ev: add script ensuring standard files across subprojects

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

dev/ensure-standard-files.zig

@@ -0,0 +1,28 @@
+//! Usage: zig run ./dev/ensure-standard-files.zig
+
+const std = @import("std");
+
+const dirs = [_][]const u8{
+    ".",
+    "basisu",
+    "ecs",
+    "freetype",
+    "gamemode",
+    "glfw",
+    "gpu",
+    "gpu-dawn",
+    "sysaudio",
+    "sysjs",
+};
+
+pub fn main() !void {
+    inline for (dirs) |dir| {
+        copyFile("dev/template/LICENSE", dir ++ "/LICENSE");
+        copyFile("dev/template/LICENSE-MIT", dir ++ "/LICENSE-MIT");
+        copyFile("dev/template/LICENSE-APACHE", dir ++ "/LICENSE-APACHE");
+    }
+}
+
+pub fn copyFile(src_path: []const u8, dst_path: []const u8) void {
+    std.fs.cwd().copyFile(src_path, std.fs.cwd(), dst_path, .{}) catch unreachable;
+}