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use std::env;
use std::path::Path;
use std::process::Command;
fn main() {
// Rebuild the embedded web UI (Leptos + Trunk) when the `server` feature is
// enabled. Set SKIP_TRUNK=true to skip (e.g. when assets are prebuilt).
if cfg!(feature = "server") && env::var("SKIP_TRUNK").unwrap_or_default() != "true" {
// `frontend` is a package in its own right, and cargo leaves nested
// packages out of the tarball it publishes, so it is simply absent when
// building from crates.io. Check for it before shelling out: `Command`
// reports a missing working directory exactly as it reports a missing
// binary, so without this the failure below blames trunk and sends
// people off to install one they already have.
assert!(
Path::new("frontend").exists(),
"the `server` feature builds the web UI from `frontend/`, which is \
not part of the published crate. Build from a git checkout of \
https://github.com/alucryd/oxyromon, or set SKIP_TRUNK=true if \
`target/assets` already holds a built UI."
);
let status = Command::new("trunk")
.arg("build")
.arg("--release")
.current_dir("frontend")
.status()
.expect(
"failed to run `trunk build`; install trunk (https://trunkrs.dev), \
or set SKIP_TRUNK=true",
);
assert!(status.success(), "`trunk build` failed");
}
// rust-embed needs the folder to exist at compile time even when no UI was
// built (e.g. building the published crate, where `frontend/` is absent):
// an empty folder still yields a working binary, just with an empty UI.
let _ = std::fs::create_dir_all(Path::new("target").join("assets"));
println!("cargo:rerun-if-changed=frontend/src");
println!("cargo:rerun-if-changed=frontend/index.html");
println!("cargo:rerun-if-changed=frontend/styles.css");
println!("cargo:rerun-if-changed=frontend/Trunk.toml");
println!("cargo:rerun-if-changed=frontend/Cargo.toml");
}