| package source |
| |
| import ( |
| "fmt" |
| "io/ioutil" |
| "os" |
| "strings" |
| ) |
| |
| type LocalSource struct { |
| root string |
| } |
| |
| func NewLocal(root string) Source { |
| return &LocalSource{ |
| root: strings.TrimRight(root, "/"), |
| } |
| } |
| |
| func (s *LocalSource) resolve(path string) (string, error) { |
| if !strings.HasPrefix(path, "//") { |
| return "", fmt.Errorf("invalid path %q, expected // prefix", path) |
| } |
| path = path[2:] |
| if strings.HasPrefix(path, "/") { |
| return "", fmt.Errorf("invalid path %q, expected // prefix", path) |
| } |
| |
| return s.root + "/" + path, nil |
| } |
| |
| func (s *LocalSource) IsFile(path string) (bool, error) { |
| path, err := s.resolve(path) |
| if err != nil { |
| return false, err |
| } |
| stat, err := os.Stat(path) |
| if err != nil { |
| if os.IsNotExist(err) { |
| return false, nil |
| } |
| return false, fmt.Errorf("os.Stat(%q): %w", path, err) |
| } |
| return !stat.IsDir(), nil |
| } |
| |
| func (s *LocalSource) ReadFile(path string) ([]byte, error) { |
| path, err := s.resolve(path) |
| if err != nil { |
| return nil, err |
| } |
| // TODO(q3k): limit size |
| return ioutil.ReadFile(path) |
| } |
| |
| func (s *LocalSource) IsDirectory(path string) (bool, error) { |
| path, err := s.resolve(path) |
| if err != nil { |
| return false, err |
| } |
| stat, err := os.Stat(path) |
| if err != nil { |
| if os.IsNotExist(err) { |
| return false, nil |
| } |
| return false, fmt.Errorf("os.Stat(%q): %w", path, err) |
| } |
| return stat.IsDir(), nil |
| } |
| |
| func (s *LocalSource) CacheSet(dependencies []string, key string, value interface{}) { |
| // Swallow writes. The local filesystem can always change underneath us and |
| // we're not tracking anything, so we cannot ever keep caches. |
| } |
| |
| func (s *LocalSource) CacheGet(key string) interface{} { |
| return nil |
| } |