fix(installer): make Windows standalone shim available in cmd

scripts/installation/install-qwen-standalone.ps1

@@ -91,6 +91,146 @@ function Get-ParentProcessName {
     }
 }
 
+function Get-NormalizedPath {
+    param([string]$PathValue)
+
+    if ([string]::IsNullOrEmpty($PathValue)) {
+        return $null
+    }
+
+    $trimmed = $PathValue.Trim().Trim('"')
+    if ([string]::IsNullOrEmpty($trimmed)) {
+        return $null
+    }
+
+    try {
+        return [IO.Path]::GetFullPath($trimmed).TrimEnd('\')
+    } catch {
+        return $trimmed.TrimEnd('\')
+    }
+}
+
+function Test-PathContainsDirectory {
+    param([string]$PathValue, [string]$Directory)
+
+    $target = Get-NormalizedPath -PathValue $Directory
+    if ([string]::IsNullOrEmpty($target)) {
+        return $false
+    }
+
+    foreach ($entry in @($PathValue -split ';')) {
+        $normalizedEntry = Get-NormalizedPath -PathValue $entry
+        if ([string]::Equals($normalizedEntry, $target, [StringComparison]::OrdinalIgnoreCase)) {
+            return $true
+        }
+    }
+
+    return $false
+}
+
+function Test-WritableDirectory {
+    param([string]$Directory)
+
+    if ([string]::IsNullOrEmpty($Directory)) {
+        return $false
+    }
+
+    if (-not (Test-Path -LiteralPath $Directory -PathType Container)) {
+        return $false
+    }
+
+    $probe = Join-Path $Directory ('.qwen-write-test-' + [IO.Path]::GetRandomFileName())
+    try {
+        [IO.File]::WriteAllText($probe, '')
+        Remove-Item -LiteralPath $probe -Force -ErrorAction SilentlyContinue
+        return $true
+    } catch {
+        Remove-Item -LiteralPath $probe -Force -ErrorAction SilentlyContinue
+        return $false
+    }
+}
+
+function Add-PathCandidate {
+    param(
+        [System.Collections.Generic.List[string]]$Candidates,
+        [string]$Directory
+    )
+
+    $normalizedDirectory = Get-NormalizedPath -PathValue $Directory
+    if ([string]::IsNullOrEmpty($normalizedDirectory)) {
+        return
+    }
+
+    foreach ($candidate in $Candidates) {
+        $normalizedCandidate = Get-NormalizedPath -PathValue $candidate
+        if ([string]::Equals($normalizedCandidate, $normalizedDirectory, [StringComparison]::OrdinalIgnoreCase)) {
+            return
+        }
+    }
+
+    [void]$Candidates.Add($Directory.Trim().Trim('"'))
+}
+
+function Install-CurrentCmdPathShim {
+    param([string]$QwenCommand, [string]$PathValue)
+
+    $pathEntries = @($PathValue -split ';' | Where-Object { -not [string]::IsNullOrEmpty($_) })
+    $candidates = [System.Collections.Generic.List[string]]::new()
+    $preferredDirectories = @()
+
+    if (-not [string]::IsNullOrEmpty($env:LOCALAPPDATA)) {
+        $preferredDirectories += Join-Path $env:LOCALAPPDATA 'Microsoft\WindowsApps'
+    }
+    if (-not [string]::IsNullOrEmpty($env:APPDATA)) {
+        $preferredDirectories += Join-Path $env:APPDATA 'npm'
+    }
+    if (-not [string]::IsNullOrEmpty($env:USERPROFILE)) {
+        $preferredDirectories += Join-Path $env:USERPROFILE '.bun\bin'
+    }
+
+    foreach ($preferredDirectory in $preferredDirectories) {
+        $preferredNormalized = Get-NormalizedPath -PathValue $preferredDirectory
+        foreach ($entry in $pathEntries) {
+            $entryNormalized = Get-NormalizedPath -PathValue $entry
+            if ([string]::Equals($entryNormalized, $preferredNormalized, [StringComparison]::OrdinalIgnoreCase)) {
+                Add-PathCandidate -Candidates $candidates -Directory $entry
+            }
+        }
+    }
+
+    $userRoot = Get-NormalizedPath -PathValue $env:USERPROFILE
+    foreach ($entry in $pathEntries) {
+        $entryNormalized = Get-NormalizedPath -PathValue $entry
+        if (
+            -not [string]::IsNullOrEmpty($userRoot) -and
+            -not [string]::IsNullOrEmpty($entryNormalized) -and
+            $entryNormalized.StartsWith($userRoot, [StringComparison]::OrdinalIgnoreCase)
+        ) {
+            Add-PathCandidate -Candidates $candidates -Directory $entry
+        }
+    }
+
+    foreach ($candidate in $candidates) {
+        if (-not (Test-WritableDirectory -Directory $candidate)) {
+            continue
+        }
+
+        $shimPath = Join-Path $candidate 'qwen.cmd'
+        if (Test-Path -LiteralPath $shimPath -PathType Leaf) {
+            $existingShim = Get-Content -LiteralPath $shimPath -Raw -ErrorAction SilentlyContinue
+            if ($existingShim -notmatch 'Qwen Code current-session shim') {
+                continue
+            }
+        }
+
+        $shim = "@echo off`r`nREM Qwen Code current-session shim. Generated by install-qwen-standalone.ps1.`r`ncall `"$QwenCommand`" %*`r`n"
+        [IO.File]::WriteAllText($shimPath, $shim, [Text.UTF8Encoding]::new($false))
+        return $shimPath
+    }
+
+    return $null
+}
+
 function Update-CurrentShell {
     $qwenInstallBinDir = Get-QwenInstallBinDir
     $qwenCommandPath = Join-Path $qwenInstallBinDir 'qwen.cmd'
@@ -98,15 +238,32 @@ function Update-CurrentShell {
         return
     }
 
