-
Notifications
You must be signed in to change notification settings - Fork 1
/
java.py
52 lines (44 loc) · 1.72 KB
/
java.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
from __future__ import absolute_import
import re
import subprocess
from os import path, environ, access, X_OK
from puppeter.domain.facter import Facter
from puppeter.domain.model.javafacts import JavaVersion
from puppeter.domain.model.osfacts import OsFamily
def calculate_java_version():
# type: () -> JavaVersion
osfamily = Facter.get(OsFamily)
java_prog_name = 'java.exe' if osfamily is OsFamily.Windows else 'java'
search_paths = environ['PATH'].split(path.pathsep)
java_prog = None
for search_path in search_paths:
java_prog_candidate = path.join(search_path, java_prog_name)
if __is_executable(java_prog_candidate):
java_prog = java_prog_candidate
break
if java_prog is None:
return JavaVersion.NOT_INSTALLED
return __get_java_version(java_prog)
def __is_executable(candidate):
return path.exists(candidate) and access(candidate, X_OK)
def __get_java_version(java_prog):
sp = subprocess.Popen([java_prog, '-version'],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
universal_newlines=True)
(x, stderr) = sp.communicate()
retcode = sp.wait()
if retcode != 0:
return JavaVersion.NOT_INSTALLED
pattern = re.compile('(?:jdk|jre|java) version "([0-9]+)\.([0-9]+)\.([0-9]+)[_-]([0-9a-z_-]+)"')
for line in stderr.splitlines():
match = pattern.match(line)
if match is not None:
ver = match.group(2)
return {
'6': JavaVersion.JRE6,
'7': JavaVersion.JRE7,
'8': JavaVersion.JRE8,
'9': JavaVersion.JRE9
}[ver]
return JavaVersion.NOT_INSTALLED