Initial test of download previous artifacts.

github/github-download-previous-artifacts/action.yaml

@@ -0,0 +1,38 @@
+name: github-download-previous-artifacts
+description: "Download artifacts from a previous Workflow run."
+inputs:
+  workflowPattern:
+    description: "Pattern of the workflow name to match."
+    required: true
+  filePattern:
+    description: "Pattern of the artifacts to match."
+    required: true
+    default: "*"
+  artifactName:
+    description: "Name of the artifact when it is downloaded. If not specified, the artifact will be named what the artifact is named."
+    required: false
+    default: ""
+  unzipDir:
+    description: "Directory to unzip the artifacts into. If not specified, the artifacts will not be unzipped."
+    required: false
+    default: ""
+outputs:
+  query:
+    description: "The query result."
+    value: ${{ steps.query.outputs.console }}
+runs:
+  using: "composite"
+  steps:
+  - name: "Download artifacts."
+    uses: https://github.com/actions/github-script@v6
+    continue-on-error: true
+    env:
+      WORKFLOW_FILENAME: ${{ inputs.workflowPattern }}
+      ARTIFACT_NAME: ${{ inputs.filePattern }}
+      ARTIFACT_FILENAME: ${{ inputs.artifactName }}
+      UNZIP_DIR: ${{ inputs.unzipDir }}
+    with:
+      script: |
+        const script = require('${{ github.action_path }}/download-previous-artifact.js')
+        await script({github, context, core})
+      shell: node

github/github-download-previous-artifacts/download-previous-artifacts.js

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+module.exports = async ({
+    github,
+    context,
+    core
+}) => {
+    const owner = context.repo.owner;
+    const repo = context.repo.repo;
+
+    // See: https://docs.github.com/en/rest/actions/workflows?apiVersion=2022-11-28#list-repository-workflows
+    const workflows = await github.rest.actions.listRepoWorkflows({
+        owner,
+        repo
+    })
+
+    const workflow = workflows.data.workflows.find(w => w.path.includes(process.env.WORKFLOW_FILENAME));
+
+    if (!workflow) {
+        core.setFailed("No matching workflow found.");
+        return;
+    }
+
+    // See: https://docs.github.com/en/rest/actions/workflow-runs?apiVersion=2022-11-28#list-workflow-runs-for-a-repository
+    const runs = await github.rest.actions.listWorkflowRuns({
+        owner,
+        repo,
+        workflow_id: workflow.id,
+        status: "success",
+        per_page: 1
+    })
+
+    if (runs.data.total_count === 0) {
+        core.setFailed("No workflow runs found.");
+        return;
+    }
+
+    // See: https://docs.github.com/en/rest/actions/artifacts?apiVersion=2022-11-28#list-workflow-run-artifacts
+    const artifacts = await github.rest.actions.listWorkflowRunArtifacts({
+        owner,
+        repo,
+        run_id: runs.data.workflow_runs[0].id
+    });
+
+    // Other formats are not supported by the GitHub API for downloading artifacts.
+    const extension = "zip"
+    const artifact = artifacts.data.artifacts.find(artifact => artifact.name === process.env.ARTIFACT_NAME);
+    if (artifact) {
+        // See: https://docs.github.com/en/rest/actions/artifacts?apiVersion=2022-11-28#download-an-artifact
+        const response = await github.rest.actions.downloadArtifact({
+            owner,
+            repo,
+            artifact_id: artifact.id,
+            archive_format: extension
+        });
+
+        const artifactFilename = process.env.ARTIFACT_FILENAME || `${artifact.name}.${extension}`;
+        require('fs').writeFileSync(artifactFilename, Buffer.from(response.data));
+        console.log("Artifact downloaded successfully.");
+        const unzip_dir = process.env.UNZIP_DIR;
+        if (unzip_dir) {
+            console.log("Unzipping artifact to directory: %s", unzip_dir);
+            require('child_process').execSync(`unzip -o ${artifactFilename} -d ${process.env.UNZIP_DIR}`);
+        }
+
+    } else {
+        core.setFailed("No artifact found.");
+    }
+}