By replacing upstream's pg_config binary with a shell script, we:
- gain the ability to run pg_config easily when cross-compiling,
- can remove the fake pg_config in the default output,
- can remove the pg_config wrapper script dealing with special cases.
Some 20 years ago, pg_config *was* a shell script upstream, too. It was
changed to a binary, when it was made "relocatable", so it would return
paths depending on the location of the "postgres" binary. However, this
is exactly the thing that just hurts us in nixpkgs - we don't want those
paths to change, we want them to always point at the right outputs. By
writing the script ourselves, this becomes a lot less painful.
This approach means more lines of codes, but all of them are dead simple
and we have a lot less complexity overall.
Additionally, pg_config is now made a separate derivation, only exposed
as "postgresql.pg_config". This has the nice side-effect, that all users
of postgresql and libpq in nixpkgs must be very *explicit* about their
dependency on pg_config. This gives a lot more visibility into the state
of affairs regarding pkg-config support for libpq, which ultimately is
the much better solution.
After final improvements to the official formatter implementation,
this commit now performs the first treewide reformat of Nix files using it.
This is part of the implementation of RFC 166.
Only "inactive" files are reformatted, meaning only files that
aren't being touched by any PR with activity in the past 2 months.
This is to avoid conflicts for PRs that might soon be merged.
Later we can do a full treewide reformat to get the rest,
which should not cause as many conflicts.
A CI check has already been running for some time to ensure that new and
already-formatted files are formatted, so the files being reformatted here
should also stay formatted.
This commit was automatically created and can be verified using
nix-build https://github.com/infinisil/treewide-nixpkgs-reformat-script/archive/a08b3a4d199c6124ac5b36a889d9099b4383463f.tar.gz \
--argstr baseRev 57b193d8dd
result/bin/apply-formatting $NIXPKGS_PATH
Karl Hallsby