py: Add sys.implementation, containing uPy name and version number.

Uses attrtuple if it's enabled, otherwise just a normal tuple.

py/modsys.c

@@ -35,6 +35,8 @@
 
 #if MICROPY_PY_SYS
 
+#include "genhdr/py-version.h"
+
 /// \module sys - system specific functions
 
 // defined per port; type of these is irrelevant, just need pointer
@@ -53,6 +55,34 @@ STATIC const MP_DEFINE_STR_OBJ(version_obj, "3.4.0");
 #define I(n) MP_OBJ_NEW_SMALL_INT(n)
 // TODO: CPython is now at 5-element array, but save 2 els so far...
 STATIC const mp_obj_tuple_t mp_sys_version_info_obj = {{&mp_type_tuple}, 3, {I(3), I(4), I(0)}};
+
+// sys.implementation object
+// this holds the MicroPython version
+STATIC const mp_obj_tuple_t mp_sys_implementation_version_info_obj = {
+    {&mp_type_tuple},
+    3,
+    { I(MICROPY_VERSION_MAJOR), I(MICROPY_VERSION_MINOR), I(MICROPY_VERSION_MICRO) }
+};
+#if MICROPY_PY_ATTRTUPLE
+STATIC const qstr impl_fields[] = { MP_QSTR_name, MP_QSTR_version };
+STATIC MP_DEFINE_ATTRTUPLE(
+    mp_sys_implementation_obj,
+    impl_fields,
+    2,
+        MP_OBJ_NEW_QSTR(MP_QSTR_micropython),
+        (mp_obj_t)&mp_sys_implementation_version_info_obj
+);
+#else
+STATIC const mp_obj_tuple_t mp_sys_implementation_obj = {
+    {&mp_type_tuple},
+    2,
+    {
+        MP_OBJ_NEW_QSTR(MP_QSTR_micropython),
+        (mp_obj_t)&mp_sys_implementation_version_info_obj,
+    }
+};
+#endif
+
 #undef I
 
 #ifdef MICROPY_PY_SYS_PLATFORM
@@ -98,6 +128,7 @@ STATIC const mp_map_elem_t mp_module_sys_globals_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_argv), (mp_obj_t)&MP_STATE_VM(mp_sys_argv_obj) },
     { MP_OBJ_NEW_QSTR(MP_QSTR_version), (mp_obj_t)&version_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_version_info), (mp_obj_t)&mp_sys_version_info_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_implementation), (mp_obj_t)&mp_sys_implementation_obj },
 #ifdef MICROPY_PY_SYS_PLATFORM
     { MP_OBJ_NEW_QSTR(MP_QSTR_platform), (mp_obj_t)&platform_obj },
 #endif

py/py-version.sh

@@ -11,9 +11,28 @@ git diff-index --cached --quiet HEAD -- 2> /dev/null || git_files_are_clean=0
 if [ "${git_files_are_clean}" != "1" ]; then
     git_hash="${git_hash}-dirty"
 fi
+
+# Try to extract MicroPython version
+if echo ${git_tag} | grep -q '^v[0-9]'; then
+    ver=$(echo ${git_tag} | cut -b 2- | cut -d - -f 1)
+    ver_major=$(echo ${ver} | cut -d . -f 1)
+    ver_minor=$(echo ${ver} | cut -d . -f 2)
+    ver_micro=$(echo ${ver} | cut -d . -f 3)
+    if [ -z ${ver_micro} ]; then
+        ver_micro="0"
+    fi
+else
+    ver_major="0"
+    ver_minor="0"
+    ver_micro="1"
+fi
+
 cat <<EOF
 // This file was generated by py/py-version.sh
 #define MICROPY_GIT_TAG "${git_tag}"
 #define MICROPY_GIT_HASH "${git_hash}"
 #define MICROPY_BUILD_DATE "$(date '+%Y-%m-%d')"
+#define MICROPY_VERSION_MAJOR (${ver_major})
+#define MICROPY_VERSION_MINOR (${ver_minor})
+#define MICROPY_VERSION_MICRO (${ver_micro})
 EOF

py/qstrdefs.h

@@ -450,6 +450,10 @@ Q(stdout)
 Q(stderr)
 Q(version)
 Q(version_info)
+#if MICROPY_PY_ATTRTUPLE
+Q(name)
+#endif
+Q(implementation)
 #if MICROPY_PY_SYS_MAXSIZE
 Q(maxsize)
 #endif