elvish/eval/chdir.go

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package eval
import (
"os"
)
2017-12-23 06:44:32 +08:00
// AddDirer wraps the AddDir function.
type AddDirer interface {
// AddDir adds a directory with the given weight to some storage.
AddDir(dir string, weight float64) error
}
// Chdir changes the current directory. On success it also updates the PWD
// environment variable and records the new directory in the directory history.
// It runs the functions in beforeChdir immediately before changing the
// directory, and the functions in afterChdir immediately after (if chdir was
// successful). It returns nil as long as the directory changing part succeeds.
func (ev *Evaler) Chdir(path string) error {
for _, hook := range ev.beforeChdir {
hook(path)
}
err := os.Chdir(path)
if err != nil {
return err
}
for _, hook := range ev.afterChdir {
hook(path)
}
pwd, err := os.Getwd()
if err != nil {
logger.Println("getwd after cd:", err)
return nil
}
os.Setenv("PWD", pwd)
return nil
}