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use std::{env, error::Error};
type DynError = Box<dyn Error>;
pub mod helpers {
use std::{
fmt::Display,
path::{Path, PathBuf},
};
use crate::path;
use helix_core::syntax::Configuration as LangConfig;
#[derive(Copy, Clone)]
pub enum TsFeature {
Highlight,
TextObjects,
AutoIndent,
}
impl TsFeature {
pub fn all() -> &'static [Self] {
&[Self::Highlight, Self::TextObjects, Self::AutoIndent]
}
pub fn runtime_filename(&self) -> &'static str {
match *self {
Self::Highlight => "highlights.scm",
Self::TextObjects => "textobjects.scm",
Self::AutoIndent => "indents.toml",
}
}
}
impl Display for TsFeature {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(
f,
"{}",
match *self {
Self::Highlight => "Syntax Highlighting",
Self::TextObjects => "Treesitter Textobjects",
Self::AutoIndent => "Auto Indent",
}
)
}
}
/// Get the list of languages that support a particular tree-sitter
/// based feature.
pub fn ts_lang_support(feat: TsFeature) -> Vec<String> {
let queries_dir = path::ts_queries();
find_files(&queries_dir, feat.runtime_filename())
.iter()
.map(|f| {
// .../helix/runtime/queries/python/highlights.scm
let tail = f.strip_prefix(&queries_dir).unwrap(); // python/highlights.scm
let lang = tail.components().next().unwrap(); // python
lang.as_os_str().to_string_lossy().to_string()
})
.collect()
}
/// Get the list of languages that have any form of tree-sitter
/// queries defined in the runtime directory.
pub fn langs_with_ts_queries() -> Vec<String> {
std::fs::read_dir(path::ts_queries())
.unwrap()
.filter_map(|entry| {
let entry = entry.ok()?;
entry
.file_type()
.ok()?
.is_dir()
.then(|| entry.file_name().to_string_lossy().to_string())
})
.collect()
}
// naive implementation, but suffices for our needs
pub fn find_files(dir: &Path, filename: &str) -> Vec<PathBuf> {
std::fs::read_dir(dir)
.unwrap()
.filter_map(|entry| {
let path = entry.ok()?.path();
if path.is_dir() {
Some(find_files(&path, filename))
} else {
(path.file_name()?.to_string_lossy() == filename).then(|| vec![path])
}
})
.flatten()
.collect()
}
pub fn lang_config() -> LangConfig {
let bytes = std::fs::read(path::lang_config()).unwrap();
toml::from_slice(&bytes).unwrap()
}
}
pub mod md_gen {
use crate::DynError;
use crate::helpers;
use crate::path;
use std::fs;
use helix_term::commands::TYPABLE_COMMAND_LIST;
pub const TYPABLE_COMMANDS_MD_OUTPUT: &str = "typable-cmd.md";
pub const LANG_SUPPORT_MD_OUTPUT: &str = "lang-support.md";
fn md_table_heading(cols: &[String]) -> String {
let mut header = String::new();
header += &md_table_row(cols);
header += &md_table_row(&vec!["---".to_string(); cols.len()]);
header
}
fn md_table_row(cols: &[String]) -> String {
format!("| {} |\n", cols.join(" | "))
}
fn md_mono(s: &str) -> String {
format!("`{}`", s)
}
pub fn typable_commands() -> Result<String, DynError> {
let mut md = String::new();
md.push_str(&md_table_heading(&[
"Name".to_owned(),
"Description".to_owned(),
]));
let cmdify = |s: &str| format!("`:{}`", s);
for cmd in TYPABLE_COMMAND_LIST {
let names = std::iter::once(&cmd.name)
.chain(cmd.aliases.iter())
.map(|a| cmdify(a))
.collect::<Vec<_>>()
.join(", ");
md.push_str(&md_table_row(&[names.to_owned(), cmd.doc.to_owned()]));
}
Ok(md)
}
pub fn lang_features() -> Result<String, DynError> {
let mut md = String::new();
let ts_features = helpers::TsFeature::all();
let mut cols = vec!["Language".to_owned()];
cols.append(
&mut ts_features
.iter()
.map(|t| t.to_string())
.collect::<Vec<_>>(),
);
cols.push("Default LSP".to_owned());
md.push_str(&md_table_heading(&cols));
let config = helpers::lang_config();
let mut langs = config
.language
.iter()
.map(|l| l.language_id.clone())
.collect::<Vec<_>>();
langs.sort_unstable();
let mut ts_features_to_langs = Vec::new();
for &feat in ts_features {
ts_features_to_langs.push((feat, helpers::ts_lang_support(feat)));
}
let mut row = Vec::new();
for lang in langs {
let lc = config
.language
.iter()
.find(|l| l.language_id == lang)
.unwrap(); // lang comes from config
row.push(lc.language_id.clone());
for (_feat, support_list) in &ts_features_to_langs {
row.push(
if support_list.contains(&lang) {
"✓"
} else {
""
}
.to_owned(),
);
}
row.push(
lc.language_server
.as_ref()
.map(|s| s.command.clone())
.map(|c| md_mono(&c))
.unwrap_or_default(),
);
md.push_str(&md_table_row(&row));
row.clear();
}
Ok(md)
}
pub fn write(filename: &str, data: &str) {
let error = format!("Could not write to {}", filename);
let path = path::book_gen().join(filename);
fs::write(path, data).expect(&error);
}
}
pub mod path {
use std::path::{Path, PathBuf};
pub fn project_root() -> PathBuf {
Path::new(env!("CARGO_MANIFEST_DIR"))
.parent()
.unwrap()
.to_path_buf()
}
pub fn book_gen() -> PathBuf {
project_root().join("book/src/generated/")
}
pub fn ts_queries() -> PathBuf {
project_root().join("runtime/queries")
}
pub fn lang_config() -> PathBuf {
project_root().join("languages.toml")
}
}
pub mod tasks {
use crate::md_gen;
use crate::DynError;
pub fn docgen() -> Result<(), DynError> {
use md_gen::*;
write(TYPABLE_COMMANDS_MD_OUTPUT, &typable_commands()?);
write(LANG_SUPPORT_MD_OUTPUT, &lang_features()?);
Ok(())
}
pub fn print_help() {
println!(
"
Usage: Run with `cargo xtask <task>`, eg. `cargo xtask docgen`.
Tasks:
docgen: Generate files to be included in the mdbook output.
"
);
}
}
fn main() -> Result<(), DynError> {
let task = env::args().nth(1);
match task {
None => tasks::print_help(),
Some(t) => match t.as_str() {
"docgen" => tasks::docgen()?,
invalid => return Err(format!("Invalid task name: {}", invalid).into()),
},
};
Ok(())
}
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