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Don't crash when an executable is not found

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This commit is contained in:
Anthony Sottile 2016-05-20 13:22:13 -07:00
parent da7e85c851
commit 5a6b6e81e9
5 changed files with 37 additions and 13 deletions
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8
pre_commit/parse_shebang.py
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@ -12,6 +12,10 @@ from pre_commit import five
printable = frozenset(string.printable)
class ExecutableNotFoundError(OSError):
pass
def parse_bytesio(bytesio):
"""Parse the shebang from a file opened for reading binary."""
if bytesio.read(2) != b'#!':
@ -70,7 +74,9 @@ def normexe(orig_exe):
if os.sep not in orig_exe:
exe = find_executable(orig_exe)
if exe is None:
raise OSError('Executable {0} not found'.format(orig_exe))
raise ExecutableNotFoundError(
'Executable `{0}` not found'.format(orig_exe),
)
return exe
else:
return orig_exe