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// Copyright 2018 the Deno authors. All rights reserved. MIT license.
// Run "cargo build -vv" if you want to see gn output.
#![deny(warnings)]
use std::env;
use std::path::{self, Path, PathBuf};
use std::process::Command;
fn main() {
let gn_mode = if cfg!(target_os = "windows") {
// On Windows, we need to link with a release build of libdeno, because
// rust always uses the release CRT.
// TODO(piscisaureus): make linking with debug libdeno possible.
String::from("release")
} else {
// Cargo sets PROFILE to either "debug" or "release", which conveniently
// matches the build modes we support.
env::var("PROFILE").unwrap()
};
let cwd = env::current_dir().unwrap();
let gn_out_path = cwd.join(format!("target/{}", gn_mode));
let gn_out_dir = normalize_path(&gn_out_path);
// Tell Cargo when to re-run this file. We do this first, so these directives
// can take effect even if something goes wrong later in the build process.
println!("cargo:rerun-if-env-changed=DENO_BUILD_PATH");
// TODO: this is obviously not appropriate here.
println!("cargo:rerun-if-env-changed=APPVEYOR_REPO_COMMIT");
// Detect if we're being invoked by the rust language server (RLS).
// Unfortunately we can't detect whether we're being run by `cargo check`.
let check_only = env::var_os("CARGO")
.map(PathBuf::from)
.as_ref()
.and_then(|p| p.file_stem())
.and_then(|f| f.to_str())
.map(|s| s.starts_with("rls"))
.unwrap_or(false);
// This helps Rust source files locate the snapshot, source map etc.
println!("cargo:rustc-env=GN_OUT_DIR={}", gn_out_dir);
let gn_target;
if check_only {
// When RLS is running "cargo check" to analyze the source code, we're not
// trying to build a working executable, rather we're just compiling all
// rust code. Therefore, make ninja build only 'msg_generated.rs'.
gn_target = "msg_rs";
// Enable the 'check_only' feature, which enables some workarounds in the
// rust source code to compile successfully without a bundle and snapshot
println!("cargo:rustc-cfg=feature=\"check-only\"");
} else {
// "Full" (non-RLS) build.
gn_target = "deno_deps";
// Link with libdeno.a/.lib, which includes V8.
println!("cargo:rustc-link-search=native={}/obj/libdeno", gn_out_dir);
if cfg!(target_os = "windows") {
println!("cargo:rustc-link-lib=static=libdeno");
} else {
println!("cargo:rustc-link-lib=static=deno");
}
// Link the system libraries that libdeno and V8 depend on.
if cfg!(any(target_os = "macos", target_os = "freebsd")) {
println!("cargo:rustc-link-lib=dylib=c++");
} else if cfg!(target_os = "windows") {
for lib in vec!["dbghelp", "shlwapi", "winmm", "ws2_32"] {
println!("cargo:rustc-link-lib={}", lib);
}
}
}
if !gn_out_path.join("build.ninja").exists() {
let status = Command::new("python")
.env("DENO_BUILD_PATH", &gn_out_dir)
.env("DENO_BUILD_MODE", &gn_mode)
.arg("./tools/setup.py")
.status()
.expect("setup.py failed");
assert!(status.success());
}
let status = Command::new("python")
.env("DENO_BUILD_PATH", &gn_out_dir)
.env("DENO_BUILD_MODE", &gn_mode)
.arg("./tools/build.py")
.arg(gn_target)
.arg("-v")
.status()
.expect("build.py failed");
assert!(status.success());
}
// Utility function to make a path absolute, normalizing it to use forward
// slashes only. The returned value is an owned String, otherwise panics.
fn normalize_path<T: AsRef<Path>>(path: T) -> String {
path
.as_ref()
.to_str()
.unwrap()
.to_owned()
.chars()
.map(|c| if path::is_separator(c) { '/' } else { c })
.collect()
}
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