mirror of
https://github.com/xonsh/xonsh.git
synced 2025-03-04 08:24:40 +01:00
151 lines
3.7 KiB
Python
151 lines
3.7 KiB
Python
"""Bash-like interface extensions for xonsh."""
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import re
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import shlex
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import sys
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from xonsh.built_ins import XSH
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__all__ = ()
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def _warn_not_supported(msg: str):
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print(
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f"""Not supported ``{msg}`` in xontrib bashisms.
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PRs are welcome - https://github.com/xonsh/xonsh/blob/main/xontrib/bashisms.py""",
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file=sys.stderr,
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)
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@XSH.builtins.events.on_transform_command
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def bash_preproc(cmd, **kw):
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bang_previous = {
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"!": lambda x: x,
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"$": lambda x: shlex.split(x)[-1],
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"^": lambda x: shlex.split(x)[0],
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"*": lambda x: " ".join(shlex.split(x)[1:]),
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}
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def replace_bang(m):
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arg = m.group(1)
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inputs = XSH.history.inps
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# Dissect the previous command.
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if arg in bang_previous:
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try:
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return bang_previous[arg](inputs[-1])
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except IndexError:
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print(f"xonsh: no history for '!{arg}'")
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return ""
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# Look back in history for a matching command.
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else:
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try:
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return next(x for x in reversed(inputs) if x.startswith(arg))
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except StopIteration:
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print(f"xonsh: no previous commands match '!{arg}'")
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return ""
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return re.sub(r"!([!$^*]|[\w]+)", replace_bang, cmd)
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def alias(args, stdin=None):
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ret = 0
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if args:
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for arg in args:
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if "=" in arg:
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# shlex.split to remove quotes, e.g. "foo='echo hey'" into
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# "foo=echo hey"
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name, cmd = shlex.split(arg)[0].split("=", 1)
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XSH.aliases[name] = shlex.split(cmd)
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elif arg in XSH.aliases:
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print(f"{arg}={XSH.aliases[arg]}")
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else:
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print(f"alias: {arg}: not found", file=sys.stderr)
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ret = 1
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else:
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for alias, cmd in XSH.aliases.items():
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print(f"{alias}={cmd}")
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return ret
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XSH.aliases["alias"] = alias
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XSH.env["THREAD_SUBPROCS"] = False
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def _unset(args):
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if not args:
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print("Usage: unset ENV_VARIABLE", file=sys.stderr)
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for v in args:
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try:
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XSH.env.pop(v)
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except KeyError:
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print(f"{v} not found", file=sys.stderr)
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XSH.aliases["unset"] = _unset
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def _export(args):
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if not args:
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print("Usage: export ENV_VARIABLE=VALUE", file=sys.stderr)
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for eq in args:
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if "=" in eq:
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name, val = shlex.split(eq)[0].split("=", 1)
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XSH.env[name] = val
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else:
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print(f"{eq} equal sign not found", file=sys.stderr)
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XSH.aliases["export"] = _export
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def _set(args):
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arg = args[0]
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if arg == "-e":
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XSH.env["RAISE_SUBPROC_ERROR"] = True
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elif arg == "+e":
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XSH.env["RAISE_SUBPROC_ERROR"] = False
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elif arg == "-x":
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XSH.env["XONSH_TRACE_SUBPROC"] = True
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elif arg == "+x":
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XSH.env["XONSH_TRACE_SUBPROC"] = False
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else:
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_warn_not_supported(f"set {arg}")
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XSH.aliases["set"] = _set
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def _shopt(args):
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supported_shopt = ["DOTGLOB"]
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args_len = len(args)
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if args_len == 0:
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for so in supported_shopt:
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onoff = "on" if so in XSH.env and XSH.env[so] else "off"
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print(f"dotglob\t{onoff}")
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return
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elif args_len < 2 or args[0] in ["-h", "--help"]:
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print(f'Usage: shopt <-s|-u> <{"|".join(supported_shopt).lower()}>')
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return
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opt = args[0]
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optname = args[1]
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if opt == "-s" and optname == "dotglob":
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XSH.env["DOTGLOB"] = True
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elif opt == "-u" and optname == "dotglob":
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XSH.env["DOTGLOB"] = False
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else:
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_warn_not_supported(f"shopt {args}")
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XSH.aliases["shopt"] = _shopt
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XSH.aliases["complete"] = "completer list"
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