[tsp-client] Print example command

tools/tsp-client/CHANGELOG.md

@@ -1,5 +1,9 @@
 # Release
 
+## 2024-11-08 - 0.14.1
+
+- Print an example `tsp compile` call when the `--debug` flag is passed to a `tsp-client` command.
+
 ## 2024-11-07 - 0.14.0
 
 - Fix `init` command when using a local spec:

tools/tsp-client/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@azure-tools/typespec-client-generator-cli",
-  "version": "0.14.0",
+  "version": "0.14.1",
   "description": "A tool to generate Azure SDKs from TypeSpec",
   "main": "dist/index.js",
   "homepage": "https://github.com/Azure/azure-sdk-tools/tree/main/tools/tsp-client#readme",

tools/tsp-client/src/commands.ts

@@ -276,14 +276,21 @@ export async function generateCommand(argv: any) {
     args.push("--force");
   }
   await npmCommand(srcDir, args);
-  const success = await compileTsp({
+
+  const [success, exampleCmd] = await compileTsp({
     emitterPackage: emitter,
     outputPath: outputDir,
     resolvedMainFilePath,
     saveInputs: saveInputs,
     additionalEmitterOptions: emitterOptions,
   });
 
+  if (argv["debug"]) {
+    Logger.warn(`Example of how to compile using the tsp commandline. NOTE: tsp-client does NOT directly run this command, results may vary:
+        ${exampleCmd}
+        `);
+  }
+
   if (saveInputs) {
     Logger.debug(`Skipping cleanup of temp directory: ${tempRoot}`);
   } else {

tools/tsp-client/src/typespec.ts

@@ -68,7 +68,7 @@ export async function compileTsp({
   resolvedMainFilePath: string;
   additionalEmitterOptions?: string;
   saveInputs?: boolean;
-}): Promise<boolean> {
+}): Promise<[boolean, string]> {
   const parsedEntrypoint = getDirectoryPath(resolvedMainFilePath);
   const { compile, NodeHost, resolveCompilerOptions, formatDiagnostic } =
     await importTsp(parsedEntrypoint);
@@ -103,6 +103,18 @@ export async function compileTsp({
     overrides,
   });
   Logger.debug(`Compiler options: ${JSON.stringify(options)}`);
+
+  const cliOptions = Object.entries(options.options?.[emitterPackage] ?? {})
+    .map(([key, value]) => {
+      if (typeof value === "object") {
+        value = JSON.stringify(value);
+      }
+      return `--option ${key}=${value}`;
+    })
+    .join(" ");
+
+  const exampleCmd = `npx tsp compile ${resolvedMainFilePath} --emit ${emitterPackage} ${cliOptions}`;
+
   if (diagnostics.length > 0) {
     let errorDiagnostic = false;
     // This should not happen, but if it does, we should log it.
@@ -118,7 +130,7 @@ export async function compileTsp({
       }
     }
     if (errorDiagnostic) {
-      return false;
+      return [false, exampleCmd];
     }
   }
 
@@ -138,11 +150,11 @@ export async function compileTsp({
       }
     }
     if (errorDiagnostic) {
-      return false;
+      return [false, exampleCmd];
     }
   }
   Logger.success("generation complete");
-  return true;
+  return [true, exampleCmd];
 }
 
 export async function importTsp(baseDir: string): Promise<typeof import("@typespec/compiler")> {

tools/tsp-client/test/typespec.spec.ts

@@ -9,7 +9,7 @@ describe("Check diagnostic reporting", function () {
       resolvePath(process.cwd(), "test", "examples", "specification", "diagnostics"),
     );
     try {
-      const succeeded = await compileTsp({
+      const [succeeded, _] = await compileTsp({
         emitterPackage: "@azure-tools/typespec-ts",
         outputPath: joinPaths(process.cwd(), "examples"),
         resolvedMainFilePath: mainFile,