From 4eaea26c3dddba80ef6d783fccc9ca35e6fcf153 Mon Sep 17 00:00:00 2001
From: Igor Pashev <pashev.igor@gmail.com>
Date: Sun, 13 Oct 2019 13:16:17 +0200
Subject: Allow drop some dev. dependencies

---
 npmPackages/_scripts/drop-dev-deps.js | 25 +++++++++++++++++++++++++
 npmPackages/buildNpmPackage.nix       |  7 +++++++
 2 files changed, 32 insertions(+)
 create mode 100644 npmPackages/_scripts/drop-dev-deps.js

diff --git a/npmPackages/_scripts/drop-dev-deps.js b/npmPackages/_scripts/drop-dev-deps.js
new file mode 100644
index 0000000..bc8c2f6
--- /dev/null
+++ b/npmPackages/_scripts/drop-dev-deps.js
@@ -0,0 +1,25 @@
+const process = require('process');
+
+const {
+    pipeThrough
+} = require('./package.js');
+
+pipeThrough((pkg, done) => {
+    var notFound = [];
+    pkg.devDependencies = pkg.devDependencies || {};
+
+    process.argv.slice(2).forEach((d) => {
+        if (pkg.devDependencies[d]) {
+            delete pkg.devDependencies[d];
+        } else {
+            notFound.push(d);
+        }
+    });
+
+    if (notFound.length > 0) {
+        console.error(`** ERROR: these dev. dependencies are not declared: ${notFound}`);
+        process.exit(1);
+    }
+
+    done(pkg);
+});
diff --git a/npmPackages/buildNpmPackage.nix b/npmPackages/buildNpmPackage.nix
index 5a0f4e5..76f08ee 100644
--- a/npmPackages/buildNpmPackage.nix
+++ b/npmPackages/buildNpmPackage.nix
@@ -4,6 +4,7 @@
 , version
 , src
 , npmInputs ? [] # NPM packages used to resolve dependencies
+, dropDevDependencies ? []
 , buildInputs ? [] # Other build inputs
 , nativeBuildInputs ? []
 , patches ? []
@@ -50,6 +51,12 @@ stdenv.mkDerivation {
       update-notifier = false
     NPMRC
 
+    ${lib.optionalString (dropDevDependencies != []) ''
+      node ${scripts}/drop-dev-deps.js ${lib.concatMapStringsSep " " (f: "'${f}'") dropDevDependencies} \
+      < package.json > package.json.devdeps
+      mv package.json.devdeps package.json
+    ''}
+
     node ${scripts}/resolve.js \
       ${lib.optionalString jailbreak "--jailbreak"} \
       ${toString npmInputs} < package.json > package.json.resolved
-- 
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