1 files changed, 93 insertions, 0 deletions
diff --git a/npmPackages/buildNpmPackage.nix b/npmPackages/buildNpmPackage.nix
new file mode 100644
index 0000000..c2d1af4
--- /dev/null
+++ b/npmPackages/buildNpmPackage.nix
@@ -0,0 +1,93 @@
+{stdenv, lib, nodejs, writeText}:
+
+{ pname
+, version
+, src
+, npmInputs ? [] # NPM packages used to resolve dependencies
+, buildInputs ? [] # Other build inputs
+, nativeBuildInputs ? []
+, patches ? []
+, files ? [] # override "files" in package.json
+, buildPhase ? "npm --if-present run build"
+, checkPhase ? "npm test"
+, doCheck ? true
+, jailbreak ? false # Ignore version constraints of the dependencies
+}:
+
+let
+
+  name = "nodejs-${nodejs.version}-${pname}-${version}";
+
+  scripts = "${./_scripts}";
+
+in
+stdenv.mkDerivation {
+  inherit
+    buildInputs buildPhase checkPhase doCheck name patches src
+    ;
+
+  outputs = [ "out" "pack" ];
+
+  nativeBuildInputs = nativeBuildInputs ++ [ nodejs ];
+
+  configurePhase = ''
+    export HOME=$PWD
+
+    cat << 'NPMRC' > $HOME/.npmrc
+      audit = false
+      heading = ${name}
+      loglevel = verbose
+      metrics-registry = http://localhost
+      offline = true
+      optional = false
+      package-lock = false
+      registry = http://localhost
+      save = false
+      script-shell = ${stdenv.shell}
+      send-metrics = false
+      update-notifier = false
+    NPMRC
+
+    node ${scripts}/resolve.js \
+      ${lib.optionalString jailbreak "--jailbreak"} \
+      ${toString npmInputs} < package.json > package.json.resolved
+    mv package.json.resolved package.json
+
+    npm --nodedir=${nodejs} --ignore-scripts install
+
+  '';
+
+  installPhase = ''
+    # remove things that are not needed any more or not needed with Nix:
+    node ${scripts}/strip.js < package.json > package.json.stripped
+    mv package.json.stripped package.json
+
+    ${lib.optionalString (files != []) ''
+      node ${scripts}/files.js ${lib.concatMapStringsSep " " (f: "'${f}'") files} < package.json > package.json.files
+      mv package.json.files package.json
+    ''}
+
+    cp package.json package.json.resolved
+
+    node ${scripts}/pindeps.js < package.json > package.json.pinned
+    mv package.json.pinned package.json
+
+    npm pack
+
+    mkdir -p $pack
+    cp ${pname}-${version}.tgz $pack/
+
+    mkdir -p $out
+    tar xf ${pname}-${version}.tgz --strip-components=1 -C $out
+    mv package.json.resolved $out/package.json
+
+    # Link runtime depdendencies, if any, to node_modules:
+    cd $out
+    npm install
+
+    # Finally, strip info about runtime dependencies,
+    # so that NPM will not complain about missed or extraneous dependencies:
+    node ${scripts}/strip.js --strip-dependencies < package.json > package.json.stripped
+    mv package.json.stripped package.json
+  '';
+}