Migrate lazy_static to once_cell, less macro magic and slightly faster

Cargo.lock

@@ -131,7 +131,6 @@ dependencies = [
  "handlebars",
  "idna 0.2.0",
  "jsonwebtoken",
- "lazy_static",
  "lettre",
  "libsqlite3-sys",
  "log 0.4.8",
@@ -140,6 +139,7 @@ dependencies = [
  "num-derive",
  "num-traits",
  "oath",
+ "once_cell",
  "openssl",
  "percent-encoding 2.1.0",
  "quoted_printable",
@@ -702,11 +702,10 @@ dependencies = [
 
 [[package]]
 name = "fern"
-version = "0.5.9"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e69ab0d5aca163e388c3a49d284fed6c3d0810700e77c5ae2756a50ec1a4daaa"
+checksum = "8c9a4820f0ccc8a7afd67c39a0f1a0f4b07ca1725164271a64939d7aeb9af065"
 dependencies = [
- "chrono",
  "log 0.4.8",
  "syslog",
 ]
@@ -938,16 +937,16 @@ dependencies = [
 
 [[package]]
 name = "html5ever"
-version = "0.22.3"
+version = "0.22.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b04478cf718862650a0bf66acaf8f2f8c906fbc703f35c916c1f4211b069a364"
+checksum = "c213fa6a618dc1da552f54f85cba74b05d8e883c92ec4e89067736938084c26e"
 dependencies = [
  "log 0.4.8",
  "mac",
  "markup5ever",
- "proc-macro2 0.3.8",
- "quote 0.5.2",
- "syn 0.13.11",
+ "proc-macro2 0.4.30",
+ "quote 0.6.13",
+ "syn 0.15.44",
 ]
 
 [[package]]
@@ -1561,6 +1560,12 @@ dependencies = [
  "sha2",
 ]
 
+[[package]]
+name = "once_cell"
+version = "1.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1c601810575c99596d4afc46f78a678c80105117c379eb3650cf99b8a21ce5b"
+
 [[package]]
 name = "opaque-debug"
 version = "0.2.3"
@@ -1861,15 +1866,6 @@ dependencies = [
  "syn 1.0.16",
 ]
 
-[[package]]
-name = "proc-macro2"
-version = "0.3.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b06e2f335f48d24442b35a19df506a835fb3547bc3c06ef27340da9acf5cae7"
-dependencies = [
- "unicode-xid 0.1.0",
-]
-
 [[package]]
 name = "proc-macro2"
 version = "0.4.30"
@@ -1907,15 +1903,6 @@ version = "1.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a1d01941d82fa2ab50be1e79e6714289dd7cde78eba4c074bc5a4374f650dfe0"
 
-[[package]]
-name = "quote"
-version = "0.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9949cfe66888ffe1d53e6ec9d9f3b70714083854be20fd5e271b232a017401e8"
-dependencies = [
- "proc-macro2 0.3.8",
-]
-
 [[package]]
 name = "quote"
 version = "0.6.13"
@@ -2533,9 +2520,9 @@ checksum = "5c2fb2ec9bcd216a5b0d0ccf31ab17b5ed1d627960edff65bbe95d3ce221cefc"
 
 [[package]]
 name = "soup"
-version = "0.4.1"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "16eb6b0678654a57009598ed84610f2afa5fadb22f3815e9f23dc5eab1056031"
+checksum = "ee42b8c117ede655c8ffe18dafcd239b23eb3bb7a2c71b1f01237587736f139f"
 dependencies = [
  "html5ever",
  "regex",
@@ -2650,17 +2637,6 @@ version = "2.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7c65d530b10ccaeac294f349038a597e435b18fb456aadd0840a623f83b9e941"
 
-[[package]]
-name = "syn"
-version = "0.13.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "14f9bf6292f3a61d2c716723fdb789a41bbe104168e6f496dc6497e531ea1b9b"
-dependencies = [
- "proc-macro2 0.3.8",
- "quote 0.5.2",
- "unicode-xid 0.1.0",
-]
-
 [[package]]
 name = "syn"
 version = "0.15.44"

