fix Git for Window support

## Patches
* 01-09: Make pktline ready to be used for filters.
* 01 - @Junio: I know you told me twice that you don't like this patch but
               please look closely: the patch does not add a new interface to
               pktline. It is a private functions used 03.
* 08 - This patch changes the pktline interface as it renames packet_write() to
       packet_write_fmt() as suggested by Junio.
       (This patch is not required for the the series and could be dropped)
* 10-13: Prepare convert code.
*    14: Main contribution.
*    15: Proposed fix to make the long running filters work on Windows. See
         the discussion here:
         https://github.com/git-for-windows/git/issues/770#issuecomment-238361829
         (This patch is not required in Git core and could be dropped)

## Jakub
* http://public-inbox.org/git/607c07fe-5b6f-fd67-13e1-705020c267ee%40gmail.com/
  * make Git start the handshake with the filter to detect one-shot filter
    mis configured as process-filter
  * filter driver refusing to filter further

* http://public-inbox.org/git/e8b550ed-1765-764f-49e5-72e5a609d936%40gmail.com/
  * improve commit messages

* http://public-inbox.org/git/0b7d7d96-dfdc-54a4-2c24-2aead6743ae1%40gmail.com/
  * handle sigpipe correctly
  * use cp instead of cat where appropriate
  * explicitly name the test with a binary file (containing \0)

## Junio
* http://public-inbox.org/git/xmqq8twd8uld.fsf%40gitster.mtv.corp.google.com/
  * shorten variable names
  * do not initialize statics explicitly to 0
  * no // comments
  * replace "ret" with "!error"

* http://public-inbox.org/git/CAPc5daV3Tke4qHjtpri%3D6QCRaOax_K3uYhpFzRcd271%3DGHj1%2BQ%40mail.gmail.com/
  * rename packet_write() to packet_write_fmt()

## Peff
* http://public-inbox.org/git/20160803224619.bwtbvmslhuicx2qi%40sigill.intra.peff.net/
  * change capabilities format

* http://public-inbox.org/git/20160808150255.2otm3z5fluimpiqw%40sigill.intra.peff.net/
  * change status response format

## Eric
* http://public-inbox.org/git/20160805185559.GB463%40starla/
  * die if larger-than-4GB files are processed on 32-bit

Thanks a lot for the valuable reviews!

Best, Lars

You can find a branch with the source on GitHub here: https://github.com/larsxschneider/git/tree/protocol-filter/v5

I also rebased the series on top of the latest Git for Windows master: https://github.com/larsxschneider/git/tree/protocol-filter/v5-win

Lars Schneider (15):
  pkt-line: extract set_packet_header()
  pkt-line: call packet_trace() only if a packet is actually send
  pkt-line: add `gentle` parameter to format_packet()
  pkt-line: add packet_write_gently()
  pkt-line: add packet_write_gently_fmt()
  pkt-line: add packet_flush_gently()
  pkt-line: add functions to read/write flush terminated packet streams
  pkt-line: rename packet_write() to packet_write_fmt()
  pack-protocol: fix maximum pkt-line size
  convert: quote filter names in error messages
  convert: modernize tests
  convert: generate large test files only once
  convert: make apply_filter() adhere to standard Git error handling
  convert: add filter.<driver>.process option
  read-cache: make sure file handles are not inherited by child
    processes

 Documentation/gitattributes.txt             | 139 +++++++-
 Documentation/technical/protocol-common.txt |   6 +-
 builtin/archive.c                           |   4 +-
 builtin/receive-pack.c                      |   4 +-
 builtin/remote-ext.c                        |   4 +-
 builtin/upload-archive.c                    |   4 +-
 connect.c                                   |   2 +-
 convert.c                                   | 367 ++++++++++++++++++---
 daemon.c                                    |   2 +-
 http-backend.c                              |   2 +-
 pkt-line.c                                  | 155 ++++++++-
 pkt-line.h                                  |  12 +-
 read-cache.c                                |   2 +-
 shallow.c                                   |   2 +-
 t/t0021-conversion.sh                       | 482 +++++++++++++++++++++++++---
 t/t0021/rot13-filter.pl                     | 176 ++++++++++
 unpack-trees.c                              |   1 +
 upload-pack.c                               |  30 +-
 18 files changed, 1267 insertions(+), 127 deletions(-)
 create mode 100755 t/t0021/rot13-filter.pl

-- 2.9.2