feat(vim.uri): Allow URI schemes other than file: without authority

runtime/lua/vim/uri.lua

@@ -74,7 +74,7 @@ local function uri_from_fname(path)
   return table.concat(uri_parts)
 end
 
-local URI_SCHEME_PATTERN = '^([a-zA-Z]+[a-zA-Z0-9+-.]*):/+.*'
+local URI_SCHEME_PATTERN = '^([a-zA-Z]+[a-zA-Z0-9+-.]*):.*'
 
 --- Get a URI from a bufnr
 --@param bufnr (number): Buffer number

test/functional/lua/uri_spec.lua

@@ -140,6 +140,12 @@ describe('URI methods', function()
           return vim.uri_to_fname('JDT://content/%5C/')
         ]])
       end)
+
+      it('uri_to_fname returns non-file scheme URI without authority unchanged', function()
+        eq('zipfile:/path/to/archive.zip%3A%3Afilename.txt', exec_lua [[
+          return vim.uri_to_fname('zipfile:/path/to/archive.zip%3A%3Afilename.txt')
+        ]])
+      end)
     end)
 
     describe('decode URI without scheme', function()
@@ -161,5 +167,14 @@ describe('URI methods', function()
       ]], uri)
       eq(uri, exec_lua(test_case))
     end)
+
+    it('uri_to_bufnr & uri_from_bufnr returns original uri for non-file uris without authority', function()
+      local uri = 'zipfile:/path/to/archive.zip%3A%3Afilename.txt'
+      local test_case = string.format([[
+        local uri = '%s'
+        return vim.uri_from_bufnr(vim.uri_to_bufnr(uri))
+      ]], uri)
+      eq(uri, exec_lua(test_case))
+    end)
   end)
 end)