fix(vscode): list only exported variables and stop PowerShell truncating

fish's bare `set` also lists shell-local variables, so it is now `set -x`,
which matches what the other families print.

PowerShell's default table view truncates values at the console width, so
each variable is now formatted explicitly as `NAME=value`.

Adds the pwsh-off-Windows case for printEnvironmentCommand, and the SPDX
headers both new files were missing.

Signed-off-by: Adegbite Ayoade <tripleaceme@gmail.com>

Author: tripleaceme

vscode/extension/src/utilities/shellCommand.test.ts

@@ -1,6 +1,11 @@
+// SPDX-License-Identifier: Apache-2.0
+
 import { describe, it, expect } from 'vitest'
 import { detectShellFamily, printEnvironmentCommand } from './shellCommand'
 
+const POWERSHELL_COMMAND =
+  "Get-ChildItem Env: | Sort-Object Name | ForEach-Object { '{0}={1}' -f $_.Name, $_.Value }"
+
 describe('detectShellFamily', () => {
   it('should detect fish', () => {
     expect(detectShellFamily('/usr/bin/fish', false)).toBe('fish')
@@ -62,8 +67,8 @@ describe('detectShellFamily', () => {
 })
 
 describe('printEnvironmentCommand', () => {
-  it('should use set in fish', () => {
-    expect(printEnvironmentCommand('/usr/bin/fish', false)).toBe('set')
+  it('should use the exported-only set in fish', () => {
+    expect(printEnvironmentCommand('/usr/bin/fish', false)).toBe('set -x')
   })
 
   it('should use env | sort in POSIX shells', () => {
@@ -84,7 +89,14 @@ describe('printEnvironmentCommand', () => {
         'C:\\Program Files\\PowerShell\\7\\pwsh.exe',
         true,
       ),
-    ).toBe('Get-ChildItem Env: | Sort-Object Name')
+    ).toBe(POWERSHELL_COMMAND)
+  })
+
+  it('should use the PowerShell command for pwsh off Windows', () => {
+    expect(printEnvironmentCommand('/usr/local/bin/pwsh', false)).toBe(
+      POWERSHELL_COMMAND,
+    )
+    expect(printEnvironmentCommand('pwsh', false)).toBe(POWERSHELL_COMMAND)
   })
 
   it('should keep the previous behaviour when the shell is unknown', () => {

vscode/extension/src/utilities/shellCommand.ts

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 /**
  * The shell families we know how to print environment variables in.
  */
@@ -6,10 +8,16 @@ export type ShellFamily = 'fish' | 'powershell' | 'cmd' | 'posix'
 /**
  * Commands that list the environment variables of the current shell, one per
  * shell family.
+ *
+ * `set -x` is fish's exported-only listing, which matches what the other
+ * families print; a bare `set` would also include shell-local variables.
+ * PowerShell formats each variable itself because the default table view
+ * truncates values at the console width.
  */
 const PRINT_ENVIRONMENT_COMMANDS: Record<ShellFamily, string> = {
-  fish: 'set',
-  powershell: 'Get-ChildItem Env: | Sort-Object Name',
+  fish: 'set -x',
+  powershell:
+    "Get-ChildItem Env: | Sort-Object Name | ForEach-Object { '{0}={1}' -f $_.Name, $_.Value }",
   cmd: 'set',
   posix: 'env | sort',
 }