Robert Vollmert
90eaaefe12
This version of hasql-pool is a simplified rewrite that doesn't use the resource-pool package. The major API changes are that idle connections are no longer timed out (and the corresponding setting is gone), and that `release` makes the pool unusable, where it used to remain usable and only flushed idle connections. We depend on a PostgREST fork of 0.7.2 that gives us reliable flushing, compare https://github.com/PostgREST/hasql-pool/pull/1 - hasql-pool 0.7 removes timing out of idle connections, so this change removes the db-pool-timeout option. Given that we were typically running with very high timeout settings, I don't anticipate the lack of timeout to introduce new issues, though we might want to consider introducing some retry-logic down the line when we encounter connection failures. - See https://github.com/PostgREST/postgrest/issues/2422 for a discussion on depending on a forked dependency. Besides adding the dependency to the nix overlay, we're also adding it to stack.yaml and a new cabal.project to allow stack/cabal users to build the project.
55 lines
1.6 KiB
Nix
55 lines
1.6 KiB
Nix
{ compiler, extraOverrides ? (final: prev: { }) }:
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self: super:
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let
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inherit (self.haskell) lib;
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overrides =
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final: prev:
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rec {
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# To pin custom versions of Haskell packages:
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# protolude =
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# prev.callHackageDirect
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# {
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# pkg = "protolude";
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# ver = "0.3.0";
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# sha256 = "0iwh4wsjhb7pms88lw1afhdal9f86nrrkkvv65f9wxbd1b159n72";
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# }
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# { };
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#
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# To get the sha256:
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# nix-prefetch-url --unpack https://hackage.haskell.org/package/protolude-0.3.0/protolude-0.3.0.tar.gz
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# To temporarily pin unreleased versions from GitHub:
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# <name> =
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# prev.callCabal2nixWithOptions "<name>" (super.fetchFromGitHub {
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# owner = "<owner>";
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# repo = "<repo>";
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# rev = "<commit>";
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# sha256 = "<sha256>";
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# }) "--subpath=<subpath>" {};
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#
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# To get the sha256:
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# nix-prefetch-url --unpack https://github.com/<owner>/<repo>/archive/<commit>.tar.gz
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hasql-pool = lib.dontCheck (
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prev.callCabal2nix "hasql-pool"
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(super.fetchFromGitHub {
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owner = "PostgREST";
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repo = "hasql-pool";
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rev = "4d462c4d47d762effefc7de6c85eaed55f144f1d"; # master as of 2022-08-26
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sha256 = "sha256-UwX1PynimrQHm1KCs4BQXMwYYY3h4T5UAkgtEJ0EZQQ=";
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})
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{ });
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} // extraOverrides final prev;
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in
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{
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haskell =
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super.haskell // {
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packages = super.haskell.packages // {
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"${compiler}" =
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super.haskell.packages."${compiler}".override { inherit overrides; };
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};
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};
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}
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