def execute_command()

in src/buildstream/sandbox/_sandboxreapi.py [0:0]

• 20 lines of code
• 14 McCabe index (conditional complexity)

    def execute_command(self, command):
        if self.first_command is None:
            # First command in batch
            # Initial working directory and environment of script already matches
            # the command configuration.
            self.first_command = command
        else:
            # Change working directory for this command
            if command.cwd != self.cwd:
                self.script += "mkdir -p {}\n".format(command.cwd)
                self.script += "cd {}\n".format(command.cwd)

            # Update environment for this command
            for key in self.env.keys():
                if key not in command.env:
                    self.script += "unset {}\n".format(key)
            for key, value in command.env.items():
                if key not in self.env or self.env[key] != value:
                    self.script += "export {}={}\n".format(key, shlex.quote(value))

        # Keep track of current working directory and environment
        self.cwd = command.cwd
        self.env = command.env

        # Actual command execution
        cmdline = " ".join(shlex.quote(cmd) for cmd in command.command)
        self.script += "(set -ex; {})".format(cmdline)

        # Error handling
        label = command.label or cmdline
        quoted_label = shlex.quote("'{}'".format(label))
        self.script += " || (echo Command {} failed with exitcode $? >&2 ; exit 1)\n".format(quoted_label)