/
get_file.go
46 lines (38 loc) · 1010 Bytes
/
get_file.go
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package module
import (
"fmt"
"net/url"
"os"
"path/filepath"
)
// FileGetter is a Getter implementation that will download a module from
// a file scheme.
type FileGetter struct{}
func (g *FileGetter) Get(dst string, u *url.URL) error {
// The source path must exist and be a directory to be usable.
if fi, err := os.Stat(u.Path); err != nil {
return fmt.Errorf("source path error: %s", err)
} else if !fi.IsDir() {
return fmt.Errorf("source path must be a directory")
}
fi, err := os.Lstat(dst)
if err != nil && !os.IsNotExist(err) {
return err
}
// If the destination already exists, it must be a symlink
if err == nil {
mode := fi.Mode()
if mode&os.ModeSymlink == 0 {
return fmt.Errorf("destination exists and is not a symlink")
}
// Remove the destination
if err := os.Remove(dst); err != nil {
return err
}
}
// Create all the parent directories
if err := os.MkdirAll(filepath.Dir(dst), 0755); err != nil {
return err
}
return os.Symlink(u.Path, dst)
}