Add configFile option

.devcontainer/devcontainer-lock.json

@@ -0,0 +1,9 @@
+{
+  "features": {
+    "ghcr.io/devcontainers/features/github-cli:1": {
+      "version": "1.0.11",
+      "resolved": "ghcr.io/devcontainers/features/github-cli@sha256:464564228ccdd6028f01f8a62a3cfbaf76e9ba7953b29ac0e53ba2c262604312",
+      "integrity": "sha256:464564228ccdd6028f01f8a62a3cfbaf76e9ba7953b29ac0e53ba2c262604312"
+    }
+  }
+}

.github/workflows/ci_common.yml

@@ -452,6 +452,45 @@ jobs:
         env:
           runCmdOutput: ${{ steps.simpletest.outputs.runCmdOutput }}
 
+  test-config-file:
+    name: Run test with config file
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          persist-credentials: false
+          # if the following value is missing (i.e. not triggered via comment workflow)
+          # then the default checkout will apply
+          ref: ${{ inputs.prRef }}
+
+      # Published action contains compiled JS, but we need to compile it here
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 20
+      - name: Compile GH action
+        run: |
+          (cd common && npm install && npm run build)
+          (cd github-action/ && npm install && npm run build && npm run package)
+
+      - name: Run test
+        uses: ./
+        id: configfiletest
+        with:
+          subFolder: github-tests/Dockerfile/config-file
+          configFile: github-tests/Dockerfile/config-file/.devcontainer/subfolder/devcontainer.json
+          runCmd: echo $HOSTNAME && [[ $HOSTNAME == "my-host" ]]
+      - name: Validate runCmdOutput output
+        run: |
+          echo "'runCmdOutput' value: $runCmdOutput"
+          if [["$runCmdOutput" = *my-host*]]; then
+            echo "'runCmdOutput' output of configfiletest step doesn't contain expected value 'my-host'"
+            exit 1
+          fi
+        env:
+          runCmdOutput: ${{ steps.configfiletest.outputs.runCmdOutput }}
+
   test-gh-run-args:
     name: Run GitHub run-args test
     runs-on: ubuntu-latest

azdo-task/DevcontainersCi/src/main.ts

@@ -41,6 +41,7 @@ export async function runMain(): Promise<void> {
 		const imageTag = task.getInput('imageTag');
 		const platform = task.getInput('platform');
 		const subFolder = task.getInput('subFolder') ?? '.';
+		const relativeConfigFile = task.getInput('configFile');
 		const runCommand = task.getInput('runCmd');
 		const envs = task.getInput('env')?.split('\n') ?? [];
 		const inputEnvsWithDefaults = populateDefaults(envs);
@@ -62,6 +63,7 @@ export async function runMain(): Promise<void> {
 
 		const log = (message: string): void => console.log(message);
 		const workspaceFolder = path.resolve(checkoutPath, subFolder);
+		const configFile = relativeConfigFile && path.resolve(checkoutPath, relativeConfigFile);
 
 		const resolvedImageTag = imageTag ?? 'latest';
 		const imageTagArray = resolvedImageTag.split(',');
@@ -91,6 +93,7 @@ export async function runMain(): Promise<void> {
 		}
 		const buildArgs: DevContainerCliBuildArgs = {
 			workspaceFolder,
+			configFile,
 			imageName: fullImageNameArray,
 			platform,
 			additionalCacheFroms: cacheFrom,
@@ -120,6 +123,7 @@ export async function runMain(): Promise<void> {
 			console.log('***');
 			const upArgs: DevContainerCliUpArgs = {
 				workspaceFolder,
+				configFile,
 				additionalCacheFroms: cacheFrom,
 				skipContainerUserIdUpdate,
 				env: inputEnvsWithDefaults,
@@ -141,6 +145,7 @@ export async function runMain(): Promise<void> {
 			console.log('***');
 			const execArgs: DevContainerCliExecArgs = {
 				workspaceFolder,
+				configFile,
 				command: ['bash', '-c', runCommand],
 				env: inputEnvsWithDefaults,
 			};

azdo-task/DevcontainersCi/task.json

@@ -46,6 +46,12 @@
       "label": "Specify the command to run after building the dev container image",
       "required": false
     },
+    {
+      "name": "configFile",
+      "type": "string",
+      "label": "Specify the path to a devcontainer.json file instead of using `./.devcontainer/devcontainer.json` or `./.devcontainer.json`.",
+      "required": false
+    },
     {
       "name": "subFolder",
       "type": "string",

