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buildtags: Format only go:build lines for go 1.18+ (#211)

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```
$ ./tmp/testgo161718.sh ./buildtags/ ./printer/
+ go1.16.8 test ./buildtags/ ./printer/
ok  	github.com/mmcloughlin/avo/buildtags	0.001s
ok  	github.com/mmcloughlin/avo/printer	0.002s
+ go1.17.2 test ./buildtags/ ./printer/
ok  	github.com/mmcloughlin/avo/buildtags	0.001s
ok  	github.com/mmcloughlin/avo/printer	0.002s
+ gotip test ./buildtags/ ./printer/
ok  	github.com/mmcloughlin/avo/buildtags	0.001s
ok  	github.com/mmcloughlin/avo/printer	0.002s
```

Updates #183
This commit is contained in:
Michael McLoughlin
2021-10-30 00:10:16 -07:00
committed by GitHub
parent c48d61faf6
commit 1d235fb56e
1 changed files with 2 additions and 1 deletions
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3
buildtags/syntax.go
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@@ -33,7 +33,8 @@ func Format(t ConstraintsConvertable) (string, error) {
output := ""
for scanner.Scan() {
line := scanner.Text()
if strings.HasPrefix(line, "//") {
if (PlusBuildSyntaxSupported() && strings.HasPrefix(line, "// +build")) ||
(GoBuildSyntaxSupported() && strings.HasPrefix(line, "//go:build")) {
output += line + "\n"
}
}