为什么在设置PSReadLine颜色后，PowerShell 7恢复为白底黑

Question

我没有在任何使用PowerShell的机器上设置默认颜色，而是用代码创建了一个配置文件来进行颜色设置，这样我就可以从一个机器复制到另一个机器。设置控制台颜色可以很好地工作，但是，设置PSReadline颜色会将控制台的白色改为黑色。代码如下：

$consoleColorRaw = [int]0
$consoleColorError = [int]1
$consoleColorWarning = [int]2
$consoleColorDebug = [int]3
$consoleColorVerbose = [int]4
$consoleColorProgress = [int]5

function checkIfEnumColor($localColor)
{
  switch($localColor.ToLower())
  {
    "black" {Break}
    "darkBlue" {Break}
    "darkGreen" {Break}
    "darkCyan" {Break}
    "darkRed" {Break}
    "darkMagenta" {Break}
    "darkYellow" {Break}
    "gray" {Break}
    "darkGray" {Break}
    "blue" {Break}
    "green" {Break}
    "cyan" {Break}
    "red" {Break}
    "magenta" {Break}
    "yellow" {Break}
    "white" {Break}
    default { return $false }
  }

  return $true
}


function Color-Console($localWhich, $fg, $bg)
{
  $doClearHost = $false

  $localValue = checkIfEnumColor $bg
 
  if ($localValue -eq $false)
  {
    Write-Host ("Attempting to set background to non-enum value({0})." -f $bg)
    $doClearHost = $false;
  }
  else
  {
    $localValue = checkIfEnumColor $fg

    if ($localValue -eq $false)
    {
      Write-Output ("Attempting to set foreground to non-enum value({0})." -f $fg)
      $doClearHost = $false;
    }
    else
    {
      switch($localWhich)
      {
        $consoleColorRaw { $Host.ui.rawui.foregroundcolor = $fg; $Host.ui.rawui.backgroundcolor = $bg; Break }
        $consoleColorError { $Host.PrivateData.ErrorForegroundColor = $fg; $Host.PrivateData.ErrorBackgroundColor = $bg; Break }
        $consoleColorWarning { $Host.PrivateData.WarningForegroundColor = $fg; $Host.PrivateData.WarningBackgroundColor = $bg; Break }
        $consoleColorDebug { $Host.PrivateData.DebugForegroundColor = $fg; $Host.PrivateData.DebugBackgroundColor = $bg; Break }
        $consoleColorVerbose { $Host.PrivateData.VerboseForegroundColor = $fg; $Host.PrivateData.VerboseBackgroundColor = $bg; Break }
        $consoleColorProgress { $Host.PrivateData.ProgressForegroundColor = $fg; $Host.PrivateData.ProgressBackgroundColor = $bg; Break }

        default { $doClearHost = $false; Break }
      }
    }
  }

  if ($doClearHost -eq $true)
  {
    Clear-Host
  }
}

# I used the documentation in https://en.wikipedia.org/wiki/ANSI_escape_code#3-bit_and_4-bit
# to figure out the numbers for the ansi codes... The dark colors use the 30's and 40's
# and the regular colors use the 90's and 100's (bright colors)
function setPSReadlineColor($localWhich, $foreG, $backG)
{
  $fg = 0;
  $bg = 0;

  switch($foreG.ToLower())
  {
    "black" {$fg = 30;Break}
    "darkRed" {$fg = 31;Break}
    "darkGreen" {$fg = 32;Break}
    "darkYellow" {$fg = 33;Break}
    "darkBlue" {$fg = 34;Break}
    "darkMagenta" {$fg = 35;Break}
    "darkCyan" {$fg = 36;Break}
    "darkGray" {$fg = 37;Break}
    "gray" {$fg = 90;Break}
    "red" {$fg = 91;Break}
    "green" {$fg = 92;Break}
    "yellow" {$fg = 93;Break}
    "blue" {$fg = 94;Break}
    "magenta" {$fg = 95;Break}
    "cyan" {$fg = 96;Break}
    "white" {$fg = 97;Break}
    default {Write-Host ("Attempting to set '{0}' foreground color to non-enum value({1})." -f $localWhich, $foreG); return }
  }

  switch($backG.ToLower())
  {
    "black" {$bg = 40;Break}
    "darkRed" {$bg = 41;Break}
    "darkGreen" {$bg = 42;Break}
    "darkYellow" {$bg = 43;Break}
    "darkBlue" {$bg = 44;Break}
    "darkMagenta" {$bg = 45;Break}
    "darkCyan" {$bg = 46;Break}
    "darkGray" {$bg = 47;Break}
    "gray" {$bg = 100;Break}
    "red" {$bg = 101;Break}
    "green" {$bg = 102;Break}
    "yellow" {$bg = 103;Break}
    "blue" {$bg = 104;Break}
    "magenta" {$bg = 105;Break}
    "cyan" {$bg = 106;Break}
    "white" {$bg = 107;Break}
    default {Write-Host ("Attempting to set '{0}' background color to non-enum value({1})." -f $localWhich, $backG);return }
  }

  $newColor = "$([char]0x1b)[{0};{1}m" -f $fg, $bg
  Set-PSReadLineOption -Colors @{$localWhich = $newColor}
}

Color-Console $consoleColorRaw "DarkMagenta" "Gray"
#Color-Console $consoleColorError "Red" "Gray"
Color-Console $consoleColorError "Yellow" "DarkCyan"
Color-Console $consoleColorWarning "Magenta" "Gray"
Color-Console $consoleColorDebug "Yellow" "Gray"
Color-Console $consoleColorVerbose "Green" "Gray"
Color-Console $consoleColorProgress "Cyan" "Gray"

setPSReadlineColor "Command" "Magenta" "White"
setPSReadlineColor "Variable" "Green" "Gray"

希望有人能发现我做错了什么:)谢谢！

Answer 1

我发现powershell 7(至少与5.1相比)将其配置文件保存到不同的位置，因此请仔细检查：

# PS5
$profile
C:\users\username\Documents\WindowsPowerShell\Microsoft.PowerShell_profile.ps1

# PS7
$profile
C:\users\username\Documents\PowerShell\Microsoft.PowerShell_profile.ps1

我发现如果你设置了一个无效的ansi转义序列，Set-PSReadLineOption会将你的文本颜色设置为默认值。但是不同的版本有不同的行为：

# PS5: No error, but sets color to terminal default (white in my case)
Set-PSReadLineOption -Colors @{Command='Magenta,Yellow'}

# PS7: Errors out
Set-PSReadLineOption -Colors @{Command='Magenta,Yellow'}
[Error] Set-PSReadLineOption: 'Magenta,Yellow' is not a valid color value.  It must be a ConsoleColor, ANSI escape sequence, or RGB value with optional leading '#'.

我把这两个建议放在第一位，因为你问题中的脚本按原样粘贴到我的个人资料中，我在powershell 5.1和7.1中都能工作。

您使用的是哪个航站楼？内置终端/cmd、PS Core、ISE、VS Code还是新的Windows终端？它们在这方面的表现基本相同，但可能有助于解释您所看到的内容。