61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
package module
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import (
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"fmt"
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"os"
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"path/filepath"
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"runtime"
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)
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// FileDetector implements Detector to detect file paths.
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type FileDetector struct{}
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func (d *FileDetector) Detect(src, pwd string) (string, bool, error) {
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if len(src) == 0 {
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return "", false, nil
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}
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if !filepath.IsAbs(src) {
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if pwd == "" {
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return "", true, fmt.Errorf(
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"relative paths require a module with a pwd")
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}
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// Stat the pwd to determine if its a symbolic link. If it is,
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// then the pwd becomes the original directory. Otherwise,
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// `filepath.Join` below does some weird stuff.
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//
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// We just ignore if the pwd doesn't exist. That error will be
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// caught later when we try to use the URL.
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if fi, err := os.Lstat(pwd); !os.IsNotExist(err) {
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if err != nil {
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return "", true, err
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}
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if fi.Mode()&os.ModeSymlink != 0 {
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pwd, err = os.Readlink(pwd)
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if err != nil {
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return "", true, err
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}
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}
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}
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src = filepath.Join(pwd, src)
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}
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return fmtFileURL(src), true, nil
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}
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func fmtFileURL(path string) string {
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if runtime.GOOS == "windows" {
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// Make sure we're using "/" on Windows. URLs are "/"-based.
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path = filepath.ToSlash(path)
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return fmt.Sprintf("file://%s", path)
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}
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// Make sure that we don't start with "/" since we add that below.
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if path[0] == '/' {
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path = path[1:]
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}
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return fmt.Sprintf("file:///%s", path)
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}
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