goose/main.go

60 lines
863 B
Go

package main
import (
"flag"
"fmt"
"os"
"strings"
"text/template"
)
var commands = []*Command{
upCmd,
downCmd,
statusCmd,
createCmd,
}
func main() {
flag.Usage = usage
flag.Parse()
args := flag.Args()
if len(args) == 0 || args[0] == "-h" {
flag.Usage()
return
}
var cmd *Command
name := args[0]
for _, c := range commands {
if strings.HasPrefix(c.Name, name) {
cmd = c
break
}
}
if cmd == nil {
fmt.Printf("error: unknown command %q\n", name)
flag.Usage()
os.Exit(1)
}
cmd.Exec(args[1:])
}
func usage() {
usageTmpl.Execute(os.Stdout, commands)
}
var usageTmpl = template.Must(template.New("usage").Parse(
`goose is a database migration management system for Go projects.
Usage:
goose [options] <subcommand> [subcommand options]
Commands:{{range .}}
{{.Name | printf "%-10s"}} {{.Summary}}{{end}}
`))