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nixpkgs/pkgs/development/node-packages/node-env.nix

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# 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
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cat > $out/bin/tar <<EOF
#! ${stdenv.shell} -e
$(type -p tar) "\$@" --warning=no-unknown-keyword
EOF
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chmod +x $out/bin/tar
'';
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# Function that generates a TGZ file from a NPM project
buildNodeSourceDist =
{ name, version, src, ... }:
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stdenv.mkDerivation {
name = "node-tarball-${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" >> $out/nix-support/hydra-build-products
'';
};
includeDependencies = {dependencies}:
stdenv.lib.optionalString (dependencies != [])
(stdenv.lib.concatMapStrings (dependency:
''
# Bundle the dependencies of the package
mkdir -p node_modules
cd node_modules
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# Only include dependencies if they don't exist. They may also be bundled in the package.
if [ ! -e "${dependency.name}" ]
then
${composePackage dependency}
fi
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cd ..
''
) dependencies);
# Recursively composes the dependencies of a package
composePackage = { name, packageName, src, dependencies ? [], ... }@args:
''
DIR=$(pwd)
cd $TMPDIR
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unpackFile ${src}
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# Make the base dir in which the target dependency resides first
mkdir -p "$(dirname "$DIR/${packageName}")"
if [ -f "${src}" ]
then
# Figure out what directory has been unpacked
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packageDir="$(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"
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# Move the extracted tarball into the output folder
mv "$packageDir" "$DIR/${packageName}"
elif [ -d "${src}" ]
then
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# Get a stripped name (without hash) of the source directory.
# On old nixpkgs it's already set internally.
if [ -z "$strippedName" ]
then
strippedName="$(stripHash ${src})"
fi
# Restore write permissions to make building work
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chmod -R u+w "$strippedName"
# Move the extracted directory into the output folder
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mv "$strippedName" "$DIR/${packageName}"
fi
# Unset the stripped name to not confuse the next unpack step
unset strippedName
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# Include the dependencies of the package
cd "$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-* $out
'';
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# Builds and composes an NPM package including all its dependencies
buildNodePackage = { name, packageName, version, dependencies ? [], production ? true, npmFlags ? "", dontNpmInstall ? false, preRebuild ? "", ... }@args:
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stdenv.lib.makeOverridable stdenv.mkDerivation (builtins.removeAttrs args [ "dependencies" ] // {
name = "node-${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
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inherit dontNpmInstall preRebuild;
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unpackPhase = args.unpackPhase or "true";
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buildPhase = args.buildPhase or "true";
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compositionScript = composePackage args;
pinpointDependenciesScript = pinpointDependenciesOfPackage args;
passAsFile = [ "compositionScript" "pinpointDependenciesScript" ];
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installPhase = args.installPhase or ''
# Create and enter a root node_modules/ folder
mkdir -p $out/lib/node_modules
cd $out/lib/node_modules
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# 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 $pinpointDependenciesScriptPath
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# Patch the shebangs of the bundled modules to prevent them from
# calling executables outside the Nix store as much as possible
patchShebangs .
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# Deploy the Node.js package by running npm install. Since the
# dependencies have been provided already by ourselves, it should not
# attempt to install them again, which is good, because we want to make
# it Nix's responsibility. If it needs to install any dependencies
# anyway (e.g. because the dependency parameters are
# incomplete/incorrect), it fails.
#
# The other responsibilities of NPM are kept -- version checks, build
# steps, postprocessing etc.
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export HOME=$TMPDIR
cd "${packageName}"
runHook preRebuild
npm --registry http://www.example.com --nodedir=${nodeSources} ${npmFlags} ${stdenv.lib.optionalString production "--production"} rebuild
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if [ "$dontNpmInstall" != "1" ]
then
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# 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} ${stdenv.lib.optionalString production "--production"} install
fi
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# Create symlink to the deployed executable folder, if applicable
if [ -d "$out/lib/node_modules/.bin" ]
then
ln -s $out/lib/node_modules/.bin $out/bin
fi
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# Create symlinks to the deployed manual page folders, if applicable
if [ -d "$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 "$dir")
done
done
fi
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# Run post install hook, if provided
runHook postInstall
'';
});
# Builds a development shell
buildNodeShell = { name, packageName, version, src, dependencies ? [], production ? true, npmFlags ? "", dontNpmInstall ? false, ... }@args:
let
nodeDependencies = stdenv.mkDerivation {
name = "node-dependencies-${name}-${version}";
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buildInputs = [ tarWrapper python nodejs ] ++ stdenv.lib.optional (stdenv.isLinux) utillinux ++ args.buildInputs or [];
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includeScript = includeDependencies { inherit dependencies; };
pinpointDependenciesScript = pinpointDependenciesOfPackage args;
passAsFile = [ "includeScript" "pinpointDependenciesScript" ];
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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 $pinpointDependenciesScriptPath
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# Create fake package.json to make the npm commands work properly
cat > package.json <<EOF
{
"name": "${packageName}",
"version": "${version}"
}
EOF
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# Patch the shebangs of the bundled modules to prevent them from
# calling executables outside the Nix store as much as possible
patchShebangs .
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export HOME=$PWD
npm --registry http://www.example.com --nodedir=${nodeSources} ${npmFlags} ${stdenv.lib.optionalString production "--production"} rebuild
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${stdenv.lib.optionalString (!dontNpmInstall) ''
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# 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}";
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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 $out/bin/shell
'';
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# Provide the dependencies in a development shell through the NODE_PATH environment variable
inherit nodeDependencies;
shellHook = stdenv.lib.optionalString (dependencies != []) ''
export NODE_PATH=$nodeDependencies/lib/node_modules
'';
};
in
{ inherit buildNodeSourceDist buildNodePackage buildNodeShell; }