Merge pull request #165 from crazy-max/append

append nodes to builder support

.github/workflows/ci.yml

@@ -305,9 +305,13 @@ jobs:
           platforms: ${{ matrix.qemu-platforms }}
       -
         name: Set up Docker Buildx
+        id: buildx
         uses: ./
         with:
           version: ${{ matrix.buildx-version }}
+      -
+        name: List builder platforms
+        run: echo ${{ steps.buildx.outputs.platforms }}
 
   build-ref:
     runs-on: ubuntu-latest
@@ -416,3 +420,47 @@ jobs:
             echo "::error::Should have failed"
             exit 1
           fi
+
+  append:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Create dummy contexts
+        run: |
+          docker context create ctxbuilder2
+          docker context create ctxbuilder3
+      -
+        name: Set up Docker Buildx
+        id: buildx
+        uses: ./
+        with:
+          append: |
+            - name: builder2
+              endpoint: ctxbuilder2
+              platforms: linux/amd64
+              driver-opts:
+                - image=moby/buildkit:master
+                - network=host
+            - endpoint: ctxbuilder3
+              platforms: linux/arm64
+      -
+        name: List builder platforms
+        run: echo ${{ steps.buildx.outputs.platforms }}
+
+  platforms:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      -
+        name: Set up Docker Buildx
+        uses: ./
+        with:
+          platforms: linux/amd64

README.md

@@ -21,6 +21,7 @@ ___
 * [Usage](#usage)
 * [Advanced usage](#advanced-usage)
   * [Authentication support](docs/advanced/auth.md)
+  * [Append additional nodes to the builder](docs/advanced/append-nodes.md)
   * [Install by default](docs/advanced/install-default.md)
   * [BuildKit daemon configuration](docs/advanced/buildkit-config.md)
   * [Standalone mode](docs/advanced/standalone.md)
@@ -61,6 +62,7 @@ jobs:
 ## Advanced usage
 
 * [Authentication support](docs/advanced/auth.md)
+* [Append additional nodes to the builder](docs/advanced/append-nodes.md)
 * [Install by default](docs/advanced/install-default.md)
 * [BuildKit daemon configuration](docs/advanced/buildkit-config.md)
 * [Standalone mode](docs/advanced/standalone.md)
@@ -69,32 +71,36 @@ jobs:
 
 ### inputs
 
-Following inputs can be used as `step.with` keys
+Following inputs can be used as `step.with` keys:
 
-| Name              | Type   | Description                                                                                                                                                                                     |
+> `List` type is a newline-delimited string
-|-------------------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| `version`         | String | [Buildx](https://github.com/docker/buildx) version. (eg. `v0.3.0`, `latest`, `https://github.com/docker/buildx.git#master`)                                                                     |
-| `driver`          | String | Sets the [builder driver](https://docs.docker.com/engine/reference/commandline/buildx_create/#driver) to be used (default `docker-container`)                                                   |
-| `driver-opts`     | CSV    | List of additional [driver-specific options](https://docs.docker.com/engine/reference/commandline/buildx_create/#driver-opt) (eg. `image=moby/buildkit:master`)                                 |
-| `buildkitd-flags` | String | [Flags for buildkitd](https://docs.docker.com/engine/reference/commandline/buildx_create/#buildkitd-flags) daemon (since [buildx v0.3.0](https://github.com/docker/buildx/releases/tag/v0.3.0)) |
-| `install`         | Bool   | Sets up `docker build` command as an alias to `docker buildx` (default `false`)                                                                                                                 |
-| `use`             | Bool   | Switch to this builder instance (default `true`)                                                                                                                                                |
-| `endpoint`        | String | [Optional address for docker socket](https://docs.docker.com/engine/reference/commandline/buildx_create/#description) or context from `docker context ls`                                       |
-| `config`¹         | String | [BuildKit config file](https://docs.docker.com/engine/reference/commandline/buildx_create/#config)                                                                                              |
-| `config-inline`¹  | String | Same as `config` but inline                                                                                                                                                                     |
-
-> * ¹ `config` and `config-inline` are mutually exclusive
-
-> `CSV` type must be a newline-delimited string
-> ```yaml
-> driver-opts: image=moby/buildkit:master
-> ```
 > ```yaml
 > driver-opts: |
 >   image=moby/buildkit:master
 >   network=host
 > ```
 
