Strawberry Perl Windows下CPAN安装失败：'.'未被识别问题求助

Hey there, let's work through this frustrating installation issue you're facing. That '.' is not recognized as an internal or external command error usually pops up when a module's build script uses Unix-style shell syntax (like using . to source a script) which Windows' default CMD doesn't understand. Here are actionable steps to fix this:

• Switch to cpanminus for installation
  The default cpan tool can sometimes struggle with Windows-specific build quirks, but cpanm (App::cpanminus) is more robust for cross-platform installs. First install it via:

  cpan App::cpanminus
  

  Then try installing your target module with:

  cpanm Text::Trim
  

• Use Strawberry Perl's built-in shell
  Strawberry Perl comes with a dedicated shell (either Git Bash or MinGW Shell) that supports Unix-style commands. Look for the "Strawberry Perl Shell" shortcut in your Start Menu, open it, and run your cpan or cpanm commands from there. This shell will correctly interpret the . command that's failing in regular CMD.

• Manually tweak the module's build script (if needed)
  If the above methods don't work, you can modify the module's build files to fix the syntax:

  1. Download the module source from CPAN (search for the module name, grab the .tar.gz file)
  2. Extract it and open either Build.PL or Makefile.PL in a text editor
  3. Look for lines that use ./ (like ./configure) or . some_script.sh — replace ./ with perl (if it's a Perl script) or adjust the path to use Windows-style syntax
  4. Run the build steps manually:

     perl Build.PL
     Build
     Build test
     Build install
     

• Upgrade your Strawberry Perl version
  Perl 5.26.2.1 is quite old (released in 2018), and newer versions of Strawberry Perl include better Windows compatibility fixes and updated toolchains. Upgrading to the latest 64-bit release might resolve the underlying build environment issues entirely.

• Verify dependencies first
  Sometimes the error is a side effect of a missing or broken dependency. For Text::Trim, the main dependency is Test::More — ensure it's up to date by running:

  cpan Test::More
  

  Then try installing Text::Trim again.

Give these steps a shot in order, and you should be able to get those modules installed without the . command error.

内容的提问来源于stack exchange，提问作者Stephen