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Explicitly make zip preamble options mutually exclusive #21

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Merged
merged 2 commits into from
Oct 17, 2024
Merged

Explicitly make zip preamble options mutually exclusive #21

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e995929
Explicitly make `zip` preamble options mutually exclusive
chrisnovakovic Oct 16, 2024
42ae0b9
Use `slices.DeleteFunc`
chrisnovakovic Oct 17, 2024
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23 changes: 23 additions & 0 deletions main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@ import (
"io/ioutil"
"os"
"path/filepath"
"slices"

"github.com/peterebden/go-cli-init/v5/flags"
"github.com/peterebden/go-cli-init/v5/logging"
Expand All @@ -31,6 +32,20 @@ var javaExcludePrefixes = []string{

var log = logging.MustGetLogger()

// countFunc returns the number of elements in s that satisfy f.
func countFunc[S []E, E comparable](s S, f func(e E) bool) int {
var n int
for {
i := slices.IndexFunc(s, f)
if i == -1 {
break
}
n++
s = s[i+1:]
}
return n
}

func must(err error) {
if err != nil {
log.Fatalf("%s", err)
Expand Down Expand Up @@ -179,6 +194,14 @@ func main() {
os.Exit(0)
}

if countFunc([]string{
opts.Zip.Preamble,
opts.Zip.PreambleFrom,
opts.Zip.PreambleFile,
}, func(s string) bool { return s != "" }) > 1 {
log.Fatal("Only one of --preamble, --preamble_from or --preamble_file may be specified.")
}

if opts.Zip.ExcludeJavaPrefixes {
opts.Zip.ExcludeInternalPrefix = javaExcludePrefixes
}
Expand Down
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