+> `CSV` type must be a newline-delimited string
+> ```yaml
+> platforms: linux/amd64,linux/arm64
+> ```
+
+| Name              | Type     | Description                                                                                                                                                                                     |
+|-------------------|----------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `version`         | String   | [Buildx](https://github.com/docker/buildx) version. (eg. `v0.3.0`, `latest`, `https://github.com/docker/buildx.git#master`)                                                                     |
+| `driver`          | String   | Sets the [builder driver](https://docs.docker.com/engine/reference/commandline/buildx_create/#driver) to be used (default `docker-container`)                                                   |
+| `driver-opts`     | List     | List of additional [driver-specific options](https://docs.docker.com/engine/reference/commandline/buildx_create/#driver-opt) (eg. `image=moby/buildkit:master`)                                 |
+| `buildkitd-flags` | String   | [Flags for buildkitd](https://docs.docker.com/engine/reference/commandline/buildx_create/#buildkitd-flags) daemon (since [buildx v0.3.0](https://github.com/docker/buildx/releases/tag/v0.3.0)) |
+| `install`         | Bool     | Sets up `docker build` command as an alias to `docker buildx` (default `false`)                                                                                                                 |
+| `use`             | Bool     | Switch to this builder instance (default `true`)                                                                                                                                                |
+| `endpoint`        | String   | [Optional address for docker socket](https://docs.docker.com/engine/reference/commandline/buildx_create/#description) or context from `docker context ls`                                       |
+| `platforms`       | List/CSV | Fixed [platforms](https://docs.docker.com/engine/reference/commandline/buildx_create/#platform) for current node. If not empty, values take priority over the detected ones.                    |
+| `config`¹         | String   | [BuildKit config file](https://docs.docker.com/engine/reference/commandline/buildx_create/#config)                                                                                              |
+| `config-inline`¹  | String   | Same as `config` but inline                                                                                                                                                                     |
+| `append`          | YAML     | [Append additional nodes](docs/advanced/append-nodes.md) to the builder                                                                                                                         |
+
+> * ¹ `config` and `config-inline` are mutually exclusive
+
 ### outputs
 
 Following outputs are available

__tests__/context.test.ts

@@ -4,6 +4,7 @@ import * as os from 'os';
 import * as path from 'path';
 import * as uuid from 'uuid';
 import * as context from '../src/context';
+import * as nodes from '../src/nodes';
 
 const tmpdir = fs.mkdtempSync(path.join(os.tmpdir(), 'docker-setup-buildx-')).split(path.sep).join(path.posix.sep);
 jest.spyOn(context, 'tmpDir').mockImplementation((): string => {
@@ -90,6 +91,24 @@ describe('getCreateArgs', () => {
         'tls://foo:1234'
       ]
     ],
+    [
+      4,
+      new Map<string, string>([
+        ['driver', 'remote'],
+        ['platforms', 'linux/arm64,linux/arm/v7'],
+        ['endpoint', 'tls://foo:1234'],
+        ['install', 'false'],
+        ['use', 'true'],
+      ]),
+      [
+        'create',
+        '--name', 'builder-9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d',
+        '--driver', 'remote',
+        '--platform', 'linux/arm64,linux/arm/v7',
+        '--use',
+        'tls://foo:1234'
+      ]
+    ],
   ])(
     '[%d] given %p as inputs, returns %p',
     async (num: number, inputs: Map<string, string>, expected: Array<string>) => {
@@ -103,6 +122,57 @@ describe('getCreateArgs', () => {
   );
 });
 
