blurb.py 文件源码

def find_editor():
    for var in 'GIT_EDITOR', 'EDITOR':
        editor = os.environ.get(var)
        if editor is not None:
            return editor
    if sys.platform == 'win32':
        fallbacks = ['notepad.exe']
    else:
        fallbacks = ['/etc/alternatives/editor', 'nano']
    for fallback in fallbacks:
        if os.path.isabs(fallback):
            found_path = fallback
        else:
            found_path = shutil.which(fallback)
        if found_path and os.path.exists(found_path):
            return found_path
    error('Could not find an editor! Set the EDITOR environment variable.')