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