+describe('getAppendArgs', () => {
+  beforeEach(() => {
+    process.env = Object.keys(process.env).reduce((object, key) => {
+      if (!key.startsWith('INPUT_')) {
+        object[key] = process.env[key];
+      }
+      return object;
+    }, {});
+  });
+
+  // prettier-ignore
+  test.each([
+    [
+      0,
+      new Map<string, string>([
+        ['install', 'false'],
+        ['use', 'true'],
+      ]),
+      {
+        "name": "aws_graviton2",
+        "endpoint": "ssh://me@graviton2",
+        "driver-opts": [
+          "image=moby/buildkit:latest"
+        ],
+        "buildkitd-flags": "--allow-insecure-entitlement security.insecure --allow-insecure-entitlement network.host",
+        "platforms": "linux/arm64"
+      },
+      [
+        'create',
+        '--name', 'builder-9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d',
+        '--append',
+        '--node', 'aws_graviton2',
+        '--driver-opt', 'image=moby/buildkit:latest',
+        '--buildkitd-flags', '--allow-insecure-entitlement security.insecure --allow-insecure-entitlement network.host',
+        '--platform', 'linux/arm64',
+        'ssh://me@graviton2'
+      ]
+    ]
+  ])(
+    '[%d] given %p as inputs, returns %p',
+    async (num: number, inputs: Map<string, string>, node: nodes.Node, expected: Array<string>) => {
+      inputs.forEach((value: string, name: string) => {
+        setInput(name, value);
+      });
+      const inp = await context.getInputs();
+      const res = await context.getAppendArgs(inp, node, '0.9.0');
+      expect(res).toEqual(expected);
+    }
+  );
+});
+
 describe('getInputList', () => {
   it('handles single line correctly', async () => {
     await setInput('foo', 'bar');

action.yml

@@ -32,12 +32,18 @@ inputs:
   endpoint:
     description: 'Optional address for docker socket or context from `docker context ls`'
     required: false
+  platforms:
+    description: 'Fixed platforms for current node. If not empty, values take priority over the detected ones'
+    required: false
   config:
     description: 'BuildKit config file'
     required: false
   config-inline:
     description: 'Inline BuildKit config'
     required: false
+  append:
+    description: 'Append additional nodes to the builder'
+    required: false
 
 outputs:
   name:

dist/licenses.txt

@@ -143,6 +143,31 @@ IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 
+csv-parse
+MIT
+The MIT License (MIT)
+
+Copyright (c) 2010 Adaltas
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+
 fs.realpath
 ISC
 The ISC License
@@ -254,6 +279,31 @@ PERFORMANCE OF THIS SOFTWARE.
 
 
 
+js-yaml
+MIT
+(The MIT License)
+
+Copyright (C) 2011-2015 by Vitaly Puzrin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+
 lru-cache
 ISC
 The ISC License

