#!/usr/bin/env python
"""Test the running system for features availability. Exit with zero
if all features are there, non-zero otherwise. If a feature name is
prefixed with "no-", the absence of feature is tested.
"""
import optparse
import os
import sys
import tempfile
tempprefix = 'hg-hghave-'
def has_symlink():
return hasattr(os, "symlink")
def has_fifo():
return hasattr(os, "mkfifo")
def has_executablebit():
fd, path = tempfile.mkstemp(prefix=tempprefix)
os.close(fd)
try:
s = os.lstat(path).st_mode
os.chmod(path, s | 0100)
return (os.lstat(path).st_mode & 0100 != 0)
finally:
os.remove(path)
def has_eol_in_paths():
try:
fd, path = tempfile.mkstemp(prefix=tempprefix, suffix='\n\r')
os.close(fd)
os.remove(path)
return True
except:
return False
checks = {
"symlink": (has_symlink, "symbolic links"),
"fifo": (has_fifo, "named pipes"),
"execbit": (has_executablebit, "executable bit"),
"eol-in-paths": (has_eol_in_paths, "end-of-lines in paths"),
}
def list_features():
for name, feature in checks.iteritems():
desc = feature[1]
print name + ':', desc
parser = optparse.OptionParser("%prog [options] [features]")
parser.add_option("--list-features", action="store_true",
help="list available features")
parser.add_option("-q", "--quiet", action="store_true",
help="check features silently")
if __name__ == '__main__':
options, args = parser.parse_args()
if options.list_features:
list_features()
sys.exit(0)
quiet = options.quiet
failures = 0
def error(msg):
global failures
if not quiet:
sys.stderr.write(msg + '\n')
failures += 1
for feature in args:
negate = feature.startswith('no-')
if negate:
feature = feature[3:]
if feature not in checks:
error('hghave: unknown feature: ' + feature)
continue
check, desc = checks[feature]
if not negate and not check():
error('hghave: missing feature: ' + desc)
elif negate and check():
error('hghave: unexpected feature: ' + desc)
if failures != 0:
sys.exit(1)