# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
def file_exists(node, file):
"""Quick and dirty check for existence of remote file."""
try:
node.account.ssh("cat " + file, allow_fail=False)
return True
except:
return False
def path_exists(node, path):
"""Quick and dirty check for existence of remote path."""
try:
node.account.ssh("ls " + path, allow_fail=False)
return True
except:
return False
def line_count(node, file):
"""Return the line count of file on node"""
out = [line for line in node.account.ssh_capture("wc -l %s" % file)]
if len(out) != 1:
raise Exception("Expected single line of output from wc -l")
return int(out[0].strip().split(" ")[0])
def java_version(node):
# Determine java version on the node
version = -1
for line in node.account.ssh_capture("java -version"):
if line.find("version") != -1:
version = parse_version_str(line)
return version
def parse_version_str(line):
# Parse java version string. Examples:
#`openjdk version "11.0.5" 2019-10-15` will return 11.
#`java version "1.5.0"` will return 5.
line = line[line.find('version \"') + 9:]
dot_pos = line.find(".")
if line[:dot_pos] == "1":
return int(line[dot_pos+1:line.find(".", dot_pos+1)])
else:
return int(line[:dot_pos])