mbed.py 文件源码

def check_requirements(self, show_warning=False):
        req_path = self.get_requirements() or self.path
        req_file = 'requirements.txt'
        missing = []
        try:
            with open(os.path.join(req_path, req_file), 'r') as f:
                import pip
                installed_packages = [re.sub(r'-', '_', package.project_name.lower()) for package in pip.get_installed_distributions(local_only=True)]
                for line in f.read().splitlines():
                    pkg = re.sub(r'-', '_', re.sub(r'^([\w-]+).*$', r'\1', line).lower())
                    if not pkg in installed_packages:
                        missing.append(pkg)

                if missing and install_requirements:
                    try:
                        action("Auto-installing missing Python modules...")
                        pquery(['pip', 'install', '-q', '-r', os.path.join(req_path, req_file)])
                        missing = []
                    except ProcessException:
                        warning("Unable to auto-install required Python modules.")

        except (IOError, ImportError, OSError):
            pass

        if missing:
            err = (
                "-----------------------------------------------------------------\n"
                "The mbed OS tools in this program require the following Python modules: %s\n"
                "You can install all missing modules by running \"pip install -r %s\" in \"%s\"" % (', '.join(missing), req_file, req_path))
            if os.name == 'posix':
                err += "\nOn Posix systems (Linux, Mac, etc) you might have to switch to superuser account or use \"sudo\""

            if show_warning:
                warning(err)
            else:
                error(err, 1)


    # Routines after cloning mbed-os