From 723de72f935bdfeef5d9786cd77be809c3fbc6fa Mon Sep 17 00:00:00 2001
From: Mariusz Nowak <mariusz@medikoo.com>
Date: Mon, 9 Dec 2019 14:05:55 +0100
Subject: [PATCH] feat: Install dev dependencies only for top package or on
 update all

---
 lib/private/setup-dependencies/index.js | 42 +++++++++++++++++++------
 1 file changed, 32 insertions(+), 10 deletions(-)

diff --git a/lib/private/setup-dependencies/index.js b/lib/private/setup-dependencies/index.js
index c5fc8f4..52fad3c 100644
--- a/lib/private/setup-dependencies/index.js
+++ b/lib/private/setup-dependencies/index.js
@@ -4,6 +4,9 @@ const log               = require("log").get("npm-cross-link")
     , getPackageJson    = require("../../get-package-json")
     , processDependency = require("./process-dependency");
 
+const prodRejectModes = new Set(["dev", "optional"]);
+const devRejectModes = new Set(["prod", "optional"]);
+
 const setupRequiredDependencies = async (
 	packageContext,
 	userConfiguration,
@@ -11,16 +14,32 @@ const setupRequiredDependencies = async (
 	progressData
 ) => {
 	const { name, packageJson } = packageContext;
-	const dependencies = (packageContext.dependencies = new Set(
-		Object.keys(packageJson.dependencies || {}).concat(
-			Object.keys(packageJson.devDependencies || {})
-		)
-	));
-	dependencies.delete(name);
-	if (!dependencies.size) return;
+	const { installMode } = inputOptions;
+	const { topPackageName } = progressData;
+	const prodDependencies = new Set(Object.keys(packageJson.dependencies || {}));
+	prodDependencies.delete(name);
+	const devDependencies = new Set(Object.keys(packageJson.devDependencies || {}));
+	devDependencies.delete(name);
+	for (const dependencyName of prodDependencies) devDependencies.delete(dependencyName);
+	packageContext.dependencies = new Set([...prodDependencies, ...devDependencies]);
+	if (!packageContext.dependencies.size) return;
+
+	if (
+		prodDependencies.size &&
+		(!topPackageName || topPackageName !== name || !prodRejectModes.has(installMode))
+	) {
+		log.debug("for %s setup prod dependencies %o", name, prodDependencies);
+		for (const dependencyName of prodDependencies) {
+			await processDependency(
+				packageContext, dependencyName, userConfiguration, inputOptions, progressData
+			);
+		}
+	}
 
-	log.debug("for %s setup required dependencies %o", name, dependencies);
-	for (const dependencyName of dependencies) {
+	if (!devDependencies.size) return;
+	if (topPackageName && (topPackageName !== name || devRejectModes.has(installMode))) return;
+	log.debug("for %s setup dev dependencies %o", name, devDependencies);
+	for (const dependencyName of devDependencies) {
 		await processDependency(
 			packageContext, dependencyName, userConfiguration, inputOptions, progressData
 		);
@@ -34,6 +53,8 @@ const setupOptionalDependencies = async (
 	progressData
 ) => {
 	const { dependencies, name, packageJson } = packageContext;
+	const { installMode } = inputOptions;
+	const { topPackageName } = progressData;
 
 	const optionalDependencies = new Set(
 		Object.keys(packageJson.optionalDependencies || {}).filter(
@@ -43,7 +64,8 @@ const setupOptionalDependencies = async (
 	if (!optionalDependencies.size) return;
 	for (const dependencyName of optionalDependencies) dependencies.add(dependencyName);
 
-	log.info("for %s setup optional dependencies %o", name, dependencies);
+	if (topPackageName === name && installMode === "dev") return;
+	log.info("for %s setup optional dependencies %o", name, optionalDependencies);
 	for (const dependencyName of optionalDependencies) {
 		await processDependency(
 			packageContext, dependencyName, userConfiguration, inputOptions, progressData, true