[PATCH v1 0/3] Add support for downloading blobs on demand

We have a couple of patch series we’re working on (ObjectDB/Read-Object, Watchman integration) where we could use the ability to have a background process running that can accept multiple commands thus avoiding the overhead of spawning a new process for every command.

The ability to do this was added in:

	Commit edcc85814c ("convert: add filter.<driver>.process option", 2016-10-16)
	keeps the external process running and processes all commands

but it is integrated into the convert code. This patch series takes the code from convert.c and refactors it into a separate “sub-process” module so that we can centralize and reuse this logic in other areas. Once the code was refactored into sub-process, convert.c was updated to use the new module.

Ben Peart (3):
  pkt-line: add packet_write_list_gently()
  sub-process: refactor the filter process code into a reusable module
  convert: use new sub-process module for filter processes

 Documentation/technical/api-sub-process.txt |  55 ++++++++++
 Makefile                                    |   1 +
 convert.c                                   | 154 +++++-----------------------
 pkt-line.c                                  |  19 ++++
 pkt-line.h                                  |   1 +
 sub-process.c                               | 113 ++++++++++++++++++++
 sub-process.h                               |  46 +++++++++
 7 files changed, 259 insertions(+), 130 deletions(-)
 create mode 100644 Documentation/technical/api-sub-process.txt
 create mode 100644 sub-process.c
 create mode 100644 sub-process.h