Sort output of --print-runtime-available by priority

execjs/__init__.py

@@ -38,7 +38,6 @@
 register = execjs._runtimes.register
 get = execjs._runtimes.get
 runtimes = execjs._runtimes.runtimes
-available_runtimes = execjs._runtimes.available_runtimes
 get_from_environment = execjs._runtimes.get_from_environment
 
 

execjs/__main__.py

@@ -19,11 +19,8 @@ def __init__(self, option_strings, dest=SUPPRESS, default=SUPPRESS, help=None):
         )
 
     def __call__(self, parser, namespace, values, option_string=None):
-        buffer = io.StringIO()
-        for name, runtime in sorted(execjs.runtimes().items()):
-            if runtime.is_available():
-                buffer.write(name + "\n")
-        parser.exit(message=buffer.getvalue())
+        message = "".join(name + "\n" for name, runtime in execjs.runtimes().items() if runtime.is_available())
+        parser.exit(message=message)
 
 
 def main():

execjs/_runtimes.py

@@ -1,4 +1,5 @@
 import os.path
+from collections import OrderedDict
 
 import execjs.runtime_names as runtime_names
 import execjs._external_runtime as external_runtime
@@ -23,12 +24,7 @@ def get(name=None):
 
 def runtimes():
     """return a dictionary of all supported JavaScript runtimes."""
-    return dict(_runtimes)
-
-
-def available_runtimes():
-    """return a dictionary of all supported JavaScript runtimes which is usable"""
-    return dict((name, runtime) for name, runtime in _runtimes if runtime.is_available())
+    return OrderedDict(_runtimes)
 
 
 def get_from_environment():

test_execjs.py

@@ -92,7 +92,9 @@ def setUp(self):
         self.runtime = execjs
 
 
-for name, runtime in execjs.available_runtimes().items():
+for name, runtime in execjs.runtimes().items():
+    if not runtime.is_available():
+        continue
     class_name = name.capitalize() + "RuntimeTest"
 
     def f(runtime=runtime):