Implement Match methods on tar, rar, and zip formats; port tests

mholt · Nov 7, 2018 · 48dff64 · 48dff64
1 parent fea250a
commit 48dff64
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diff --git a/archiver/archive_test.go b/archiver/archive_test.go
diff --git a/archiver/archive.go → archiver/archiver.go b/archiver/archive.go → archiver/archiver.go
@@ -113,6 +113,14 @@ type Decompressor interface {
 	Decompress(in io.Reader, out io.Writer) error
 }
 
+// Matcher is a type that can return whether the given
+// file appears to match the implementation's format.
+// Implementations should return the file's read position
+// to where it was when the method was called.
+type Matcher interface {
+	Match(*os.File) (bool, error)
+}
+
 func fileExists(name string) bool {
 	_, err := os.Stat(name)
 	return !os.IsNotExist(err)