ci: Add Github action to add "has:owner-approval" label for approved PRs

.github/workflows/pr-review.yml

@@ -0,0 +1,22 @@
+name: PR review
+# This workflow is triggered when a PR review is submitted. It checks if the review is approved and runs a script to add labels to the PR based on the review.
+on:
+  pull_request_review:
+    types:
+      - submitted
+
+jobs:
+  add-owner-approved-label:
+    if: github.event.review.state == 'approved'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Run add-labels-to-reviewed-pr.sh
+        run: ./.github/workflows/scripts/add-labels-to-reviewed-pr.sh
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          REPO: ${{ github.repository }}
+          PR: ${{ github.event.number }}
+

.github/workflows/scripts/add-labels-to-reviewed-pr.sh

@@ -0,0 +1,75 @@
+#!/usr/bin/env bash
+#
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Adds a "has:owner-approval" label to a PR if a reviewer who approved it is a component owner.
+
+set -euo pipefail
+
+if [[ -z "${REPO:-}" || -z "${PR:-}" ]]; then
+    echo "One or more of REPO and PR have not been set. Please ensure each is set."
+    exit 0
+fi
+
+main () {
+    CUR_DIRECTORY=$(dirname "$0")
+
+    # The latestReviews key returns the latest review for each reviewer cutting out any other reviews.
+    JSON=$(gh pr view "${PR}" --json "files,author,latestReviews" | tr -dc '[:print:]' | sed -E 's/\\[a-z]//g')
+    FILES=$(echo -n "${JSON}"| jq -r '.files[].path')
+    LATEST_REVIEWS=$(echo -n "${JSON}" | jq -c '.latestReviews')
+
+    # Fetch components
+    COMPONENTS=$(bash "${CUR_DIRECTORY}/get-components.sh" | tac) # Reversed so we visit subdirectories first
+
+    declare -A PROCESSED_COMPONENTS
+
+    for COMPONENT in ${COMPONENTS}; do
+        COMPONENT_OWNERS=$(COMPONENT="${COMPONENT}" bash "${CUR_DIRECTORY}/get-codeowners.sh")
+
+        for FILE in ${FILES}; do
+            MATCH=$(echo -n "${FILE}" | grep -E "^${COMPONENT}" || true)
+
+            if [[ -z "${MATCH}" ]]; then
+                continue
+            fi
+
+            # If we match a file with a component, skip further processing for this file
+            if [[ -v PROCESSED_COMPONENTS["${COMPONENT}"] ]]; then
+                continue
+            fi
+            PROCESSED_COMPONENTS["${COMPONENT}"]=true
+
+            # Check if updated file is owned by one of the reviewers"
+            echo "${LATEST_REVIEWS}" | jq -c '.[]' | while IFS= read -r REVIEW; do
+                REVIEW_AUTHOR=$(echo -n "${REVIEW}"| jq -r '.author.login')
+                REVIEW_STATE=$(echo -n "${REVIEW}"| jq -r '.state')
+                if [[ "${REVIEW_STATE}" == "APPROVED" ]]; then
+                    # Review is approved. Checking if reviewer is a component owner
+                    for OWNER in ${COMPONENT_OWNERS}; do
+                        if [[ "${REVIEW_AUTHOR}" == "${OWNER}" ]]; then
+                            echo "Reviewer $REVIEW_AUTHOR is a component owner. Adding 'has:owner-approval' label."
+                            gh pr edit "${PR}" --repo "${REPO}" --add-label "has:owner-approval"
+                            exit 0
+                        fi
+                    done
+                fi
+            done
+        done
+    done
+}
+
+# Ensure the script does not block a PR even if it fails
+main || echo "Failed to run $0"

.github/workflows/scripts/get-codeowners.sh

@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+#
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Gets the owners for a given component from the component_owners.yml file.
+
+# Define the file path
+YML_FILE=".github/component_owners.yml"
+
+if [[ -z "${COMPONENT:-}" ]]; then
+    echo "COMPONENT has not been set, please ensure it is set."
+    exit 1
+fi
+
+FOUND=0
+
+# Parse the YAML file and extract owners for the given component
+while IFS= read -r line; do
+    # Check if the line matches the given component
+    if [[ "$line" =~ ^[[:space:]]*${COMPONENT}:[[:space:]]*$ ]]; then
+        FOUND=1
+        continue
+    fi
+
+    # If the component is found, extract owners
+    if [[ $FOUND -eq 1 ]]; then
+        # Stop if we encounter another component or an empty line
+        if [[ "$line" =~ ^[[:space:]]*[^#]+: || -z "$line" ]]; then
+            break
+        fi
+
+        # Extract the owner (remove leading spaces and '- ')
+        if [[ "$line" =~ ^[[:space:]]*-[[:space:]]*[^#]+ ]]; then
+            OWNER=$(echo "$line" | sed -E 's/^[[:space:]]*-[[:space:]]*([^#]+).*/\1/')
+            echo "$OWNER"
+        fi
+    fi
+done < "$YML_FILE"

.github/workflows/scripts/get-components.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+#
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Gets the components from the component_owners.yml file.
+
+
+# Define the file path
+YML_FILE=".github/component_owners.yml"
+
+# Parse the YAML file and extract components and their owners
+while IFS= read -r line; do
+    # Check if the line contains a component (ends with ':')
+    if [[ "$line" =~ ^[[:space:]]*[^#]+: ]]; then
+        # Extract the component name (remove leading spaces and trailing ':')
+        COMPONENT=$(echo "$line" | sed -E 's/^[[:space:]]*([^:]+):.*/\1/')
+        echo "$COMPONENT"
+    fi
+done < "$YML_FILE"