Clarify repo name regex intention

davidwarshaw · davidwarshaw · commit 32c77af6ac94 · 2020-07-20T11:20:59.000-04:00
Add context to comment to explain the repo name regex in addition to describing it.

Signed-off-by: David Warshaw &lt;david.warshaw@gmail.com&gt;
diff --git a/reference/regexp.go b/reference/regexp.go
@@ -9,7 +9,11 @@ var (
 
 	// separatorRegexp defines the separators allowed to be embedded in name
 	// components. This allow one period, one or two underscore and multiple
-	// dashes.
+	// dashes. Repeated dashes and underscores are intentionally treated
+	// differently. In order to support valid hostnames as name components,
+	// supporting repeated dash was added. Additionally double underscore is
+	// now allowed as a separator to loosen the restriction for previously
+	// supported names.
 	separatorRegexp = match(`(?:[._]|__|[-]*)`)
 
 	// nameComponentRegexp restricts registry path component names to start
