refactor: Replace once_cell to std lib (#1402)

.github/workflows/ci.yml

@@ -32,6 +32,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: dtolnay/rust-toolchain@1.67.0
+      - uses: dtolnay/rust-toolchain@1.70.0
       - uses: Swatinem/rust-cache@v2
       - run: cargo check --workspace

Cargo.toml

@@ -4,7 +4,7 @@ default-members = ["cli"]
 
 [workspace.package]
 version = "0.4.0"
-rust-version = "1.67"
+rust-version = "1.70" # also change in ci.yml
 authors = ["The Typst Project Developers"]
 edition = "2021"
 homepage = "https://typst.app"

cli/src/main.rs

@@ -18,9 +18,9 @@ use comemo::Prehashed;
 use elsa::FrozenVec;
 use memmap2::Mmap;
 use notify::{RecommendedWatcher, RecursiveMode, Watcher};
-use once_cell::unsync::OnceCell;
 use same_file::{is_same_file, Handle};
 use siphasher::sip128::{Hasher128, SipHasher13};
+use std::cell::OnceCell;
 use termcolor::{ColorChoice, StandardStream, WriteColor};
 use typst::diag::{FileError, FileResult, SourceError, StrResult};
 use typst::doc::Document;

src/eval/library.rs

@@ -4,7 +4,7 @@ use std::num::NonZeroUsize;
 
 use comemo::Tracked;
 use ecow::EcoString;
-use once_cell::sync::OnceCell;
+use std::sync::OnceLock;
 
 use super::{Args, Dynamic, Module, Value, Vm};
 use crate::diag::SourceResult;
@@ -158,7 +158,7 @@ impl Hash for LangItems {
 
 /// Global storage for lang items.
 #[doc(hidden)]
-pub static LANG_ITEMS: OnceCell<LangItems> = OnceCell::new();
+pub static LANG_ITEMS: OnceLock<LangItems> = OnceLock::new();
 
 /// Set the lang items.
 ///

tests/src/tests.rs

@@ -13,9 +13,9 @@ use std::{env, io};
 use clap::Parser;
 use comemo::{Prehashed, Track};
 use elsa::FrozenVec;
-use once_cell::unsync::OnceCell;
 use oxipng::{InFile, Options, OutFile};
 use rayon::iter::{ParallelBridge, ParallelIterator};
+use std::cell::OnceCell;
 use tiny_skia as sk;
 use unscanny::Scanner;
 use walkdir::WalkDir;