249 lines
7.4 KiB
Python
249 lines
7.4 KiB
Python
import collections
|
|
import contextlib
|
|
import os
|
|
import re
|
|
import signal
|
|
import subprocess
|
|
import sys
|
|
from pathlib import Path
|
|
from shutil import get_terminal_size
|
|
|
|
from pipenv.utils.shell import temp_environ
|
|
from pipenv.vendor import shellingham
|
|
|
|
ShellDetectionFailure = shellingham.ShellDetectionFailure
|
|
|
|
|
|
def _build_info(value):
|
|
return (os.path.splitext(os.path.basename(value))[0], value)
|
|
|
|
|
|
def detect_info(project):
|
|
if project.s.PIPENV_SHELL_EXPLICIT:
|
|
return _build_info(project.s.PIPENV_SHELL_EXPLICIT)
|
|
try:
|
|
return shellingham.detect_shell()
|
|
except (shellingham.ShellDetectionFailure, TypeError):
|
|
if project.s.PIPENV_SHELL:
|
|
return _build_info(project.s.PIPENV_SHELL)
|
|
raise ShellDetectionFailure
|
|
|
|
|
|
def _get_activate_script(cmd, venv):
|
|
"""Returns the string to activate a virtualenv.
|
|
|
|
This is POSIX-only at the moment since the compat (pexpect-based) shell
|
|
does not work elsewhere anyway.
|
|
"""
|
|
# Suffix and source command for other shells.
|
|
# Support for fish shell.
|
|
if "fish" in cmd:
|
|
suffix = ".fish"
|
|
command = "source"
|
|
# Support for csh shell.
|
|
elif "csh" in cmd:
|
|
suffix = ".csh"
|
|
command = "source"
|
|
elif "xonsh" in cmd:
|
|
suffix = ".xsh"
|
|
command = "source"
|
|
elif "nu" in cmd:
|
|
suffix = ".nu"
|
|
command = "overlay use"
|
|
else:
|
|
suffix = ""
|
|
command = "."
|
|
# Escape any special characters located within the virtualenv path to allow
|
|
# for proper activation.
|
|
venv_location = re.sub(r"([ &$()\[\]])", r"\\\1", str(venv))
|
|
# The leading space can make history cleaner in some shells.
|
|
return f" {command} {venv_location}/bin/activate{suffix}"
|
|
|
|
|
|
def _handover(cmd, args):
|
|
args = [cmd] + args
|
|
if os.name != "nt":
|
|
os.execvp(cmd, args)
|
|
else:
|
|
sys.exit(subprocess.call(args, shell=True, universal_newlines=True))
|
|
|
|
|
|
class Shell:
|
|
def __init__(self, cmd):
|
|
self.cmd = cmd
|
|
self.args = []
|
|
|
|
def __repr__(self):
|
|
return "{type(self).__name__}(cmd={self.cmd!r})"
|
|
|
|
@contextlib.contextmanager
|
|
def inject_path(self, venv):
|
|
with temp_environ():
|
|
os.environ["PATH"] = "{}{}{}".format(
|
|
os.pathsep.join(str(p.parent) for p in _iter_python(venv)),
|
|
os.pathsep,
|
|
os.environ["PATH"],
|
|
)
|
|
yield
|
|
|
|
def fork(self, venv, cwd, args):
|
|
# FIXME: This isn't necessarily the correct prompt. We should read the
|
|
# actual prompt by peeking into the activation script.
|
|
name = os.path.basename(venv)
|
|
os.environ["VIRTUAL_ENV"] = str(venv)
|
|
if "PROMPT" in os.environ:
|
|
os.environ["PROMPT"] = "({}) {}".format(name, os.environ["PROMPT"])
|
|
if "PS1" in os.environ:
|
|
os.environ["PS1"] = "({}) {}".format(name, os.environ["PS1"])
|
|
with self.inject_path(venv):
|
|
os.chdir(cwd)
|
|
_handover(self.cmd, self.args + list(args))
|
|
|
|
def fork_compat(self, venv, cwd, args):
|
|
from .vendor import pexpect
|
|
|
|
# Grab current terminal dimensions to replace the hardcoded default
|
|
# dimensions of pexpect.
|
|
dims = get_terminal_size()
|
|
with temp_environ():
|
|
c = pexpect.spawn(self.cmd, ["-i"], dimensions=(dims.lines, dims.columns))
|
|
c.sendline(_get_activate_script(self.cmd, venv))
|
|
if args:
|
|
c.sendline(" ".join(args))
|
|
|
|
# Handler for terminal resizing events
|
|
# Must be defined here to have the shell process in its context, since
|
|
# we can't pass it as an argument
|
|
def sigwinch_passthrough(sig, data):
|
|
dims = get_terminal_size()
|
|
c.setwinsize(dims.lines, dims.columns)
|
|
|
|
signal.signal(signal.SIGWINCH, sigwinch_passthrough)