Cargo.toml

@@ -83,8 +83,8 @@ yubico = { version = "0.7.1", features = ["online-tokio"], default-features = fa
 # A `dotenv` implementation for Rust
 dotenv = { version = "0.15.0", default-features = false }
 
-# Lazy static macro
-lazy_static = "1.4.0"
+# Lazy initialization
+once_cell = "1.3.1"
 
 # More derives
 derive_more = "0.99.3"

src/api/admin.rs

@@ -1,3 +1,4 @@
+use once_cell::sync::Lazy;
 use serde_json::Value;
 use std::process::Command;
 
@@ -38,9 +39,8 @@ pub fn routes() -> Vec<Route> {
     ]
 }
 
-lazy_static! {
-    static ref CAN_BACKUP: bool = cfg!(feature = "sqlite") && Command::new("sqlite3").arg("-version").status().is_ok();
-}
+static CAN_BACKUP: Lazy<bool> =
+    Lazy::new(|| cfg!(feature = "sqlite") && Command::new("sqlite3").arg("-version").status().is_ok());
 
 #[get("/")]
 fn admin_disabled() -> &'static str {

src/api/core/two_factor/u2f.rs

@@ -1,3 +1,4 @@
+use once_cell::sync::Lazy;
 use rocket::Route;
 use rocket_contrib::json::Json;
 use serde_json;
@@ -18,10 +19,8 @@ use crate::CONFIG;
 
 const U2F_VERSION: &str = "U2F_V2";
 
-lazy_static! {
-    static ref APP_ID: String = format!("{}/app-id.json", &CONFIG.domain());
-    static ref U2F: U2f = U2f::new(APP_ID.clone());
-}
+static APP_ID: Lazy<String> = Lazy::new(|| format!("{}/app-id.json", &CONFIG.domain()));
+static U2F: Lazy<U2f> = Lazy::new(|| U2f::new(APP_ID.clone()));
 
 pub fn routes() -> Vec<Route> {
     routes![

src/api/icons.rs

@@ -1,3 +1,4 @@
+use once_cell::sync::Lazy;
 use std::fs::{create_dir_all, remove_file, symlink_metadata, File};
 use std::io::prelude::*;
 use std::net::ToSocketAddrs;
@@ -26,16 +27,16 @@ const FALLBACK_ICON: &[u8; 344] = include_bytes!("../static/fallback-icon.png");
 
 const ALLOWED_CHARS: &str = "_-.";
 
-lazy_static! {
+static CLIENT: Lazy<Client> = Lazy::new(|| {
     // Reuse the client between requests
-    static ref CLIENT: Client = Client::builder()
+    Client::builder()
         .use_sys_proxy()
         .gzip(true)
         .timeout(Duration::from_secs(CONFIG.icon_download_timeout()))
         .default_headers(_header_map())
         .build()
-        .unwrap();
-}
+        .unwrap()
+});
 
 fn is_valid_domain(domain: &str) -> bool {
     // Don't allow empty or too big domains or path traversal

src/auth.rs

@@ -3,6 +3,7 @@
 //
 use crate::util::read_file;
 use chrono::{Duration, Utc};
+use once_cell::sync::Lazy;
 
 use jsonwebtoken::{self, Algorithm, Header};
 use serde::de::DeserializeOwned;
@@ -13,23 +14,21 @@ use crate::CONFIG;
 
 const JWT_ALGORITHM: Algorithm = Algorithm::RS256;
 
