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"""Bash-like interface extensions for xonsh."""
import shlex
import sys
import re
import builtins
__all__ = ()
@events.on_transform_command
def bash_preproc(cmd, **kw):
bang_previous = {
"!": lambda x: x,
"$": lambda x: shlex.split(x)[-1],
"^": lambda x: shlex.split(x)[0],
"*": lambda x: " ".join(shlex.split(x)[1:]),
}
def replace_bang(m):
arg = m.group(1)
inputs = __xonsh__.history.inps
# Dissect the previous command.
if arg in bang_previous:
try:
return bang_previous[arg](inputs[-1])
except IndexError:
print("xonsh: no history for '!{}'".format(arg))
return ""
# Look back in history for a matching command.
else:
try:
return next((x for x in reversed(inputs) if x.startswith(arg)))
except StopIteration:
print("xonsh: no previous commands match '!{}'".format(arg))
return ""
return re.sub(r"!([!$^*]|[\w]+)", replace_bang, cmd)
def alias(args, stdin=None):
ret = 0
if args:
for arg in args:
if "=" in arg:
# shlex.split to remove quotes, e.g. "foo='echo hey'" into
# "foo=echo hey"
name, cmd = shlex.split(arg)[0].split("=", 1)
aliases[name] = shlex.split(cmd)
elif arg in aliases:
print("{}={}".format(arg, aliases[arg]))
else:
print("alias: {}: not found".format(arg), file=sys.stderr)
ret = 1
else:
for alias, cmd in aliases.items():
print("{}={}".format(alias, cmd))
return ret
aliases["alias"] = alias
builtins.__xonsh__.env["THREAD_SUBPROCS"] = False
def _unset(args):
if not args:
print("Usage: unset ENV_VARIABLE", file=sys.stderr)
for v in args:
try:
__xonsh__.env.pop(v)
except KeyError:
print(f"{v} not found", file=sys.stderr)
aliases["unset"] = _unset
def _export(args):
if not args:
print("Usage: export ENV_VARIABLE=VALUE", file=sys.stderr)
for eq in args:
if "=" in eq:
name, val = shlex.split(eq)[0].split("=", 1)
__xonsh__.env[name] = val
else:
print(f"{eq} equal sign not found", file=sys.stderr)
aliases["export"] = _export
def _set(args):
arg = args[0]
if arg == "-e":
__xonsh__.env["RAISE_SUBPROC_ERROR"] = True
elif arg == "+e":
__xonsh__.env["RAISE_SUBPROC_ERROR"] = False
elif arg == "-x":
__xonsh__.env["XONSH_TRACE_SUBPROC"] = True
elif arg == "+x":
__xonsh__.env["XONSH_TRACE_SUBPROC"] = False
else:
print(
"Not supported in xontrib bashisms.\nPRs are welcome - https://github.com/xonsh/xonsh/blob/master/xontrib/bashisms.py",
file=sys.stderr,
)
aliases["set"] = _set
def _shopt(args):
supported_shopt = ["DOTGLOB"]
args_len = len(args)
if args_len == 0:
for so in supported_shopt:
onoff = "on" if so in __xonsh__.env and __xonsh__.env[so] else "off"
print(f"dotglob\t{onoff}")
return
elif args_len < 2 or args[0] in ["-h", "--help"]:
print(f'Usage: shopt <-s|-u> <{"|".join(supported_shopt).lower()}>')
return
opt = args[0]
optname = args[1]
if opt == "-s" and optname == "dotglob":
__xonsh__.env["DOTGLOB"] = True
elif opt == "-u" and optname == "dotglob":
__xonsh__.env["DOTGLOB"] = False
else:
print(
"Not supported in xontrib bashisms.\nPRs are welcome - https://github.com/xonsh/xonsh/blob/master/xontrib/bashisms.py",
file=sys.stderr,
)
aliases["shopt"] = _shopt
aliases["complete"] = "completer list"
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