[WIP,v2,0/2] Conditional config includes based on remote URL

Message

Jonathan Tan Oct. 29, 2021, 5:31 p.m. UTC

Here's a version that implements the URL lookahead. Compared to an
approach in which we rerun config in order to just get the remote URLs,
I think that the main benefit of this is that we don't read from disk
twice. One inelegant thing is that we now have essentially two caches of
config variables - the one in struct repository (struct config_set
*config) and the one newly introduced by this patch set. (Although I
think that many commands don't use the cache in struct repository,
instead just reading the config in one pass.)

(Of course, there is also the possibility that we should have the remote
repo administrator provide the config in another way.)

I have marked this WIP. This patch set is mostly done, except for the
following:
 - Prohibiting remote.?.url from any files included directly or
   indirectly by a URL-conditional include.
 - Checking that memory everywhere is freed when no longer needed.
 - Documentation (as mentioned in the NEEDSWORK comment in patch 2).
 - Tests that check what the glob matches and doesn't match.

No range-diff included because this version is substantially different.

Jonathan Tan (2):
  config: make git_config_include() static
  config: include file if remote URL matches a glob

 config.c          | 142 ++++++++++++++++++++++++++++++++++++++++++----
 config.h          |  37 ++----------
 t/t1300-config.sh |  60 ++++++++++++++++++++
 3 files changed, 194 insertions(+), 45 deletions(-)