genutil.go RawHistoryFolder

1// Package genutil holds header helpers shared by the client and server
2// generators.
3package genutil
4
5import "strings"
6
7// CommentBlock renders text as "// "-prefixed lines, one per line of text,
8// each ending in a newline. Surrounding whitespace of text and of every line
9// is dropped. Empty text yields "".
10func CommentBlock(text string) string {
11	text = strings.TrimSpace(text)
12	if text == "" {
13		return ""
14	}
15	var b strings.Builder
16	for _, line := range strings.Split(text, "\n") {
17		b.WriteString("// ")
18		b.WriteString(strings.TrimSpace(line))
19		b.WriteByte('\n')
20	}
21	return b.String()
22}
23
24// SPDXID returns the SPDX identifier to print in an
25// "SPDX-License-Identifier:" header line, or "" when id is empty or the
26// upstream copyright text already holds that exact line.
27func SPDXID(id, copyright string) string {
28	id = strings.TrimSpace(id)
29	if id == "" {
30		return ""
31	}
32	line := "SPDX-License-Identifier: " + id
33	for _, l := range strings.Split(copyright, "\n") {
34		if strings.TrimSpace(l) == line {
35			return ""
36		}
37	}
38	return id
39}