def parse_shell(self, value):
"""Parse the supplied shell code in a string, returning the external
commands it executes.
"""
h = hash(str(value))
if h in shellparsecache:
self.execs = shellparsecache[h]["execs"]
return self.execs
if h in shellparsecacheextras:
self.execs = shellparsecacheextras[h]["execs"]
return self.execs
try:
tokens, _ = pyshyacc.parse(value, eof=True, debug=False)
except pyshlex.NeedMore:
raise sherrors.ShellSyntaxError("Unexpected EOF")
for token in tokens:
self.process_tokens(token)
self.execs = set(cmd for cmd in self.allexecs
if cmd not in self.funcdefs)
shellparsecacheextras[h] = {}
shellparsecacheextras[h]["execs"] = self.execs
return self.execs
def _parse_shell(self, value):
try:
tokens, _ = pyshyacc.parse(value, eof=True, debug=False)
except pyshlex.NeedMore:
raise sherrors.ShellSyntaxError("Unexpected EOF")
for token in tokens:
self.process_tokens(token)