39 lines
1.1 KiB
Python
39 lines
1.1 KiB
Python
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import os
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import subprocess as sp
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import sys
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import urllib.request
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def is_nix_available():
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nix_installed = False
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try:
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sp.run(['nix', '--version'], check=True, capture_output=True)
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nix_installed = True
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except FileNotFoundError:
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pass
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return nix_installed
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def ensure_nix():
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if is_nix_available():
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return
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print("The nix package manager is required! Install it now? [Y/n]: ", end='')
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try:
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answer = input()
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if not answer or answer[0].lower() != 'y':
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exit(1)
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except KeyboardInterrupt:
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exit(1)
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with urllib.request.urlopen('https://nixos.org/nix/install') as f:
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install_script = f.read()
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read, write = os.pipe()
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os.write(write, install_script)
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os.close(write)
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proc = sp.run('bash', stdin=read)
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if proc.returncode:
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print("Error while installing nix. Please check https://nixos.org/download.html for manual installation.",
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file=sys.stderr)
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exit(1)
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print('Please activate nix like described above, then re-run mach-nix.')
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exit(0)
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