extract-docker-images.js

@@ -0,0 +1,41 @@
+const fs = require('fs');
+const yaml = require('js-yaml');
+
+module.exports = function extractDockerImages(fileContent) {
+  const result = [];
+
+  try {
+    const doc = yaml.load(fileContent, { schema: yaml.DEFAULT_SCHEMA });
+
+    if (!doc.services) return [];
+
+    for (const [serviceName, serviceDef] of Object.entries(doc.services)) {
+      let image = serviceDef.image;
+
+      // Resolve anchors/merges if image is not directly present
+      if (!image && serviceDef['<<']) {
+        const merge = serviceDef['<<'];
+        if (Array.isArray(merge)) {
+          merge.forEach(m => {
+            if (m.image) image = m.image;
+          });
+        } else if (merge.image) {
+          image = merge.image;
+        }
+      }
+
+      if (image) {
+        const [depName, currentValue] = image.split(':');
+        result.push({
+          depName: depName,
+          currentValue: currentValue || 'latest',
+          service: serviceName // <- added for Renovate PR title
+        });
+      }
+    }
+  } catch (err) {
+    console.error('Failed parsing docker-compose.yml:', err);
+  }
+
+  return result;
+};

renovate.json

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+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["config:recommended"],
+  "prHourlyLimit": 2,
+  "prConcurrentLimit": 5,
+  "dependencyDashboard": true,
+  "labels": ["dependencies", "renovate"],
+  "schedule": ["before 6am on monday"],
+
+  "docker": {
+    "enabled": true
+  },
+
+  "packageRules": [
+    {
+      "matchDatasources": ["docker"],
+      "matchPackageNames": ["clickhouse/clickhouse-server"],
+      "enabled": false
+    },
+    {
+      "matchDatasources": ["docker"],
+      "matchPackagePatterns": [".*-alpine$"],
+      "allowedVersions": "/.*-alpine$/"
+    },
+    {
+      "matchDatasources": ["docker"],
+      "matchPackagePatterns": ["^.*:latest$"],
+      "enabled": false
+    },
+    {
+      "matchDatasources": ["docker"],
+      "description": "Docker image used by service {{service}} ({{depName}})"
+    }
+  ],
+
+  "regexManagers": [],
+
+  "packageFiles": [
+    {
+      "fileMatch": ["docker-compose\\.ya?ml$"],
+      "manager": "regex",
+      "extractVersion": "custom",
+      "datasourceTemplate": "docker",
+      "depNameTemplate": "{{service}}/{{depName}}",
+      "versioningTemplate": "docker",
+      "extractor": "file:extract-docker-images.js"
+    }
+  ],
+
+  "branchNameStrict": true,
+  "branchPrefix": "renovate/",
+  "branchName": "{{service}}/{{depName}}-{{newVersion}}",
+
+  "commitMessageAction": "Update",
+  "commitMessageTopic": "{{service}}/{{depName}}",
+  "commitMessageExtra": "{{currentValue}} → {{newVersion}}"
+}