add some code

managed_components/lvgl__lvgl/docs/config_builder.py

@@ -0,0 +1,74 @@
+"""
+Create lv_conf.h in same directory as this file
+from ../lv_conf_template.h that has:
+
+1.  all its #define LV_USE... 0-or-1 options set to 1
+     (except for LV_USER_PROFILER),
+2.  all its #define LV_FONT... 0-or-1 options set to 1,
+3.  its #if 0 directive set to #if 1.
+"""
+import os
+import sys
+import re
+
+base_path = os.path.dirname(__file__)
+dst_config = os.path.join(base_path, 'lv_conf.h')
+src_config = os.path.abspath(os.path.join(
+    base_path,
+    '..',
+    'lv_conf_template.h'
+))
+disabled_option_re = re.compile(r'^\s*#define\s+\w+\s+(\b0\b)')
+
+
+def run(c_path=None):
+    global dst_config
+    os.chdir(base_path)
+
+    if c_path is not None:
+        dst_config = c_path
+
+    with open(src_config, 'r') as f:
+        data = f.read()
+
+    lines = data.split('\n')
+
+    for i, line in enumerate(lines):
+        if 'LV_USE_PROFILER' in line:
+            continue
+
+        # These 2 fonts have been deprecated in favor of
+        # LV_FONT_SOURCE_HAN_SANS_SC_14_CJK and
+        # LV_FONT_SOURCE_HAN_SANS_SC_16_CJK.
+        if 'LV_FONT_SIMSUN_14_CJK' in line:
+            continue
+
+        if 'LV_FONT_SIMSUN_16_CJK' in line:
+            continue
+
+        if 'LV_USE' in line or ('LV_FONT' in line and '#define' in line):
+            match = disabled_option_re.search(line)
+            if match:
+                # Replace '0' with '1' without altering any other part of line.
+                # Set `j` to index where '0' was found.
+                j = match.regs[1][0]
+                # Surgically insert '1' in place of '0'.
+                lines[i] = line[:j] + '1' + line[j + 1:]
+        elif line.startswith('#if 0'):
+            line = line.replace('#if 0', '#if 1')
+            lines[i] = line
+
+    data = '\n'.join(lines)
+
+    with open(dst_config, 'w') as f:
+        f.write(data)
+
+
+def cleanup():
+    if os.path.exists(dst_config):
+        os.remove(dst_config)
+
+
+if __name__ == '__main__':
+    """Make module importable as well as run-able."""
+    run()