replace once_cell with std equivalents

Author: FalkWoldmann

Cargo.lock

@@ -30,7 +30,6 @@ clap = { version = "4.5.31", features = ["derive"] } # parse CLI arguments
 clap-cargo = { version = "0.15.2", features = ["cargo_metadata"] }
 dirs = "6.0.0" # common directories
 indicatif = "0.17.11" # UI
-once_cell = "1.20.3" # lazy data structures and thunking
 owo-colors = "4.1.0" # color support for the terminal
 petgraph = "0.7.1" # graph data structures
 rust-releases = { version = "0.29.0", default-features = false, features = ["rust-changelog"] } # get the available rust versions

Cargo.toml

@@ -121,16 +121,16 @@ impl RustupCommand {
 
         Ok(RustupOutput {
             output,
-            stdout: once_cell::sync::OnceCell::new(),
-            stderr: once_cell::sync::OnceCell::new(),
+            stdout: std::cell::OnceCell::new(),
+            stderr: std::cell::OnceCell::new(),
         })
     }
 }
 
 pub struct RustupOutput {
     output: std::process::Output,
-    stdout: once_cell::sync::OnceCell<String>,
-    stderr: once_cell::sync::OnceCell<String>,
+    stdout: std::cell::OnceCell<String>,
+    stderr: std::cell::OnceCell<String>,
 }
 
 impl RustupOutput {

src/external_command/rustup_command.rs

@@ -1,8 +1,8 @@
-use once_cell::sync::OnceCell;
+use std::sync::OnceLock;
 use tabled::settings::{Margin, Style};
 use tabled::{Table, Tabled};
 
-static TERM_WIDTH: OnceCell<usize> = OnceCell::new();
+static TERM_WIDTH: OnceLock<usize> = OnceLock::new();
 
 static TABLE_CORRECTION: usize = 4;
 

src/reporter/formatting.rs

@@ -1,5 +1,5 @@
-use once_cell::sync::OnceCell;
 use rust_releases::semver;
+use std::cell::OnceCell;
 
 #[derive(Debug, Clone, Eq, PartialEq, serde::Serialize)]
 #[serde(rename_all = "snake_case")]