From 0d4e5f48e91a7ca5d28f4efef8d16936beaa3ec1 Mon Sep 17 00:00:00 2001
From: Trask Stalnaker <trask.stalnaker@gmail.com>
Date: Mon, 4 Aug 2025 12:57:44 -0700
Subject: [PATCH] Auto assign issues based on `component:*` label (#2063)

---
 .github/component_owners.yml              |  6 +-
 .github/workflows/assign-issue-owners.yml | 75 +++++++++++++++++++++++
 2 files changed, 78 insertions(+), 3 deletions(-)
 create mode 100644 .github/workflows/assign-issue-owners.yml

diff --git a/.github/component_owners.yml b/.github/component_owners.yml
index d732f3e0..1e4c90e1 100644
--- a/.github/component_owners.yml
+++ b/.github/component_owners.yml
@@ -1,14 +1,14 @@
-# this file is used by .github/workflows/assign-reviewers.yml
+# this file is used by .github/workflows/assign-reviewers.yml and .github/workflows/assign-issue-owners.yml
 #
 # NOTE component owners must be members of the GitHub OpenTelemetry organization
 # so that they can be added to @open-telemetry/java-contrib-triagers
-# which in turn is required for them to be auto-assigned as reviewers by the automation
+# which in turn is required for them to be auto-assigned as reviewers and issue assignees by the automation
 #
 # NOTE when updating this file, don't forget to update the README.md files in the associated
 # components also
 #
 # NOTE when adding/updating one of the component names, don't forget to update the associated
-# `comp:*` labels
+# `component:*` labels (used for both PR reviews and issue assignment)
 components:
   aws-resources:
     - wangzlei
diff --git a/.github/workflows/assign-issue-owners.yml b/.github/workflows/assign-issue-owners.yml
new file mode 100644
index 00000000..085eeb6f
--- /dev/null
+++ b/.github/workflows/assign-issue-owners.yml
@@ -0,0 +1,75 @@
+---
+name: Assign issue owners
+
+on:
+  issues:
+    types: [labeled]
+
+permissions:
+  contents: read
+
+jobs:
+  assign-owners:
+    permissions:
+      contents: read
+      issues: write
+    runs-on: ubuntu-latest
+    if: startsWith(github.event.label.name, 'component:')
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+
+      - name: Parse component label and assign owners
+        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
+        with:
+          script: |
+            const fs = require('fs');
+            const yaml = require('js-yaml');
+
+            // Extract component name from label
+            const labelName = context.payload.label.name;
+
+            if (!labelName.startsWith('component:')) {
+              core.setFailed('Label does not match expected pattern');
+              return;
+            }
+
+            const componentName = labelName.replace('component:', '');
+            console.log(`Processing component: ${componentName}`);
+
+            // Read and parse component_owners.yml
+            const yamlContent = fs.readFileSync('.github/component_owners.yml', 'utf8');
+            const data = yaml.load(yamlContent);
+
+            if (!data || !data.components) {
+              core.setFailed('Invalid component_owners.yml structure');
+              return;
+            }
+
+            const components = data.components;
+
+            if (!(componentName in components)) {
+              core.setFailed(`Component '${componentName}' not found in component_owners.yml`);
+              return;
+            }
+
+            const owners = components[componentName];
+
+            if (!owners || owners.length === 0) {
+              core.setFailed(`No owners found for component '${componentName}'`);
+              return;
+            }
+
+            console.log(`Found owners: ${owners.join(', ')}`);
+
+            // Assign the issue to the owners
+            const issueNumber = context.payload.issue.number;
+
+            await github.rest.issues.addAssignees({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: issueNumber,
+              assignees: owners
+            });
+
+            console.log(`Successfully assigned issue #${issueNumber} to ${owners.join(', ')}`);