88dfade94b
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.
82 lines
2.0 KiB
Nix
82 lines
2.0 KiB
Nix
{
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stdenv,
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lib,
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buildPythonPackage,
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pythonOlder,
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isPyPy,
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fetchPypi,
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libpq,
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postgresql,
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postgresqlTestHook,
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openssl,
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sphinxHook,
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sphinx-better-theme,
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buildPackages,
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}:
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buildPythonPackage rec {
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pname = "psycopg2";
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version = "2.9.10";
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format = "setuptools";
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# Extension modules don't work well with PyPy. Use psycopg2cffi instead.
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# c.f. https://github.com/NixOS/nixpkgs/pull/104151#issuecomment-729750892
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disabled = pythonOlder "3.6" || isPyPy;
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outputs = [
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"out"
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"doc"
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];
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src = fetchPypi {
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inherit pname version;
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hash = "sha256-EuwLQLAnP5UpYjPodQRBM5KY5qVy9wOdpbJg48i2DhE=";
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};
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postPatch = ''
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# Preferably upstream would not depend on pg_config because config scripts are incompatible with cross-compilation, however postgresql's pc file is lacking information.
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# some linker flags are added but the linker ignores them because they're incompatible
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# https://github.com/psycopg/psycopg2/blob/89005ac5b849c6428c05660b23c5a266c96e677d/setup.py
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substituteInPlace setup.py \
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--replace-fail "self.pg_config_exe = self.build_ext.pg_config" 'self.pg_config_exe = "${libpq.pg_config}/bin/pg_config"'
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'';
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nativeBuildInputs = [
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sphinxHook
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sphinx-better-theme
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];
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buildInputs = [ libpq ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ openssl ];
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sphinxRoot = "doc/src";
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# test suite breaks at some point with:
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# current transaction is aborted, commands ignored until end of transaction block
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doCheck = false;
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nativeCheckInputs = [
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postgresql
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postgresqlTestHook
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];
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env = {
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PGDATABASE = "psycopg2_test";
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};
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pythonImportsCheck = [ "psycopg2" ];
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disallowedReferences = lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [
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buildPackages.libpq
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];
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meta = with lib; {
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description = "PostgreSQL database adapter for the Python programming language";
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homepage = "https://www.psycopg.org";
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license = with licenses; [
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lgpl3Plus
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zpl20
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];
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maintainers = [ ];
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};
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}
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