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Support environments without pip #651

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Support environments without pip #651

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10 changes: 9 additions & 1 deletion flit/install.py
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Original file line number Diff line number Diff line change
Expand Up @@ -249,8 +249,16 @@ def install_requirements(self):
for req_d in requirements
]

# Use either pip in the venv or in the current environment,
# whichever is available.
try:
import pip # noqa: F401
except ImportError:
cmd = [self.python, '-m', 'pip', 'install']
else:
cmd = [sys.executable, '-m', 'pip', 'install', '--python', self.python]

# install the requirements with pip
cmd = [self.python, '-m', 'pip', 'install']
if self.user:
cmd.append('--user')
with tempfile.NamedTemporaryFile(mode='w',
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