diff --git a/packages/core/schematics/migrations/abstract-control-parent/index.ts b/packages/core/schematics/migrations/abstract-control-parent/index.ts
index 9aea59128b..31e701a98c 100644
--- a/packages/core/schematics/migrations/abstract-control-parent/index.ts
+++ b/packages/core/schematics/migrations/abstract-control-parent/index.ts
@@ -10,7 +10,7 @@ import {Rule, SchematicsException, Tree} from '@angular-devkit/schematics';
 import {relative} from 'path';
 
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationProgram} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
 import {findParentAccesses} from './util';
 
 
@@ -36,8 +36,8 @@ function runNativeAbstractControlParentMigration(
     tree: Tree, tsconfigPath: string, basePath: string) {
   const {program} = createMigrationProgram(tree, tsconfigPath, basePath);
   const typeChecker = program.getTypeChecker();
-  const sourceFiles = program.getSourceFiles().filter(
-      f => !f.isDeclarationFile && !program.isSourceFileFromExternalLibrary(f));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
 
   sourceFiles.forEach(sourceFile => {
     // We sort the nodes based on their position in the file and we offset the positions by one
diff --git a/packages/core/schematics/migrations/dynamic-queries/index.ts b/packages/core/schematics/migrations/dynamic-queries/index.ts
index 40ff3013c9..45c96530d3 100644
--- a/packages/core/schematics/migrations/dynamic-queries/index.ts
+++ b/packages/core/schematics/migrations/dynamic-queries/index.ts
@@ -11,7 +11,7 @@ import {relative} from 'path';
 import * as ts from 'typescript';
 
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationProgram} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
 
 import {identifyDynamicQueryNodes, removeOptionsParameter, removeStaticFlag} from './util';
 
@@ -39,8 +39,8 @@ export default function(): Rule {
 function runDynamicQueryMigration(tree: Tree, tsconfigPath: string, basePath: string) {
   const {program} = createMigrationProgram(tree, tsconfigPath, basePath);
   const typeChecker = program.getTypeChecker();
-  const sourceFiles = program.getSourceFiles().filter(
-      f => !f.isDeclarationFile && !program.isSourceFileFromExternalLibrary(f));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
   const printer = ts.createPrinter();
 
   sourceFiles.forEach(sourceFile => {
diff --git a/packages/core/schematics/migrations/google3/initialNavigationRule.ts b/packages/core/schematics/migrations/google3/initialNavigationRule.ts
index 41a2750c97..8f566288a3 100644
--- a/packages/core/schematics/migrations/google3/initialNavigationRule.ts
+++ b/packages/core/schematics/migrations/google3/initialNavigationRule.ts
@@ -31,7 +31,7 @@ export class Rule extends Rules.TypedRule {
     sourceFiles.forEach(sourceFile => initialNavigationCollector.visitNode(sourceFile));
 
     const {assignments} = initialNavigationCollector;
-    const transformer = new InitialNavigationTransform(typeChecker, getUpdateRecorder);
+    const transformer = new InitialNavigationTransform(getUpdateRecorder);
     const updateRecorders = new Map<ts.SourceFile, TslintUpdateRecorder>();
 
     transformer.migrateInitialNavigationAssignments(Array.from(assignments));
diff --git a/packages/core/schematics/migrations/initial-navigation/index.ts b/packages/core/schematics/migrations/initial-navigation/index.ts
index 1cab6ed87d..9c4a73b134 100644
--- a/packages/core/schematics/migrations/initial-navigation/index.ts
+++ b/packages/core/schematics/migrations/initial-navigation/index.ts
@@ -10,7 +10,7 @@ import {Rule, SchematicsException, Tree} from '@angular-devkit/schematics';
 import {relative} from 'path';
 import * as ts from 'typescript';
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationProgram} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
 import {InitialNavigationCollector} from './collector';
 import {InitialNavigationTransform} from './transform';
 import {UpdateRecorder} from './update_recorder';
@@ -36,14 +36,14 @@ function runInitialNavigationMigration(tree: Tree, tsconfigPath: string, basePat
   const {program} = createMigrationProgram(tree, tsconfigPath, basePath);
   const typeChecker = program.getTypeChecker();
   const initialNavigationCollector = new InitialNavigationCollector(typeChecker);
-  const sourceFiles = program.getSourceFiles().filter(
-      f => !f.isDeclarationFile && !program.isSourceFileFromExternalLibrary(f));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
 
