mirror of
https://github.com/Luzifer/vercmp.git
synced 2024-10-18 05:54:22 +00:00
60 lines
1,004 B
Go
60 lines
1,004 B
Go
package main
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import (
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"fmt"
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"log"
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"os"
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"github.com/blang/semver/v4"
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"github.com/Luzifer/rconfig/v2"
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)
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const usage = `
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Compare version numbers using SemVer version logic
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Usage: vercmp <ver1> <ver2>
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Output values:
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< 0 : if ver1 < ver2
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0 : if ver1 == ver2
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> 0 : if ver1 > ver2
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`
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var (
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cfg = struct {
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VersionAndExit bool `flag:"version" default:"false" description:"Prints current version and exits"`
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}{}
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version = "dev"
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)
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func init() {
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if err := rconfig.ParseAndValidate(&cfg); err != nil {
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log.Fatalf("Unable to parse commandline options: %s", err)
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}
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if cfg.VersionAndExit {
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fmt.Printf("vercmp %s\n", version)
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os.Exit(0)
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}
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}
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func main() {
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if len(rconfig.Args()) != 3 {
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fmt.Println(usage)
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os.Exit(2)
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}
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ver1, err := semver.Make(rconfig.Args()[1])
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if err != nil {
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log.Fatalf("Unable to parse ver1: %s", err)
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}
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ver2, err := semver.Make(rconfig.Args()[2])
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if err != nil {
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log.Fatalf("Unable to parse ver2: %s", err)
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}
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fmt.Println(ver1.Compare(ver2))
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}
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