homemaker/homemaker.go

127 lines
3.0 KiB
Go

/*
* Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
* Author: Alex Yatskov <alex@foosoft.net>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package main
import (
"encoding/json"
"flag"
"fmt"
"github.com/naoina/toml"
"gopkg.in/yaml.v2"
"io/ioutil"
"log"
"os"
"os/user"
"path"
"path/filepath"
)
const (
optClobber = 1 << 0
optForce = 1 << 1
optVerbose = 1 << 2
)
func parse(filename string) (*config, error) {
bytes, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
conf := &config{}
switch path.Ext(filename) {
case ".json":
if err := json.Unmarshal(bytes, &conf); err != nil {
return nil, err
}
case ".toml":
if err := toml.Unmarshal(bytes, &conf); err != nil {
return nil, err
}
case ".yaml":
if err := yaml.Unmarshal(bytes, &conf); err != nil {
return nil, err
}
default:
return nil, fmt.Errorf("unsupported configuration file format")
}
return conf, nil
}
func usage() {
fmt.Printf("Usage: %s [options] conf_file [src_dir]\n\n", os.Args[0])
fmt.Print("Parameters:\n")
flag.PrintDefaults()
}
func makeAbsPath(path string) string {
path, err := filepath.Abs(path)
if err != nil {
log.Fatal(err)
}
return path
}
func main() {
currUsr, err := user.Current()
if err != nil {
log.Fatal(err)
}
taskName := flag.String("task", "default", "name of task to execute")
dstDir := flag.String("dest", currUsr.HomeDir, "target directory for tasks")
force := flag.Bool("force", true, "create parent directories to target")
clobber := flag.Bool("clobber", false, "delete files and directories at target")
verbose := flag.Bool("verbose", false, "verbose output")
flag.Usage = usage
flag.Parse()
flags := 0
if *clobber {
flags |= optClobber
}
if *force {
flags |= optForce
}
if *verbose {
flags |= optVerbose
}
if flag.NArg() == 2 {
conf, err := parse(flag.Arg(0))
if err != nil {
log.Fatal(err)
}
if err := conf.process(makeAbsPath(flag.Arg(1)), makeAbsPath(*dstDir), *taskName, flags); err != nil {
log.Fatal(err)
}
} else {
usage()
os.Exit(2)
}
}