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//! Generates `assists.md` documentation.
use std::{fmt, path::Path};
use crate::{
codegen::{self, extract_comment_blocks_with_empty_lines, reformat, Location, Mode, PREAMBLE},
project_root, rust_files_in, Result,
};
pub fn generate_assists_tests(mode: Mode) -> Result<()> {
let assists = Assist::collect()?;
generate_tests(&assists, mode)
}
pub fn generate_assists_docs(mode: Mode) -> Result<()> {
let assists = Assist::collect()?;
let contents = assists.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_assists.adoc");
codegen::update(&dst, &contents, mode)
}
#[derive(Debug)]
struct Assist {
id: String,
location: Location,
doc: String,
before: String,
after: String,
}
impl Assist {
fn collect() -> Result<Vec<Assist>> {
let mut res = Vec::new();
for path in rust_files_in(&project_root().join("crates/ide_assists/src/handlers")) {
collect_file(&mut res, path.as_path())?;
}
res.sort_by(|lhs, rhs| lhs.id.cmp(&rhs.id));
return Ok(res);
fn collect_file(acc: &mut Vec<Assist>, path: &Path) -> Result<()> {
let text = xshell::read_file(path)?;
let comment_blocks = extract_comment_blocks_with_empty_lines("Assist", &text);
for block in comment_blocks {
// FIXME: doesn't support blank lines yet, need to tweak
// `extract_comment_blocks` for that.
let id = block.id;
assert!(
id.chars().all(|it| it.is_ascii_lowercase() || it == '_'),
"invalid assist id: {:?}",
id
);
let mut lines = block.contents.iter();
let doc = take_until(lines.by_ref(), "```").trim().to_string();
assert!(
doc.chars().next().unwrap().is_ascii_uppercase() && doc.ends_with('.'),
"\n\n{}: assist docs should be proper sentences, with capitalization and a full stop at the end.\n\n{}\n\n",
id, doc,
);
let before = take_until(lines.by_ref(), "```");
assert_eq!(lines.next().unwrap().as_str(), "->");
assert_eq!(lines.next().unwrap().as_str(), "```");
let after = take_until(lines.by_ref(), "```");
let location = Location::new(path.to_path_buf(), block.line);
acc.push(Assist { id, location, doc, before, after })
}
fn take_until<'a>(lines: impl Iterator<Item = &'a String>, marker: &str) -> String {
let mut buf = Vec::new();
for line in lines {
if line == marker {
break;
}
buf.push(line.clone());
}
buf.join("\n")
}
Ok(())
}
}
}
impl fmt::Display for Assist {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let before = self.before.replace("$0", "┃"); // Unicode pseudo-graphics bar
let after = self.after.replace("$0", "┃");
writeln!(
f,
"[discrete]\n=== `{}`
**Source:** {}
{}
.Before
```rust
{}```
.After
```rust
{}```",
self.id,
self.location,
self.doc,
hide_hash_comments(&before),
hide_hash_comments(&after)
)
}
}
fn generate_tests(assists: &[Assist], mode: Mode) -> Result<()> {
let mut buf = String::from("use super::check_doc_test;\n");
for assist in assists.iter() {
let test = format!(
r######"
#[test]
fn doctest_{}() {{
check_doc_test(
"{}",
r#####"
{}"#####, r#####"
{}"#####)
}}
"######,
assist.id,
assist.id,
reveal_hash_comments(&assist.before),
reveal_hash_comments(&assist.after)
);
buf.push_str(&test)
}
let buf = reformat(&buf)?;
codegen::update(&project_root().join("crates/ide_assists/src/tests/generated.rs"), &buf, mode)
}
fn hide_hash_comments(text: &str) -> String {
text.split('\n') // want final newline
.filter(|&it| !(it.starts_with("# ") || it == "#"))
.map(|it| format!("{}\n", it))
.collect()
}
fn reveal_hash_comments(text: &str) -> String {
text.split('\n') // want final newline
.map(|it| {
if it.starts_with("# ") {
&it[2..]
} else if it == "#" {
""
} else {
it
}
})
.map(|it| format!("{}\n", it))
.collect()
}
|