   // Analyze source files by detecting all modules.
   sourceFiles.forEach(sourceFile => initialNavigationCollector.visitNode(sourceFile));
 
   const {assignments} = initialNavigationCollector;
-  const transformer = new InitialNavigationTransform(typeChecker, getUpdateRecorder);
+  const transformer = new InitialNavigationTransform(getUpdateRecorder);
   const updateRecorders = new Map<ts.SourceFile, UpdateRecorder>();
   transformer.migrateInitialNavigationAssignments(Array.from(assignments));
 
diff --git a/packages/core/schematics/migrations/initial-navigation/transform.ts b/packages/core/schematics/migrations/initial-navigation/transform.ts
index 32b105605d..cecd85ccba 100644
--- a/packages/core/schematics/migrations/initial-navigation/transform.ts
+++ b/packages/core/schematics/migrations/initial-navigation/transform.ts
@@ -13,9 +13,7 @@ import {UpdateRecorder} from './update_recorder';
 export class InitialNavigationTransform {
   private printer = ts.createPrinter();
 
-  constructor(
-      private typeChecker: ts.TypeChecker,
-      private getUpdateRecorder: (sf: ts.SourceFile) => UpdateRecorder) {}
+  constructor(private getUpdateRecorder: (sf: ts.SourceFile) => UpdateRecorder) {}
 
   /** Migrate the ExtraOptions#InitialNavigation property assignments. */
   migrateInitialNavigationAssignments(literals: ts.PropertyAssignment[]) {
@@ -62,14 +60,3 @@ function getUpdatedInitialNavigationValue(initializer: ts.Expression): ts.Expres
 
   return !!newText ? ts.createIdentifier(`'${newText}'`) : null;
 }
-
-/**
- * Check whether the value assigned to an `initialNavigation` assignment
- * conforms to the expected types for ExtraOptions#InitialNavigation
- * @param node the property assignment to check
- */
-function isValidInitialNavigationValue(node: ts.PropertyAssignment): boolean {
-  return ts.isStringLiteralLike(node.initializer) ||
-      node.initializer.kind === ts.SyntaxKind.FalseKeyword ||
-      node.initializer.kind === ts.SyntaxKind.TrueKeyword;
-}
diff --git a/packages/core/schematics/migrations/missing-injectable/index.ts b/packages/core/schematics/migrations/missing-injectable/index.ts
index 51a6c1da5d..11c734e884 100644
--- a/packages/core/schematics/migrations/missing-injectable/index.ts
+++ b/packages/core/schematics/migrations/missing-injectable/index.ts
@@ -10,7 +10,7 @@ import {Rule, SchematicContext, SchematicsException, Tree} from '@angular-devkit
 import {relative} from 'path';
 import * as ts from 'typescript';
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationProgram} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
 import {NgDefinitionCollector} from './definition_collector';
 import {MissingInjectableTransform} from './transform';
 import {UpdateRecorder} from './update_recorder';
@@ -46,8 +46,8 @@ function runMissingInjectableMigration(
   const failures: string[] = [];
   const typeChecker = program.getTypeChecker();
   const definitionCollector = new NgDefinitionCollector(typeChecker);
-  const sourceFiles = program.getSourceFiles().filter(
-      f => !f.isDeclarationFile && !program.isSourceFileFromExternalLibrary(f));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
 
   // Analyze source files by detecting all modules, directives and components.
   sourceFiles.forEach(sourceFile => definitionCollector.visitNode(sourceFile));
diff --git a/packages/core/schematics/migrations/module-with-providers/index.ts b/packages/core/schematics/migrations/module-with-providers/index.ts
index 9798cd960c..feaa645541 100644
--- a/packages/core/schematics/migrations/module-with-providers/index.ts
+++ b/packages/core/schematics/migrations/module-with-providers/index.ts
@@ -11,7 +11,7 @@ import {relative} from 'path';
 import * as ts from 'typescript';
 