-lazy_static! {
-    pub static ref DEFAULT_VALIDITY: Duration = Duration::hours(2);
-    static ref JWT_HEADER: Header = Header::new(JWT_ALGORITHM);
-    pub static ref JWT_LOGIN_ISSUER: String = format!("{}|login", CONFIG.domain_origin());
-    pub static ref JWT_INVITE_ISSUER: String = format!("{}|invite", CONFIG.domain_origin());
-    pub static ref JWT_DELETE_ISSUER: String = format!("{}|delete", CONFIG.domain_origin());
-    pub static ref JWT_VERIFYEMAIL_ISSUER: String = format!("{}|verifyemail", CONFIG.domain_origin());
-    pub static ref JWT_ADMIN_ISSUER: String = format!("{}|admin", CONFIG.domain_origin());
-    static ref PRIVATE_RSA_KEY: Vec<u8> = match read_file(&CONFIG.private_rsa_key()) {
-        Ok(key) => key,
-        Err(e) => panic!("Error loading private RSA Key.\n Error: {}", e),
-    };
-    static ref PUBLIC_RSA_KEY: Vec<u8> = match read_file(&CONFIG.public_rsa_key()) {
-        Ok(key) => key,
-        Err(e) => panic!("Error loading public RSA Key.\n Error: {}", e),
-    };
-}
+pub static DEFAULT_VALIDITY: Lazy<Duration> = Lazy::new(|| Duration::hours(2));
+static JWT_HEADER: Lazy<Header> = Lazy::new(|| Header::new(JWT_ALGORITHM));
+pub static JWT_LOGIN_ISSUER: Lazy<String> = Lazy::new(|| format!("{}|login", CONFIG.domain_origin()));
+static JWT_INVITE_ISSUER: Lazy<String> = Lazy::new(|| format!("{}|invite", CONFIG.domain_origin()));
+static JWT_DELETE_ISSUER: Lazy<String> = Lazy::new(|| format!("{}|delete", CONFIG.domain_origin()));
+static JWT_VERIFYEMAIL_ISSUER: Lazy<String> = Lazy::new(|| format!("{}|verifyemail", CONFIG.domain_origin()));
+static JWT_ADMIN_ISSUER: Lazy<String> = Lazy::new(|| format!("{}|admin", CONFIG.domain_origin()));
+static PRIVATE_RSA_KEY: Lazy<Vec<u8>> = Lazy::new(|| match read_file(&CONFIG.private_rsa_key()) {
+    Ok(key) => key,
+    Err(e) => panic!("Error loading private RSA Key.\n Error: {}", e),
+});
+static PUBLIC_RSA_KEY: Lazy<Vec<u8>> = Lazy::new(|| match read_file(&CONFIG.public_rsa_key()) {
+    Ok(key) => key,
+    Err(e) => panic!("Error loading public RSA Key.\n Error: {}", e),
+});
 
 pub fn encode_jwt<T: Serialize>(claims: &T) -> String {
     match jsonwebtoken::encode(&JWT_HEADER, claims, &PRIVATE_RSA_KEY) {

src/config.rs

@@ -1,3 +1,4 @@
+use once_cell::sync::Lazy;
 use std::process::exit;
 use std::sync::RwLock;
 
@@ -6,16 +7,17 @@ use reqwest::Url;
 use crate::error::Error;
 use crate::util::{get_env, get_env_bool};
 
-lazy_static! {
-    pub static ref CONFIG: Config = Config::load().unwrap_or_else(|e| {
+static CONFIG_FILE: Lazy<String> = Lazy::new(|| {
+    let data_folder = get_env("DATA_FOLDER").unwrap_or_else(|| String::from("data"));
+    get_env("CONFIG_FILE").unwrap_or_else(|| format!("{}/config.json", data_folder))
+});
+
+pub static CONFIG: Lazy<Config> = Lazy::new(|| {
+    Config::load().unwrap_or_else(|e| {
         println!("Error loading config:\n\t{:?}\n", e);
         exit(12)
-    });
-    pub static ref CONFIG_FILE: String = {
-        let data_folder = get_env("DATA_FOLDER").unwrap_or_else(|| String::from("data"));
-        get_env("CONFIG_FILE").unwrap_or_else(|| format!("{}/config.json", data_folder))
-    };
-}
+    })
+});
 
 pub type Pass = String;
 

src/main.rs

@@ -16,8 +16,6 @@ extern crate diesel;
 #[macro_use]
 extern crate diesel_migrations;
 #[macro_use]
-extern crate lazy_static;
-#[macro_use]
 extern crate derive_more;
 #[macro_use]
 extern crate num_derive;