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Configuration values can be loaded from the system environment by adding a "TUTOR_" prefix. Environment values supersede values from the user configuration file, so that we can set values from the command line with "KEY=VAL tutor config save --silent" even when KEY is already present in the user configuration file.
64 lines
1.9 KiB
Python
64 lines
1.9 KiB
Python
import click
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import random
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import shutil
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import string
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import subprocess
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from . import exceptions
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from . import fmt
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def random_string(length):
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return "".join([random.choice(string.ascii_letters + string.digits) for _ in range(length)])
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def parse_yaml_value(v):
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"""
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Parse a yaml-formatted string
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"""
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if v.isdigit():
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v = int(v)
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elif v in ["true", "false"]:
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v = (v == "true")
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return v
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def docker_run(*command):
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return docker("run", "--rm", "-it", *command)
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def docker(*command):
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if shutil.which("docker") is None:
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raise exceptions.TutorError("docker is not installed. Please follow instructions from https://docs.docker.com/install/")
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return execute("docker", *command)
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def docker_compose(*command):
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if shutil.which("docker-compose") is None:
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raise exceptions.TutorError("docker-compose is not installed. Please follow instructions from https://docs.docker.com/compose/install/")
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return execute("docker-compose", *command)
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def kubectl(*command):
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if shutil.which("kubectl") is None:
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raise exceptions.TutorError(
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"kubectl is not installed. Please follow instructions from https://kubernetes.io/docs/tasks/tools/install-kubectl/"
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)
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return execute("kubectl", *command)
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def execute(*command):
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click.echo(fmt.command(" ".join(command)))
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with subprocess.Popen(command) as p:
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try:
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result = p.wait(timeout=None)
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except KeyboardInterrupt:
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p.kill()
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p.wait()
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raise
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except Exception as e:
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p.kill()
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p.wait()
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raise exceptions.TutorError("Command failed: {}".format(
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" ".join(command)
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))
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if result > 0:
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raise exceptions.TutorError("Command failed with status {}: {}".format(
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result,
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" ".join(command)
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))
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