diff options
Diffstat (limited to 'modules/pkgs/postcss-plugins/node-env.nix')
| -rw-r--r-- | modules/pkgs/postcss-plugins/node-env.nix | 349 |
1 files changed, 349 insertions, 0 deletions
diff --git a/modules/pkgs/postcss-plugins/node-env.nix b/modules/pkgs/postcss-plugins/node-env.nix new file mode 100644 index 0000000..356e78f --- /dev/null +++ b/modules/pkgs/postcss-plugins/node-env.nix @@ -0,0 +1,349 @@ +# This file originates from node2nix + +{stdenv, nodejs, python2, utillinux, runCommand, writeTextFile}: + +let + python = if nodejs ? python then nodejs.python else python2; + + # Create a tar wrapper that filters all the 'Ignoring unknown extended header keyword' noise + tarWrapper = runCommand "tarWrapper" {} '' + mkdir -p $out/bin + + cat > $out/bin/tar <<EOF + #! ${stdenv.shell} -e + $(type -p tar) "\$@" --warning=no-unknown-keyword + EOF + + chmod +x $out/bin/tar + ''; + + # Function that generates a TGZ file from a NPM project + buildNodeSourceDist = + { name, version, src, ... }: + + stdenv.mkDerivation { + name = "node-tarball-${name}-${version}"; + inherit src; + buildInputs = [ nodejs ]; + buildPhase = '' + export HOME=$TMPDIR + tgzFile=$(npm pack) + ''; + installPhase = '' + mkdir -p $out/tarballs + mv $tgzFile $out/tarballs + mkdir -p $out/nix-support + echo "file source-dist $out/tarballs/$tgzFile" >> $out/nix-support/hydra-build-products + ''; + }; + + includeDependencies = {dependencies}: + stdenv.lib.optionalString (dependencies != []) + (stdenv.lib.concatMapStrings (dependency: + '' + # Bundle the dependencies of the package + mkdir -p node_modules + cd node_modules + + # Only include dependencies if they don't exist. They may also be bundled in the package. + if [ ! -e "${dependency.name}" ] + then + ${composePackage dependency} + fi + + cd .. + '' + ) dependencies); + + # Recursively composes the dependencies of a package + composePackage = { name, packageName, src, dependencies ? [], ... }@args: + '' + DIR=$(pwd) + cd $TMPDIR + + unpackFile ${src} + + # Make the base dir in which the target dependency resides first + mkdir -p "$(dirname "$DIR/${packageName}")" + + if [ -f "${src}" ] + then + # Figure out what directory has been unpacked + packageDir="$(find . -maxdepth 1 -type d | tail -1)" + + # Restore write permissions to make building work + find "$packageDir" -type d -print0 | xargs -0 chmod u+x + chmod -R u+w "$packageDir" + + # Move the extracted tarball into the output folder + mv "$packageDir" "$DIR/${packageName}" + elif [ -d "${src}" ] + then + # Get a stripped name (without hash) of the source directory. + # On old nixpkgs it's already set internally. + if [ -z "$strippedName" ] + then + strippedName="$(stripHash ${src})" + fi + + # Restore write permissions to make building work + chmod -R u+w "$strippedName" + + # Move the extracted directory into the output folder + mv "$strippedName" "$DIR/${packageName}" + fi + + # Unset the stripped name to not confuse the next unpack step + unset strippedName + + # Include the dependencies of the package + cd "$DIR/${packageName}" + ${includeDependencies { inherit dependencies; }} + cd .. + ${stdenv.lib.optionalString (builtins.substring 0 1 packageName == "@") "cd .."} + ''; + + pinpointDependencies = {dependencies, production}: + let + pinpointDependenciesFromPackageJSON = writeTextFile { + name = "pinpointDependencies.js"; + text = '' + var fs = require('fs'); + var path = require('path'); + + function resolveDependencyVersion(location, name) { + if(location == process.env['NIX_STORE']) { + return null; + } else { + var dependencyPackageJSON = path.join(location, "node_modules", name, "package.json"); + + if(fs.existsSync(dependencyPackageJSON)) { + var dependencyPackageObj = JSON.parse(fs.readFileSync(dependencyPackageJSON)); + + if(dependencyPackageObj.name == name) { + return dependencyPackageObj.version; + } + } else { + return resolveDependencyVersion(path.resolve(location, ".."), name); + } + } + } + + function replaceDependencies(dependencies) { + if(typeof dependencies == "object" && dependencies !