Add working-directory option

Signed-off-by: Danilo Tuler <tuler@pobox.com>

README.md

@@ -78,16 +78,17 @@ Following inputs can be used as `step.with` keys
 > targets: default,release
 > ```
 
-| Name             | Type     | Description                        |
-|------------------|----------|------------------------------------|
-| `builder`        | String   | Builder instance (see [setup-buildx](https://github.com/docker/setup-buildx-action) action) |
-| `files`          | List/CSV | List of [bake definition files](https://github.com/docker/buildx/blob/master/docs/reference/buildx_bake.md#file) |
-| `targets`        | List/CSV | List of bake targets |
-| `no-cache`       | Bool     | Do not use cache when building the image (default `false`) |
-| `pull`           | Bool     | Always attempt to pull a newer version of the image (default `false`) |
-| `load`           | Bool     | Load is a shorthand for `--set=*.output=type=docker` (default `false`) |
-| `push`           | Bool     | Push is a shorthand for `--set=*.output=type=registry` (default `false`) |
-| `set`            | List     | List of [targets values to override](https://github.com/docker/buildx/blob/master/docs/reference/buildx_bake.md#set) (eg: `targetpattern.key=value`) |
+| Name                | Type     | Description                        |
+|---------------------|----------|------------------------------------|
+| `builder`           | String   | Builder instance (see [setup-buildx](https://github.com/docker/setup-buildx-action) action) |
+| `files`             | List/CSV | List of [bake definition files](https://github.com/docker/buildx/blob/master/docs/reference/buildx_bake.md#file) |
+| `working-directory` | String   | Working directory of execution |
+| `targets`           | List/CSV | List of bake targets |
+| `no-cache`          | Bool     | Do not use cache when building the image (default `false`) |
+| `pull`              | Bool     | Always attempt to pull a newer version of the image (default `false`) |
+| `load`              | Bool     | Load is a shorthand for `--set=*.output=type=docker` (default `false`) |
+| `push`              | Bool     | Push is a shorthand for `--set=*.output=type=registry` (default `false`) |
+| `set`               | List     | List of [targets values to override](https://github.com/docker/buildx/blob/master/docs/reference/buildx_bake.md#set) (eg: `targetpattern.key=value`) |
 
 ### outputs
 

action.yml

@@ -13,6 +13,10 @@ inputs:
   files:
     description: "List of bake definition files"
     required: true
+  working-directory:
+    description: "Working directory of bake execution"
+    required: false
+    default: '.'
   targets:
     description: "List of bake targets"
     required: false

src/context.ts

@@ -12,6 +12,7 @@ let _tmpDir: string;
 export interface Inputs {
   builder: string;
   files: string[];
+  workingDirectory: string;
   targets: string[];
   noCache: boolean;
   pull: boolean;
@@ -35,6 +36,7 @@ export async function getInputs(): Promise<Inputs> {
   return {
     builder: core.getInput('builder'),
     files: getInputList('files'),
+    workingDirectory: core.getInput('working-directory') || '.',
     targets: getInputList('targets'),
     noCache: core.getBooleanInput('no-cache'),
     pull: core.getBooleanInput('pull'),

src/main.ts

@@ -44,11 +44,14 @@ async function run(): Promise<void> {
     const buildCmd = buildx.getCommand(args, standalone);
 
     core.startGroup(`Bake definition`);
-    await exec.exec(buildCmd.command, [...buildCmd.args, '--print']);
+    await exec.exec(buildCmd.command, [...buildCmd.args, '--print'], {
+      cwd: inputs.workingDirectory
+    });
     core.endGroup();
 
     await exec
       .getExecOutput(buildCmd.command, buildCmd.args, {
+        cwd: inputs.workingDirectory,
         ignoreReturnCode: true
       })
       .then(res => {