[jaeger] Add weekly workflow to auto-update Jaeger version from Docker Hub

.github/scripts/update-jaeger-version.sh

@@ -0,0 +1,145 @@
+#!/bin/bash
+# Script to check for new Jaeger Docker Hub releases and update Chart.yaml
+# Can be run standalone for testing or via the GitHub Actions workflow
+#
+# Usage: ./update-jaeger-version.sh [--dry-run]
+#
+# Environment variables:
+#   DRY_RUN - Set to 'true' to skip making changes (same as --dry-run flag)
+#   GITHUB_OUTPUT - If set, outputs will be written for GitHub Actions
+
+set -eo pipefail
+
+DOCKER_IMAGE="jaegertracing/jaeger"
+CHART_PATH="charts/jaeger/Chart.yaml"
+
+# Parse command line arguments
+for arg in "$@"; do
+  case $arg in
+    --dry-run)
+      DRY_RUN="true"
+      shift
+      ;;
+  esac
+done
+
+# Default DRY_RUN to false if not set
+DRY_RUN="${DRY_RUN:-false}"
+
+echo "1. Checking latest Docker tag for ${DOCKER_IMAGE}..."
+
+# --- 1. Get the latest semantic version tag by checking the digest of the 'latest' tag ---
+echo "   -> Fetching image digest for 'latest' tag..."
+# Get all digests from the 'latest' tag (multi-platform images have multiple digests)
+LATEST_RESPONSE=$(curl -sf "https://registry.hub.docker.com/v2/repositories/${DOCKER_IMAGE}/tags/latest")
+if [[ $? -ne 0 || -z "$LATEST_RESPONSE" ]]; then
+  echo "Error: Failed to fetch 'latest' tag from Docker Hub. Exiting."
+  exit 1
+fi
+
+LATEST_DIGESTS=$(echo "$LATEST_RESPONSE" | jq -r '.images[].digest | select(. != null)')
+
+if [[ -z "$LATEST_DIGESTS" ]]; then
+  echo "Error: Could not retrieve valid digests for the 'latest' tag. Exiting."
+  exit 1
+fi
+echo "   -> Latest digests found:"
+echo "$LATEST_DIGESTS" | head -3
+
+# Fetch a list of tags and filter to find the one that:
+# 1. Has any digest matching the 'latest' tag digests.
+# 2. Matches the semantic version pattern (e.g., 2.39.0).
+echo "   -> Searching through tags for a semantic version matching these digests..."
+TAGS_JSON=$(curl -sf "https://registry.hub.docker.com/v2/repositories/${DOCKER_IMAGE}/tags?page_size=100")
+if [[ $? -ne 0 || -z "$TAGS_JSON" ]]; then
+  echo "Error: Failed to fetch tags from Docker Hub. Exiting."
+  exit 1
+fi
+
+# Convert digests to a JSON array for jq comparison
+DIGESTS_ARRAY=$(echo "$LATEST_DIGESTS" | jq -R -s 'split("\n") | map(select(length > 0))')
+
+LATEST_TAG=$(echo "$TAGS_JSON" | \
+  jq -r --argjson digests "$DIGESTS_ARRAY" '
+    .results[] | 
+    select(.images | map(.digest) | any(. as $d | $digests | index($d))) | 
+    .name' | \
+  grep -E '^[0-9]+\.[0-9]+\.[0-9]+$' | \
+  head -n 1)
+
+if [[ -z "$LATEST_TAG" ]]; then
+  echo "Error: Could not find a matching semantic version tag in the first 100 results. Exiting."
+  exit 1
+fi
+
+echo "   -> Latest available version is: ${LATEST_TAG}"
+
+# --- 2. Get the current appVersion and version from Chart.yaml using grep/sed ---
+CURRENT_APP_VERSION=$(grep '^appVersion:' "$CHART_PATH" | sed 's/appVersion: *//' | tr -d '"')
+CURRENT_CHART_VERSION=$(grep '^version:' "$CHART_PATH" | sed 's/version: *//' | tr -d '"')
+
+echo "   -> Current appVersion in ${CHART_PATH} is: ${CURRENT_APP_VERSION}"
+echo "   -> Current chart version in ${CHART_PATH} is: ${CURRENT_CHART_VERSION}"
+
+# --- 3. Compare and determine if update is needed ---
+if [[ "$LATEST_TAG" == "$CURRENT_APP_VERSION" ]]; then
+  echo "Versions match. No update needed."
+  if [[ -n "$GITHUB_OUTPUT" ]]; then
+    echo "update_needed=false" >> "$GITHUB_OUTPUT"
+  fi
+  if [[ "$DRY_RUN" == "true" ]]; then
+    echo "=============================================="
+    echo "DRY RUN MODE - No changes needed"
+    echo "=============================================="
+  fi
+  exit 0
+fi
+
+echo "Update needed: appVersion change from ${CURRENT_APP_VERSION} to ${LATEST_TAG}."
+
+# --- 4. Calculate new chart version (bump minor version) ---
+# Validate that the current chart version follows semantic versioning (X.Y.Z)
+if ! [[ "$CURRENT_CHART_VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+  echo "Error: Current chart version '${CURRENT_CHART_VERSION}' does not match expected format X.Y.Z. Exiting."
+  exit 1
+fi
+
+# Parse the current chart version (e.g., 4.0.0 -> major=4, minor=0, patch=0)
+IFS='.' read -r MAJOR MINOR PATCH <<< "$CURRENT_CHART_VERSION"
+NEW_MINOR=$((MINOR + 1))
+NEW_CHART_VERSION="${MAJOR}.${NEW_MINOR}.0"
+
+echo "   -> New chart version will be: ${NEW_CHART_VERSION}"
+
+# Set outputs for GitHub Actions
+if [[ -n "$GITHUB_OUTPUT" ]]; then
+  echo "update_needed=true" >> "$GITHUB_OUTPUT"
+  echo "latest_tag=${LATEST_TAG}" >> "$GITHUB_OUTPUT"
+  echo "current_app_version=${CURRENT_APP_VERSION}" >> "$GITHUB_OUTPUT"
+  echo "current_chart_version=${CURRENT_CHART_VERSION}" >> "$GITHUB_OUTPUT"
+  echo "new_chart_version=${NEW_CHART_VERSION}" >> "$GITHUB_OUTPUT"
+fi
+
+# --- 5. Handle dry run mode ---
+if [[ "$DRY_RUN" == "true" ]]; then
+  echo "=============================================="
+  echo "DRY RUN MODE - No changes will be made"
+  echo "=============================================="
+  echo "Update IS needed:"
+  echo "  - appVersion: ${CURRENT_APP_VERSION} -> ${LATEST_TAG}"
+  echo "  - version: ${CURRENT_CHART_VERSION} -> ${NEW_CHART_VERSION}"
+  echo "=============================================="
+  exit 0
+fi
+
+# --- 6. Update Chart.yaml using sed ---
+echo "Updating ${CHART_PATH}..."
+
+# Update appVersion
+sed -i "s/^appVersion:.*/appVersion: ${LATEST_TAG}/" "$CHART_PATH"
+
+# Update version
+sed -i "s/^version:.*/version: ${NEW_CHART_VERSION}/" "$CHART_PATH"
+
+echo "Updated ${CHART_PATH}:"
+cat "$CHART_PATH"

