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Major improvements in error handling, & small fix

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askiiart 2022-12-15 17:38:51 -06:00
parent 16632f933b
commit 1e05dd2cd6
1 changed files with 38 additions and 16 deletions
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54
docker_wrapper.py
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@ -2,9 +2,11 @@ from subprocess import getoutput, getstatusoutput
import pprint import pprint
import os import os
class NoContainersError(Exception): class NoContainersError(Exception):
pass pass
class Docker: class Docker:
@staticmethod @staticmethod
def running_containers_info(): def running_containers_info():
@ -14,12 +16,13 @@ class Docker:
""" """
raw_info = getoutput('docker ps') raw_info = getoutput('docker ps')
if '\n' not in raw_info: if '\n' not in raw_info:
raise(NoContainersError('A running Docker container is required to run this program. Please run a docker container and try again.')) raise (NoContainersError(
'A running Docker container is required to run this program. Please run a docker container and try again.'))
# Header: "CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES" (with way more spaces) # Header: "CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES" (with way more spaces)
header = raw_info[:raw_info.find('\n')+1] header = raw_info[:raw_info.find('\n')+1]
header_indices = {'CONTAINER ID': header.find('CONTAINER ID'), 'IMAGE': header.find('IMAGE'), header_indices = {'CONTAINER ID': header.find('CONTAINER ID'), 'IMAGE': header.find('IMAGE'),
'COMMAND': header.find('COMMAND'), 'CREATED': header.find('CREATED'), 'STATUS': header.find('STATUS'), 'COMMAND': header.find('COMMAND'), 'CREATED': header.find('CREATED'), 'STATUS': header.find('STATUS'),
'PORTS': header.find('PORTS'), 'NAMES': header.find('NAMES')} 'PORTS': header.find('PORTS'), 'NAMES': header.find('NAMES')}
# Remove header (example above) # Remove header (example above)
raw_info = raw_info[raw_info.find('\n')+1:] raw_info = raw_info[raw_info.find('\n')+1:]
@ -44,8 +47,7 @@ class Docker:
raw_info.split('\n')[i][start_i:end_i].strip() raw_info.split('\n')[i][start_i:end_i].strip()
return info return info
@staticmethod @staticmethod
def containers(): def containers():
""" """
@ -54,7 +56,8 @@ class Docker:
""" """
raw_info = getoutput('docker container list') raw_info = getoutput('docker container list')
if '\n' not in raw_info: if '\n' not in raw_info:
raise(NoContainersError('A Docker container is required to run this program. Please create a docker container and try again.')) raise (NoContainersError(
'A Docker container is required to run this program. Please create a docker container and try again.'))
# Remove header # Remove header
raw_info = raw_info[raw_info.find('\n')+1:] raw_info = raw_info[raw_info.find('\n')+1:]
info = {} info = {}
@ -63,9 +66,9 @@ class Docker:
containers = [] containers = []
for line in raw_info.split('\n'): for line in raw_info.split('\n'):
containers.append(line.strip()[line.strip().rfind(' ')+1:]) containers.append(line.strip()[line.strip().rfind(' ')+1:])
return containers return containers
@staticmethod @staticmethod
def all_containers_info(): def all_containers_info():
""" """
@ -74,12 +77,13 @@ class Docker:
""" """
raw_info = getoutput('docker ps -a') raw_info = getoutput('docker ps -a')
if '\n' not in raw_info: if '\n' not in raw_info:
raise(NoContainersError('A Docker container is required to run this program. Please create a docker container and try again.')) raise (NoContainersError(
'A Docker container is required to run this program. Please create a docker container and try again.'))
# Header: "CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES" (with way more spaces) # Header: "CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES" (with way more spaces)
header = raw_info[:raw_info.find('\n')+1] header = raw_info[:raw_info.find('\n')+1]
header_indices = {'CONTAINER ID': header.find('CONTAINER ID'), 'IMAGE': header.find('IMAGE'), header_indices = {'CONTAINER ID': header.find('CONTAINER ID'), 'IMAGE': header.find('IMAGE'),
'COMMAND': header.find('COMMAND'), 'CREATED': header.find('CREATED'), 'STATUS': header.find('STATUS'), 'COMMAND': header.find('COMMAND'), 'CREATED': header.find('CREATED'), 'STATUS': header.find('STATUS'),
'PORTS': header.find('PORTS'), 'NAMES': header.find('NAMES')} 'PORTS': header.find('PORTS'), 'NAMES': header.find('NAMES')}
# Remove header (example above) # Remove header (example above)
raw_info = raw_info[raw_info.find('\n')+1:] raw_info = raw_info[raw_info.find('\n')+1:]
@ -116,7 +120,7 @@ class Docker:
dict: The info about the container dict: The info about the container
""" """
return Docker.all_containers_info()[container] return Docker.all_containers_info()[container]
@staticmethod @staticmethod
def compose(dir): def compose(dir):
""" """
@ -129,10 +133,10 @@ class Docker:
""" """
cwd = os.getcwd() cwd = os.getcwd()
os.chdir(dir) os.chdir(dir)
status = getstatusoutput('docker compose up -detach --build --remove-orphans') status = getstatusoutput('docker compose up --detach --build --remove-orphans')
os.chdir(cwd) os.chdir(cwd)
return status return status
@staticmethod @staticmethod
def start(container): def start(container):
""" """
@ -144,7 +148,7 @@ class Docker:
int: The exit code of docker start int: The exit code of docker start
""" """
return getstatusoutput(f'docker start {container}')[0] return getstatusoutput(f'docker start {container}')[0]
@staticmethod @staticmethod
def stop(container): def stop(container):
""" """
@ -156,7 +160,7 @@ class Docker:
int: The exit code of docker stop int: The exit code of docker stop
""" """
return getstatusoutput(f'docker stop {container}')[0] return getstatusoutput(f'docker stop {container}')[0]
@staticmethod @staticmethod
def rm(container): def rm(container):
""" """
@ -169,6 +173,24 @@ class Docker:
""" """
return getstatusoutput(f'docker rm {container}')[0] return getstatusoutput(f'docker rm {container}')[0]
@staticmethod
def containers_exist():
"""
Checks if any containers exist
:returns:
bool: True if containers exist, False otherwise
"""
return True if '\n' in getoutput('docker ps -a') else False
def aliens_exist():
"""
Checks if aliens exist
:returns:
bool: Up all night long; And there's something very wrong
"""
return True if 'blink-182' in 'your playlist' else False
if __name__ == '__main__': if __name__ == '__main__':
try: try: