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{ hello, buildIncremental, runCommandNoCC, texinfo, stdenv, rsync }:
let
baseHello = buildIncremental.prepareIncrementalBuild hello;
patchedHello = hello.overrideAttrs (old: {
buildInputs = [ texinfo ];
src = runCommandNoCC "patch-hello-src" { } ''
mkdir -p $out
cd $out
tar xf ${hello.src} --strip-components=1
patch -p1 < ${./hello.patch}
'';
});
incrementalBuiltHello = buildIncremental.mkIncrementalBuild patchedHello baseHello.incrementalBuildArtifacts;
incrementalBuiltHelloWithCheck = incrementalBuiltHello.overrideAttrs (old: {
doCheck = true;
checkPhase = ''
echo "checking if unchanged source file is not recompiled"
[ "$(stat --format="%Y" lib/exitfail.o)" = "$(stat --format="%Y" ${baseHello.incrementalBuildArtifacts}/lib/exitfail.o)" ]
'';
});
baseHelloRemoveFile = buildIncremental.prepareIncrementalBuild (hello.overrideAttrs (old: {
patches = [ ./hello-additionalFile.patch ];
}));
preparedHelloRemoveFileSrc = runCommandNoCC "patch-hello-src" { } ''
mkdir -p $out
cd $out
tar xf ${hello.src} --strip-components=1
patch -p1 < ${./hello-additionalFile.patch}
'';
patchedHelloRemoveFile = hello.overrideAttrs (old: {
buildInputs = [ texinfo ];
src = runCommandNoCC "patch-hello-src" { } ''
mkdir -p $out
cd $out
${rsync}/bin/rsync -cutU --chown=$USER:$USER --chmod=+w -r ${preparedHelloRemoveFileSrc}/* .
patch -p1 < ${./hello-removeFile.patch}
'';
});
incrementalBuiltHelloWithRemovedFile = buildIncremental.mkIncrementalBuild patchedHelloRemoveFile baseHelloRemoveFile.incrementalBuildArtifacts;
in
stdenv.mkDerivation {
name = "patched-hello-returns-correct-output";
buildCommand = ''
touch $out
echo "testing output of hello binary"
[ "$(${incrementalBuiltHelloWithCheck}/bin/hello)" = "Hello, incremental world!" ]
echo "testing output of hello with removed file"
[ "$(${incrementalBuiltHelloWithRemovedFile}/bin/hello)" = "Hello, incremental world!" ]
'';
}
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