def Run(self, cmd_val):
# type: (cmd_value__Argv) -> int
attrs, arg_r = flag_spec.ParseCmdVal('cd', cmd_val)
arg = arg_types.cd(attrs.attrs)
dest_dir, arg_spid = arg_r.Peek2()
if dest_dir is None:
val = self.mem.GetVar('HOME')
try:
dest_dir = state.GetString(self.mem, 'HOME')
except error.Runtime as e:
self.errfmt.Print_(e.UserErrorString())
return 1
if dest_dir == '-':
try:
dest_dir = state.GetString(self.mem, 'OLDPWD')
print(dest_dir) # Shells print the directory
except error.Runtime as e:
self.errfmt.Print_(e.UserErrorString())
return 1
try:
pwd = state.GetString(self.mem, 'PWD')
except error.Runtime as e:
self.errfmt.Print_(e.UserErrorString())
return 1
# Calculate new directory, chdir() to it, then set PWD to it. NOTE: We can't
# call posix.getcwd() because it can raise OSError if the directory was
# removed (ENOENT.)
abspath = os_path.join(pwd, dest_dir) # make it absolute, for cd ..
if arg.P:
# -P means resolve symbolic links, then process '..'
real_dest_dir = libc.realpath(abspath)
else:
# -L means process '..' first. This just does string manipulation. (But
# realpath afterward isn't correct?)
real_dest_dir = os_path.normpath(abspath)
try:
posix.chdir(real_dest_dir)
except OSError as e:
self.errfmt.Print_("cd %r: %s" %
(real_dest_dir, pyutil.strerror_OS(e)),
span_id=arg_spid)
return 1
state.ExportGlobalString(self.mem, 'PWD', real_dest_dir)
# WEIRD: We need a copy that is NOT PWD, because the user could mutate PWD.
# Other shells use global variables.
self.mem.SetPwd(real_dest_dir)
if cmd_val.block:
self.dir_stack.Push(real_dest_dir)
try:
unused = self.cmd_ev.EvalBlock(cmd_val.block)
finally: # TODO: Change this to a context manager.
# note: it might be more consistent to use an exception here.
if not _PopDirStack(self.mem, self.dir_stack, self.errfmt):
return 1
else: # No block
state.ExportGlobalString(self.mem, 'OLDPWD', pwd)
self.dir_stack.Reset() # for pushd/popd/dirs
return 0
def __call__(self, cmd_val):
arg, i = CD_SPEC.ParseCmdVal(cmd_val)
try:
dest_dir = cmd_val.argv[i]
except IndexError:
val = self.mem.GetVar('HOME')
if val.tag == value_e.Undef:
self.errfmt.Print("$HOME isn't defined")
return 1
elif val.tag == value_e.Str:
dest_dir = val.s
elif val.tag == value_e.MaybeStrArray:
# User would have to unset $HOME to get rid of exported flag
self.errfmt.Print("$HOME shouldn't be an array")
return 1
if dest_dir == '-':
old = self.mem.GetVar('OLDPWD', scope_e.GlobalOnly)
if old.tag == value_e.Undef:
self.errfmt.Print('$OLDPWD not set')
return 1
elif old.tag == value_e.Str:
dest_dir = old.s
print(dest_dir) # Shells print the directory
elif old.tag == value_e.MaybeStrArray:
# TODO: Prevent the user from setting OLDPWD to array (or maybe they
# can't even set it at all.)
raise AssertionError('Invalid $OLDPWD')
pwd = self.mem.GetVar('PWD')
assert pwd.tag == value_e.Str, pwd # TODO: Need a general scheme to avoid
# Calculate new directory, chdir() to it, then set PWD to it. NOTE: We can't
# call posix.getcwd() because it can raise OSError if the directory was
# removed (ENOENT.)
abspath = os_path.join(pwd.s, dest_dir) # make it absolute, for cd ..
if arg.P:
# -P means resolve symbolic links, then process '..'
real_dest_dir = libc.realpath(abspath)
else:
# -L means process '..' first. This just does string manipulation. (But
# realpath afterward isn't correct?)
real_dest_dir = os_path.normpath(abspath)
try:
posix.chdir(real_dest_dir)
except OSError as e:
self.errfmt.Print("cd %r: %s",
real_dest_dir,
posix.strerror(e.errno),
span_id=cmd_val.arg_spids[i])
return 1
state.ExportGlobalString(self.mem, 'PWD', real_dest_dir)
# WEIRD: We need a copy that is NOT PWD, because the user could mutate PWD.
# Other shells use global variables.
self.mem.SetPwd(real_dest_dir)
if cmd_val.block:
self.dir_stack.Push(real_dest_dir)
try:
unused = self.ex.EvalBlock(cmd_val.block)
finally: # TODO: Change this to a context manager.
_PopDirStack(self.mem, self.dir_stack, self.errfmt)
else: # No block
state.ExportGlobalString(self.mem, 'OLDPWD', pwd.s)
self.dir_stack.Reset() # for pushd/popd/dirs
return 0