utils.go

package main

import (
	"fmt"
	"io"
	"io/ioutil"
	"os"
	"path"
)

func mkDir(dir string) error {
	if len(dir) != 0 {
		info, err := os.Stat(dir)
		if err == nil {
			if !info.IsDir() {
				return fmt.Errorf("'%s' exists and it is not a directory, cannot proceed", dir)
			}
		} else if os.IsNotExist(err) {
			fmt.Printf("MkdirAll '%s'\n", dir)
			return os.MkdirAll(dir, 0755)
		} else {
			return err
		}
	}
	return nil
}

func (e *mwe) print() {
	fmt.Println("args:")
	for _, a := range e.args {
		fmt.Println("-", a)
	}
	fmt.Println("entrypoint:", e.entry)
	fmt.Println("directory: ", e.dir)
	fmt.Println("files:")
	for _, s := range e.snippets {
		fmt.Println("-", s.name)
	}
}

/*
func (es *mwes) print() {
	for x, e := range *es {
		fmt.Println("\nMWE", x)
		e.print()
	}
}
*/

func copy(src, dst, name string, isdir bool) error {
	srcfp := path.Join(src, name)
	dstfp := path.Join(dst, name)
	if isdir {
		return copyDir(srcfp, dstfp)
	}
	return copyFile(srcfp, dstfp)
}

// copy a directory recursively
func copyDir(src string, dst string) error {
	srcinfo, err := os.Stat(src)
	if err != nil {
		return err
	}
	if err = os.MkdirAll(dst, srcinfo.Mode()); err != nil {
		return err
	}
	fds, err := ioutil.ReadDir(src)
	if err != nil {
		return err
	}
	for _, fd := range fds {
		err = copy(src, dst, fd.Name(), fd.IsDir())
		if err != nil {
			return err
		}
	}
	return nil
}

func copyFile(src, dst string) error {
	srcfd, err := os.Open(src)
	if err != nil {
		return err
	}
	defer srcfd.Close()
	dstfd, err := os.Create(dst)
	if err != nil {
		return err
	}
	defer dstfd.Close()
	_, err = io.Copy(dstfd, srcfd)
	if err != nil {
		return err
	}
	srcinfo, err := os.Stat(src)
	if err != nil {
		return err
	}
	return os.Chmod(dst, srcinfo.Mode())
}