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationProgram} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
 
 import {Collector} from './collector';
 import {AnalysisFailure, ModuleWithProvidersTransform} from './transform';
@@ -49,8 +49,8 @@ function runModuleWithProvidersMigration(tree: Tree, tsconfigPath: string, baseP
   const failures: string[] = [];
   const typeChecker = program.getTypeChecker();
   const collector = new Collector(typeChecker);
-  const sourceFiles = program.getSourceFiles().filter(
-      f => !f.isDeclarationFile && !program.isSourceFileFromExternalLibrary(f));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
 
   // Analyze source files by detecting all modules.
   sourceFiles.forEach(sourceFile => collector.visitNode(sourceFile));
diff --git a/packages/core/schematics/migrations/move-document/index.ts b/packages/core/schematics/migrations/move-document/index.ts
index 930ad9f3ad..bcfe1221d7 100644
--- a/packages/core/schematics/migrations/move-document/index.ts
+++ b/packages/core/schematics/migrations/move-document/index.ts
@@ -11,7 +11,7 @@ import {relative} from 'path';
 import * as ts from 'typescript';
 
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationProgram} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
 
 import {COMMON_IMPORT, DOCUMENT_TOKEN_NAME, DocumentImportVisitor, ResolvedDocumentImport} from './document_import_visitor';
 import {addToImport, createImport, removeFromImport} from './move-import';
@@ -43,8 +43,8 @@ function runMoveDocumentMigration(tree: Tree, tsconfigPath: string, basePath: st
   const {program} = createMigrationProgram(tree, tsconfigPath, basePath);
   const typeChecker = program.getTypeChecker();
   const visitor = new DocumentImportVisitor(typeChecker);
-  const sourceFiles = program.getSourceFiles().filter(
-      f => !f.isDeclarationFile && !program.isSourceFileFromExternalLibrary(f));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
 
   // Analyze source files by finding imports.
   sourceFiles.forEach(sourceFile => visitor.visitNode(sourceFile));
diff --git a/packages/core/schematics/migrations/native-view-encapsulation/index.ts b/packages/core/schematics/migrations/native-view-encapsulation/index.ts
index 766e8c4ca2..83d7a8312f 100644
--- a/packages/core/schematics/migrations/native-view-encapsulation/index.ts
+++ b/packages/core/schematics/migrations/native-view-encapsulation/index.ts
@@ -10,7 +10,7 @@ import {Rule, SchematicsException, Tree} from '@angular-devkit/schematics';
 import {relative} from 'path';
 
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationProgram} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
 import {findNativeEncapsulationNodes} from './util';
 
 
@@ -35,8 +35,8 @@ export default function(): Rule {
 function runNativeViewEncapsulationMigration(tree: Tree, tsconfigPath: string, basePath: string) {
   const {program} = createMigrationProgram(tree, tsconfigPath, basePath);
   const typeChecker = program.getTypeChecker();
-  const sourceFiles = program.getSourceFiles().filter(
-      f => !f.isDeclarationFile && !program.isSourceFileFromExternalLibrary(f));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
 
   sourceFiles.forEach(sourceFile => {
     const update = tree.beginUpdate(relative(basePath, sourceFile.fileName));
diff --git a/packages/core/schematics/migrations/navigation-extras-omissions/index.ts b/packages/core/schematics/migrations/navigation-extras-omissions/index.ts
index c8e7fa8032..b027a24da1 100644
--- a/packages/core/schematics/migrations/navigation-extras-omissions/index.ts
+++ b/packages/core/schematics/migrations/navigation-extras-omissions/index.ts
@@ -11,7 +11,7 @@ import {relative} from 'path';
 import * as ts from 'typescript';
 
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationProgram} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
 import {findLiteralsToMigrate, migrateLiteral} from './util';
 
