def Lookup(self, name, exec_required=True):
"""
Returns the path itself (for relative path), the resolve path, or None.
"""
if '/' in name:
if path_stat.exists(name):
return name
else:
return None
# TODO: Could cache this computation to avoid allocating every time for all
# the splitting.
path_val = self.mem.GetVar('PATH')
if path_val.tag == value_e.Str and path_val.s:
path_list = path_val.s.split(':')
else:
path_list = [] # treat as empty path
for path_dir in path_list:
full_path = os_path.join(path_dir, name)
# NOTE: dash and bash only check for EXISTENCE in 'command -v' (and 'type
# -t'). OSH follows mksh and zsh. Note that we can still get EPERM if
# the permissions are changed between check and use.
if exec_required:
found = posix.access(full_path, posix.X_OK)
else:
found = path_stat.exists(full_path) # for 'source'
if found:
return full_path
return None
def _ResolveNames(names, funcs, path_val):
if path_val.tag == value_e.Str:
path_list = path_val.s.split(':')
else:
path_list = [] # treat as empty path
results = []
for name in names:
if name in funcs:
kind = ('function', name)
elif Resolve(name) != builtin_e.NONE:
kind = ('builtin', name)
elif ResolveSpecial(name) != builtin_e.NONE:
kind = ('builtin', name)
elif lex.IsOtherBuiltin(name): # declare, continue, etc.
kind = ('builtin', name)
elif lex.IsKeyword(name):
kind = ('keyword', name)
else:
# Now look for files.
found = False
for path_dir in path_list:
full_path = os_path.join(path_dir, name)
if path_stat.exists(full_path):
kind = ('file', full_path)
found = True
break
if not found: # Nothing printed, but status is 1.
kind = (None, None)
results.append(kind)
return results
def _ResolveFile(name, path_list):
# Now look for files.
for path_dir in path_list:
full_path = os_path.join(path_dir, name)
if path_stat.exists(full_path):
return ('file', full_path)
# Nothing printed, but status is 1.
return (None, None)
def testIsDir(self):
self.assertEqual(True, path_stat.exists('/'))
self.assertEqual(False, path_stat.exists('/nonexistent__ZZZZ'))