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https://github.com/denoland/deno.git
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72fe9bb470
This commit renames "deno_core::InternalModuleLoader" to "ExtModuleLoader" and changes the specifiers used by the modules loaded from this loader to "ext:". "internal:" scheme was really ambiguous and it's more characters than "ext:", which should result in slightly smaller snapshot size. Closes https://github.com/denoland/deno/issues/18020
111 lines
3.1 KiB
Rust
111 lines
3.1 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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use std::path::Path;
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use std::path::PathBuf;
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use std::time::Instant;
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use crate::ExtModuleLoaderCb;
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use crate::Extension;
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use crate::JsRuntime;
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use crate::RuntimeOptions;
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use crate::Snapshot;
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pub type CompressionCb = dyn Fn(&mut Vec<u8>, &[u8]);
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pub struct CreateSnapshotOptions {
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pub cargo_manifest_dir: &'static str,
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pub snapshot_path: PathBuf,
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pub startup_snapshot: Option<Snapshot>,
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pub extensions: Vec<Extension>,
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pub extensions_with_js: Vec<Extension>,
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pub compression_cb: Option<Box<CompressionCb>>,
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pub snapshot_module_load_cb: Option<ExtModuleLoaderCb>,
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}
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pub fn create_snapshot(create_snapshot_options: CreateSnapshotOptions) {
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let mut mark = Instant::now();
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let js_runtime = JsRuntime::new(RuntimeOptions {
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will_snapshot: true,
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startup_snapshot: create_snapshot_options.startup_snapshot,
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extensions: create_snapshot_options.extensions,
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extensions_with_js: create_snapshot_options.extensions_with_js,
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snapshot_module_load_cb: create_snapshot_options.snapshot_module_load_cb,
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..Default::default()
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});
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println!(
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"JsRuntime for snapshot prepared, took {:#?} ({})",
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Instant::now().saturating_duration_since(mark),
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create_snapshot_options.snapshot_path.display()
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);
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mark = Instant::now();
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let snapshot = js_runtime.snapshot();
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let snapshot_slice: &[u8] = &snapshot;
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println!(
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"Snapshot size: {}, took {:#?} ({})",
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snapshot_slice.len(),
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Instant::now().saturating_duration_since(mark),
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create_snapshot_options.snapshot_path.display()
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);
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mark = Instant::now();
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let maybe_compressed_snapshot: Box<dyn AsRef<[u8]>> =
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if let Some(compression_cb) = create_snapshot_options.compression_cb {
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let mut vec = vec![];
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vec.extend_from_slice(
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&u32::try_from(snapshot.len())
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.expect("snapshot larger than 4gb")
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.to_le_bytes(),
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);
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(compression_cb)(&mut vec, snapshot_slice);
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println!(
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"Snapshot compressed size: {}, took {:#?} ({})",
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vec.len(),
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Instant::now().saturating_duration_since(mark),
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create_snapshot_options.snapshot_path.display()
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);
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mark = std::time::Instant::now();
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Box::new(vec)
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} else {
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Box::new(snapshot_slice)
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};
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std::fs::write(
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&create_snapshot_options.snapshot_path,
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&*maybe_compressed_snapshot,
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)
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.unwrap();
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println!(
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"Snapshot written, took: {:#?} ({})",
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Instant::now().saturating_duration_since(mark),
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create_snapshot_options.snapshot_path.display(),
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);
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}
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pub type FilterFn = Box<dyn Fn(&PathBuf) -> bool>;
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pub fn get_js_files(
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cargo_manifest_dir: &'static str,
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directory: &str,
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filter: Option<FilterFn>,
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) -> Vec<PathBuf> {
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let manifest_dir = Path::new(cargo_manifest_dir);
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let mut js_files = std::fs::read_dir(directory)
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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| {
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path.extension().unwrap_or_default() == "js"
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&& filter.as_ref().map(|filter| filter(path)).unwrap_or(true)
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})
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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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