docs/advanced/append-nodes.md

@@ -0,0 +1,56 @@
+# Append additional nodes to the builder
+
+Buildx also supports running builds on multiple machines. This is useful for
+building [multi-platform images](https://docs.docker.com/build/building/multi-platform/)
+on native nodes for more complicated cases that are not handled by QEMU and
+generally have better performance or for distributing the build across multiple
+machines.
+
+You can append nodes to the builder that is going to be created with the
+`append` input in the form of a YAML string document to remove limitations
+intrinsically linked to GitHub Actions (only string format is handled in the
+input fields):
+
+| Name              | Type   | Description                                                                                                                                                                                                                                                                           |
+|-------------------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `name`            | String | [Name of the node](https://docs.docker.com/engine/reference/commandline/buildx_create/#node). If empty, it is the name of the builder it belongs to, with an index number suffix. This is useful to set it if you want to modify/remove a node in an underlying step of you workflow. |
+| `endpoint`        | String | [Docker context or endpoint](https://docs.docker.com/engine/reference/commandline/buildx_create/#description) of the node to add to the builder                                                                                                                                       |
+| `driver-opts`     | List   | List of additional [driver-specific options](https://docs.docker.com/engine/reference/commandline/buildx_create/#driver-opt)                                                                                                                                                          |
+| `buildkitd-flags` | String | [Flags for buildkitd](https://docs.docker.com/engine/reference/commandline/buildx_create/#buildkitd-flags) daemon                                                                                                                                                                     |
+| `platforms`       | String | Fixed [platforms](https://docs.docker.com/engine/reference/commandline/buildx_create/#platform) for the node. If not empty, values take priority over the detected ones.                                                                                                              |
+
+Here is an example using remote nodes with the [`remote` driver](https://docs.docker.com/build/building/drivers/remote/)
+and [TLS authentication](auth.md#tls-authentication):
+
+```yaml
+name: ci
+
+on:
+  push:
+
+jobs:
+  buildx:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+        with:
+          driver: remote
+          endpoint: tcp://oneprovider:1234
+          append: |
+            - endpoint: tcp://graviton2:1234
+              platforms: linux/arm64
+            - endpoint: tcp://linuxone:1234
+              platforms: linux/s390x
+        env:
+          BUILDER_NODE_0_AUTH_TLS_CACERT: ${{ secrets.ONEPROVIDER_CA }}
+          BUILDER_NODE_0_AUTH_TLS_CERT: ${{ secrets.ONEPROVIDER_CERT }}
+          BUILDER_NODE_0_AUTH_TLS_KEY: ${{ secrets.ONEPROVIDER_KEY }}
+          BUILDER_NODE_1_AUTH_TLS_CACERT: ${{ secrets.GRAVITON2_CA }}
+          BUILDER_NODE_1_AUTH_TLS_CERT: ${{ secrets.GRAVITON2_CERT }}
+          BUILDER_NODE_1_AUTH_TLS_KEY: ${{ secrets.GRAVITON2_KEY }}
+          BUILDER_NODE_2_AUTH_TLS_CACERT: ${{ secrets.LINUXONE_CA }}
+          BUILDER_NODE_2_AUTH_TLS_CERT: ${{ secrets.LINUXONE_CERT }}
+          BUILDER_NODE_2_AUTH_TLS_KEY: ${{ secrets.LINUXONE_KEY }}
+```

docs/advanced/auth.md

@@ -41,11 +41,6 @@ the node in the list of nodes:
 * `BUILDER_NODE_<idx>_AUTH_TLS_CERT`
 * `BUILDER_NODE_<idx>_AUTH_TLS_KEY`
 