== null) { + for(var dependency in dependencies) { + var resolvedVersion = resolveDependencyVersion(process.cwd(), dependency); + + if(resolvedVersion === null) { + process.stderr.write("WARNING: cannot pinpoint dependency: "+dependency+", context: "+process.cwd()+"\n"); + } else { + dependencies[dependency] = resolvedVersion; + } + } + } + } + + /* Read the package.json configuration */ + var packageObj = JSON.parse(fs.readFileSync('./package.json')); + + /* Pinpoint all dependencies */ + replaceDependencies(packageObj.dependencies); + if(process.argv[2] == "development") { + replaceDependencies(packageObj.devDependencies); + } + replaceDependencies(packageObj.optionalDependencies); + + /* Write the fixed package.json file */ + fs.writeFileSync("package.json", JSON.stringify(packageObj, null, 2)); + ''; + }; + in + '' + node ${pinpointDependenciesFromPackageJSON} ${if production then "production" else "development"} + + ${stdenv.lib.optionalString (dependencies != []) + '' + if [ -d node_modules ] + then + cd node_modules + ${stdenv.lib.concatMapStrings (dependency: pinpointDependenciesOfPackage dependency) dependencies} + cd .. + fi + ''} + ''; + + # Recursively traverses all dependencies of a package and pinpoints all + # dependencies in the package.json file to the versions that are actually + # being used. + + pinpointDependenciesOfPackage = { packageName, dependencies ? [], production ? true, ... }@args: + '' + if [ -d "${packageName}" ] + then + cd "${packageName}" + ${pinpointDependencies { inherit dependencies production; }} + cd .. + ${stdenv.lib.optionalString (builtins.substring 0 1 packageName == "@") "cd .."} + fi + ''; + + # Extract the Node.js source code which is used to compile packages with + # native bindings + nodeSources = runCommand "node-sources" {} '' + tar --no-same-owner --no-same-permissions -xf ${nodejs.src} + mv node-* $out + ''; + + # Builds and composes an NPM package including all its dependencies + buildNodePackage = { name, packageName, version, dependencies ? [], production ? true, npmFlags ? "", dontNpmInstall ? false, preRebuild ? "", ... }@args: + + stdenv.lib.makeOverridable stdenv.mkDerivation (builtins.removeAttrs args [ "dependencies" ] // { + name = "node-${name}-${version}"; + buildInputs = [ tarWrapper python nodejs ] ++ stdenv.lib.optional (stdenv.isLinux) utillinux ++ args.buildInputs or []; + dontStrip = args.dontStrip or true; # Striping may fail a build for some package deployments + + inherit dontNpmInstall preRebuild; + + unpackPhase = args.unpackPhase or "true"; + + buildPhase = args.buildPhase or "true"; + + compositionScript = composePackage args; + pinpointDependenciesScript = pinpointDependenciesOfPackage args; + + passAsFile = [ "compositionScript" "pinpointDependenciesScript" ]; + + installPhase = args.installPhase or '' + # Create and enter a root node_modules/ folder + mkdir -p $out/lib/node_modules + cd $out/lib/node_modules + + # Compose the package and all its dependencies + source $compositionScriptPath + + # Pinpoint the versions of all dependencies to the ones that are actually being used + echo "pinpointing versions of dependencies..." + source $pinpointDependenciesScriptPath + + # Patch the shebangs of the bundled modules to prevent them from + # calling executables outside the Nix store as much as possible + patchShebangs . + + # Deploy the Node.js package by running npm install. Since the + # dependencies have been provided already by ourselves, it should not + # attempt to install them again, which is good, because we want to