From 44d115e5b8690fab144557197737714a009d656d Mon Sep 17 00:00:00 2001
From: Hristo Deshev <hristo@deshev.com>
Date: Fri, 4 Nov 2016 15:58:09 +0200
Subject: [PATCH] Keep track of prepared plugins and avoid unnecessary cleans.

---
 .../node-modules/node-modules-dest-copy.ts    | 59 +++++++++++++++--
 test/plugin-prepare.ts                        | 66 +++++++++++++++++++
 2 files changed, 120 insertions(+), 5 deletions(-)
 create mode 100644 test/plugin-prepare.ts

diff --git a/lib/tools/node-modules/node-modules-dest-copy.ts b/lib/tools/node-modules/node-modules-dest-copy.ts
index 897c2eebb5..a3dcbdf9dd 100644
--- a/lib/tools/node-modules/node-modules-dest-copy.ts
+++ b/lib/tools/node-modules/node-modules-dest-copy.ts
@@ -62,20 +62,69 @@ export class NpmPluginPrepare {
 	) {
 	}
 
+	protected beforePrepare(dependencies: IDictionary<IDependencyData>, platform: string): void {
+		this.$platformsData.getPlatformData(platform).platformProjectService.beforePrepareAllPlugins(dependencies).wait();
+	}
+
+	protected afterPrepare(dependencies: IDictionary<IDependencyData>, platform: string): void {
+		this.$platformsData.getPlatformData(platform).platformProjectService.afterPrepareAllPlugins().wait();
+		this.writePreparedDependencyInfo(dependencies, platform);
+	}
+
+	private writePreparedDependencyInfo(dependencies: IDictionary<IDependencyData>, platform: string): void {
+		let prepareData: IDictionary<boolean> = {};
+		_.values(dependencies).forEach(d => {
+			prepareData[d.name] = true;
+		});
+		this.$fs.createDirectory(this.preparedPlatformsDir(platform)).wait();
+		this.$fs.writeJson(this.preparedPlatformsFile(platform), prepareData, "    ", "utf8").wait();
+	}
+
+	private preparedPlatformsDir(platform: string): string {
+		const platformRoot = this.$platformsData.getPlatformData(platform).projectRoot;
+		if (/android/i.test(platform)) {
+			return path.join(platformRoot, "build", "intermediates");
+		} else if (/ios/i.test(platform)) {
+			return path.join(platformRoot, "build");
+		} else {
+			throw new Error("Invalid platform: " + platform);
+		}
+	}
+
+	private preparedPlatformsFile(platform: string): string {
+		return path.join(this.preparedPlatformsDir(platform), "prepared-platforms.json");
+	}
+
+	protected getPreviouslyPreparedDependencies(platform: string): IDictionary<boolean> {
+		if (!this.$fs.exists(this.preparedPlatformsFile(platform)).wait()) {
+			return {};
+		}
+		return this.$fs.readJson(this.preparedPlatformsFile(platform), "utf8").wait();
+	}
+
+	private allPrepared(dependencies: IDictionary<IDependencyData>, platform: string): boolean {
+		let result = true;
+		const previouslyPrepared = this.getPreviouslyPreparedDependencies(platform);
+		_.values(dependencies).forEach(d => {
+			if (!previouslyPrepared[d.name]) {
+				result = false;
+			}
+		});
+		return result;
+	}
+
 	public preparePlugins(dependencies: IDictionary<IDependencyData>, platform: string): void {
-		if (_.isEmpty(dependencies)) {
+		if (_.isEmpty(dependencies) || this.allPrepared(dependencies, platform)) {
 			return;
 		}
 
-		this.$platformsData.getPlatformData(platform).platformProjectService.beforePrepareAllPlugins(dependencies).wait();
-
+		this.beforePrepare(dependencies, platform);
 		_.each(dependencies, dependency => {
 			let isPlugin = !!dependency.nativescript;
 			if (isPlugin) {
-				console.log("preparing: " + dependency.name);
 				this.$pluginsService.prepare(dependency, platform).wait();
 			}
 		});
-		this.$platformsData.getPlatformData(platform).platformProjectService.afterPrepareAllPlugins().wait();
+		this.afterPrepare(dependencies, platform);
 	}
 }
diff --git a/test/plugin-prepare.ts b/test/plugin-prepare.ts
new file mode 100644
index 0000000000..5ca412cc36
--- /dev/null
+++ b/test/plugin-prepare.ts
@@ -0,0 +1,66 @@
+import {assert} from "chai";
+import {NpmPluginPrepare} from "../lib/tools/node-modules/node-modules-dest-copy";
+
+require("should");
+
+class TestNpmPluginPrepare extends NpmPluginPrepare {
+	public preparedDependencies: IDictionary<boolean> = {};
+
+	constructor(private previouslyPrepared: IDictionary<boolean>) {
+		super(null, null, null);
+	}
+
+	protected getPreviouslyPreparedDependencies(platform: string): IDictionary<boolean> {
+		return this.previouslyPrepared;
+	}
+
+	protected beforePrepare(dependencies: IDictionary<IDependencyData>, platform: string): void {
+		_.values(dependencies).forEach(d => {
+			this.preparedDependencies[d.name] = true;
+		});
+	}
+
+	protected afterPrepare(dependencies: IDictionary<IDependencyData>, platform: string): void {
+		// DO NOTHING
+	}
+}
+
+describe("Plugin preparation", () => {
+	it("skips prepare if no plugins", () => {
+		const pluginPrepare = new TestNpmPluginPrepare({});
+		pluginPrepare.preparePlugins({}, "android");
+		assert.deepEqual({}, pluginPrepare.preparedDependencies);
+	});
+
+	it("skips prepare if every plugin prepared", () => {
+		const pluginPrepare = new TestNpmPluginPrepare({"tns-core-modules-widgets": true});
+		const testDependencies: IDictionary<IDependencyData> = {
+			"0": {
+				name: "tns-core-modules-widgets",
+				version: "1.0.0",
+				nativescript: null,
+			}
+		};
+		pluginPrepare.preparePlugins(testDependencies, "android");
+		assert.deepEqual({}, pluginPrepare.preparedDependencies);
+	});
+
+	it("saves prepared plugins after preparation", () => {
+		const pluginPrepare = new TestNpmPluginPrepare({"tns-core-modules-widgets": true});
+		const testDependencies: IDictionary<IDependencyData> = {
+			"0": {
+				name: "tns-core-modules-widgets",
+				version: "1.0.0",
+				nativescript: null,
+			},
+			"1": {
+				name: "nativescript-calendar",
+				version: "1.0.0",
+				nativescript: null,
+			}
+		};
+		pluginPrepare.preparePlugins(testDependencies, "android");
+		const prepareData = {"tns-core-modules-widgets": true, "nativescript-calendar": true};
+		assert.deepEqual(prepareData, pluginPrepare.preparedDependencies);
+	});
+});