src/goDebugConfiguration: clean up launch config snippets

Merged the package debug/test configuration snippets into
one 'auto' snippet. I also learned that goDebugConfiguration
translates 'auto' to 'debug'/'test' depending on the open
file in the editor, not based on the 'program' attribute,
which is good.

For 'program', recommend fileDirname, instead of file
for package mode.

Change-Id: Ia6d4fb502cc904f13ea096a61f8888ba7d92db57
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/308493
Trust: Hyang-Ah Hana Kim <[email protected]>
Run-TryBot: Hyang-Ah Hana Kim <[email protected]>
TryBot-Result: kokoro <[email protected]>
Reviewed-by: Suzy Mueller <[email protected]>

Author: hyangah

docs/debugging.md

@@ -174,7 +174,7 @@ Below are the available sample configurations:
 
 #### Debug the current file (`Go: Launch file`)
 
-Recall that `${file}` refers to the currently opened file (see [Using VS Code Variables](#using-vs-code-variables)).
+Recall that `${file}` refers to the currently opened file (see [Using VS Code Variables](#using-vs-code-variables)). For debugging a package that consists with multiple files, use `${fileDirname}` instead.
 
 ```json5
 {
@@ -206,7 +206,8 @@ Recall that `${workspaceFolder}` refers to the current workspace (see [Using VS
 
 #### Debug all tests in the given package (`Go: Launch test package`)
 
-Recall that `${workspaceFolder}` refers to the current workspace (see [Using VS Code Variables](#using-vs-code-variables)).
+A package is a collection of source files in the same directory that are compiled together.
+Recall that `${fileDirname}` refers to the directory of the open file (see [Using VS Code Variables](#using-vs-code-variables)).
 
 ```json5
 {

package.json

@@ -438,12 +438,12 @@
         "configurationSnippets": [
           {
             "label": "Go: Launch package",
-            "description": "Debug the package in the program attribute",
+            "description": "Debug/test the package in the program attribute",
             "body": {
               "name": "${2:Launch Package}",
               "type": "go",
               "request": "launch",
-              "mode": "debug",
+              "mode": "auto",
               "program": "^\"\\${workspaceFolder}${1:}\""
             }
           },
@@ -458,17 +458,6 @@
               "program": "^\"${1:\\${file\\}}\""
             }
           },
-          {
-            "label": "Go: Launch test package",
-            "description": "Debug the test package in the program attribute",
-            "body": {
-              "name": "${2:Launch test package}",
-              "type": "go",
-              "request": "launch",
-              "mode": "test",
-              "program": "^\"\\${workspaceFolder}${1:}\""
-            }
-          },
           {
             "label": "Go: Launch test function",
             "description": "Debug the test function in the args, ensure program attributes points to right package",

src/goDebugConfiguration.ts

@@ -34,18 +34,18 @@ export class GoDebugConfigurationProvider implements vscode.DebugConfigurationPr
 	public async pickConfiguration(): Promise<vscode.DebugConfiguration[]> {
 		const debugConfigurations = [
 			{
-				label: 'Go: Launch package',
-				description: 'Debug the package in the program attribute',
+				label: 'Go: Launch Package',
+				description: 'Debug/test the package of the open file',
 				config: {
 					name: 'Launch Package',
 					type: this.defaultDebugAdapterType,
 					request: 'launch',
-					mode: 'debug',
-					program: '${workspaceFolder}'
+					mode: 'auto',
+					program: '${fileDirname}'
 				}
 			},
 			{
-				label: 'Go: Launch file',
+				label: 'Go: Launch File',
 				description: 'Debug the file in the program attribute',
 				config: {
 					name: 'Launch file',
@@ -55,17 +55,6 @@ export class GoDebugConfigurationProvider implements vscode.DebugConfigurationPr
 					program: '${file}'
 				}
 			},
-			{
-				label: 'Go: Launch test package',
-				description: 'Debug the test package in the program attribute',
-				config: {
-					name: 'Launch test package',
-					type: 'go',
-					request: 'launch',
-					mode: 'test',
-					program: '${workspaceFolder}'
-				}
-			},
 			{
 				label: 'Go: Launch test function',
 				description: 'Debug the test function in the args, ensure program attributes points to right package',
@@ -74,7 +63,7 @@ export class GoDebugConfigurationProvider implements vscode.DebugConfigurationPr
 					type: 'go',
 					request: 'launch',
 					mode: 'test',
-					program: '${workspaceFolder}',
+					program: '${fileDirname}',
 					args: ['-test.run', 'MyTestFunction']
 				},
 				fill: async (config: vscode.DebugConfiguration) => {