nixpkgs/pkgs/development/tools/scalafmt/default.nix

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{ stdenv, jdk, jre, coursier, makeWrapper }:
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let
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baseName = "scalafmt";
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version = "2.6.4";
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deps = stdenv.mkDerivation {
name = "${baseName}-deps-${version}";
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buildCommand = ''
export COURSIER_CACHE=$(pwd)
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${coursier}/bin/coursier fetch org.scalameta:scalafmt-cli_2.12:${version} > deps
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mkdir -p $out/share/java
cp $(< deps) $out/share/java/
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'';
outputHashMode = "recursive";
outputHashAlgo = "sha256";
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outputHash = "1h19rsxsn2piifillv29nwks2k9l391jwygjbfy8pc0ha8yi63mw";
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};
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in
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stdenv.mkDerivation {
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name = "${baseName}-${version}";
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nativeBuildInputs = [ makeWrapper ];
buildInputs = [ jdk deps ];
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doCheck = true;
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phases = [ "installPhase" "checkPhase" ];
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installPhase = ''
makeWrapper ${jre}/bin/java $out/bin/${baseName} \
--add-flags "-cp $CLASSPATH org.scalafmt.cli.Cli"
'';
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checkPhase = ''
$out/bin/${baseName} --version | grep -q "${version}"
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'';
meta = with stdenv.lib; {
description = "Opinionated code formatter for Scala";
homepage = "http://scalameta.org/scalafmt";
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license = licenses.asl20;
maintainers = [ maintainers.markus1189 ];
};
}