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from __future__ import annotations
def shebang(exe: str) -> list[str] | None:
"""
:param exe: the executable
:return: the shebang interpreter arguments
"""
# When invoking a command using a shebang line that exceeds the OS shebang limit (e.g. Linux has a limit of 128;
# BINPRM_BUF_SIZE) the invocation will fail. In this case you'd want to replace the shebang invocation with an
# explicit invocation.
# see https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/fs/binfmt_script.c#n34
try:
with open(exe, "rb") as file_handler:
marker = file_handler.read(2)
if marker != b"#!":
return None
shebang_line = file_handler.readline()
except OSError:
return None
try:
decoded = shebang_line.decode("UTF-8")
except UnicodeDecodeError:
return None
return [i.strip() for i in decoded.strip().split() if i.strip()]
__all__ = [
"shebang",
]
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