53 lines
806 B
Go
53 lines
806 B
Go
// command svsort sorts lines of text by semver at beginning of line
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package main
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import (
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"bufio"
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"bytes"
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"fmt"
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"log"
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"net"
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"os"
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"sort"
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"strings"
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)
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type lines []string
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func (l lines) Len() int { return len(l) }
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func (l lines) Swap(i, j int) { l[i], l[j] = l[j], l[i] }
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func (l lines) Less(i, j int) bool {
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var a, b net.IP
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for _, s := range strings.Fields(l[i]) {
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a = net.ParseIP(s)
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if a != nil {
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break
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}
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}
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for _, s := range strings.Fields(l[j]) {
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b = net.ParseIP(s)
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if b != nil {
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break
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}
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}
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return bytes.Compare(a, b) < 0
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}
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func main() {
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s := bufio.NewScanner(os.Stdin)
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ls := lines{}
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for s.Scan() {
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ls = append(ls, s.Text())
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}
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if err := s.Err(); err != nil {
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log.Fatalf("scan: %v")
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}
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sort.Sort(ls)
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for _, l := range ls {
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fmt.Printf("%v\n", l)
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}
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}
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