internal/control/license.go

 1package control
 2
 3import (
 4	"strings"
 5
 6	"gitbay.org/gitbay/internal/gitutil"
 7)
 8
 9// licenseNames maps content markers to display names, checked in order.
10var licenseChecks = []struct{ marker, name string }{
11	{"MIT License", "MIT"},
12	{"Permission is hereby granted, free of charge", "MIT"},
13	{"Apache License", "Apache-2.0"},
14	{"GNU AFFERO GENERAL PUBLIC LICENSE", "AGPL-3.0"},
15	{"GNU GENERAL PUBLIC LICENSE", "GPL"},
16	{"GNU LESSER GENERAL PUBLIC LICENSE", "LGPL"},
17	{"Mozilla Public License", "MPL-2.0"},
18	{"BSD 3-Clause", "BSD-3-Clause"},
19	{"BSD 2-Clause", "BSD-2-Clause"},
20	{"Redistribution and use in source and binary forms", "BSD"},
21	{"BSD Zero Clause License", "0BSD"},
22	{"Zero Clause BSD", "0BSD"},
23	// ISC is the 0BSD grant plus the notice-retention clause; match on the
24	// clause so title-less 0BSD files don't read as ISC.
25	{"hereby granted, provided that the above copyright notice", "ISC"},
26	{"Permission to use, copy, modify, and/or distribute", "0BSD"},
27	{"This is free and unencumbered software", "Unlicense"},
28	{"CC0", "CC0"},
29}
30
31// DetectLicense reports the repo's license name from a conventional file
32// at the ref root, or "". It lives here because profile show and the
33// web's repo listings both report it.
34func DetectLicense(dir, ref string) string {
35	for _, name := range []string{"LICENSE", "LICENSE.md", "LICENSE.txt", "COPYING", "UNLICENSE"} {
36		raw, err := gitutil.ReadBlob(dir, ref, name, 2048)
37		if err != nil {
38			continue
39		}
40		// Collapse whitespace so markers match across line wraps.
41		text := strings.Join(strings.Fields(string(raw)), " ")
42		for _, c := range licenseChecks {
43			if strings.Contains(text, c.marker) {
44				return c.name
45			}
46		}
47		return "license"
48	}
49	return ""
50}