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# coding: utf-8
from __future__ import print_function
from __future__ import division
from __future__ import absolute_import
import os
import re
import glob
import errno
from clselect.baseclselect import BaseSelectorError
# Used both for config and some state like available_versions cache
# mainly because it's easier to put it in cagefs as a one dir
# We have symlink to that dir in /etc
# for ease of use the selector config and avoiding problem with cagefs
CONFIG_DIR = '/usr/share/l.v.e-manager/cl.nodejs'
ALT_NAMES = 'alt-nodejs'
# It's also used to construct base_dir:
ALT_NODE_PREFIX = '/opt/alt/{}'.format(ALT_NAMES)
# This file is specifically created during package build and contains
# full version in the tail of a name
NODE_VERSION_GLOB = '/root/usr/share/node/node-version-'
class NodeJSError(BaseSelectorError):
"""Top level error class for admin's part of NodeJS selector"""
pass
class NodeJSConfigError(NodeJSError):
"""Generic error class for NodeConfig"""
pass
def is_major_version(ver):
"""Return True if specified MAJOR version is valid for processing"""
if not isinstance(ver, str):
return False
if not re.match(r'^[1-9][0-9]*$', ver):
return False
return True
def create_config_dirs():
try:
os.makedirs(CONFIG_DIR)
except OSError as e:
if e.errno != errno.EEXIST: # ignore only "File exists" error
raise
def scan_node_versions():
""" Search CL NodeJS interpreters and return dict with info about them """
res = {}
for folder in glob.glob('{}*{}*'.format(ALT_NODE_PREFIX,
NODE_VERSION_GLOB)):
full_ver = folder.split(NODE_VERSION_GLOB)[1]
if not full_ver:
# Only when package is broken
continue
maj_ver = str(int(full_ver.split('.')[0]))
res[maj_ver] = {
'full_version': full_ver,
'root_path': '{}{}/root'.format(ALT_NODE_PREFIX, maj_ver),
}
return res