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main.go
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main.go
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// Copyright 2015 ikawaha
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"fmt"
"os"
"path"
"./ipa"
"./uni"
)
var errorWriter = os.Stderr
var subcommands = []struct {
Name string
Description string
Run func([]string) error
}{
// subcommands
{ipa.CommandName, ipa.Description, ipa.Run},
{uni.CommandName, uni.Description, uni.Run},
}
func Usage() {
fmt.Fprintf(errorWriter, "usage: %s <command>\n", path.Base(os.Args[0]))
}
func PrintDefaults() {
fmt.Fprintln(errorWriter, "The commands are:")
for _, c := range subcommands {
fmt.Fprintf(errorWriter, " %s - %s\n", c.Name, c.Description)
}
}
func main() {
if len(os.Args) < 2 {
Usage()
PrintDefaults()
return
}
var cmd func([]string) error
for i := range subcommands {
if os.Args[1] == subcommands[i].Name {
cmd = subcommands[i].Run
}
}
if cmd == nil {
Usage()
PrintDefaults()
return
}
if e := cmd(os.Args[2:]); e != nil {
fmt.Fprintf(errorWriter, "%v\n", e)
os.Exit(1)
}
}