-> **Note**
-> 
-> The index is always `0` at the moment as we don't support (yet) appending new
-> nodes with this action.
-
 ```yaml
 name: ci
 

jest.config.ts

@@ -1,10 +1,13 @@
 module.exports = {
   clearMocks: true,
   moduleFileExtensions: ['js', 'ts'],
-  setupFiles: ["dotenv/config"],
+  setupFiles: ['dotenv/config'],
   testMatch: ['**/*.test.ts'],
   transform: {
     '^.+\\.ts$': 'ts-jest'
   },
+  moduleNameMapper: {
+    '^csv-parse/sync': '<rootDir>/node_modules/csv-parse/dist/cjs/sync.cjs'
+  },
   verbose: true
-}
+};

package.json

@@ -31,6 +31,8 @@
     "@actions/exec": "^1.1.1",
     "@actions/http-client": "^2.0.1",
     "@actions/tool-cache": "^2.0.1",
+    "csv-parse": "^5.1.0",
+    "js-yaml": "^4.1.0",
     "semver": "^7.3.7",
     "tmp": "^0.2.1",
     "uuid": "^9.0.0"

src/context.ts

@@ -3,7 +3,9 @@ import * as os from 'os';
 import path from 'path';
 import * as tmp from 'tmp';
 import * as uuid from 'uuid';
+import {parse} from 'csv-parse/sync';
 import * as buildx from './buildx';
+import * as nodes from './nodes';
 import * as core from '@actions/core';
 
 let _tmpDir: string;
@@ -27,11 +29,13 @@ export interface Inputs {
   driver: string;
   driverOpts: string[];
   buildkitdFlags: string;
+  platforms: string[];
   install: boolean;
   use: boolean;
   endpoint: string;
   config: string;
   configInline: string;
+  append: string;
 }
 
 export async function getInputs(): Promise<Inputs> {
@@ -41,11 +45,13 @@ export async function getInputs(): Promise<Inputs> {
     driver: core.getInput('driver') || 'docker-container',
     driverOpts: await getInputList('driver-opts', true),
     buildkitdFlags: core.getInput('buildkitd-flags') || '--allow-insecure-entitlement security.insecure --allow-insecure-entitlement network.host',
+    platforms: await getInputList('platforms'),
     install: core.getBooleanInput('install'),
     use: core.getBooleanInput('use'),
     endpoint: core.getInput('endpoint'),
     config: core.getInput('config'),
-    configInline: core.getInput('config-inline')
+    configInline: core.getInput('config-inline'),
+    append: core.getInput('append')
   };
 }
 
@@ -63,6 +69,9 @@ export async function getCreateArgs(inputs: Inputs, buildxVersion: string): Prom
       args.push('--buildkitd-flags', inputs.buildkitdFlags);
     }
   }
+  if (inputs.platforms.length > 0) {
+    args.push('--platform', inputs.platforms.join(','));
+  }
   if (inputs.use) {
     args.push('--use');
   }
@@ -79,6 +88,28 @@ export async function getCreateArgs(inputs: Inputs, buildxVersion: string): Prom
   return args;
 }
 
+export async function getAppendArgs(inputs: Inputs, node: nodes.Node, buildxVersion: string): Promise<Array<string>> {
+  const args: Array<string> = ['create', '--name', inputs.name, '--append'];
+  if (node.name) {
+    args.push('--node', node.name);
+  }
+  if (node['driver-opts'] && buildx.satisfies(buildxVersion, '>=0.3.0')) {
+    await asyncForEach(node['driver-opts'], async driverOpt => {
+      args.push('--driver-opt', driverOpt);
+    });
+    if (inputs.driver != 'remote' && node['buildkitd-flags']) {
+      args.push('--buildkitd-flags', node['buildkitd-flags']);
+    }
+  }
+  if (node.platforms) {
+    args.push('--platform', node.platforms);
+  }
+  if (node.endpoint) {
+    args.push(node.endpoint);
+  }
+  return args;
+}
+
 export async function getInspectArgs(inputs: Inputs, buildxVersion: string): Promise<Array<string>> {
   const args: Array<string> = ['inspect', '--bootstrap'];
   if (buildx.satisfies(buildxVersion, '>=0.4.0')) {
@@ -88,14 +119,33 @@ export async function getInspectArgs(inputs: Inputs, buildxVersion: string): Pro
 }
 
 export async function getInputList(name: string, ignoreComma?: boolean): Promise<string[]> {
+  const res: Array<string> = [];
+
   const items = core.getInput(name);
   if (items == '') {
