CCM-18532: Added bundle analysis action

.github/actions/bundle-analysis/action.yaml

@@ -0,0 +1,51 @@
+name: "Bundle Size Analysis"
+description: "Analyses esbuild bundle sizes, compares with baseline, and posts a sticky PR comment with the results."
+
+inputs:
+  baseline-metafiles-dir:
+    description: "Path to directory containing baseline metafiles organised as <lambda-name>/meta.json"
+    required: true
+  current-metafiles-dir:
+    description: "Path to directory containing current metafiles organised as <lambda-name>/meta.json"
+    required: true
+  threshold:
+    description: "Variance threshold percentage — changes within ±threshold are marked as unchanged"
+    required: false
+    default: "5"
+  pr-number:
+    description: "The pull request number to post the comment on"
+    required: true
+  github-token:
+    description: "GitHub token with pull-requests: write scope"
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+    - name: "Run bundle analysis"
+      shell: bash
+      env:
+        BASELINE_DIR: ${{ inputs.baseline-metafiles-dir }}
+        CURRENT_DIR: ${{ inputs.current-metafiles-dir }}
+        OUTPUT_DIR: /tmp/bundle-analysis-output
+        THRESHOLD: ${{ inputs.threshold }}
+        TOOL_DIR: ${{ github.action_path }}/../../../tools/bundle-analysis
+      run: ${{ github.action_path }}/bundle-analysis.sh
+
+    - name: "Write detailed report to job summary"
+      shell: bash
+      run: cat /tmp/bundle-analysis-output/detailed-report.md >> "$GITHUB_STEP_SUMMARY"
+
+    - name: "Substitute report link in summary"
+      shell: bash
+      run: |
+        report_link="${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+        sed -i "s|{{REPORT_LINK}}|${report_link}|g" /tmp/bundle-analysis-output/summary.md
+
+    - name: "Post or update PR comment"
+      uses: marocchino/sticky-pull-request-comment@5770ad5eb8f42dd2c4f34da00c94c5381e49af88 # v3.0.5
+      with:
+        header: bundle-analysis
+        number: ${{ inputs.pr-number }}
+        GITHUB_TOKEN: ${{ inputs.github-token }}
+        path: /tmp/bundle-analysis-output/summary.md

.github/actions/bundle-analysis/bundle-analysis.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+set -euo pipefail
+
+function main() {
+  if [[ -z "${TOOL_DIR:-}" ]]; then
+    echo "ERROR: TOOL_DIR is not set" >&2
+    exit 1
+  fi
+
+  if [[ ! -d "${TOOL_DIR}" ]]; then
+    echo "ERROR: Tool directory does not exist: ${TOOL_DIR}" >&2
+    exit 1
+  fi
+
+  echo "Installing bundle-analysis dependencies..."
+  (cd "${TOOL_DIR}" && npm ci)
+
+  echo "Running bundle analysis..."
+  (cd "${TOOL_DIR}" && npm run analyse -- \
+    --baseline-dir="${BASELINE_DIR}" \
+    --current-dir="${CURRENT_DIR}" \
+    --output-dir="${OUTPUT_DIR}" \
+    --threshold="${THRESHOLD}")
+}
+
+main

tools/bundle-analysis/eslint.config.mjs

@@ -0,0 +1,65 @@
+import js from "@eslint/js";
+import jest from "eslint-plugin-jest";
+import security from "eslint-plugin-security";
+import sonarjs from "eslint-plugin-sonarjs";
+import unicorn from "eslint-plugin-unicorn";
+import globals from "globals";
+import tseslint from "typescript-eslint";
+
+export default tseslint.config(
+  {
+    ignores: [
+      "**/coverage/**",
+      "**/.build/**",
+      "**/node_modules/**",
+      "**/dist/**",
+    ],
+  },
+  {
+    files: ["**/*.{js,mjs,cjs,ts}"],
+    extends: [js.configs.recommended, ...tseslint.configs.recommended],
+    languageOptions: {
+      globals: globals.node,
+    },
+  },
+  {
+    files: ["**/*.ts"],
+    languageOptions: {
+      parserOptions: {
+        project: "./tsconfig.json",
+        tsconfigRootDir: import.meta.dirname,
+      },
+    },
+  },
+  {
+    files: ["**/*.{js,mjs,cjs,ts}"],
+    extends: [security.configs.recommended],
+  },
+  {
+    files: ["**/*.{js,mjs,cjs,ts}"],
+    plugins: { sonarjs },
+    rules: sonarjs.configs.recommended.rules,
+  },
+  {
+    files: ["**/*.{js,mjs,cjs,ts}"],
+    extends: [unicorn.configs.recommended],
+    rules: {
+      "unicorn/prevent-abbreviations": "off",
+      "unicorn/no-null": "off",
+      "unicorn/no-useless-undefined": "off",
+      "unicorn/prefer-module": "off",
+    },
+  },
+  {
+    files: ["**/__tests__/**", "**/*.test.*", "**/*.spec.*"],
+    extends: [jest.configs["flat/recommended"]],
+    rules: {
+      "@typescript-eslint/no-unsafe-assignment": "off",
+      "@typescript-eslint/no-unsafe-member-access": "off",
+      "@typescript-eslint/no-unsafe-return": "off",
+      "@typescript-eslint/no-unsafe-call": "off",
+      "@typescript-eslint/no-unsafe-argument": "off",
+      "@typescript-eslint/no-explicit-any": "off",
+    },
+  },
+);

tools/bundle-analysis/jest.config.ts

@@ -0,0 +1,29 @@
+import type { Config } from "jest";
+
+const jestConfig: Config = {
+  preset: "ts-jest",
+  clearMocks: true,
+  silent: true,
+  collectCoverage: true,
+  collectCoverageFrom: ["src/**/*.ts", "!src/__tests__/**", "!src/types.ts"],
+  coverageDirectory: "./.reports/unit/coverage",
+  coverageProvider: "v8",
+  coveragePathIgnorePatterns: ["/__tests__/", "/node_modules/"],
+  transform: { "^.+\\.ts$": "ts-jest" },
+  testPathIgnorePatterns: [".build"],
+  testMatch: ["**/?(*.)+(spec|test).[jt]s?(x)"],
+  testEnvironment: "node",
+  moduleNameMapper: {
+    "^src/(.*)$": "<rootDir>/src/$1",
+  },
+  coverageThreshold: {
+    global: {
+      branches: 100,
+      functions: 100,
+      lines: 100,
+      statements: 100,
+    },
+  },
+};
+
+export default jestConfig;