attempt to build web version out of emscripten legacy gl wrapper

bin/twnbuild

@@ -7,45 +7,56 @@ from pathlib import Path
 from sys import argv
 import tomllib
 
+#TODO: support for default pack override
+#TODO: automatic full rebuild on git head change (such as new commits)
+
 has_ninja = getoutput("command -v ninja") != ""
 has_clang = getoutput("command -v clang") != ""
 
-#TODO: support for default pack override
+target_web = "--target=web" in argv
+
+#TODO: infer what "native" means for current env
+build_dir = "build/web" if target_web else "build/native"
+build_dir += "/release" if "--release" in argv else "/debug"
+
+cmake = ["emcmake", "cmake"] if target_web else ["cmake"]
+# cmake configuration command
+command = []
 
-cmake = ["cmake"]
 # check whether clang is around (it's just better)
 if has_clang:
-    cmake += ["-DCMAKE_C_COMPILER=clang"]
+    command += ["-DCMAKE_C_COMPILER=clang"]
 # check whether ninja is around (you better start running)
 if has_ninja:
-    cmake += ["-G", "Ninja"]
-cmake += ["-B", "build"]
+    command += ["-G", "Ninja"]
+
+command += ["-B", build_dir]
 
 # TODO: have it --fast=1 instead, where separate --debug=0 would mean stripping the debug info
 if "--release" in argv:
-    cmake += ["-DCMAKE_BUILD_TYPE=Release"]
+    command += ["-DCMAKE_BUILD_TYPE=Release"]
 elif "--debug" in argv:
-    cmake += ["-DCMAKE_BUILD_TYPE=Debug"]
+    command += ["-DCMAKE_BUILD_TYPE=Debug"]
 
 if "--unified=1" in argv:
-    cmake += ["-DTWN_FEATURE_DYNLIB_GAME=ON"]
+    command += ["-DTWN_FEATURE_DYNLIB_GAME=ON"]
 elif "--unified=0" in argv:
-    cmake += ["-DTWN_FEATURE_DYNLIB_GAME=OFF"]
+    command += ["-DTWN_FEATURE_DYNLIB_GAME=OFF"]
 
 if "--sanitize=1" in argv:
-    cmake += ["-DTWN_SANITIZE=ON"]
+    command += ["-DTWN_SANITIZE=ON"]
 elif "--sanitize=0" in argv:
-    cmake += ["-DTWN_SANITIZE=OFF"]
+    command += ["-DTWN_SANITIZE=OFF"]
 
-cmake += [f"-DTWN_OUT_DIR={getcwd()}"]
+command += [f"-DTWN_OUT_DIR={getcwd()}"]
 # pass arbitrary arguments over
 if "--" in argv:
-    cmake += argv[argv.index("--")+1:]
+    command += argv[argv.index("--")+1:]
 
 # if no root cmake file is present, infer it from `twn.toml:game.interpreter`
 if not Path("CMakeLists.txt").is_file():
     config = tomllib.loads(Path("data/twn.toml").read_text())
-    cmake += ["-S", expandvars(config["game"]["interpreter"])]
+    command += ["-S", expandvars(config["game"]["interpreter"])]
 
-run(cmake, check=True)
-run(["cmake", "--build", "build", "--parallel"], check=True)
+run(cmake + command, check=True)
+run(["cmake"] + ["--build", build_dir, "--parallel"], check=True)