//! We use code generation heavily in rust-analyzer. //! //! Rather then doing it via proc-macros, we use old-school way of just dumping //! the source code. //! //! This module's submodules define specific bits that we generate. mod gen_syntax; mod gen_parser_tests; mod gen_assists_docs; use std::{fs, mem, path::Path}; use crate::Result; pub use self::{ gen_assists_docs::generate_assists_docs, gen_parser_tests::generate_parser_tests, gen_syntax::generate_syntax, }; const GRAMMAR_DIR: &str = "crates/ra_parser/src/grammar"; const OK_INLINE_TESTS_DIR: &str = "crates/ra_syntax/test_data/parser/inline/ok"; const ERR_INLINE_TESTS_DIR: &str = "crates/ra_syntax/test_data/parser/inline/err"; pub const SYNTAX_KINDS: &str = "crates/ra_parser/src/syntax_kind/generated.rs"; pub const AST: &str = "crates/ra_syntax/src/ast/generated.rs"; const ASSISTS_DIR: &str = "crates/ra_assists/src/handlers"; const ASSISTS_TESTS: &str = "crates/ra_assists/src/doc_tests/generated.rs"; const ASSISTS_DOCS: &str = "docs/user/assists.md"; #[derive(Debug, PartialEq, Eq, Clone, Copy)] pub enum Mode { Overwrite, Verify, } /// A helper to update file on disk if it has changed. /// With verify = false, fn update(path: &Path, contents: &str, mode: Mode) -> Result<()> { match fs::read_to_string(path) { Ok(ref old_contents) if normalize(old_contents) == normalize(contents) => { return Ok(()); } _ => (), } if mode == Mode::Verify { anyhow::bail!("`{}` is not up-to-date", path.display()); } eprintln!("updating {}", path.display()); fs::write(path, contents)?; return Ok(()); fn normalize(s: &str) -> String { s.replace("\r\n", "\n") } } fn extract_comment_blocks(text: &str) -> Vec<Vec<String>> { do_extract_comment_blocks(text, false) } fn extract_comment_blocks_with_empty_lines(text: &str) -> Vec<Vec<String>> { do_extract_comment_blocks(text, true) } fn do_extract_comment_blocks(text: &str, allow_blocks_with_empty_lins: bool) -> Vec<Vec<String>> { let mut res = Vec::new(); let prefix = "// "; let lines = text.lines().map(str::trim_start); let mut block = vec![]; for line in lines { if line == "//" && allow_blocks_with_empty_lins { block.push(String::new()); continue; } let is_comment = line.starts_with(prefix); if is_comment { block.push(line[prefix.len()..].to_string()); } else if !block.is_empty() { res.push(mem::replace(&mut block, Vec::new())); } } if !block.is_empty() { res.push(mem::replace(&mut block, Vec::new())) } res }