py: Implement very simple frozen modules support.

Only modules (not packages) supported now. Source modules can be converted
to frozen module structures using tools/make-frozen.py script.

1 files changed, 50 insertions, 0 deletions

diff --git a/tools/make-frozen.py b/tools/make-frozen.py
new file mode 100755
index 0000000000..b053afa08e
--- /dev/null
+++ b/tools/make-frozen.py
@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+#
+# Create frozen modules structure for MicroPython.
+#
+# Usage:
+#
+# Have a directory with modules to be frozen (only modules, not packages
+# supported so far):
+#
+# frozen/foo.py
+# frozen/bar.py
+#
+# Run script, passing path to the directory above:
+#
+# ./make-frozen.py frozen > frozen.c
+#
+# Include frozen.c in your build, having defined MICROPY_MODULE_FROZEN in
+# config.
+#
+import sys
+import os
+
+
+def module_name(f):
+    return f[:-len(".py")]
+
+modules = []
+
+for dirpath, dirnames, filenames in os.walk(sys.argv[1]):
+    for f in filenames:
+        st = os.stat(dirpath + "/" + f)
+        modules.append((f, st))
+
+print("#include <stdint.h>")
+print("const uint16_t mp_frozen_sizes[] = {")
+
+for f, st in modules:
+    print("%d," % st.st_size)
+
+print("0};")
+
+print("const char mp_frozen_content[] = {")
+for f, st in modules:
+    m = module_name(f)
+    print('"%s\\0"' % m)
+    data = open(sys.argv[1] + "/" + f).read()
+    data = repr(data)[1:-1]
+    data = data.replace('"', '\\"')
+    print('"%s"' % data)
+print("};")