//! Generates descriptors structure for unstable feature from Unstable Book use std::path::{Path, PathBuf}; use quote::quote; use walkdir::WalkDir; use xshell::{cmd, read_file}; use crate::codegen::{project_root, reformat, update, Mode, Result}; pub fn generate_features(mode: Mode) -> Result<()> { if !Path::new("./target/rust").exists() { cmd!("git clone https://github.com/rust-lang/rust ./target/rust").run()?; } let contents = generate_descriptor("./target/rust/src/doc/unstable-book/src".into())?; let destination = project_root().join("crates/ide/src/completion/generated_features.rs"); update(destination.as_path(), &contents, mode)?; Ok(()) } fn generate_descriptor(src_dir: PathBuf) -> Result<String> { let definitions = ["language-features", "library-features"] .iter() .flat_map(|it| WalkDir::new(src_dir.join(it))) .filter_map(|e| e.ok()) .filter(|entry| { // Get all `.md ` files entry.file_type().is_file() && entry.path().extension().unwrap_or_default() == "md" }) .map(|entry| { let path = entry.path(); let feature_ident = path.file_stem().unwrap().to_str().unwrap().replace("-", "_"); let doc = read_file(path).unwrap(); quote! { LintCompletion { label: #feature_ident, description: #doc } } }); let ts = quote! { use crate::completion::complete_attribute::LintCompletion; pub(super) const FEATURES: &[LintCompletion] = &[ #(#definitions),* ]; }; reformat(&ts.to_string()) }