 
@@ -38,8 +38,8 @@ function runNavigationExtrasOmissionsMigration(tree: Tree, tsconfigPath: string,
   const {program} = createMigrationProgram(tree, tsconfigPath, basePath);
   const typeChecker = program.getTypeChecker();
   const printer = ts.createPrinter();
-  const sourceFiles = program.getSourceFiles().filter(
-      f => !f.isDeclarationFile && !program.isSourceFileFromExternalLibrary(f));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
 
   sourceFiles.forEach(sourceFile => {
     const literalsToMigrate = findLiteralsToMigrate(sourceFile, typeChecker);
diff --git a/packages/core/schematics/migrations/relative-link-resolution/index.ts b/packages/core/schematics/migrations/relative-link-resolution/index.ts
index 6c2f672c9e..dba0f51508 100644
--- a/packages/core/schematics/migrations/relative-link-resolution/index.ts
+++ b/packages/core/schematics/migrations/relative-link-resolution/index.ts
@@ -10,7 +10,7 @@ import {Rule, SchematicsException, Tree} from '@angular-devkit/schematics';
 import {relative} from 'path';
 import * as ts from 'typescript';
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationProgram} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
 import {RelativeLinkResolutionCollector} from './collector';
 import {RelativeLinkResolutionTransform} from './transform';
 import {UpdateRecorder} from './update_recorder';
@@ -36,8 +36,8 @@ function runRelativeLinkResolutionMigration(tree: Tree, tsconfigPath: string, ba
   const {program} = createMigrationProgram(tree, tsconfigPath, basePath);
   const typeChecker = program.getTypeChecker();
   const relativeLinkResolutionCollector = new RelativeLinkResolutionCollector(typeChecker);
-  const sourceFiles = program.getSourceFiles().filter(
-      f => !f.isDeclarationFile && !program.isSourceFileFromExternalLibrary(f));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
 
   // Analyze source files by detecting all modules.
   sourceFiles.forEach(sourceFile => relativeLinkResolutionCollector.visitNode(sourceFile));
diff --git a/packages/core/schematics/migrations/renderer-to-renderer2/index.ts b/packages/core/schematics/migrations/renderer-to-renderer2/index.ts
index 79bf08a4cf..9caa76a98c 100644
--- a/packages/core/schematics/migrations/renderer-to-renderer2/index.ts
+++ b/packages/core/schematics/migrations/renderer-to-renderer2/index.ts
@@ -11,7 +11,7 @@ import {relative} from 'path';
 import * as ts from 'typescript';
 
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationProgram} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
 import {getImportSpecifier, replaceImport} from '../../utils/typescript/imports';
 import {closestNode} from '../../utils/typescript/nodes';
 
@@ -59,8 +59,8 @@ function runRendererToRenderer2Migration(tree: Tree, tsconfigPath: string, baseP
   }, [MODULE_AUGMENTATION_FILENAME]);
   const typeChecker = program.getTypeChecker();
   const printer = ts.createPrinter();
-  const sourceFiles = program.getSourceFiles().filter(
-      f => !f.isDeclarationFile && !program.isSourceFileFromExternalLibrary(f));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
 
   sourceFiles.forEach(sourceFile => {
     const rendererImportSpecifier = getImportSpecifier(sourceFile, '@angular/core', 'Renderer');
diff --git a/packages/core/schematics/migrations/router-preserve-query-params/index.ts b/packages/core/schematics/migrations/router-preserve-query-params/index.ts
index 973337f72c..79c4f125ac 100644
--- a/packages/core/schematics/migrations/router-preserve-query-params/index.ts
+++ b/packages/core/schematics/migrations/router-preserve-query-params/index.ts
@@ -11,7 +11,7 @@ import {relative} from 'path';
 import * as ts from 'typescript';
 
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationProgram} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
 import {findLiteralsToMigrate, migrateLiteral} from './util';
 