.github/workflows/update-jaeger-version.yaml

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+name: Update Jaeger Version
+
+on:
+  schedule:
+    # Runs once a week on Monday at 00:00 UTC
+    - cron: '0 0 * * 1'
+  workflow_dispatch:
+    inputs:
+      dry_run:
+        description: 'Dry run mode - skip PR creation and only print status'
+        required: false
+        default: 'false'
+        type: boolean
+
+jobs:
+  update-jaeger-version:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    env:
+      # Use the dry_run input if it exists (workflow_dispatch).
+      # Otherwise, if the event is 'schedule' (or anything else), default to 'false'.
+      DRY_RUN: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.dry_run || 'false' }}
+    steps:
+      - name: ⬇️ Checkout repository
+        uses: actions/checkout@v4
+
+      - name: 🔍 Check for new Jaeger version
+        id: check_version
+        run: bash ./.github/scripts/update-jaeger-version.sh
+
+      - name: ⚙️ Configure Git
+        if: ${{ steps.check_version.outputs.update_needed == 'true' && env.DRY_RUN != 'true' }}
+        run: |
+          git config user.name "jaegertracingbot"
+          git config user.email "[email protected]"
+
+      - name: 📝 Commit changes
+        if: ${{ steps.check_version.outputs.update_needed == 'true' && env.DRY_RUN != 'true' }}
+        id: commit
+        run: |
+          CHART_PATH="charts/jaeger/Chart.yaml"
+
+          # Check if any changes exist before committing
+          if git diff --exit-code "$CHART_PATH"; then
+            echo "No changes to commit. Exiting."
+            echo "pr_needed=false" >> $GITHUB_OUTPUT
+          else
+            git add "$CHART_PATH"
+            git commit -m "chore(deps): Bump Jaeger to ${{ steps.check_version.outputs.latest_tag }}"
+
+            # Create and switch to a new topic branch for the PR
+            NEW_BRANCH="bot/update-jaeger-${{ steps.check_version.outputs.latest_tag }}"
+            git checkout -b "$NEW_BRANCH"
+
+            echo "pr_needed=true" >> $GITHUB_OUTPUT
+            echo "branch_name=${NEW_BRANCH}" >> $GITHUB_OUTPUT
+          fi
+
+      - name: 🚀 Push new branch
+        if: ${{ steps.commit.outputs.pr_needed == 'true' && env.DRY_RUN != 'true' }}
+        run: |
+          git push https://${{ secrets.JAEGERTRACINGBOT_PAT }}@github.com/${{ github.repository }} HEAD:${{ steps.commit.outputs.branch_name }}
+
+      - name: ✨ Create Pull Request
+        if: ${{ steps.commit.outputs.pr_needed == 'true' && env.DRY_RUN != 'true' }}
+        env:
+          GH_TOKEN: ${{ secrets.JAEGERTRACINGBOT_PAT }}
+        run: |
+          gh pr create \
+            --title "chore(deps): Bump Jaeger to ${{ steps.check_version.outputs.latest_tag }}" \
+            --body "This PR was automatically generated to update the Jaeger Helm chart.
+
+          ## Changes
+          - **appVersion**: \`${{ steps.check_version.outputs.current_app_version }}\` → \`${{ steps.check_version.outputs.latest_tag }}\`
+          - **version**: \`${{ steps.check_version.outputs.current_chart_version }}\` → \`${{ steps.check_version.outputs.new_chart_version }}\`
+
+          ## Source
+          Docker Hub image: [jaegertracing/jaeger](https://hub.docker.com/r/jaegertracing/jaeger)" \
+            --base main \
+            --head ${{ steps.commit.outputs.branch_name }}