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//! Generates descriptors structure for unstable feature from Unstable Book
use crate::codegen::{self, project_root, Mode, Result};
use crate::codegen::{reformat, update};
use crate::not_bash::{fs2, pushd, run};
use proc_macro2::TokenStream;
use quote::quote;
use std::path::PathBuf;
use walkdir::WalkDir;
fn generate_descriptor(src_dir: PathBuf) -> Result<TokenStream> {
let files = WalkDir::new(src_dir.join("language-features"))
.into_iter()
.chain(WalkDir::new(src_dir.join("library-features")))
.filter_map(|e| e.ok())
.filter(|entry| {
// Get all `.md ` files
entry.file_type().is_file() && entry.path().extension().unwrap_or_default() == "md"
})
.collect::<Vec<_>>();
let definitions = files
.iter()
.map(|entry| {
let path = entry.path();
let feature_ident =
format!("{}", path.file_stem().unwrap().to_str().unwrap().replace("-", "_"));
let doc = format!("{}", std::fs::read_to_string(path).unwrap());
quote! { LintCompletion { label: #feature_ident, description: #doc } }
})
.collect::<Vec<_>>();
let ts = quote! {
use crate::completion::LintCompletion;
pub(crate) const UNSTABLE_FEATURE_DESCRIPTOR: &[LintCompletion] = &[
#(#definitions),*
];
};
Ok(ts)
}
pub fn generate_unstable_future_descriptor(mode: Mode) -> Result<()> {
let path = project_root().join(codegen::STORAGE);
fs2::create_dir_all(path.clone())?;
let _d = pushd(path.clone());
run!("git init")?;
run!("git remote add -f origin {}", codegen::REPOSITORY_URL)?;
run!("git pull origin master")?;
let src_dir = path.join(codegen::REPO_PATH);
let content = generate_descriptor(src_dir)?.to_string();
let contents = reformat(content)?;
let destination = project_root().join(codegen::UNSTABLE_FEATURE);
update(destination.as_path(), &contents, mode)?;
Ok(())
}
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