fix(schematics): allow more tsconfig locations for ng update

src/lib/schematics/update/update.ts

@@ -1,17 +1,23 @@
-import {chain, FileEntry, Rule, SchematicContext, Tree} from '@angular-devkit/schematics';
+import {FileEntry, Rule, SchematicContext, Tree} from '@angular-devkit/schematics';
 import {
   NodePackageInstallTask,
   RunSchematicTask,
   TslintFixTask
 } from '@angular-devkit/schematics/tasks';
 import * as path from 'path';
+import {existsSync, readFileSync} from 'fs';
+import {getProjectFromWorkspace, getWorkspace} from '../utils/devkit-utils/config';
 
 const schematicsSrcPath = 'node_modules/@angular/material/schematics';
 const schematicsTmpPath = 'node_modules/_tmp_angular_material_schematics';
 
 /** Entry point for `ng update` from Angular CLI. */
 export default function(): Rule {
   return (tree: Tree, context: SchematicContext) => {
+    // If this script failed in an earlier run, clear out the temporary files from that failed
+    // run before doing anything else.
+    tree.getDir(schematicsTmpPath).visit((_, entry) => tree.delete(entry.path));
+
     // Copy the update schematics to a temporary directory.
     const updateSrcs: FileEntry[] = [];
     tree.getDir(schematicsSrcPath).visit((_, entry) => updateSrcs.push(entry));
@@ -25,48 +31,52 @@ export default function(): Rule {
       packageName: '@angular/cdk@">=5 <6" @angular/material@">=5 <6"'
     }));
 
-    // Run the update tslint rules.
-    const updateTask = context.addTask(new TslintFixTask({
-      rulesDirectory: path.join(schematicsTmpPath, 'update/rules'),
-      rules: {
-        // Automatic fixes.
-        "switch-identifiers": true,
-        "switch-property-names": true,
-        "switch-string-literal-attribute-selectors": true,
-        "switch-string-literal-css-names": true,
-        "switch-string-literal-element-selectors": true,
-        "switch-stylesheet-attribute-selectors": true,
-        "switch-stylesheet-css-names": true,
-        "switch-stylesheet-element-selectors": true,
-        "switch-stylesheet-input-names": true,
-        "switch-stylesheet-output-names": true,
-        "switch-template-attribute-selectors": true,
-        "switch-template-css-names": true,
-        "switch-template-element-selectors": true,
-        "switch-template-export-as-names": true,
-        "switch-template-input-names": true,
-        "switch-template-output-names": true,
+    const allTsConfigPaths = getTsConfigPaths(tree);
+    const allUpdateTasks = [];
+    for (const tsconfig of allTsConfigPaths) {
+      // Run the update tslint rules.
+      allUpdateTasks.push(context.addTask(new TslintFixTask({
+        rulesDirectory: path.join(schematicsTmpPath, 'update/rules'),
+        rules: {
+          // Automatic fixes.
+          "switch-identifiers": true,
+          "switch-property-names": true,
+          "switch-string-literal-attribute-selectors": true,
+          "switch-string-literal-css-names": true,
+          "switch-string-literal-element-selectors": true,
+          "switch-stylesheet-attribute-selectors": true,
+          "switch-stylesheet-css-names": true,
+          "switch-stylesheet-element-selectors": true,
+          "switch-stylesheet-input-names": true,
+          "switch-stylesheet-output-names": true,
+          "switch-template-attribute-selectors": true,
+          "switch-template-css-names": true,
+          "switch-template-element-selectors": true,
+          "switch-template-export-as-names": true,
+          "switch-template-input-names": true,
+          "switch-template-output-names": true,
 
-        // Additional issues we can detect but not automatically fix.
-        "check-class-declaration-misc": true,
-        "check-identifier-misc": true,
-        "check-import-misc": true,
-        "check-inheritance": true,
-        "check-method-calls": true,
-        "check-property-access-misc": true,
-        "check-template-misc": true
-      }
-    }, {
-      silent: false,
-      ignoreErrors: true,
-      tsConfigPath: './src/tsconfig.json',
-    }), [downgradeTask]);
+          // Additional issues we can detect but not automatically fix.
+          "check-class-declaration-misc": true,
+          "check-identifier-misc": true,
+          "check-import-misc": true,
+          "check-inheritance": true,
+          "check-method-calls": true,
+          "check-property-access-misc": true,
+          "check-template-misc": true
+        }
+      }, {
+        silent: false,
+        ignoreErrors: true,
+        tsConfigPath: tsconfig,
+      }), [downgradeTask]));
+    }
 
     // Upgrade @angular/material back to 6.x.
     const upgradeTask = context.addTask(new NodePackageInstallTask({
       // TODO(mmalerba): Change "next" to ">=6 <7".
       packageName: '@angular/cdk@next @angular/material@next'
-    }), [updateTask]);
+    }), allUpdateTasks);
 
     // Delete the temporary schematics directory.
     context.addTask(
@@ -94,3 +104,36 @@ export function postPostUpdate(): Rule {
       '\nComplete! Please check the output above for any issues that were detected but could not' +
       ' be automatically fixed.');
 }
+
+/** Gets the first tsconfig path from possibile locations based on the history of the CLI. */
+function getTsConfigPaths(tree: Tree): string[] {
+  // Start with some tsconfig paths that are generally used.
+  const tsconfigPaths = [
+    './tsconfig.json',
+    './src/tsconfig.json',
+    './src/tsconfig.app.json',
+  ];
+
+  // Add any tsconfig directly referenced in a build or test task of the angular.json workspace.
+  const workspace = getWorkspace(tree);
+  for (const project of Object.values(workspace.projects)) {
+    if (project && project.architect) {
+      for (const taskName of ['build', 'test']) {
+        const task = project.architect[taskName];
+        if (task && task.options && task.options.tsConfig) {
+          const tsConfigOption = project.architect.tsConfig;
+          if (typeof tsConfigOption === 'string') {
+            tsconfigPaths.push(tsConfigOption);
+          } else if (Array.isArray(tsConfigOption)) {
+            tsconfigPaths.push(...tsConfigOption);
+          }
+        }
+      }
+    }
+  }
+
+  // Filter out tsconfig files that don't exist and remove any duplicates.
+  return tsconfigPaths
+      .filter(p => existsSync(p))
+      .filter((value, index, self) => self.indexOf(value) === index);
+}