azdo-task/README.md

@@ -71,6 +71,7 @@ In the example above, the devcontainer-build-run will perform the following step
 | imageName                 | true     | Image name to use when building the dev container image (including registry)                                                                                                                                                                                     |
 | imageTag                  | false    | One or more comma-separated image tags (defaults to `latest`)                                                                                                                                                                                                    |
 | subFolder                 | false    | Use this to specify the repo-relative path to the folder containing the dev container (i.e. the folder that contains the `.devcontainer` folder). Defaults to repo root                                                                                          |
+| configFile                | false    | Use this to specify the repo-relative path to the devcontainer.json file. Defaults to `./.devcontainer/devcontainer.json` and `./.devcontainer.json`. |
 | runCmd                    | true     | The command to run after building the dev container image                                                                                                                                                                                                        |
 | env                       | false    | Specify environment variables to pass to the dev container when run                                                                                                                                                                                              |
 | push                      | false    | One of: `never`, `filter`, `always`. When set to `filter`, the image if pushed if the `sourceBranchFilterForPush`, `buildReasonsForPush`, and `pushOnFailedBuild` conditions are met. Defaults to `filter` if `imageName` is set, `never` otherwise.             |

common/src/dev-container-cli.ts

@@ -152,6 +152,7 @@ export interface DevContainerCliBuildResult
   extends DevContainerCliSuccessResult {}
 export interface DevContainerCliBuildArgs {
   workspaceFolder: string;
+  configFile: string | undefined;
   imageName?: string[];
   platform?: string;
   additionalCacheFroms?: string[];
@@ -168,6 +169,9 @@ async function devContainerBuild(
     '--workspace-folder',
     args.workspaceFolder,
   ];
+  if (args.configFile) {
+    commandArgs.push('--config', args.configFile);
+  }
   if (args.imageName) {
     args.imageName.forEach(iName =>
       commandArgs.push('--image-name', iName),
@@ -203,6 +207,7 @@ export interface DevContainerCliUpResult extends DevContainerCliSuccessResult {
 }
 export interface DevContainerCliUpArgs {
   workspaceFolder: string;
+  configFile: string | undefined;
   additionalCacheFroms?: string[];
   skipContainerUserIdUpdate?: boolean;
   env?: string[];
@@ -220,6 +225,9 @@ async function devContainerUp(
     args.workspaceFolder,
     ...remoteEnvArgs,
   ];
+  if (args.configFile) {
+    commandArgs.push('--config', args.configFile);
+  }
   if (args.additionalCacheFroms) {
     args.additionalCacheFroms.forEach(cacheFrom =>
       commandArgs.push('--cache-from', cacheFrom),
@@ -245,6 +253,7 @@ async function devContainerUp(
 
 export interface DevContainerCliExecArgs {
   workspaceFolder: string;
+  configFile: string | undefined;
   command: string[];
   env?: string[];
   userDataFolder?: string;
@@ -255,12 +264,15 @@ async function devContainerExec(
 ): Promise<number | null> {
   // const remoteEnvArgs = args.env ? args.env.flatMap(e=> ["--remote-env", e]): []; // TODO - test flatMap again
   const remoteEnvArgs = getRemoteEnvArray(args.env);
-  const commandArgs = ["exec", "--workspace-folder", args.workspaceFolder, ...remoteEnvArgs, ...args.command];
+  const commandArgs = ["exec", "--workspace-folder", args.workspaceFolder, ...remoteEnvArgs];
+  if (args.configFile) {
+    commandArgs.push('--config', args.configFile);
+  }
   if (args.userDataFolder) {
     commandArgs.push("--user-data-folder", args.userDataFolder);
   }
   return await runSpecCliNonJsonCommand({
-    args: commandArgs,
+    args: commandArgs.concat(args.command),
     log,
     env: {DOCKER_BUILDKIT: '1', COMPOSE_DOCKER_CLI_BUILD: '1'},
   });