|
|
|
|
# Interact with the new shell.
|
|
c.interact(escape_character=None)
|
|
c.close()
|
|
sys.exit(c.exitstatus)
|
|
|
|
|
|
POSSIBLE_ENV_PYTHON = [Path("bin", "python"), Path("Scripts", "python.exe")]
|
|
|
|
|
|
def _iter_python(venv):
|
|
for path in POSSIBLE_ENV_PYTHON:
|
|
full_path = Path(venv, path)
|
|
if full_path.is_file():
|
|
yield full_path
|
|
|
|
|
|
class Bash(Shell):
|
|
def _format_path(self, python):
|
|
return python.parent.as_posix()
|
|
|
|
# The usual PATH injection technique does not work with Bash.
|
|
# https://github.com/berdario/pew/issues/58#issuecomment-102182346
|
|
@contextlib.contextmanager
|
|
def inject_path(self, venv):
|
|
from tempfile import NamedTemporaryFile
|
|
|
|
bashrc_path = Path.home().joinpath(".bashrc")
|
|
with NamedTemporaryFile("w+") as rcfile:
|
|
if bashrc_path.is_file():
|
|
base_rc_src = f'source "{bashrc_path.as_posix()}"\n'
|
|
rcfile.write(base_rc_src)
|
|
|
|
export_path = 'export PATH="{}:$PATH"\n'.format(
|
|
":".join(self._format_path(python) for python in _iter_python(venv))
|
|
)
|
|
rcfile.write(export_path)
|
|
rcfile.flush()
|
|
self.args.extend(["--rcfile", rcfile.name])
|
|
yield
|
|
|
|
|
|
class MsysBash(Bash):
|
|
def _format_path(self, python):
|
|
s = super()._format_path(python)
|
|
if not python.drive:
|
|
return s
|
|
# Convert "C:/something" to "/c/something".
|
|
return f"/{s[0].lower()}{s[2:]}"
|
|
|
|
|
|
class CmderEmulatedShell(Shell):
|
|
def fork(self, venv, cwd, args):
|
|
if cwd:
|
|
os.environ["CMDER_START"] = cwd
|
|
super().fork(venv, cwd, args)
|
|
|
|
|
|
class CmderCommandPrompt(CmderEmulatedShell):
|
|
def fork(self, venv, cwd, args):
|
|
rc = os.path.expandvars("%CMDER_ROOT%\\vendor\\init.bat")
|
|
if os.path.exists(rc):
|
|
self.args.extend(["/k", rc])
|
|
super().fork(venv, cwd, args)
|
|
|
|
|
|
class CmderPowershell(Shell):
|
|
def fork(self, venv, cwd, args):
|
|
rc = os.path.expandvars("%CMDER_ROOT%\\vendor\\profile.ps1")
|
|
if os.path.exists(rc):
|
|
self.args.extend(
|
|
[
|
|
"-ExecutionPolicy",
|
|
"Bypass",
|
|
"-NoLogo",
|
|
"-NoProfile",
|
|
"-NoExit",
|
|
"-Command",
|
|
f"Invoke-Expression '. ''{rc}'''",
|
|
]
|
|
)
|
|
super().fork(venv, cwd, args)
|
|
|
|
|
|
# Two dimensional dict. First is the shell type, second is the emulator type.
|
|
# Example: SHELL_LOOKUP['powershell']['cmder'] => CmderPowershell.
|
|
SHELL_LOOKUP = collections.defaultdict(
|
|
lambda: collections.defaultdict(lambda: Shell),
|
|
{
|
|
"bash": collections.defaultdict(
|
|
lambda: Bash,
|
|
{"msys": MsysBash},
|
|
),
|
|
"cmd": collections.defaultdict(
|
|
lambda: Shell,
|
|
{"cmder": CmderCommandPrompt},
|
|
),
|
|
"powershell": collections.defaultdict(
|
|
lambda: Shell,
|
|
{"cmder": CmderPowershell},
|
|
),
|
|
"pwsh": collections.defaultdict(
|
|
lambda: Shell,
|
|
{"cmder": CmderPowershell},
|
|
),
|
|
},
|
|
)
|
|
|
|
|
|
def _detect_emulator():
|
|
keys = []
|
|
if os.environ.get("CMDER_ROOT"):
|
|
keys.append("cmder")
|
|
if os.environ.get("MSYSTEM"):
|
|
keys.append("msys")
|
|
return ",".join(keys)
|
|
|
|
|
|
def choose_shell(project):
|
|
emulator = project.s.PIPENV_EMULATOR.lower() or _detect_emulator()
|
|
type_, command = detect_info(project)
|
|
shell_types = SHELL_LOOKUP[type_]
|
|
for key in emulator.split(","):
|
|
key = key.strip().lower()
|
|
if key in shell_types:
|
|
return shell_types[key](command)
|
|
return shell_types[""](command)
|