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nixpkgs/pkgs/development/go-packages/generic/default.nix
Matthew Bauer 1f46aaab1b buildGoPackage: keep string context (#63680)
In Nix, each string has a context that it carries of where it
originated. Some functions like filterAttrs modify the context of its
args when doing comparisons. That is important because we use the
string context of “name” to get where a derivation was defined. This
causes some builtins like unsafeGetAttrPos to report incorrectly that
the string was set in lib/attrsets.nix and reporting that as the
source file. Using removeAttrs avoids this problem.

Fixes #63679
2019-06-22 19:07:26 -07:00

246 lines
7 KiB
Nix

{ go, govers, lib, fetchgit, fetchhg, fetchbzr, rsync
, removeReferencesTo, fetchFromGitHub, stdenv }:
{ buildInputs ? []
, nativeBuildInputs ? []
, passthru ? {}
, preFixup ? ""
, shellHook ? ""
# We want parallel builds by default
, enableParallelBuilding ? true
# Disabled flag
, disabled ? false
# Go import path of the package
, goPackagePath
# Go package aliases
, goPackageAliases ? [ ]
# Extra sources to include in the gopath
, extraSrcs ? [ ]
# Extra gopaths containing src subfolder
# with sources to include in the gopath
, extraSrcPaths ? [ ]
# go2nix dependency file
, goDeps ? null
, dontRenameImports ? false
# Do not enable this without good reason
# IE: programs coupled with the compiler
, allowGoReference ? false
, meta ? {}, ... } @ args:
with builtins;
let
removeReferences = [ ] ++ lib.optional (!allowGoReference) go;
removeExpr = refs: ''remove-references-to ${lib.concatMapStrings (ref: " -t ${ref}") refs}'';
dep2src = goDep:
{
inherit (goDep) goPackagePath;
src = if goDep.fetch.type == "git" then
fetchgit {
inherit (goDep.fetch) url rev sha256;
}
else if goDep.fetch.type == "hg" then
fetchhg {
inherit (goDep.fetch) url rev sha256;
}
else if goDep.fetch.type == "bzr" then
fetchbzr {
inherit (goDep.fetch) url rev sha256;
}
else if goDep.fetch.type == "FromGitHub" then
fetchFromGitHub {
inherit (goDep.fetch) owner repo rev sha256;
}
else abort "Unrecognized package fetch type: ${goDep.fetch.type}";
};
importGodeps = { depsFile }:
map dep2src (import depsFile);
goPath = if goDeps != null then importGodeps { depsFile = goDeps; } ++ extraSrcs
else extraSrcs;
package = go.stdenv.mkDerivation (
(builtins.removeAttrs args [ "goPackageAliases" "disabled" "extraSrcs"]) // {
nativeBuildInputs = [ removeReferencesTo go ]
++ (lib.optional (!dontRenameImports) govers) ++ nativeBuildInputs;
buildInputs = buildInputs;
inherit (go) GOOS GOARCH;
configurePhase = args.configurePhase or ''
runHook preConfigure
# Extract the source
cd "$NIX_BUILD_TOP"
mkdir -p "go/src/$(dirname "$goPackagePath")"
mv "$sourceRoot" "go/src/$goPackagePath"
'' + lib.flip lib.concatMapStrings goPath ({ src, goPackagePath }: ''
mkdir goPath
(cd goPath; unpackFile "${src}")
mkdir -p "go/src/$(dirname "${goPackagePath}")"
chmod -R u+w goPath/*
mv goPath/* "go/src/${goPackagePath}"
rmdir goPath
'') + (lib.optionalString (extraSrcPaths != []) ''
${rsync}/bin/rsync -a ${lib.concatMapStringsSep " " (p: "${p}/src") extraSrcPaths} go
'') + ''
export GOPATH=$NIX_BUILD_TOP/go:$GOPATH
export GOCACHE=$TMPDIR/go-cache
runHook postConfigure
'';
renameImports = args.renameImports or (
let
inputsWithAliases = lib.filter (x: x ? goPackageAliases)
