Fixes parsing of URIs that begin with '//'.

lib/pure/uri.nim

@@ -104,19 +104,23 @@ proc parseUri*(uri: string, result: var Uri) =
   var i = 0
 
   # Check if this is a reference URI (relative URI)
+  let doubleSlash = uri.len > 1 and uri[1] == '/'
   if uri[i] == '/':
-    parsePath(uri, i, result)
-    return
+    # Make sure ``uri`` doesn't begin with '//'.
+    if not doubleSlash:
+      parsePath(uri, i, result)
+      return
 
   # Scheme
   i.inc parseWhile(uri, result.scheme, Letters + Digits + {'+', '-', '.'}, i)
-  if uri[i] != ':':
+  if uri[i] != ':' and not doubleSlash:
     # Assume this is a reference URI (relative URI)
     i = 0
     result.scheme.setLen(0)
     parsePath(uri, i, result)
     return
-  i.inc # Skip ':'
+  if not doubleSlash:
+    i.inc # Skip ':'
 
   # Authority
   if uri[i] == '/' and uri[i+1] == '/':
@@ -369,6 +373,15 @@ when isMainModule:
     doAssert test.path == "test/no/slash"
     doAssert($test == str)
 
+  block:
+    let str = "//git@github.com:dom96/packages"
+    let test = parseUri(str)
+    doAssert test.scheme == ""
+    doAssert test.username == "git"
+    doAssert test.hostname == "github.com"
+    doAssert test.port == "dom96"
+    doAssert test.path == "/packages"
+
   # Remove dot segments tests
   block:
     doAssert removeDotSegments("/foo/bar/baz") == "/foo/bar/baz"