Merge pull request #52 from gregg-miskelly/MissingContentFileDetection

Add error detection for when content files don't get copied.

src/coreclr-debug.ts

@@ -42,6 +42,8 @@ export function installCoreClrDebug(context: vscode.ExtensionContext) {
     spawnChildProcess('dotnet', ['--verbose', 'restore'], _channel, _coreClrDebugDir)
     .then(function() {
         return spawnChildProcess('dotnet', ['--verbose', 'publish', '-o', _debugAdapterDir], _channel, _coreClrDebugDir);
+    }).then(function() {
+        return ensureAd7EngineExists(_channel, _debugAdapterDir);
     }).then(function() {
         var promises: Promise<void>[] = [];
 
@@ -147,6 +149,28 @@ function getPlatformLibExtension() : string {
     }
 }
 
+function ensureAd7EngineExists(channel: vscode.OutputChannel, outputDirectory: string) : Promise<void> {
+    let filePath = path.join(outputDirectory, "coreclr.ad7Engine.json");
+    return new Promise<void>((resolve, reject) => {
+        fs.exists(filePath, (exists) => {
+            if (exists) {
+                return resolve();
+            } else {
+                channel.appendLine(`${filePath} does not exist.`);
+                channel.appendLine('');
+                // NOTE: The minimum build number is actually less than 1584, but this is the minimum
+                // build that I have tested.
+                channel.appendLine("Error: The .NET CLI did not correctly restore debugger files. Ensure that you have .NET CLI version 1.0.0 build #001584 or newer. You can check your .NET CLI version using 'dotnet --version'.");
+                // TODO: remove the Linux-specific instructions once http://dotnet.github.io/getting-started/ is pointing at a newer build.
+                if (process.platform === "linux") {
+                    channel.appendLine("To update your build of the .NET Tools, run: sudo apt-get install dotnet=1.0.0.001584-1");
+                }
+                return reject("The .NET CLI did not correctly restore debugger files.");
+            }
+        });
+    });
+}
+
 function spawnChildProcess(process: string, args: string[], channel: vscode.OutputChannel, workingDirectory: string) : Promise<void> {
     var promise = new Promise<void>( function (resolve, reject) {
         const child = child_process.spawn(process, args, {cwd: workingDirectory});