Use the python used with test-module to run modules (#19591)

* Use ansible_python_interpreter to run modules

Use ansible_python_interpreter to run modules if
`-I ansible_python_interpreter` is set.

Remove unused default from `-I` help text.

* Update test-module to pep8 standards

hacking/test-module

@@ -29,7 +29,6 @@
 #    test-module -m ../library/file/lineinfile -a "dest=/etc/exports line='/srv/home hostname1(rw,sync)'" --check
 #    test-module -m ../library/commands/command -a "echo hello" -n -o "test_hello"
 
-import base64
 import optparse
 import os
 import subprocess
@@ -49,6 +48,7 @@ try:
 except ImportError:
     import simplejson as json
 
+
 def parse():
     """parse command line
 
@@ -65,8 +65,7 @@ def parse():
         help="path to python debugger (e.g. /usr/bin/pdb)")
     parser.add_option('-I', '--interpreter', dest='interpreter',
         help="path to interpreter to use for this module (e.g. ansible_python_interpreter=/usr/bin/python)",
-        metavar='INTERPRETER_TYPE=INTERPRETER_PATH',
-        default='python={0}'.format(sys.executable))
+        metavar='INTERPRETER_TYPE=INTERPRETER_PATH')
     parser.add_option('-c', '--check', dest='check', action='store_true',
         help="run the module in check mode")
     parser.add_option('-n', '--noexecute', dest='execute', action='store_false',
@@ -81,6 +80,7 @@ def parse():
     else:
         return options, args
 
+
 def write_argsfile(argstring, json=False):
     """ Write args to a file for old-style module's use. """
     argspath = os.path.expanduser("~/.ansible_test_module_arguments")
@@ -92,7 +92,23 @@ def write_argsfile(argstring, json=False):
     argsfile.close()
     return argspath
 
-def boilerplate_module(modfile, args, interpreter, check, destfile):
+
+def get_interpreters(interpreter):
+    result = dict()
+    if interpreter:
+        if '=' not in interpreter:
+            print("interpreter must by in the form of ansible_python_interpreter=/usr/bin/python")
+            sys.exit(1)
+        interpreter_type, interpreter_path = interpreter.split('=')
+        if not interpreter_type.startswith('ansible_'):
+            interpreter_type = 'ansible_%s' % interpreter_type
+        if not interpreter_type.endswith('_interpreter'):
+            interpreter_type = '%s_interpreter' % interpreter_type
+        result[interpreter_type] = interpreter_path
+    return result
+
+
+def boilerplate_module(modfile, args, interpreters, check, destfile):
     """ simulate what ansible does with new style modules """
 
     # module_fh = open(modfile)
@@ -122,17 +138,7 @@ def boilerplate_module(modfile, args, interpreter, check, destfile):
         parsed_args = parse_kv(args)
         complex_args = utils_vars.combine_vars(complex_args, parsed_args)
 
-    task_vars = {}
-    if interpreter:
-        if '=' not in interpreter:
-            print("interpreter must by in the form of ansible_python_interpreter=/usr/bin/python")
-            sys.exit(1)
-        interpreter_type, interpreter_path = interpreter.split('=')
-        if not interpreter_type.startswith('ansible_'):
-            interpreter_type = 'ansible_%s' % interpreter_type
-        if not interpreter_type.endswith('_interpreter'):
-            interpreter_type = '%s_interpreter' % interpreter_type
-        task_vars[interpreter_type] = interpreter_path
+    task_vars = interpreters
 
     if check:
         complex_args['_ansible_check_mode'] = True
@@ -160,10 +166,17 @@ def boilerplate_module(modfile, args, interpreter, check, destfile):
 
     return (modfile2_path, modname, module_style)
 
-def ansiballz_setup(modfile, modname):
+
+def ansiballz_setup(modfile, modname, interpreters):
     os.system("chmod +x %s" % modfile)
 
-    cmd = subprocess.Popen([modfile, 'explode'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    if 'ansible_python_interpreter' in interpreters:
+        command = [interpreters['ansible_python_interpreter']]
+    else:
+        command = []
+    command.extend([modfile, 'explode'])
+
+    cmd = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
     out, err = cmd.communicate()
     lines = out.splitlines()
     if len(lines) != 2 or 'Module expanded into' not in lines[0]:
@@ -179,16 +192,21 @@ def ansiballz_setup(modfile, modname):
     print("* ansiballz module detected; extracted module source to: %s" % debug_dir)
     return modfile, argsfile
 
-def runtest(modfile, argspath, modname, module_style):
+
+def runtest(modfile, argspath, modname, module_style, interpreters):
     """Test run a module, piping it's output for reporting."""
     if module_style == 'ansiballz':
-        modfile, argspath = ansiballz_setup(modfile, modname)
+        modfile, argspath = ansiballz_setup(modfile, modname, interpreters)
+        if 'ansible_python_interpreter' in interpreters:
+            invoke = "%s " % interpreters['ansible_python_interpreter']
+        else:
+            invoke = ""
 
     os.system("chmod +x %s" % modfile)
 
-    invoke = "%s" % (modfile)
+    invoke = "%s%s" % (invoke, modfile)
     if argspath is not None:
-        invoke = "%s %s" % (modfile, argspath)
+        invoke = "%s %s" % (invoke, argspath)
 
     cmd = subprocess.Popen(invoke, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
     (out, err) = cmd.communicate()
@@ -210,6 +228,7 @@ def runtest(modfile, argspath, modname, module_style):
     print("PARSED OUTPUT")
     print(jsonify(results,format=True))
 
+
 def rundebug(debugger, modfile, argspath, modname, module_style):
     """Run interactively with console debugger."""
 
@@ -221,10 +240,12 @@ def rundebug(debugger, modfile, argspath, modname, module_style):
     else:
         subprocess.call("%s %s" % (debugger, modfile), shell=True)
 
+
 def main():
 
     options, args = parse()
-    (modfile, modname, module_style) = boilerplate_module(options.module_path, options.module_args, options.interpreter, options.check, options.filename)
+    interpreters = get_interpreters(options.interpreter)
+    (modfile, modname, module_style) = boilerplate_module(options.module_path, options.module_args, interpreters, options.check, options.filename)
 
     argspath = None
     if module_style not in ('new', 'ansiballz'):
@@ -234,15 +255,15 @@ def main():
             argspath = write_argsfile(options.module_args, json=False)
         else:
             raise Exception("internal error, unexpected module style: %s" % module_style)
+
     if options.execute:
         if options.debugger:
             rundebug(options.debugger, modfile, argspath, modname, module_style)
         else:
-            runtest(modfile, argspath, modname, module_style)
+            runtest(modfile, argspath, modname, module_style, interpreters)
 
 if __name__ == "__main__":
     try:
         main()
     finally:
         shutil.rmtree(C.DEFAULT_LOCAL_TMP, True)
-