forked from lix-project/lix
64 lines
2 KiB
Python
64 lines
2 KiB
Python
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#!/usr/bin/env python3
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"""
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This script is a helper for this project's Meson buildsystem, to generate
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manpages as mdbook markdown for nix3 CLI commands. It is an analogue to an
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inline sequence of bash commands in the autoconf+Make buildsystem, which works
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around a limitation in `nix eval --write-to`, in that it refuses to write to any
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directory that already exists.
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Basically, this script is a glorified but hopefully-more-robust version of:
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$ rm -rf $output
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$ nix eval --write-to $output.tmp --expr 'import doc/manual/generate-manpage.nix true
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(builtins.readFile ./generate-manpage.nix)'
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$ mv $output.tmp $output
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"""
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import argparse
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import os.path
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import shlex
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import shutil
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import subprocess
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import sys
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import tempfile
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name = 'generate-manpage.py'
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def log(*args, **kwargs):
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kwargs['file'] = sys.stderr
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return print(f'{name}:', *args, **kwargs)
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def main():
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parser = argparse.ArgumentParser(name)
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parser.add_argument('--nix', required=True, help='Full path to the nix binary to use')
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parser.add_argument('-o', '--output', required=True, help='Output directory')
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parser.add_argument('--generator', required=True, help='Path to generate-manpage.nix')
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parser.add_argument('--cli-json', required=True, help='Path to the nix.json output from Nix')
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args = parser.parse_args()
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with tempfile.TemporaryDirectory() as tempdir:
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temp_out = os.path.join(tempdir, 'new-cli')
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nix_args = [
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args.nix,
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'--experimental-features',
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'nix-command',
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'eval',
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'-I', 'nix/corepkgs=corepkgs',
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'--store', 'dummy://',
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'--impure',
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'--raw',
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'--write-to', temp_out,
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'--expr',
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f'import {args.generator} true (builtins.readFile {args.cli_json})',
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]
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log('generating nix3 man pages with', shlex.join(nix_args))
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subprocess.check_call(nix_args)
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shutil.copytree(temp_out, args.output, dirs_exist_ok=True)
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sys.exit(main())
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