no-namespace: ignore global augmentation (#3163)

[bugfix] `no-namespace` ignores global augmentation Fixes #3157

Author: ajafff

src/rules/noNamespaceRule.ts

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-import { hasModifier } from "tsutils";
+import { hasModifier, isNodeFlagSet } from "tsutils";
 import * as ts from "typescript";
 
 import * as Lint from "../index";
@@ -72,6 +72,7 @@ function walk(ctx: Lint.WalkContext<Options>) {
  for (const node of ctx.sourceFile.statements) {
  if (node.kind === ts.SyntaxKind.ModuleDeclaration) {
  if ((node as ts.ModuleDeclaration).name.kind !== ts.SyntaxKind.StringLiteral &&
+ !isNodeFlagSet(node, ts.NodeFlags.GlobalAugmentation) &&
  (!ctx.options.allowDeclarations || !hasModifier(node.modifiers, ts.SyntaxKind.DeclareKeyword))) {
  ctx.addFailureAtNode(node, Rule.FAILURE_STRING);
  }

test/rules/no-namespace/default/test.ts.lint

@@ -19,3 +19,7 @@ declare namespace Foo {
 
 declare module 'foo' {
 }
+
+declare global {
+ interface Foo {}
+}