Use temporary directory for debug sockets on NIX systems (#4637)

Fixes: #4523

This PR stores debug sockets in `/tmp/` or `$TMPDIR` (if set) on Linux & OSX platforms.

Author: valters-tomsons

src/common.ts

@@ -23,6 +23,16 @@ export function getExtensionPath() {
     return extensionPath;
 }
 
+export function getUnixTempDirectory(){
+    let envTmp = process.env.TMPDIR;
+    if(!envTmp)
+    {
+        return "/tmp/";
+    }
+
+    return envTmp;
+}
+
 export function isBoolean(obj: any): obj is boolean {
     return obj === true || obj === false;
 }

src/features/dotnetTest.ts

@@ -545,12 +545,13 @@ class DebugEventListener {
         this._fileName = fileName;
         this._server = server;
         this._eventStream = eventStream;
-        // NOTE: The max pipe name on OSX is fairly small, so this name shouldn't bee too long.
-        const pipeSuffix = "TestDebugEvents-" + process.pid;
+
         if (os.platform() === 'win32') {
-            this._pipePath = "\\\\.\\pipe\\Microsoft.VSCode.CSharpExt." + pipeSuffix;
-        } else {
-            this._pipePath = path.join(utils.getExtensionPath(), "." + pipeSuffix);
+            this._pipePath = "\\\\.\\pipe\\Microsoft.VSCode.CSharpExt.TestDebugEvents" + process.pid;
+        }
+        else {
+            let tmpdir = utils.getUnixTempDirectory();
+            this._pipePath = path.join(tmpdir, "ms-dotnettools.csharp-tde-" + process.pid);
         }
     }