(buildInputs ++ (args.propagatedBuildInputs or [ ]));
rename = to: from: "echo Renaming '${from}' to '${to}'; govers -d -m ${from} ${to}";
renames = p: lib.concatMapStringsSep "\n" (rename p.goPackagePath) p.goPackageAliases;
in lib.concatMapStringsSep "\n" renames inputsWithAliases);
buildPhase = args.buildPhase or ''
runHook preBuild
runHook renameImports
buildGoDir() {
local d; local cmd;
cmd="$1"
d="$2"
. $TMPDIR/buildFlagsArray
echo "$d" | grep -q "\(/_\|examples\|Godeps\)" && return 0
[ -n "$excludedPackages" ] && echo "$d" | grep -q "$excludedPackages" && return 0
local OUT
if ! OUT="$(go $cmd $buildFlags "''${buildFlagsArray[@]}" -v -p $NIX_BUILD_CORES $d 2>&1)"; then
if ! echo "$OUT" | grep -qE '(no( buildable| non-test)?|build constraints exclude all) Go (source )?files'; then
echo "$OUT" >&2
return 1
fi
fi
if [ -n "$OUT" ]; then
echo "$OUT" >&2
fi
return 0
}
getGoDirs() {
local type;
type="$1"
if [ -n "$subPackages" ]; then
echo "$subPackages" | sed "s,\(^\| \),\1$goPackagePath/,g"
else
pushd "$NIX_BUILD_TOP/go/src" >/dev/null
find "$goPackagePath" -type f -name \*$type.go -exec dirname {} \; | grep -v "/vendor/" | sort | uniq
popd >/dev/null
fi
}
if (( "''${NIX_DEBUG:-0}" >= 1 )); then
buildFlagsArray+=(-x)
fi
if [ ''${#buildFlagsArray[@]} -ne 0 ]; then
declare -p buildFlagsArray > $TMPDIR/buildFlagsArray
else
touch $TMPDIR/buildFlagsArray
fi
if [ -z "$enableParallelBuilding" ]; then
export NIX_BUILD_CORES=1
fi
for pkg in $(getGoDirs ""); do
buildGoDir install "$pkg"
done
'' + lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) ''
# normalize cross-compiled builds w.r.t. native builds
(
dir=$NIX_BUILD_TOP/go/bin/${go.GOOS}_${go.GOARCH}
if [[ -n "$(shopt -s nullglob; echo $dir/*)" ]]; then
mv $dir/* $dir/..
fi
if [[ -d $dir ]]; then
rmdir $dir
fi
)
'' + ''
runHook postBuild
'';
doCheck = args.doCheck or false;
checkPhase = args.checkPhase or ''
runHook preCheck
for pkg in $(getGoDirs test); do
buildGoDir test "$pkg"
done
runHook postCheck
'';
installPhase = args.installPhase or ''
runHook preInstall
mkdir -p $bin
dir="$NIX_BUILD_TOP/go/bin"
[ -e "$dir" ] && cp -r $dir $bin
runHook postInstall
'';
preFixup = preFixup + ''
find $bin/bin -type f -exec ${removeExpr removeReferences} '{}' + || true
'';
shellHook = ''
d=$(mktemp -d "--suffix=-$name")
'' + toString (map (dep: ''
mkdir -p "$d/src/$(dirname "${dep.goPackagePath}")"
ln -s "${dep.src}" "$d/src/${dep.goPackagePath}"
''
) goPath) + ''
export GOPATH=${lib.concatStringsSep ":" ( ["$d"] ++ ["$GOPATH"] ++ ["$PWD"] ++ extraSrcPaths)}
'' + shellHook;
disallowedReferences = lib.optional (!allowGoReference) go
++ lib.optional (!dontRenameImports) govers;
passthru = passthru //
{ inherit go; } //
lib.optionalAttrs (goPackageAliases != []) { inherit goPackageAliases; };
enableParallelBuilding = enableParallelBuilding;
# I prefer to call this dev but propagatedBuildInputs expects $out to exist
outputs = args.outputs or [ "bin" "out" ];
meta = {
# Add default meta information
homepage = "https://${goPackagePath}";
platforms = go.meta.platforms or lib.platforms.all;
} // meta // {
# add an extra maintainer to every package
maintainers = (meta.maintainers or []) ++
[ lib.maintainers.ehmry lib.maintainers.lethalman ];
};
});
in if disabled then
throw "${package.name} not supported for go ${go.meta.branch}"
else
package