def Run(self, cmd_val):
# type: (cmd_value__Argv) -> int
num_args = len(cmd_val.argv) - 1
if num_args == 0:
# TODO: It's suppose to try another dir before doing this?
self.errfmt.Print_('pushd: no other directory')
return 1
elif num_args > 1:
e_usage('got too many arguments')
# TODO: 'cd' uses normpath? Is that inconsistent?
dest_dir = os_path.abspath(cmd_val.argv[1])
err_num = pyos.Chdir(dest_dir)
if err_num != 0:
self.errfmt.Print_("pushd: %r: %s" %
(dest_dir, posix.strerror(err_num)),
span_id=cmd_val.arg_spids[1])
return 1
self.dir_stack.Push(dest_dir)
_PrintDirStack(self.dir_stack, SINGLE_LINE,
state.MaybeString(self.mem, 'HOME'))
state.ExportGlobalString(self.mem, 'PWD', dest_dir)
self.mem.SetPwd(dest_dir)
return 0
def _PopDirStack(mem, dir_stack, errfmt):
# type: (Mem, DirStack, ErrorFormatter) -> bool
"""Helper for popd and cd { ... }."""
dest_dir = dir_stack.Pop()
if dest_dir is None:
errfmt.Print_('popd: directory stack is empty')
return False
err_num = pyos.Chdir(dest_dir)
if err_num != 0:
# Happens if a directory is deleted in pushing and popping
errfmt.Print_("popd: %r: %s" % (dest_dir, posix.strerror(err_num)))
return False
state.SetGlobalString(mem, 'PWD', dest_dir)
mem.SetPwd(dest_dir)
return True
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.GetValue('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)
err_num = pyos.Chdir(real_dest_dir)
if err_num != 0:
self.errfmt.Print_("cd %r: %s" %
(real_dest_dir, posix.strerror(err_num)),
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
