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Fix/5147 #5170

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Fix/5147 #5170

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c47970f
Don't show stacktrace only error message on invalid requirement.
venthur Apr 5, 2018
f9e71b6
Added news fragment
venthur Apr 5, 2018
fd7a5ec
Fixed brain-o
venthur Apr 5, 2018
ff6b4e2
Modified test for traceback to test that it is *not* there.
venthur Apr 5, 2018
bdb931b
Provide condensed error message
venthur Apr 6, 2018
9434932
fail gracefully in python 2.x
venthur Apr 6, 2018
00e6689
Simplify
venthur Apr 6, 2018
ece5c30
Merge branch 'master' into fix/5147
venthur Jun 7, 2018
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2 changes: 2 additions & 0 deletions news/5147.bugfix
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Don't output stack trace when `pip install` is called with an invalid
requirement.
6 changes: 4 additions & 2 deletions src/pip/_internal/req/req_install.py
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Expand Up @@ -250,14 +250,16 @@ def from_line(
if req is not None:
try:
req = Requirement(req)
except InvalidRequirement:
except InvalidRequirement as e:
if os.path.sep in req:
add_msg = "It looks like a path."
add_msg += deduce_helpful_msg(req)
elif '=' in req and not any(op in req for op in operators):
add_msg = "= is not a valid operator. Did you mean == ?"
else:
add_msg = traceback.format_exc()
msg = str(e)
msg = msg.replace('Invalid requirement, ', '')
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This replace() seems brittle and hacky to me, but I'll let others weigh in. The packaging project probably shouldn't be including this string to begin with since it's redundant with the exception class being InvalidRequirement.

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Agreed I've created a PR against packaging fixing that: pypa/packaging#129

add_msg = msg
raise InstallationError(
"Invalid requirement: '%s'\n%s" % (req, add_msg))
return cls(
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11 changes: 9 additions & 2 deletions tests/unit/test_req.py
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Expand Up @@ -537,12 +537,19 @@ def test_single_equal_sign(self):
assert "Invalid requirement" in err_msg
assert "= is not a valid operator. Did you mean == ?" in err_msg

def test_traceback(self):
def test_no_traceback(self):
with pytest.raises(InstallationError) as e:
InstallRequirement.from_line('toto 42')
err_msg = e.value.args[0]
assert "Invalid requirement" in err_msg
assert "\nTraceback " in err_msg
assert "Traceback" not in err_msg

def test_error_hint(self):
with pytest.raises(InstallationError) as e:
InstallRequirement.from_line('toto 42')
err_msg = e.value.args[0]
assert "Invalid requirement" in err_msg
assert "parse error at" in err_msg

def test_requirement_file(self):
req_file_path = os.path.join(self.tempdir, 'test.txt')
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