mirror of
https://github.com/denoland/deno.git
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81 lines
2.5 KiB
Rust
81 lines
2.5 KiB
Rust
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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use deno_core::JsRuntime;
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use deno_core::RuntimeOptions;
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use std::env;
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use std::path::Path;
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use std::path::PathBuf;
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// TODO(bartlomieju): this module contains a lot of duplicated
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// logic with `cli/build.rs`, factor out to `deno_core`.
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fn create_snapshot(
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mut js_runtime: JsRuntime,
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snapshot_path: &Path,
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files: Vec<PathBuf>,
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) {
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deno_web::init(&mut js_runtime);
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deno_fetch::init(&mut js_runtime);
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deno_crypto::init(&mut js_runtime);
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// TODO(nayeemrmn): https://github.com/rust-lang/cargo/issues/3946 to get the
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// workspace root.
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let display_root = Path::new(env!("CARGO_MANIFEST_DIR")).parent().unwrap();
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for file in files {
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println!("cargo:rerun-if-changed={}", file.display());
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let display_path = file.strip_prefix(display_root).unwrap();
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let display_path_str = display_path.display().to_string();
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js_runtime
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.execute(
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&("deno:".to_string() + &display_path_str.replace('\\', "/")),
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&std::fs::read_to_string(&file).unwrap(),
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)
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.unwrap();
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}
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let snapshot = js_runtime.snapshot();
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let snapshot_slice: &[u8] = &*snapshot;
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println!("Snapshot size: {}", snapshot_slice.len());
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std::fs::write(&snapshot_path, snapshot_slice).unwrap();
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println!("Snapshot written to: {} ", snapshot_path.display());
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}
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fn create_runtime_snapshot(snapshot_path: &Path, files: Vec<PathBuf>) {
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let js_runtime = JsRuntime::new(RuntimeOptions {
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will_snapshot: true,
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..Default::default()
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});
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create_snapshot(js_runtime, snapshot_path, files);
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}
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fn main() {
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// Skip building from docs.rs.
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if env::var_os("DOCS_RS").is_some() {
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return;
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}
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// To debug snapshot issues uncomment:
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// op_fetch_asset::trace_serializer();
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println!("cargo:rustc-env=TARGET={}", env::var("TARGET").unwrap());
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println!("cargo:rustc-env=PROFILE={}", env::var("PROFILE").unwrap());
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let o = PathBuf::from(env::var_os("OUT_DIR").unwrap());
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// Main snapshot
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let runtime_snapshot_path = o.join("CLI_SNAPSHOT.bin");
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let js_files = get_js_files("js");
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create_runtime_snapshot(&runtime_snapshot_path, js_files);
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}
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fn get_js_files(d: &str) -> Vec<PathBuf> {
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let manifest_dir = Path::new(env!("CARGO_MANIFEST_DIR"));
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let mut js_files = std::fs::read_dir(d)
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.unwrap()
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.map(|dir_entry| {
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let file = dir_entry.unwrap();
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manifest_dir.join(file.path())
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})
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.filter(|path| path.extension().unwrap_or_default() == "js")
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.collect::<Vec<PathBuf>>();
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js_files.sort();
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js_files
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}
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