make + # it Nix's responsibility. If it needs to install any dependencies + # anyway (e.g. because the dependency parameters are + # incomplete/incorrect), it fails. + # + # The other responsibilities of NPM are kept -- version checks, build + # steps, postprocessing etc. + + export HOME=$TMPDIR + cd "${packageName}" + runHook preRebuild + npm --registry http://www.example.com --nodedir=${nodeSources} ${npmFlags} ${stdenv.lib.optionalString production "--production"} rebuild + + if [ "$dontNpmInstall" != "1" ] + then + # NPM tries to download packages even when they already exist if npm-shrinkwrap is used. + rm -f npm-shrinkwrap.json + + npm --registry http://www.example.com --nodedir=${nodeSources} ${npmFlags} ${stdenv.lib.optionalString production "--production"} install + fi + + # Create symlink to the deployed executable folder, if applicable + if [ -d "$out/lib/node_modules/.bin" ] + then + ln -s $out/lib/node_modules/.bin $out/bin + fi + + # Create symlinks to the deployed manual page folders, if applicable + if [ -d "$out/lib/node_modules/${packageName}/man" ] + then + mkdir -p $out/share + for dir in "$out/lib/node_modules/${packageName}/man/"* + do + mkdir -p $out/share/man/$(basename "$dir") + for page in "$dir"/* + do + ln -s $page $out/share/man/$(basename "$dir") + done + done + fi + + # Run post install hook, if provided + runHook postInstall + ''; + }); + + # Builds a development shell + buildNodeShell = { name, packageName, version, src, dependencies ? [], production ? true, npmFlags ? "", dontNpmInstall ? false, ... }@args: + let + nodeDependencies = stdenv.mkDerivation { + name = "node-dependencies-${name}-${version}"; + + buildInputs = [ tarWrapper python nodejs ] ++ stdenv.lib.optional (stdenv.isLinux) utillinux ++ args.buildInputs or []; + + includeScript = includeDependencies { inherit dependencies; }; + pinpointDependenciesScript = pinpointDependenciesOfPackage args; + + passAsFile = [ "includeScript" "pinpointDependenciesScript" ]; + + buildCommand = '' + mkdir -p $out/lib + cd $out/lib + source $includeScriptPath + + # Pinpoint the versions of all dependencies to the ones that are actually being used + echo "pinpointing versions of dependencies..." + source $pinpointDependenciesScriptPath + + # Create fake package.json to make the npm commands work properly + cat > package.json <<EOF + { + "name": "${packageName}", + "version": "${version}" + } + EOF + + # Patch the shebangs of the bundled modules to prevent them from + # calling executables outside the Nix store as much as possible + patchShebangs . + + export HOME=$PWD + npm --registry http://www.example.com --nodedir=${nodeSources} ${npmFlags} ${stdenv.lib.optionalString production "--production"} rebuild + + ${stdenv.lib.optionalString (!dontNpmInstall) '' + # NPM tries to download packages even when they already exist if npm-shrinkwrap is used. + rm -f npm-shrinkwrap.json + + npm --registry http://www.example.com --nodedir=${nodeSources} ${npmFlags} ${stdenv.lib.optionalString production "--production"} install + ''} + + ln -s $out/lib/node_modules/.bin $out/bin + ''; + }; + in + stdenv.lib.makeOverridable stdenv.mkDerivation { + name = "node-shell-${name}-${version}"; + + buildInputs = [ python nodejs ] ++ stdenv.lib.optional (stdenv.isLinux) utillinux ++ args.buildInputs or []; + buildCommand = '' + mkdir -p $out/bin + cat > $out/bin/shell <<EOF + #! ${stdenv.shell} -e + $shellHook + exec ${stdenv.shell} + EOF + chmod +x $out/bin/shell + ''; + + # Provide the dependencies in a development shell through the NODE_PATH environment variable + inherit nodeDependencies; + shellHook = stdenv.lib.optionalString (dependencies != []) '' + export NODE_PATH=$nodeDependencies/lib/node_modules + ''; + }; +in +{ inherit buildNodeSourceDist buildNodePackage buildNodeShell; } |