anchor.diff:  if /I "%~1"=="test-sdist" call :test-sdist & exit /b
   if /I "%~1"=="test-bdist-wheel" call :test-bdist-wheel & exit /b
   if /I "%~1"=="get-reqs" call :get-reqs & exit /b
  -if /I "%~1"=="update-reqs" call :write-reqs & exit /b
  +if /I "%~1"=="update-reqs" call :update-reqs & exit /b
   if /I "%~1"=="check-dev-env" call :check-dev-env & exit /b
   if /I "%~1"=="check-all" call :check-all & exit /b
   @echo Unknown target called. & exit /b 1
  
positive.code: :uninstall-tt
  @echo.
  @echo %TAG% Uninstalling tt...
  where tt >nul 2>&1 || @echo Cancelled uninstall; tt is already not installed. & exit /b 0
  pip uninstall --yes %TT_PYPI_NAME% >nul 2>&1
  where tt >nul 1 2>&1 && @echo Failed uninstall. & exit /b 1
  @echo %TAG% OK.
  @echo.
  exit /b
  
negative.code: @echo.
  @echo %TAG% Installing tt...
  pip install --upgrade --editable . >nul 2>&1
  where tt >nul 2>&1 || @echo %TAG% Installation of tt failed & exit /b 1
  @echo %TAG% OK.
  @echo.
  exit /b
  