 
@@ -41,8 +41,8 @@ function runPreserveQueryParamsMigration(tree: Tree, tsconfigPath: string, baseP
   const {program} = createMigrationProgram(tree, tsconfigPath, basePath);
   const typeChecker = program.getTypeChecker();
   const printer = ts.createPrinter();
-  const sourceFiles = program.getSourceFiles().filter(
-      f => !f.isDeclarationFile && !program.isSourceFileFromExternalLibrary(f));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
 
   sourceFiles.forEach(sourceFile => {
     const literalsToMigrate = findLiteralsToMigrate(sourceFile, typeChecker);
diff --git a/packages/core/schematics/migrations/static-queries/index.ts b/packages/core/schematics/migrations/static-queries/index.ts
index 2a2c72b6a0..b0c684a78e 100644
--- a/packages/core/schematics/migrations/static-queries/index.ts
+++ b/packages/core/schematics/migrations/static-queries/index.ts
@@ -14,7 +14,7 @@ import * as ts from 'typescript';
 
 import {NgComponentTemplateVisitor} from '../../utils/ng_component_template';
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationProgram} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
 
 import {NgQueryResolveVisitor} from './angular/ng_query_visitor';
 import {QueryTemplateStrategy} from './strategies/template_strategy/template_strategy';
@@ -123,8 +123,8 @@ function analyzeProject(
   }
 
   const typeChecker = program.getTypeChecker();
-  const sourceFiles = program.getSourceFiles().filter(
-      f => !f.isDeclarationFile && !program.isSourceFileFromExternalLibrary(f));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
   const queryVisitor = new NgQueryResolveVisitor(typeChecker);
 
   // Analyze all project source-files and collect all queries that
diff --git a/packages/core/schematics/migrations/template-var-assignment/index.ts b/packages/core/schematics/migrations/template-var-assignment/index.ts
index b422c6b33c..8f9f7f79d2 100644
--- a/packages/core/schematics/migrations/template-var-assignment/index.ts
+++ b/packages/core/schematics/migrations/template-var-assignment/index.ts
@@ -12,7 +12,7 @@ import {relative} from 'path';
 
 import {NgComponentTemplateVisitor} from '../../utils/ng_component_template';
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationProgram} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
 
 import {analyzeResolvedTemplate} from './analyze_template';
 
@@ -48,8 +48,8 @@ function runTemplateVariableAssignmentCheck(
   const {program} = createMigrationProgram(tree, tsconfigPath, basePath);
   const typeChecker = program.getTypeChecker();
   const templateVisitor = new NgComponentTemplateVisitor(typeChecker);
-  const sourceFiles = program.getSourceFiles().filter(
-      f => !f.isDeclarationFile && !program.isSourceFileFromExternalLibrary(f));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
 
   // Analyze source files by detecting HTML templates.
   sourceFiles.forEach(sourceFile => templateVisitor.visitNode(sourceFile));
diff --git a/packages/core/schematics/migrations/undecorated-classes-with-decorated-fields/index.ts b/packages/core/schematics/migrations/undecorated-classes-with-decorated-fields/index.ts
index 4a3cd70bc1..0676ed5de0 100644
--- a/packages/core/schematics/migrations/undecorated-classes-with-decorated-fields/index.ts
+++ b/packages/core/schematics/migrations/undecorated-classes-with-decorated-fields/index.ts
@@ -11,7 +11,7 @@ import {relative} from 'path';
 import * as ts from 'typescript';
 
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationProgram} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
 
 import {UndecoratedClassesWithDecoratedFieldsTransform} from './transform';
 import {UpdateRecorder} from './update_recorder';
@@ -49,8 +49,8 @@ function runUndecoratedClassesMigration(
   const failures: string[] = [];
   const {program} = createMigrationProgram(tree, tsconfigPath, basePath);
   const typeChecker = program.getTypeChecker();
-  const sourceFiles = program.getSourceFiles().filter(
-      file => !file.isDeclarationFile && !program.isSourceFileFromExternalLibrary(file));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
   const updateRecorders = new Map<ts.SourceFile, UpdateRecorder>();
   const transform =
       new UndecoratedClassesWithDecoratedFieldsTransform(typeChecker, getUpdateRecorder);
diff --git a/packages/core/schematics/migrations/undecorated-classes-with-di/index.ts b/packages/core/schematics/migrations/undecorated-classes-with-di/index.ts
index c3a60b6d46..26d27102ff 100644
--- a/packages/core/schematics/migrations/undecorated-classes-with-di/index.ts
+++ b/packages/core/schematics/migrations/undecorated-classes-with-di/index.ts
@@ -16,7 +16,7 @@ import {relative} from 'path';
 import * as ts from 'typescript';
 
