[rush] Add support for an --ignore-engines runtime flag

apps/rush-lib/src/cli/RushCommandLineParser.ts

@@ -39,6 +39,7 @@ export class RushCommandLineParser extends CommandLineParser {
   public rushGlobalFolder: RushGlobalFolder;
 
   private _debugParameter: CommandLineFlagParameter;
+  private _ignoreEnginesParameter: CommandLineFlagParameter;
 
   constructor() {
     super({
@@ -59,6 +60,10 @@ export class RushCommandLineParser extends CommandLineParser {
     return this._debugParameter.value;
   }
 
+  public get isIgnoreEngines(): boolean {
+    return this._ignoreEnginesParameter.value;
+  }
+
   public flushTelemetry(): void {
     if (this.telemetry) {
       this.telemetry.flush();
@@ -71,6 +76,10 @@ export class RushCommandLineParser extends CommandLineParser {
       parameterShortName: '-d',
       description: 'Show the full call stack if an error occurs while executing the tool'
     });
+    this._ignoreEnginesParameter = this.defineFlagParameter({
+      parameterLongName: '--ignore-engines',
+      description: 'Ignores engines section in package.json for yarn and npm package managers'
+    });
   }
 
   protected onExecute(): Promise<void> {

apps/rush-lib/src/cli/actions/InstallAction.ts

@@ -27,6 +27,7 @@ export class InstallAction extends BaseInstallAction {
   protected buildInstallOptions(): IInstallManagerOptions {
     return {
       debug: this.parser.isDebug,
+      ignoreEngines: this.parser.isIgnoreEngines,
       allowShrinkwrapUpdates: false,
       bypassPolicy: this._bypassPolicyParameter.value!,
       noLink: this._noLinkParameter.value!,

apps/rush-lib/src/logic/InstallManager.ts

@@ -69,6 +69,10 @@ export interface IInstallManagerOptions {
    * Whether the global "--debug" flag was specified.
    */
   debug: boolean;
+  /**
+   * Whether the global "--ignore-engines" flag was specified.
+   */
+  ignoreEngines?: boolean;
   /**
    * Whether or not Rush will automatically update the shrinkwrap file.
    * True for "rush update", false for "rush install".
@@ -1146,6 +1150,10 @@ export class InstallManager {
         args.push('--network-concurrency', options.networkConcurrency.toString());
       }
     }
+
+    if (options.ignoreEngines) {
+      args.push('--ignore-engines');
+    }
   }
 
   /**

common/changes/@microsoft/rush/add-ignore-engines_2019-02-06-22-19.json

@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Add support for an --ignore-engines runtime flag",
+      "packageName": "@microsoft/rush",
+      "type": "none"
+    }
+  ],
+  "packageName": "@microsoft/rush",
+  "email": "[email protected]"
+}