feat: add version package to securely import the CDF version number into service code

source/common/config/rush/repo-state.json

@@ -1,5 +1,5 @@
 // DO NOT MODIFY THIS FILE MANUALLY BUT DO COMMIT IT. It is generated and used by Rush.
 {
-  "pnpmShrinkwrapHash": "d8b7c902b74f2c02b6c151ecccf06d926715e682",
+  "pnpmShrinkwrapHash": "f85cc14f59c4c9b6abdd1cf80944d1105fcb45bf",
   "preferredVersionsHash": "14c05a7722342014cec64c4bef7d9bed0d0b7b7f"
 }

source/packages/libraries/core/version/.eslintrc.js

@@ -0,0 +1,4 @@
+module.exports = {
+  root: true,
+  extends: ["@awssolutions/eslint-config-custom"],
+};

source/packages/libraries/core/version/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "@awssolutions/cdf-version",
+  "version": "0.0.0",
+  "description": "",
+  "main": "dist/index.js",
+  "module": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "scripts": {
+    "clean": "npx shx rm -rf dist *.tsbuildinfo .rush .nyc_output *.log",
+    "lint": "npx eslint . --ext '.ts'",
+    "build": "npx ts-node --swc scripts/compile.ts",
+    "test": "rushx lint && jest --silent --passWithNoTests --maxWorkers=$JEST_MAX_WORKERS"
+  },
+  "devDependencies": {
+    "@awssolutions/eslint-config-custom": "workspace:~0.0.0",
+    "@types/node": "^18.17.0",
+    "typescript": "4.2.4",
+    "ts-morph": "~22.0.0"
+  },
+  "license": "ISC",
+  "dependencies": {
+    "@types/node": "^18.17.0",
+    "@swc/core": "~1.5.3"
+  }
+}

source/packages/libraries/core/version/scripts/compile.ts

@@ -0,0 +1,73 @@
+import fs from 'fs';
+import readline from 'readline';
+import { Project } from 'ts-morph';
+
+/**
+ * This function extract the version number from the version policies file,
+ * source/common/config/rush/version-policies.json, managed by rush.
+ *
+ * This JSON file contains comments, therefore regular "import" statement
+ * won't work. So we are reading the file line by line to get the external
+ * version number.
+ *
+ * The errors thrown from here will ONLY happen in build time.
+ *
+ * @returns version number string in SemVer format
+ */
+async function extractVersion(): Promise<string> {
+    const versionPoliciesReadStream = fs.createReadStream(
+        '../../../../common/config/rush/version-policies.json'
+    );
+    const rl = readline.createInterface({
+        input: versionPoliciesReadStream,
+        crlfDelay: Infinity,
+    });
+
+    // NodeJS's readline interface doesn't support moving "only" one line.
+    // if the for-loop breaks, we won't be able to get the line we need.
+    // So we need to know what the "previous" line is to stop and get the
+    // "current" line that contains the version number
+    let previousLine: string = '';
+    let versionLine: string | undefined = undefined;
+    for await (const line of rl) {
+        if (previousLine.includes('"policyName": "external",')) {
+            versionLine = line;
+            break;
+        }
+
+        previousLine = line;
+    }
+
+    if (!versionLine?.includes('"version"')) {
+        throw new Error('cdf-version: fail to capture version line.');
+    }
+
+    // https://semver.org/#is-there-a-suggested-regular-expression-regex-to-check-a-semver-string
+    const versionRegex =
+        /(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(?:-((?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\+([0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?/;
+    const version = versionLine.match(versionRegex);
+
+    if (!version) {
+        throw new Error(
+            `cdf-version: fail to extract version number with regex, captured version line: ${versionLine}`
+        );
+    }
+
+    return version[0];
+}
+
+async function compile(): Promise<void> {
+    const emittingProject = new Project({
+        tsConfigFilePath: 'tsconfig.json',
+    });
+    const version = await extractVersion();
+
+    const versionFile = emittingProject.getSourceFileOrThrow('src/version.ts');
+    versionFile.replaceWithText((writer) => {
+        writer.writeLine(`export const version = ${JSON.stringify(version)}`);
+    });
+
+    await emittingProject.emit();
+}
+
+compile();

source/packages/libraries/core/version/src/index.ts

@@ -0,0 +1 @@
+export * from './version';

source/packages/libraries/core/version/src/version.ts

@@ -0,0 +1,2 @@
+// Do not modify this file. The contents of this file are replaced during compilation.
+export {};

source/packages/libraries/core/version/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "extends": "../../tsconfig.libraries.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "rootDir": "src",
+  },
+  "references": [],
+  "include": ["src"],
+  "exclude": ["node_modules", "dist"]
+}