Added Lua recipe.

recipes/lua/recipe.py

@@ -0,0 +1,49 @@
+
+
+
+import json
+import os
+import re
+import requests
+from SCons.Script import *
+
+_VERSIONS_URL = 'https://www.lua.org/ftp/'
+_VERSION_PATTERN = re.compile(r'HREF="lua-([0-9]+)\.([0-9]+)\.([0-9]+)\.tar\.gz"')
+
+def versions(env: Environment, update: bool = False):
+    versions_file = os.path.join(env['DOWNLOAD_DIR'], 'lua_versions.json')
+    if update or not os.path.exists(versions_file):
+        req = requests.get(_VERSIONS_URL)
+        result = []
+        for match in _VERSION_PATTERN.finditer(req.text):
+            result.append((int(match.groups()[0]), int(match.groups()[1]), int(match.groups()[2])))
+        with open(versions_file, 'w') as f:
+            json.dump(result, f)
+        return result
+    else:
+        try:
+            with open(versions_file, 'r') as f:
+                return [tuple(v) for v in json.load(f)]
+        except:
+            print('lua_versions.json is empty or broken, redownloading.')
+            return versions(env, update=True)
+
+def dependencies(env: Environment, version) -> 'dict':
+    return {}
+
+def cook(env: Environment, version) -> dict:
+    url = f'https://www.lua.org/ftp/lua-{version[0]}.{version[1]}.{version[2]}.tar.gz'
+    repo = env.DownloadAndExtract(f'lua_{version[0]}.{version[1]}.{version[2]}', url = url, skip_folders = 1)
+    checkout_root = repo['extracted_root']
+    src_folder = os.path.join(checkout_root, 'src')
+    lua_source_files = [f for f in env.RGlob(src_folder, '*.c') if f.name != 'lua.c']
+    lib_lua = env.StaticLibrary(
+        CCFLAGS = env['CCFLAGS'] + ['-Wno-pedantic'], # Lua uses a GNU extension for taking addresses of labels
+        target = env['LIB_DIR'] + '/lua_full',
+        source = lua_source_files
+    )
+    
+    return {
+        'CPPPATH': src_folder,
+        'LIBS': [lib_lua]
+    }