This is basically the equivalent of #112500 for Go: Compiling non-Go packages that include Go code (possibly in a vendored subproject) that use vendored Go modules that we need to fetch using go mod vendor. An example (that prompted me to create this issue) can be seen in #124992.
It would be nice if we had a function like this for Go:
cargoDeps = rustPlatform.fetchCargoTarball {
inherit src;
sourceRoot = "...";
name = "${pname}-${version}";
hash = "...";
};
The current code for the fixed-output derivation that fetches vendored Go modules:
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go-modules = if vendorSha256 != null then stdenv.mkDerivation (let modArgs = { |
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name = "${name}-go-modules"; |
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nativeBuildInputs = (args.nativeBuildInputs or []) ++ [ go git cacert ]; |
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inherit (args) src; |
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inherit (go) GOOS GOARCH; |
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patches = args.patches or []; |
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preBuild = args.preBuild or ""; |
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sourceRoot = args.sourceRoot or ""; |
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GO111MODULE = "on"; |
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impureEnvVars = lib.fetchers.proxyImpureEnvVars ++ [ |
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"GIT_PROXY_COMMAND" "SOCKS_SERVER" |
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]; |
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configurePhase = args.modConfigurePhase or '' |
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runHook preConfigure |
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export GOCACHE=$TMPDIR/go-cache |
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export GOPATH="$TMPDIR/go" |
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cd "${modRoot}" |
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runHook postConfigure |
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''; |
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buildPhase = args.modBuildPhase or '' |
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runHook preBuild |
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'' + lib.optionalString (deleteVendor == true) '' |
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if [ ! -d vendor ]; then |
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echo "vendor folder does not exist, 'deleteVendor' is not needed" |
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exit 10 |
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else |
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rm -rf vendor |
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fi |
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'' + '' |
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if [ -d vendor ]; then |
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echo "vendor folder exists, please set 'vendorSha256 = null;' in your expression" |
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exit 10 |
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fi |
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${if runVend then '' |
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echo "running 'vend' to rewrite vendor folder" |
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${vend}/bin/vend |
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'' else '' |
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go mod vendor |
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''} |
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mkdir -p vendor |
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runHook postBuild |
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''; |
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installPhase = args.modInstallPhase or '' |
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runHook preInstall |
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# remove cached lookup results and tiles |
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cp -r --reflink=auto vendor $out |
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runHook postInstall |
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''; |
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dontFixup = true; |
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}; in modArgs // ( |
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{ |
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outputHashMode = "recursive"; |
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outputHashAlgo = "sha256"; |
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outputHash = vendorSha256; |
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} |
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) // overrideModAttrs modArgs) else ""; |
I'm not familiar with Go or our Nixpkgs abstractions for it but it seems that if we convert go-modules into a function than we should be able to use it outside of buildGoModule and use something like this:
rm -rf $vendor
cp -r --reflink=auto ${go-modules} $vendor
