Fix hardcoded 'python' call and use python_cmd var instead

Also bump version to 1.2.2

Author: screamerbg

mbed/mbed.py

@@ -37,7 +37,7 @@
 
 
 # Application version
-ver = '1.2.1'
+ver = '1.2.2'
 
 # Default paths to Mercurial and Git
 hg_cmd = 'hg'
@@ -2192,7 +2192,7 @@ def compile_(toolchain=None, target=None, profile=False, compile_library=False,
         source = [os.path.relpath(program.path, orig_path)]
 
     if supported:
-        popen(['python', '-u', os.path.join(tools_dir, 'make.py')]
+        popen([python_cmd, '-u', os.path.join(tools_dir, 'make.py')]
               + (['-S', supported] if supported else []) + (['-v'] if very_verbose else [])
               + (['--app-config', app_config] if app_config else [])
               + args,
@@ -2404,7 +2404,7 @@ def export(ide=None, target=None, source=False, clean=False, supported=False, ap
     env = program.get_env()
 
     if supported:
-        popen(['python', '-u', os.path.join(tools_dir, 'project.py')]
+        popen([python_cmd, '-u', os.path.join(tools_dir, 'project.py')]
               + (['-S', supported] if supported else []) + (['-v'] if very_verbose else []),
               env=env)
         return

setup.py

@@ -18,7 +18,7 @@
 
 setup(
     name="mbed-cli",
-    version="1.2.1",
+    version="1.2.2",
     description="ARM mbed command line tool for repositories version control, publishing and updating code from remotely hosted repositories (GitHub, GitLab and mbed.org), and invoking mbed OS own build system and export functions, among other operations",
     long_description=LONG_DESC,
     url='http://github.com/ARMmbed/mbed-cli',