1 //! Generates `assists.md` documentation.
3 use std::{fmt, fs, path::PathBuf};
6 codegen::{self, extract_comment_blocks_with_empty_lines, Mode},
7 project_root, rust_files, Result,
10 pub fn generate_feature_docs(mode: Mode) -> Result<()> {
11 let features = Feature::collect()?;
12 let contents = features.into_iter().map(|it| it.to_string()).collect::<Vec<_>>().join("\n\n");
14 let dst = project_root().join("docs/user/generated_features.adoc");
15 codegen::update(&dst, &contents, mode)?;
27 fn collect() -> Result<Vec<Feature>> {
28 let mut res = Vec::new();
29 for path in rust_files(&project_root()) {
30 collect_file(&mut res, path)?;
32 res.sort_by(|lhs, rhs| lhs.id.cmp(&rhs.id));
35 fn collect_file(acc: &mut Vec<Feature>, path: PathBuf) -> Result<()> {
36 let text = fs::read_to_string(&path)?;
37 let comment_blocks = extract_comment_blocks_with_empty_lines("Feature", &text);
39 for block in comment_blocks {
41 assert!(is_valid_feature_name(&id), "invalid feature name: {:?}", id);
42 let doc = block.contents.join("\n");
43 acc.push(Feature { id, path: path.clone(), doc })
51 fn is_valid_feature_name(feature: &str) -> bool {
52 'word: for word in feature.split_whitespace() {
53 for &short in ["to"].iter() {
58 for &short in ["To"].iter() {
63 if !word.starts_with(char::is_uppercase) {
70 impl fmt::Display for Feature {
71 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
72 writeln!(f, "=== {}", self.id)?;
73 let path = self.path.strip_prefix(&project_root()).unwrap();
74 let name = self.path.file_name().unwrap();
76 //FIXME: generate line number as well
79 "**Source:** https://github.com/rust-analyzer/rust-analyzer/blob/master/{}[{}]",
81 name.to_str().unwrap(),
84 writeln!(f, "\n{}", self.doc)?;