+    $inheritedPath = $env:Path
     Update-CurrentSessionPath -BinDir $qwenInstallBinDir
 
     Write-Output "Run: qwen"
     $parentProcessName = Get-ParentProcessName
     if ($parentProcessName -ieq 'cmd.exe') {
+        if (Test-PathContainsDirectory -PathValue $inheritedPath -Directory $qwenInstallBinDir) {
+            Write-Output "qwen is ready to use after this installer command returns."
+            return
+        }
+
+        $shimPath = Install-CurrentCmdPathShim -QwenCommand $qwenCommandPath -PathValue $inheritedPath
+        if (-not [string]::IsNullOrEmpty($shimPath)) {
+            Write-Output "INFO: Added qwen.cmd to a directory already on this cmd.exe PATH:"
+            Write-Output "INFO:   ${shimPath}"
+            Write-Output "qwen is ready to use after this installer command returns."
+            return
+        }
+
+        Write-Output "WARNING: Windows does not allow this PowerShell child process to update the parent cmd.exe PATH directly."
         Write-Output "Or, for this cmd.exe window, run:"
         Write-Output "  set `"PATH=${qwenInstallBinDir};%PATH%`""
         return
     }
+
+    Write-Output "qwen is ready to use in this PowerShell session."
 }
 
 $qwenDefaultInstallerUrl = 'https://qwen-code-assets.oss-cn-hangzhou.aliyuncs.com/installation/install-qwen-standalone.bat'

scripts/tests/install-script.test.js

@@ -603,6 +603,35 @@ describe('standalone release packaging', () => {
     expect(installPowerShellSource).toContain('@args');
   });
 
+  it('PowerShell hosted entrypoint refreshes the current Windows shell', () => {
+    const installPowerShellSource = readScript(
+      'scripts/installation/install-qwen-standalone.ps1',
+    );
+    const installBatchSource = readScript(
+      'scripts/installation/install-qwen-standalone.bat',
+    );
+
+    expect(installPowerShellSource).toContain('Update-CurrentSessionPath');
+    expect(installPowerShellSource).toContain('Install-CurrentCmdPathShim');
+    expect(installPowerShellSource).toContain('Test-WritableDirectory');
+    expect(installPowerShellSource).toContain('Qwen Code current-session shim');
+    expect(installPowerShellSource).not.toContain('doskey.exe');
+    expect(installPowerShellSource).toContain(
+      'qwen is ready to use in this PowerShell session.',
+    );
+    expect(installPowerShellSource).toContain(
+      'Added qwen.cmd to a directory already on this cmd.exe PATH:',
+    );
+    expect(installPowerShellSource).toContain(
+      'Windows does not allow this PowerShell child process to update the parent cmd.exe PATH directly.',
+    );
+
+    expect(installBatchSource).toContain('QWEN_INSTALLER_PARENT_POWERSHELL');
+    expect(installBatchSource).toContain(
+      'Final PATH refresh is handled by the PowerShell entrypoint.',
+    );
+  });
+
   it('stages hosted installation assets with checksums', async () => {
     const {
       HOSTED_INSTALLATION_ASSET_NAMES,