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// Copyright 2015 Canonical Ltd.
// Licensed under the LGPLv3, see LICENCE file for details.
package shell
import (
"fmt"
"os"
"time"
"github.com/juju/utils"
"github.com/juju/utils/filepath"
)
// unixRenderer is the base shell renderer for "unix" shells.
type unixRenderer struct {
filepath.UnixRenderer
}
// Quote implements Renderer.
func (unixRenderer) Quote(str string) string {
// This *may* not be correct for *all* unix shells...
return utils.ShQuote(str)
}
// ExeSuffix implements Renderer.
func (unixRenderer) ExeSuffix() string {
return ""
}
// Mkdir implements Renderer.
func (ur unixRenderer) Mkdir(dirname string) []string {
dirname = ur.Quote(dirname)
return []string{
fmt.Sprintf("mkdir %s", dirname),
}
}
// MkdirAll implements Renderer.
func (ur unixRenderer) MkdirAll(dirname string) []string {
dirname = ur.Quote(dirname)
return []string{
fmt.Sprintf("mkdir -p %s", dirname),
}
}
// Chmod implements Renderer.
func (ur unixRenderer) Chmod(path string, perm os.FileMode) []string {
path = ur.Quote(path)
return []string{
fmt.Sprintf("chmod %04o %s", perm, path),
}
}
// Chown implements Renderer.
func (ur unixRenderer) Chown(path, owner, group string) []string {
path = ur.Quote(path)
return []string{
fmt.Sprintf("chown %s:%s %s", owner, group, path),
}
}
// Touch implements Renderer.
func (ur unixRenderer) Touch(path string, timestamp *time.Time) []string {
path = ur.Quote(path)
var opt string
if timestamp != nil {
opt = timestamp.Format("-t 200601021504.05 ")
}
return []string{
fmt.Sprintf("touch %s%s", opt, path),
}
}
// WriteFile implements Renderer.
func (ur unixRenderer) WriteFile(filename string, data []byte) []string {
filename = ur.Quote(filename)
return []string{
// An alternate approach would be to use printf.
fmt.Sprintf("cat > %s << 'EOF'\n%s\nEOF", filename, data),
}
}
func (unixRenderer) outFD(name string) (int, bool) {
fd, ok := ResolveFD(name)
if !ok || fd <= 0 {
return -1, false
}
return fd, true
}
// RedirectFD implements OutputRenderer.
func (ur unixRenderer) RedirectFD(dst, src string) []string {
dstFD, ok := ur.outFD(dst)
if !ok {
return nil
}
srcFD, ok := ur.outFD(src)
if !ok {
return nil
}
return []string{
fmt.Sprintf("exec %d>&%d", srcFD, dstFD),
}
}
// RedirectOutput implements OutputRenderer.
func (ur unixRenderer) RedirectOutput(filename string) []string {
filename = ur.Quote(filename)
return []string{
"exec >> " + filename,
}
}
// RedirectOutputReset implements OutputRenderer.
func (ur unixRenderer) RedirectOutputReset(filename string) []string {
filename = ur.Quote(filename)
return []string{
"exec > " + filename,
}
}
// ScriptFilename implements ScriptWriter.
func (ur *unixRenderer) ScriptFilename(name, dirname string) string {
return ur.Join(dirname, name+".sh")
}
// ScriptPermissions implements ScriptWriter.
func (ur *unixRenderer) ScriptPermissions() os.FileMode {
return 0755
}
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