mirror of https://github.com/restic/restic.git
71 lines
1.6 KiB
Go
71 lines
1.6 KiB
Go
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package fstestutil
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import (
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"fmt"
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"io/ioutil"
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"os"
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)
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// FileInfoCheck is a function that validates an os.FileInfo according
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// to some criteria.
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type FileInfoCheck func(fi os.FileInfo) error
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type checkDirError struct {
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missing map[string]struct{}
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extra map[string]os.FileMode
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}
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func (e *checkDirError) Error() string {
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return fmt.Sprintf("wrong directory contents: missing %v, extra %v", e.missing, e.extra)
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}
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// CheckDir checks the contents of the directory at path, making sure
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// every directory entry listed in want is present. If the check is
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// not nil, it must also pass.
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//
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// If want contains the impossible filename "", unexpected files are
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// checked with that. If the key is not in want, unexpected files are
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// an error.
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//
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// Missing entries, that are listed in want but not seen, are an
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// error.
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func CheckDir(path string, want map[string]FileInfoCheck) error {
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problems := &checkDirError{
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missing: make(map[string]struct{}, len(want)),
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extra: make(map[string]os.FileMode),
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}
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for k := range want {
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if k == "" {
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continue
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}
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problems.missing[k] = struct{}{}
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}
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fis, err := ioutil.ReadDir(path)
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if err != nil {
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return fmt.Errorf("cannot read directory: %v", err)
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}
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for _, fi := range fis {
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check, ok := want[fi.Name()]
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if !ok {
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check, ok = want[""]
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}
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if !ok {
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problems.extra[fi.Name()] = fi.Mode()
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continue
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}
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delete(problems.missing, fi.Name())
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if check != nil {
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if err := check(fi); err != nil {
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return fmt.Errorf("check failed: %v: %v", fi.Name(), err)
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}
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}
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}
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if len(problems.missing) > 0 || len(problems.extra) > 0 {
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return problems
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}
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return nil
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}
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