use registry hosts for scoped credentials

Parse registry URLs so scoped ECR credentials use the same config directory
for login, logout, and Buildx lookup. Preserve explicit default ports.

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

__tests__/context.test.ts

@@ -3,7 +3,7 @@ import * as path from 'path';
 
 import {Buildx} from '@docker/actions-toolkit/lib/buildx/buildx.js';
 
-import {getAuthList, getInputs} from '../src/context.js';
+import {getAuthList, getInputs, scopeToConfigDir} from '../src/context.js';
 
 afterEach(() => {
   vi.restoreAllMocks();
@@ -188,3 +188,23 @@ test.each([
   });
   expect(auth.ecr).toBe(expected);
 });
+
+// prettier-ignore
+test.each([
+  ['ghcr.io', 'ghcr.io'],
+  ['ghcr.io/', 'ghcr.io'],
+  ['https://ghcr.io', 'ghcr.io'],
+  ['https://ghcr.io/', 'ghcr.io'],
+  ['https://ghcr.io/v2/', 'ghcr.io'],
+  ['http://localhost:5000', 'localhost:5000'],
+  ['http://localhost:80', 'localhost:80'],
+  ['https://ghcr.io:443', 'ghcr.io:443'],
+  ['https://012345678910.dkr.ecr.eu-west-3.amazonaws.com', '012345678910.dkr.ecr.eu-west-3.amazonaws.com'],
+  ['https://docker.io', 'registry-1.docker.io']
+])('scopeToConfigDir uses the registry host for %s', (registry, host) => {
+  expect(scopeToConfigDir(registry, 'myorg/myimage@push')).toBe(path.join(Buildx.configDir, 'config', host, 'myorg', 'myimage') + '@push');
+});
+
+test('scopeToConfigDir rejects a URL whose host escapes the config directory', () => {
+  expect(() => scopeToConfigDir('https://../', '@push')).toThrow(/Invalid registry/);
+});

__tests__/docker.test.ts

@@ -1,8 +1,12 @@
 import {afterEach, expect, test, vi} from 'vitest';
+import * as path from 'path';
 
+import {Buildx} from '@docker/actions-toolkit/lib/buildx/buildx.js';
 import {Docker} from '@docker/actions-toolkit/lib/docker/docker.js';
 
-import {login, loginStandard, logout} from '../src/docker.js';
+import * as aws from '../src/aws.js';
+import {getAuthList} from '../src/context.js';
+import {login, loginECR, loginStandard, logout} from '../src/docker.js';
 import * as dockerhub from '../src/dockerhub.js';
 
 afterEach(() => {
@@ -92,3 +96,29 @@ test('logout calls exec', async () => {
     ignoreReturnCode: true
   });
 });
+
+test('loginECR and logout use the config dir of the registry host', async () => {
+  const execSpy = vi.spyOn(Docker, 'getExecOutput').mockResolvedValue({
+    exitCode: 0,
+    stdout: '',
+    stderr: ''
+  });
+  const registry = '012345678910.dkr.ecr.eu-west-3.amazonaws.com';
+  vi.spyOn(aws, 'getRegistriesData').mockResolvedValue([
+    {
+      registry: `https://${registry}`,
+      username: 'AWS',
+      password: 'world'
+    }
+  ]);
+
+  const scope = 'myapp@push';
+  const [auth] = getAuthList({registry, username: 'CAFEBABE', password: 'DEADBEEF', scope, ecr: 'auto', logout: true, registryAuth: ''});
+  await loginECR(auth.registry, auth.username, auth.password, auth.scope);
+  await logout(auth.registry, auth.configDir);
+
+  const expectedConfigDir = path.join(Buildx.configDir, 'config', registry, 'myapp@push');
+  expect(execSpy).toHaveBeenCalledTimes(2);
+  expect(execSpy.mock.calls[0][1]?.env?.DOCKER_CONFIG).toBe(expectedConfigDir);
+  expect(execSpy.mock.calls[1][1]?.env?.DOCKER_CONFIG).toBe(expectedConfigDir);
+});

src/context.ts

@@ -77,8 +77,11 @@ export function scopeToConfigDir(registry: string, scope?: string): string {
   if (scopeDisabled() || !scope || scope === '') {
     return '';
   }
+  const schemeEnd = registry.indexOf('://');
+  // A neutral scheme preserves explicit ports, including HTTP(S) default ports.
+  const registryHost = schemeEnd === -1 ? registry : new URL(`registry://${registry.slice(schemeEnd + 3)}`).host;
   const configRoot = path.resolve(Buildx.configDir, 'config');
-  const registryDir = path.resolve(configRoot, registry === 'docker.io' ? 'registry-1.docker.io' : registry);
+  const registryDir = path.resolve(configRoot, registryHost === 'docker.io' ? 'registry-1.docker.io' : registryHost);
   if (!isChildPath(configRoot, registryDir)) {
     throw new Error(`Invalid registry '${registry}': resolved config path escapes the Buildx config directory`);
   }