Add build-ref input

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

.github/workflows/ci.yml

@@ -313,3 +313,26 @@ jobs:
           echo "Status:    ${{ steps.buildx.outputs.status }}"
           echo "Flags:     ${{ steps.buildx.outputs.flags }}"
           echo "Platforms: ${{ steps.buildx.outputs.platforms }}"
+
+  build-ref:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ref:
+          - master
+          - refs/tags/v0.5.1
+          - refs/pull/648/head
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Set up Docker Buildx
+        uses: ./
+        with:
+          build-ref: https://github.com/docker/buildx.git#${{ matrix.ref }}
+      -
+        name: Check version
+        run: |
+          docker buildx version

.prettierrc.json

@@ -1,5 +1,5 @@
 {
-  "printWidth": 120,
+  "printWidth": 240,
   "tabWidth": 2,
   "useTabs": false,
   "semi": true,

README.md

@@ -125,7 +125,8 @@ Following inputs can be used as `step.with` keys
 
 | Name               | Type    | Description                       |
 |--------------------|---------|-----------------------------------|
-| `version`          | String  | [Buildx](https://github.com/docker/buildx) version. (eg. `v0.3.0`, `latest`) |
+| `version`          | String  | [buildx](https://github.com/docker/buildx) version. (eg. `v0.3.0`, `latest`) |
+| `build-ref`        | String  | Build and install [buildx](https://github.com/docker/buildx) from a Git ref. (eg. `https://github.com/docker/buildx.git#master`) |
 | `driver`           | String  | Sets the [builder driver](https://github.com/docker/buildx/blob/master/docs/reference/buildx_create.md#driver) to be used (default `docker-container`) |
 | `driver-opts`      | CSV     | List of additional [driver-specific options](https://github.com/docker/buildx/blob/master/docs/reference/buildx_create.md#driver-opt) (eg. `image=moby/buildkit:master`) |
 | `buildkitd-flags`  | String  | [Flags for buildkitd](https://github.com/moby/buildkit/blob/master/docs/buildkitd.toml.md) daemon (since [buildx v0.3.0](https://github.com/docker/buildx/releases/tag/v0.3.0)) |

__tests__/buildx.test.ts

@@ -1,10 +1,19 @@
-import fs = require('fs');
-import * as buildx from '../src/buildx';
-import * as path from 'path';
+import * as fs from 'fs';
 import * as os from 'os';
+import * as path from 'path';
+import * as buildx from '../src/buildx';
+import * as context from '../src/context';
 import * as semver from 'semver';
 import * as exec from '@actions/exec';
 
+jest.spyOn(context, 'tmpDir').mockImplementation((): string => {
+  const tmpDir = path.join('/tmp/.docker-setup-buildx-jest').split(path.sep).join(path.posix.sep);
+  if (!fs.existsSync(tmpDir)) {
+    fs.mkdirSync(tmpDir, {recursive: true});
+  }
+  return tmpDir;
+});
+
 describe('isAvailable', () => {
   const execSpy: jest.SpyInstance = jest.spyOn(exec, 'getExecOutput');
   buildx.isAvailable();
@@ -41,7 +50,8 @@ describe('parseVersion', () => {
   test.each([
     ['github.com/docker/buildx 0.4.1+azure bda4882a65349ca359216b135896bddc1d92461c', '0.4.1'],
     ['github.com/docker/buildx v0.4.1 bda4882a65349ca359216b135896bddc1d92461c', '0.4.1'],
-    ['github.com/docker/buildx v0.4.2 fb7b670b764764dc4716df3eba07ffdae4cc47b2', '0.4.2']
+    ['github.com/docker/buildx v0.4.2 fb7b670b764764dc4716df3eba07ffdae4cc47b2', '0.4.2'],
+    ['github.com/docker/buildx f117971 f11797113e5a9b86bd976329c5dbb8a8bfdfadfa', 'f117971']
   ])('given %p', async (stdout, expected) => {
     expect(await buildx.parseVersion(stdout)).toEqual(expected);
   });
@@ -72,6 +82,15 @@ describe('inspect', () => {
   );
 });
 
+describe('build', () => {
+  it.skip('valid', async () => {
+    const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'setup-buildx-'));
+    const buildxBin = await buildx.build('https://github.com/docker/buildx.git#refs/pull/648/head', tmpDir);
+    console.log(buildxBin);
+    expect(fs.existsSync(buildxBin)).toBe(true);
+  }, 100000);
+});
+
 describe('install', () => {
   const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'setup-buildx-'));
   it('acquires v0.4.1 version of buildx', async () => {

__tests__/context.test.ts

@@ -1,6 +1,16 @@
+import * as fs from 'fs';
 import * as os from 'os';
+import * as path from 'path';
 import * as context from '../src/context';
 
+jest.spyOn(context, 'tmpDir').mockImplementation((): string => {
+  const tmpDir = path.join('/tmp/.docker-setup-buildx-jest').split(path.sep).join(path.posix.sep);
+  if (!fs.existsSync(tmpDir)) {
+    fs.mkdirSync(tmpDir, {recursive: true});
+  }
+  return tmpDir;
+});
+
 describe('getInputList', () => {
   it('handles single line correctly', async () => {
     await setInput('foo', 'bar');

__tests__/git.test.ts

@@ -0,0 +1,9 @@
+import * as git from '../src/git';
+
+describe('git', () => {
+  it('returns git remote ref', async () => {
+    const ref: string = await git.getRemoteSha('https://github.com/docker/buildx.git', 'refs/pull/648/head');
+    console.log(`ref: ${ref}`);
+    expect(ref).toEqual('f11797113e5a9b86bd976329c5dbb8a8bfdfadfa');
+  });
+});

action.yml

@@ -10,6 +10,9 @@ inputs:
   version:
     description: 'Buildx version. (eg. v0.3.0)'
     required: false
+  build-ref:
+    description: 'Build and install buildx from a Git ref'
+    required: false
   driver:
     description: 'Sets the builder driver to be used'
     default: 'docker-container'