[TypeSpec] Add @azure-tools/typespec-validation tool

- Replaces bash script used in "specs - typespec - validation" pipeline
- Also intended for spec authors to run on their dev machines

.gitignore

@@ -119,3 +119,7 @@ warnings.txt
 *.js.map
 *.d.ts.map
 *.bak
+
+# Eng Tools
+eng/tools/TypeSpecValidation/dist
+!eng/tools/TypeSpecValidation/cmd/*.js

eng/pipelines/templates/steps/typespec-ci.yml

@@ -5,49 +5,6 @@ parameters:
   type: string
 
 steps:
-- script: |
-    RED='\033[0;31m'
-    exit_code=0
-    expected_npm_prefix=$(pwd)
-
-    # Log commands before running
-    set -x
-
-    pushd ${{parameters.Folder}} || exit_code=1
-
-    actual_npm_prefix=$(npm prefix)
-
-    if [ "$expected_npm_prefix" != "$actual_npm_prefix" ]; then
-      echo -e "\n${RED}ERROR: TypeSpec folders MUST NOT contain a package.json, and instead MUST rely on the package.json at repo root."
-      echo -e "${RED}Expected npm prefix: $expected_npm_prefix\n${RED}Actual npm prefix: $actual_npm_prefix\n"
-      exit_code=1
-    fi
-
-    # Pass "--no" to ensure npx does not install anything (TypeSpec compiler should already be installed)
-
-    if test -f main.tsp; then
-      npx --no tsp compile . --warn-as-error || exit_code=1
-    fi
-    if test -f client.tsp; then
-      npx --no tsp compile client.tsp --no-emit --warn-as-error || exit_code=1
-    fi
-
-    # Format parent folder to include shared files
-    npx tsp format ../**/*.tsp
-
-    popd
-
-    # If any files are added, changed, or deleted, print diff and return error
-    if [ -n "$(git status --porcelain)" ]; then
-      git status
-      git diff
-      exit_code=1
-    fi
-
-    # Revert any changes
-    git restore .
-    git clean -df
-
-    exit $exit_code
+- script: npx --no tsv ${{parameters.Folder}}
   displayName: ${{parameters.DisplayName}}
   condition: succeededOrFailed()

eng/tools/TypeSpecValidation/cmd/tsv.js

@@ -0,0 +1,5 @@
+#!/usr/bin/env node
+
+import { main } from "../dist/TypeSpecValidation.js"
+
+await main();

eng/tools/TypeSpecValidation/package.json

@@ -0,0 +1,16 @@
+{
+    "name": "@azure-tools/typespec-validation",
+    "private": true,
+    "version": "0.0.1",
+    "type": "module",
+    "main": "dist/TypeSpecValidation.js",
+    "bin": {
+        "tsv": "cmd/tsv.js"
+    },
+    "dependencies": {
+        "simple-git": "^3.16.0"
+    },
+    "devDependencies": {
+        "@types/node": "^18.16.18"
+    }
+}

eng/tools/TypeSpecValidation/src/TypeSpecValidation.ts

@@ -0,0 +1,88 @@
+import {exec} from "child_process";
+import {access} from "fs/promises"
+import {parseArgs, ParseArgsConfig} from 'node:util';
+import path from "path";
+import {simpleGit} from 'simple-git';
+
+async function runCmd(cmd:string, cwd:string) {
+    console.log(`run command:${cmd}`)
+    const { err, stdout, stderr } = await new Promise((res) =>
+        exec(
+        cmd,
+        { encoding: "utf8", maxBuffer: 1024 * 1024 * 64, cwd: cwd},
+        (err: unknown, stdout: unknown, stderr: unknown) =>
+            res({ err: err, stdout: stdout, stderr: stderr })
+        )
+    ) as any;
+    let resultString = stderr + stdout;
+    console.log("Stdout output:")
+    console.log(stdout)
+    if (stderr) {
+        console.log("Stderr output:")
+        console.log(stderr)
+    }
+    if (stderr || err) {
+        throw new Error(err);
+    }
+    return resultString as string;
+}
+
+async function checkFileExists(file:string) {
+    return access(file)
+        .then(() => true)
+        .catch(() => false)
+}
+
+export async function main() {
+    const args = process.argv.slice(2);
+    const options = {
+        folder: {
+          type: 'string',
+          short: 'f',
+        },
+    };
+    const parsedArgs = parseArgs({ args, options, allowPositionals: true} as ParseArgsConfig);
+    const folder = parsedArgs.positionals[0];
+    console.log("Running TypeSpecValidation on folder:", folder);
+
+    // Verify all specs are using root level pacakge.json
+    let expected_npm_prefix = process.cwd()
+    const actual_npm_prefix = (await runCmd(`npm prefix`, folder)).trim()
+    if (expected_npm_prefix !== actual_npm_prefix) {
+        console.log("ERROR: TypeSpec folders MUST NOT contain a package.json, and instead MUST rely on the package.json at repo root.")
+        throw new Error ("Expected npm prefix: " + expected_npm_prefix +"\nActual npm prefix: " + actual_npm_prefix)
+    }
+
+    // Spec compilation check
+    if (await checkFileExists(path.join(folder, "main.tsp"))) {
+        await runCmd(
+            `npx --no tsp compile . --warn-as-error`,
+            folder
+        );
+    }
+    if (await checkFileExists(path.join(folder, "client.tsp"))) {
+        await runCmd(
+            `npx --no tsp compile client.tsp --no-emit --warn-as-error`,
+            folder
+        );
+    }
+
+    // Format parent folder to include shared files
+    await runCmd(
+        `npx tsp format ../**/*.tsp`,
+        folder
+    );
+
+    // Verify generated swagger file is in sync with one on disk
+    const git = simpleGit();
+    let gitStatusIsClean = await (await git.status(['--porcelain'])).isClean()
+    if (!gitStatusIsClean) {
+        let gitStatus = await git.status()
+        let gitDiff = await git.diff()
+        console.log("git status")
+        console.log(gitStatus)
+        console.log("git diff")
+        console.log(gitDiff)
+        throw new Error("Generated swagger file does not match swagger file on disk")
+    }
+}

eng/tools/TypeSpecValidation/tsconfig.json

@@ -0,0 +1,8 @@
+{
+  "extends": "../../../tsconfig.json",
+  "compilerOptions": {
+    "target": "ES6",
+    "module": "Node16",
+    "outDir": "./dist"
+  }
+}

package.json

@@ -20,7 +20,11 @@
     "@azure/avocado": "^0.8.4",
     "@types/prettier": "^2.7.2",
     "prettier": "^2.8.8",
-    "typescript": "~5.0.4"
+    "typescript": "~5.0.4",
+    "typespec-validation": "file:eng/tools/TypeSpecValidation"
+  },
+  "scripts": {
+    "postinstall": "npx --no tsc -- -p eng/tools/TypeSpecValidation"
   },
   "private": true
 }