docs/azure-devops-task.md

@@ -71,6 +71,7 @@ In the example above, the devcontainer-build-run will perform the following step
 | imageName                 | true     | Image name to use when building the dev container image (including registry)                                                                                                                                                                                     |
 | imageTag                  | false    | One or more comma-separated image tags (defaults to `latest`)                                                                                                                                                                                                    |
 | subFolder                 | false    | Use this to specify the repo-relative path to the folder containing the dev container (i.e. the folder that contains the `.devcontainer` folder). Defaults to repo root                                                                                          |
+| configFile                | false    | Use this to specify the repo-relative path to the devcontainer.json file. Defaults to `./.devcontainer/devcontainer.json` and `./.devcontainer.json`. |
 | runCmd                    | true     | The command to run after building the dev container image                                                                                                                                                                                                        |
 | env                       | false    | Specify environment variables to pass to the dev container when run                                                                                                                                                                                              |
 | push                      | false    | One of: `never`, `filter`, `always`. When set to `filter`, the image if pushed if the `sourceBranchFilterForPush`, `buildReasonsForPush`, and `pushOnFailedBuild` conditions are met. Defaults to `filter` if `imageName` is set, `never` otherwise.             |

docs/github-action.md

@@ -130,6 +130,7 @@ The [`devcontainers/ci` action](https://github.com/marketplace/actions/devcontai
 | imageName                 | true     | Image name to use when building the dev container image (including registry)                                                                                                                                                                   |
 | imageTag                  | false    | One or more comma-separated image tags (defaults to `latest`)                                                                                                                                                                                  |
 | subFolder                 | false    | Use this to specify the repo-relative path to the folder containing the dev container (i.e. the folder that contains the `.devcontainer` folder). Defaults to repo root                                                                        |
+| configFile                | false    | Use this to specify the repo-relative path to the devcontainer.json file. Defaults to `./.devcontainer/devcontainer.json` and `./.devcontainer.json`. |
 | runCmd                    | true     | The command to run after building the dev container image                                                                                                                                                                                      |
 | env                       | false    | Specify environment variables to pass to the dev container when run                                                                                                                                                                            |
 | checkoutPath              | false    | Only used for development/testing                                                                                                                                                                                                              |

github-action/src/main.ts

@@ -48,6 +48,7 @@ export async function runMain(): Promise<void> {
 		const imageTag = emptyStringAsUndefined(core.getInput('imageTag'));
 		const platform = emptyStringAsUndefined(core.getInput('platform'));
 		const subFolder: string = core.getInput('subFolder');
+		const relativeConfigFile = emptyStringAsUndefined(core.getInput('configFile'));
 		const runCommand = core.getInput('runCmd');
 		const inputEnvs: string[] = core.getMultilineInput('env');
 		const inputEnvsWithDefaults = populateDefaults(inputEnvs);
@@ -72,6 +73,7 @@ export async function runMain(): Promise<void> {
 
 		const log = (message: string): void => core.info(message);
 		const workspaceFolder = path.resolve(checkoutPath, subFolder);
+		const configFile = relativeConfigFile && path.resolve(checkoutPath, relativeConfigFile);
 
 		const resolvedImageTag = imageTag ?? 'latest';
 		const imageTagArray = resolvedImageTag.split(',');
@@ -108,6 +110,7 @@ export async function runMain(): Promise<void> {
 		const buildResult = await core.group('🏗️ build container', async () => {
 			const args: DevContainerCliBuildArgs = {
 				workspaceFolder,
+				configFile,
 				imageName: fullImageNameArray,
 				platform,
 				additionalCacheFroms: cacheFrom,
@@ -142,6 +145,7 @@ export async function runMain(): Promise<void> {
 			const upResult = await core.group('🏃 start container', async () => {
 				const args: DevContainerCliUpArgs = {
 					workspaceFolder,
+					configFile,
 					additionalCacheFroms: cacheFrom,
 					skipContainerUserIdUpdate,
 					env: inputEnvsWithDefaults,
@@ -166,6 +170,7 @@ export async function runMain(): Promise<void> {
 				async () => {
 					const args: DevContainerCliExecArgs = {
 						workspaceFolder,
+						configFile,
 						command: ['bash', '-c', runCommand],
 						env: inputEnvsWithDefaults,
 						userDataFolder,

github-tests/Dockerfile/config-file/.devcontainer/subfolder/devcontainer.json

@@ -0,0 +1,6 @@
+{
+	"name": "config-file",
+	"image": "mcr.microsoft.com/devcontainers/base:jammy",
+	"runArgs": [
+		"--hostname", "my-host"
+	]}