paneru 0.5.2

A sliding, tiling window manager for MacOS.
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use std::fs;
use std::path::Path;

const DEFAULT_SDK: &str = "MacOSX.sdk";

use cfg_if::cfg_if;

macro_rules! lua_version_cfg_if {
    ( $( $feat:literal => $ver:literal ),+ $(,)? ) => {
        cfg_if! {
            $(
                if #[cfg(feature = $feat)] {
                    pub(crate) const LUA_VERSION: &'static str = $ver;
                } else
            )+
            {
                pub(crate) const LUA_VERSION: &'static str = "unknown";
            }
        }
    };
}

lua_version_cfg_if!(
    "lua54" => "Lua 5.4",
    "lua53" => "Lua 5.3",
    "lua55" => "Lua 5.5",
    "lua52" => "Lua 5.2",
    "luajit" => "LuaJIT",
);

fn main() {
    let sdk_dir = std::env::var("DEVELOPER_DIR").map_or_else(
        |_| "/Library/Developer/CommandLineTools/SDKs".to_string(),
        |x| format!("{x}/Platforms/MacOSX.platform/Developer/SDKs"),
    );

    let sdk_bases: Vec<String> = std::iter::once(format!("{sdk_dir}/{DEFAULT_SDK}"))
        .chain(
            fs::read_dir(&sdk_dir)
                .expect("Failed to read SDK directory")
                .flatten()
                .filter_map(|entry| entry.file_name().to_str().map(String::from))
                // macOS's default filesystem is case-insensitive, so the on-disk
                // spelling of the extension is not guaranteed to be lowercase.
                .filter(|name| {
                    name.starts_with("MacOSX")
                        && Path::new(name)
                            .extension()
                            .is_some_and(|ext| ext.eq_ignore_ascii_case("sdk"))
                        && name != DEFAULT_SDK
                })
                .map(|name| format!("{sdk_dir}/{name}")),
        )
        .collect();

    for base in &sdk_bases {
        let private = format!("{base}/System/Library/PrivateFrameworks");
        let hit =
            format!("{base}/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks");

        if Path::new(&private).exists() {
            println!("cargo:rustc-link-search=framework={private}");
        }
        if Path::new(&hit).exists() {
            println!("cargo:rustc-link-search=framework={hit}");
        }
    }

    if cfg!(feature = "lua") || cfg!(feature = "module") {
        println!("cargo:rustc-env=PANERU_LUA_VERSION={LUA_VERSION}");
    }

    if std::env::var("CARGO_CFG_TARGET_OS").as_deref() == Ok("macos") {
        println!("cargo:rustc-cdylib-link-arg=-undefined");
        println!("cargo:rustc-cdylib-link-arg=dynamic_lookup");
    }
}