[FL-2052] New build system based on scons (#1269)

site_scons/site_tools/fbt_apps.py

@@ -0,0 +1,61 @@
+from SCons.Builder import Builder
+from SCons.Action import Action
+
+import SCons
+from fbt.appmanifest import FlipperAppType, AppManager, ApplicationsCGenerator
+
+# Adding objects for application management to env
+#  AppManager env["APPMGR"] - loads all manifests; manages list of known apps
+#  AppBuildset env["APPBUILD"] - contains subset of apps, filtered for current config
+
+
+def LoadApplicationManifests(env):
+    appmgr = env["APPMGR"] = AppManager()
+    for entry in env.Glob("#/applications/*"):
+        if isinstance(entry, SCons.Node.FS.Dir) and not str(entry).startswith("."):
+            appmgr.load_manifest(entry.File("application.fam").abspath, entry.name)
+
+
+def PrepareApplicationsBuild(env):
+    env["APPBUILD"] = env["APPMGR"].filter_apps(env["APPS"])
+    env["APPBUILD_DUMP"] = env.Action(
+        DumpApplicationConfig,
+        "\tINFO\t",
+    )
+
+
+def DumpApplicationConfig(target, source, env):
+    print(f"Loaded {len(env['APPMGR'].known_apps)} app definitions.")
+    print("Firmware modules configuration:")
+    for apptype in FlipperAppType:
+        app_sublist = env["APPBUILD"].get_apps_of_type(apptype)
+        if app_sublist:
+            print(
+                f"{apptype.value}:\n\t",
+                ", ".join(app.appid for app in app_sublist),
+            )
+
+
+def build_apps_c(target, source, env):
+    target_file_name = target[0].path
+
+    gen = ApplicationsCGenerator(env["APPBUILD"])
+    with open(target_file_name, "w") as file:
+        file.write(gen.generate())
+
+
+def generate(env):
+    env.AddMethod(LoadApplicationManifests)
+    env.AddMethod(PrepareApplicationsBuild)
+
+    env.Append(
+        BUILDERS={
+            "ApplicationsC": Builder(
+                action=Action(build_apps_c, "${APPSCOMSTR}"),
+            ),
+        }
+    )
+
+
+def exists(env):
+    return True