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ee86c2add3
Currently the script will reject any type of contents outside of a section, but we want to be able to have some useful comments at the top of each file to help users understand how they are processed. Signed-off-by: Andrea Bolognani <abologna@redhat.com> Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
105 lines
2.1 KiB
Python
Executable File
105 lines
2.1 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (C) 2023 Red Hat, Inc.
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# SPDX-License-Identifier: LGPL-2.1-or-later
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import sys
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SECTIONS = [
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"[Unit]",
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"[Service]",
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"[Socket]",
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"[Install]",
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]
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def parse_unit(unit_path):
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unit = {}
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current_section = "[Invalid]"
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with open(unit_path) as f:
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for line in f:
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line = line.strip()
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if line == "":
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continue
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# Comments at the very top of the file, outside of any
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# section, are allowed and will not show up in the output
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if line[0] == "#" and current_section == "[Invalid]":
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continue
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if line[0] == "[" and line[-1] == "]":
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if line not in SECTIONS:
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print("Unknown section {}".format(line))
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sys.exit(1)
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current_section = line
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continue
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if current_section not in unit:
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unit[current_section] = []
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unit[current_section].append(line)
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if "[Invalid]" in unit:
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print("Contents found outside of any section")
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sys.exit(1)
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return unit
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def format_unit(unit):
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lines = []
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for section in SECTIONS:
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if section not in unit:
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continue
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lines.append(section)
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for line in unit[section]:
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lines.append(line)
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lines.append("")
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return "\n".join(lines)
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def merge_units(base, extra):
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merged = {}
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for section in SECTIONS:
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if section in extra and section not in base:
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print("Section {} in extra but not in base".format(section))
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sys.exit(1)
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if section not in base:
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continue
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merged[section] = base[section]
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if section not in extra:
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continue
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merged[section].extend(extra[section])
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return merged
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prog = sys.argv[0]
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args = sys.argv[1:]
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if len(args) < 1:
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print("usage: {} BASE [EXTRA]...".format(prog))
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sys.exit(1)
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merged = parse_unit(args[0])
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for arg in args[1:]:
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extra = parse_unit(arg)
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merged = merge_units(merged, extra)
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sys.stdout.write(format_unit(merged))
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