61 lines
870 B
Go
61 lines
870 B
Go
package main
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import (
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"flag"
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"fmt"
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"os"
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"strings"
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"text/template"
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)
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var usagePrefix = `
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warren is a tool for building, deploying and running multiple versions of a Go server
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Usage:
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warren command [args]
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`
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var usageTmpl = template.Must(template.New("usage").Parse(`
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Commands:{{range .}}
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{{.Name | printf "%-10s"}} {{.Summary}}{{end}}
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`))
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var commands = []*Command{
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buildCmd,
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}
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func usage() {
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fmt.Print(usagePrefix)
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usageTmpl.Execute(os.Stdout, commands)
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}
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func main() {
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flag.Usage = usage
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flag.Parse()
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args := flag.Args()
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if len(args) == 0 || args[0] == "-h" {
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flag.Usage()
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return
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}
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var cmd *Command
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name := args[0]
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for _, c := range commands {
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if strings.HasPrefix(c.Name, name) {
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cmd = c
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break
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}
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}
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if cmd == nil {
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fmt.Printf("error: unknown command %q\n", name)
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flag.Usage()
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os.Exit(1)
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}
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cmd.Exec(args[1:])
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}
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