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationCompilerHost} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationCompilerHost} from '../../utils/typescript/compiler_host';
 
 import {createNgcProgram} from './create_ngc_program';
 import {NgDeclarationCollector} from './ng_declaration_collector';
@@ -85,8 +85,8 @@ function runUndecoratedClassesMigration(
   const partialEvaluator = new PartialEvaluator(
       new TypeScriptReflectionHost(typeChecker), typeChecker, /* dependencyTracker */ null);
   const declarationCollector = new NgDeclarationCollector(typeChecker, partialEvaluator);
-  const sourceFiles = program.getSourceFiles().filter(
-      s => !s.isDeclarationFile && !program.isSourceFileFromExternalLibrary(s));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
 
   // Analyze source files by detecting all directives, components and providers.
   sourceFiles.forEach(sourceFile => declarationCollector.visitNode(sourceFile));
diff --git a/packages/core/schematics/migrations/wait-for-async/index.ts b/packages/core/schematics/migrations/wait-for-async/index.ts
index 28254c5f7a..8c04faa58d 100644
--- a/packages/core/schematics/migrations/wait-for-async/index.ts
+++ b/packages/core/schematics/migrations/wait-for-async/index.ts
@@ -11,7 +11,7 @@ import {relative} from 'path';
 import * as ts from 'typescript';
 
 import {getProjectTsConfigPaths} from '../../utils/project_tsconfig_paths';
-import {createMigrationProgram} from '../../utils/typescript/compiler_host';
+import {canMigrateFile, createMigrationProgram} from '../../utils/typescript/compiler_host';
 import {getImportSpecifier, replaceImport} from '../../utils/typescript/imports';
 import {closestNode} from '../../utils/typescript/nodes';
 
@@ -54,8 +54,8 @@ function runWaitForAsyncMigration(tree: Tree, tsconfigPath: string, basePath: st
   }, [MODULE_AUGMENTATION_FILENAME]);
   const typeChecker = program.getTypeChecker();
   const printer = ts.createPrinter();
-  const sourceFiles = program.getSourceFiles().filter(
-      f => !f.isDeclarationFile && !program.isSourceFileFromExternalLibrary(f));
+  const sourceFiles =
+      program.getSourceFiles().filter(sourceFile => canMigrateFile(basePath, sourceFile, program));
   const deprecatedFunction = 'async';
   const newFunction = 'waitForAsync';
 
diff --git a/packages/core/schematics/utils/typescript/compiler_host.ts b/packages/core/schematics/utils/typescript/compiler_host.ts
index 03efd91c04..e39bdbc8ec 100644
--- a/packages/core/schematics/utils/typescript/compiler_host.ts
+++ b/packages/core/schematics/utils/typescript/compiler_host.ts
@@ -57,3 +57,24 @@ export function createMigrationCompilerHost(
 
   return host;
 }
+
+/**
+ * Checks whether a file can be migrate by our automated migrations.
+ * @param basePath Absolute path to the project.
+ * @param sourceFile File being checked.
+ * @param program Program that includes the source file.
+ */
+export function canMigrateFile(
+    basePath: string, sourceFile: ts.SourceFile, program: ts.Program): boolean {
+  // We shouldn't migrate .d.ts files or files from an external library.
+  if (sourceFile.isDeclarationFile || program.isSourceFileFromExternalLibrary(sourceFile)) {
+    return false;
+  }
+
+  // Our migrations are set up to create a `Program` from the project's tsconfig and to migrate all
+  // the files within the program. This can include files that are outside of the Angular CLI
+  // project. We can't migrate files outside of the project, because our file system interactions
+  // go through the CLI's `Tree` which assumes that all files are within the project. See:
+  // https://github.com/angular/angular-cli/blob/0b0961c9c233a825b6e4bb59ab7f0790f9b14676/packages/angular_devkit/schematics/src/tree/host-tree.ts#L131
+  return !relative(basePath, sourceFile.fileName).startsWith('..');
+}