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//! Generates `assists.md` documentation.
use std::{fmt, fs, path::PathBuf};
use crate::{
codegen::{self, extract_comment_blocks_with_empty_lines, Location, Mode, PREAMBLE},
project_root, rust_files, Result,
};
pub fn generate_feature_docs(mode: Mode) -> Result<()> {
let features = Feature::collect()?;
let contents = features.into_iter().map(|it| it.to_string()).collect::<Vec<_>>().join("\n\n");
let contents = format!("//{}\n{}\n", PREAMBLE, contents.trim());
let dst = project_root().join("docs/user/generated_features.adoc");
codegen::update(&dst, &contents, mode)?;
Ok(())
}
#[derive(Debug)]
struct Feature {
id: String,
location: Location,
doc: String,
}
impl Feature {
fn collect() -> Result<Vec<Feature>> {
let mut res = Vec::new();
for path in rust_files(&project_root()) {
collect_file(&mut res, path)?;
}
res.sort_by(|lhs, rhs| lhs.id.cmp(&rhs.id));
return Ok(res);
fn collect_file(acc: &mut Vec<Feature>, path: PathBuf) -> Result<()> {
let text = fs::read_to_string(&path)?;
let comment_blocks = extract_comment_blocks_with_empty_lines("Feature", &text);
for block in comment_blocks {
let id = block.id;
if let Err(msg) = is_valid_feature_name(&id) {
panic!("invalid feature name: {:?}:\n {}", id, msg)
}
let doc = block.contents.join("\n");
let location = Location::new(path.clone(), block.line);
acc.push(Feature { id, location, doc })
}
Ok(())
}
}
}
fn is_valid_feature_name(feature: &str) -> Result<(), String> {
'word: for word in feature.split_whitespace() {
for &short in ["to", "and"].iter() {
if word == short {
continue 'word;
}
}
for &short in ["To", "And"].iter() {
if word == short {
return Err(format!("Don't capitalize {:?}", word));
}
}
if !word.starts_with(char::is_uppercase) {
return Err(format!("Capitalize {:?}", word));
}
}
Ok(())
}
impl fmt::Display for Feature {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
writeln!(f, "=== {}\n**Source:** {}\n{}", self.id, self.location, self.doc)
}
}
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