added custom directory (#1)

README.md

@@ -16,6 +16,7 @@ For more information on these inputs, see the [Workflow syntax for GitHub Action
 - `artifact-name`: The GitHub artifact name of the generated HTML report. For example, `code-coverage-report`. _Note:_ When downloading, it will be extracted in an `html` directory
 - `minimum-coverage`: The minimum coverage to pass the check. Optional. Default: `0` (always passes)
 - `github-token`: Set the `${{ secrets.GITHUB_TOKEN }}` token to have the action comment the coverage summary in the pull request. This token is provided by Actions, you do not need to create your own token. Optional. Default: ``
+- `working-directory`: The working directory containing the source files referenced in the LCOV files. Optional. Default: `./`
 
 ### Outputs
 None.
@@ -46,6 +47,7 @@ jobs:
         minimum-coverage: 90
         artifact-name: code-coverage-report
         github-token: ${{ secrets.GITHUB_TOKEN }}
+        working-directory: apps/my-first-app
 ```
 
 ### Flutter Workflows

action.yml

@@ -15,6 +15,8 @@ inputs:
     default: 0
   github-token:
     description: 'Set the GitHub token to have the action comment the coverage summary in the pull request. This token is provided by Actions, you do not need to create your own token. Optional. Default: ``'
+  working-directory:
+    description: 'The working directory containing the source files referenced in the LCOV files. Optional. Default: `./`'
 runs:
   using: 'node12'
   main: 'dist/main/index.js'

src/main.js

@@ -54,14 +54,15 @@ async function run() {
 }
 
 async function genhtml(coverageFiles, tmpPath) {
+  const workingDirectory = core.getInput('working-directory').trim() || './';
   const artifactName = core.getInput('artifact-name').trim();
   const artifactPath = path.resolve(tmpPath, 'html').trim();
   const args = [...coverageFiles];
 
   args.push('--output-directory');
   args.push(artifactPath);
 
-  await exec.exec('genhtml', args);
+  await exec.exec('genhtml', args, { cwd: workingDirectory });
 
   const globber = await glob.create(`${artifactPath}/**`);
   const htmlFiles = await globber.glob();