1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201
#![cfg_attr( not(any(feature = "postgres", feature = "mysql")), allow(dead_code, unused_macros, unused_imports) )] extern crate proc_macro; use proc_macro::TokenStream; use quote::quote; #[cfg(feature = "runtime-async-std")] use async_std::task::block_on; use url::Url; type Error = Box<dyn std::error::Error>; type Result<T> = std::result::Result<T, Error>; mod database; mod derives; mod query_macros; mod runtime; use query_macros::*; #[cfg(feature = "runtime-tokio")] lazy_static::lazy_static! { static ref BASIC_RUNTIME: tokio::runtime::Runtime = { tokio::runtime::Builder::new() .threaded_scheduler() .enable_io() .enable_time() .build() .expect("failed to build tokio runtime") }; } #[cfg(feature = "runtime-tokio")] fn block_on<F: std::future::Future>(future: F) -> F::Output { BASIC_RUNTIME.enter(|| futures::executor::block_on(future)) } fn macro_result(tokens: proc_macro2::TokenStream) -> TokenStream { quote!( macro_rules! macro_result { ($($args:tt)*) => (#tokens) } ) .into() } macro_rules! async_macro ( ($db:ident, $input:ident: $ty:ty => $expr:expr) => {{ let $input = match syn::parse::<$ty>($input) { Ok(input) => input, Err(e) => return macro_result(e.to_compile_error()), }; let res: Result<proc_macro2::TokenStream> = block_on(async { use sqlx::connection::Connect; let db_url = Url::parse(&dotenv::var("DATABASE_URL").map_err(|_| "DATABASE_URL not set")?)?; match db_url.scheme() { #[cfg(feature = "sqlite")] "sqlite" => { let $db = sqlx::sqlite::SqliteConnection::connect(db_url.as_str()) .await .map_err(|e| format!("failed to connect to database: {}", e))?; $expr.await } #[cfg(not(feature = "sqlite"))] "sqlite" => Err(format!( "DATABASE_URL {} has the scheme of a SQLite database but the `sqlite` \ feature of sqlx was not enabled", db_url ).into()), #[cfg(feature = "postgres")] "postgresql" | "postgres" => { let $db = sqlx::postgres::PgConnection::connect(db_url.as_str()) .await .map_err(|e| format!("failed to connect to database: {}", e))?; $expr.await } #[cfg(not(feature = "postgres"))] "postgresql" | "postgres" => Err(format!( "DATABASE_URL {} has the scheme of a Postgres database but the `postgres` \ feature of sqlx was not enabled", db_url ).into()), #[cfg(feature = "mysql")] "mysql" | "mariadb" => { let $db = sqlx::mysql::MySqlConnection::connect(db_url.as_str()) .await .map_err(|e| format!("failed to connect to database: {}", e))?; $expr.await } #[cfg(not(feature = "mysql"))] "mysql" | "mariadb" => Err(format!( "DATABASE_URL {} has the scheme of a MySQL/MariaDB database but the `mysql` \ feature of sqlx was not enabled", db_url ).into()), scheme => Err(format!("unexpected scheme {:?} in DATABASE_URL {}", scheme, db_url).into()), } }); match res { Ok(ts) => ts.into(), Err(e) => { if let Some(parse_err) = e.downcast_ref::<syn::Error>() { macro_result(parse_err.to_compile_error()) } else { let msg = e.to_string(); macro_result(quote!(compile_error!(#msg))) } } } }} ); #[proc_macro] #[allow(unused_variables)] pub fn query(input: TokenStream) -> TokenStream { #[allow(unused_variables)] async_macro!(db, input: QueryMacroInput => expand_query(input, db)) } #[proc_macro] #[allow(unused_variables)] pub fn query_file(input: TokenStream) -> TokenStream { #[allow(unused_variables)] async_macro!(db, input: QueryMacroInput => expand_query_file(input, db)) } #[proc_macro] #[allow(unused_variables)] pub fn query_as(input: TokenStream) -> TokenStream { #[allow(unused_variables)] async_macro!(db, input: QueryAsMacroInput => expand_query_as(input, db, true)) } #[proc_macro] #[allow(unused_variables)] pub fn query_file_as(input: TokenStream) -> TokenStream { async_macro!(db, input: QueryAsMacroInput => expand_query_file_as(input, db, true)) } #[proc_macro] #[allow(unused_variables)] pub fn query_as_unchecked(input: TokenStream) -> TokenStream { #[allow(unused_variables)] async_macro!(db, input: QueryAsMacroInput => expand_query_as(input, db, false)) } #[proc_macro] #[allow(unused_variables)] pub fn query_file_as_unchecked(input: TokenStream) -> TokenStream { async_macro!(db, input: QueryAsMacroInput => expand_query_file_as(input, db, false)) } #[proc_macro_derive(Encode, attributes(sqlx))] pub fn derive_encode(tokenstream: TokenStream) -> TokenStream { let input = syn::parse_macro_input!(tokenstream as syn::DeriveInput); match derives::expand_derive_encode(&input) { Ok(ts) => ts.into(), Err(e) => e.to_compile_error().into(), } } #[proc_macro_derive(Decode, attributes(sqlx))] pub fn derive_decode(tokenstream: TokenStream) -> TokenStream { let input = syn::parse_macro_input!(tokenstream as syn::DeriveInput); match derives::expand_derive_decode(&input) { Ok(ts) => ts.into(), Err(e) => e.to_compile_error().into(), } } #[proc_macro_derive(Type, attributes(sqlx))] pub fn derive_type(tokenstream: TokenStream) -> TokenStream { let input = syn::parse_macro_input!(tokenstream as syn::DeriveInput); match derives::expand_derive_type_encode_decode(&input) { Ok(ts) => ts.into(), Err(e) => e.to_compile_error().into(), } } #[proc_macro_derive(FromRow)] pub fn derive_from_row(input: TokenStream) -> TokenStream { let input = syn::parse_macro_input!(input as syn::DeriveInput); match derives::expand_derive_from_row(&input) { Ok(ts) => ts.into(), Err(e) => e.to_compile_error().into(), } }