-    return [];
+    return res;
   }
-  return items
+
-    .split(/\r?\n/)
+  const records = parse(items, {
-    .filter(x => x)
+    columns: false,
-    .reduce<string[]>((acc, line) => acc.concat(!ignoreComma ? line.split(',').filter(x => x) : line).map(pat => pat.trim()), []);
+    relaxQuotes: true,
+    comment: '#',
+    relaxColumnCount: true,
+    skipEmptyLines: true
+  });
+
+  for (const record of records as Array<string[]>) {
+    if (record.length == 1) {
+      res.push(record[0]);
+      continue;
+    } else if (!ignoreComma) {
+      res.push(...record);
+      continue;
+    }
+    res.push(record.join(','));
+  }
+
+  return res.filter(item => item).map(pat => pat.trim());
 }
 
 export const asyncForEach = async (array, callback) => {

src/main.ts

@@ -5,6 +5,7 @@ import * as auth from './auth';
 import * as buildx from './buildx';
 import * as context from './context';
 import * as docker from './docker';
+import * as nodes from './nodes';
 import * as stateHelper from './state-helper';
 import * as util from './util';
 import * as core from '@actions/core';
@@ -71,6 +72,21 @@ async function run(): Promise<void> {
       core.endGroup();
     }
 
+    if (inputs.append) {
+      core.startGroup(`Appending node(s) to builder`);
+      let nodeIndex = 1;
+      for (const node of nodes.Parse(inputs.append)) {
+        const authOpts = auth.setCredentials(credsdir, nodeIndex, inputs.driver, node.endpoint || '');
+        if (authOpts.length > 0) {
+          node['driver-opts'] = [...(node['driver-opts'] || []), ...authOpts];
+        }
+        const appendCmd = buildx.getCommand(await context.getAppendArgs(inputs, node, buildxVersion), standalone);
+        await exec.exec(appendCmd.commandLine, appendCmd.args);
+        nodeIndex++;
+      }
+      core.endGroup();
+    }
+
     core.startGroup(`Booting builder`);
     const inspectCmd = buildx.getCommand(await context.getInspectArgs(inputs, buildxVersion), standalone);
     await exec.exec(inspectCmd.commandLine, inspectCmd.args);
@@ -88,9 +104,18 @@ async function run(): Promise<void> {
     core.startGroup(`Inspect builder`);
     const builder = await buildx.inspect(inputs.name, standalone);
     const firstNode = builder.nodes[0];
+    const reducedPlatforms: Array<string> = [];
+    for (const node of builder.nodes) {
+      for (const platform of node.platforms?.split(',') || []) {
+        if (reducedPlatforms.indexOf(platform) > -1) {
+          continue;
+        }
+        reducedPlatforms.push(platform);
+      }
+    }
     core.info(JSON.stringify(builder, undefined, 2));
     core.setOutput('driver', builder.driver);
-    core.setOutput('platforms', firstNode.platforms);
+    core.setOutput('platforms', reducedPlatforms.join(','));
     core.setOutput('nodes', JSON.stringify(builder.nodes, undefined, 2));
     core.setOutput('endpoint', firstNode.endpoint); // TODO: deprecated, to be removed in a later version
     core.setOutput('status', firstNode.status); // TODO: deprecated, to be removed in a later version

src/nodes.ts

@@ -0,0 +1,13 @@
+import * as yaml from 'js-yaml';
+
+export type Node = {
+  name?: string;
+  endpoint?: string;
+  'driver-opts'?: Array<string>;
+  'buildkitd-flags'?: string;
+  platforms?: string;
+};
+
+export function Parse(data: string): Node[] {
+  return yaml.load(data) as Node[];
+}

yarn.lock

@@ -1450,6 +1450,11 @@ cssstyle@^2.3.0:
   dependencies:
     cssom "~0.3.6"
 
+csv-parse@^5.1.0:
+  version "5.3.0"
+  resolved "https://registry.yarnpkg.com/csv-parse/-/csv-parse-5.3.0.tgz#85cc02fc9d1c89bd1b02e69069c960f8b8064322"
+  integrity sha512-UXJCGwvJ2fep39purtAn27OUYmxB1JQto+zhZ4QlJpzsirtSFbzLvip1aIgziqNdZp/TptvsKEV5BZSxe10/DQ==
+
 data-urls@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/data-urls/-/data-urls-2.0.0.tgz#156485a72963a970f5d5821aaf642bef2bf2db9b"