ZIm/crates/docs_preprocessor/src/main.rs
2025-07-31 16:18:47 +00:00

256 lines
8 KiB
Rust

use anyhow::Result;
use clap::{Arg, ArgMatches, Command};
use mdbook::BookItem;
use mdbook::book::{Book, Chapter};
use mdbook::preprocess::CmdPreprocessor;
use regex::Regex;
use settings::KeymapFile;
use std::collections::HashSet;
use std::io::{self, Read};
use std::process;
use std::sync::LazyLock;
static KEYMAP_MACOS: LazyLock<KeymapFile> = LazyLock::new(|| {
load_keymap("keymaps/default-macos.json").expect("Failed to load MacOS keymap")
});
static KEYMAP_LINUX: LazyLock<KeymapFile> = LazyLock::new(|| {
load_keymap("keymaps/default-linux.json").expect("Failed to load Linux keymap")
});
static ALL_ACTIONS: LazyLock<Vec<ActionDef>> = LazyLock::new(dump_all_gpui_actions);
pub fn make_app() -> Command {
Command::new("zed-docs-preprocessor")
.about("Preprocesses Zed Docs content to provide rich action & keybinding support and more")
.subcommand(
Command::new("supports")
.arg(Arg::new("renderer").required(true))
.about("Check whether a renderer is supported by this preprocessor"),
)
}
fn main() -> Result<()> {
let matches = make_app().get_matches();
// call a zed:: function so everything in `zed` crate is linked and
// all actions in the actual app are registered
zed::stdout_is_a_pty();
if let Some(sub_args) = matches.subcommand_matches("supports") {
handle_supports(sub_args);
} else {
handle_preprocessing()?;
}
Ok(())
}
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
enum Error {
ActionNotFound { action_name: String },
DeprecatedActionUsed { used: String, should_be: String },
}
impl Error {
fn new_for_not_found_action(action_name: String) -> Self {
for action in &*ALL_ACTIONS {
for alias in action.deprecated_aliases {
if alias == &action_name {
return Error::DeprecatedActionUsed {
used: action_name.clone(),
should_be: action.name.to_string(),
};
}
}
}
Error::ActionNotFound {
action_name: action_name.to_string(),
}
}
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Error::ActionNotFound { action_name } => write!(f, "Action not found: {}", action_name),
Error::DeprecatedActionUsed { used, should_be } => write!(
f,
"Deprecated action used: {} should be {}",
used, should_be
),
}
}
}
fn handle_preprocessing() -> Result<()> {
let mut stdin = io::stdin();
let mut input = String::new();
stdin.read_to_string(&mut input)?;
let (_ctx, mut book) = CmdPreprocessor::parse_input(input.as_bytes())?;
let mut errors = HashSet::<Error>::new();
template_and_validate_keybindings(&mut book, &mut errors);
template_and_validate_actions(&mut book, &mut errors);
if !errors.is_empty() {
const ANSI_RED: &'static str = "\x1b[31m";
const ANSI_RESET: &'static str = "\x1b[0m";
for error in &errors {
eprintln!("{ANSI_RED}ERROR{ANSI_RESET}: {}", error);
}
return Err(anyhow::anyhow!("Found {} errors in docs", errors.len()));
}
serde_json::to_writer(io::stdout(), &book)?;
Ok(())
}
fn handle_supports(sub_args: &ArgMatches) -> ! {
let renderer = sub_args
.get_one::<String>("renderer")
.expect("Required argument");
let supported = renderer != "not-supported";
if supported {
process::exit(0);
} else {
process::exit(1);
}
}
fn template_and_validate_keybindings(book: &mut Book, errors: &mut HashSet<Error>) {
let regex = Regex::new(r"\{#kb (.*?)\}").unwrap();
for_each_chapter_mut(book, |chapter| {
chapter.content = regex
.replace_all(&chapter.content, |caps: &regex::Captures| {
let action = caps[1].trim();
if find_action_by_name(action).is_none() {
errors.insert(Error::new_for_not_found_action(action.to_string()));
return String::new();
}
let macos_binding = find_binding("macos", action).unwrap_or_default();
let linux_binding = find_binding("linux", action).unwrap_or_default();
if macos_binding.is_empty() && linux_binding.is_empty() {
return "<div>No default binding</div>".to_string();
}
format!("<kbd class=\"keybinding\">{macos_binding}|{linux_binding}</kbd>")
})
.into_owned()
});
}
fn template_and_validate_actions(book: &mut Book, errors: &mut HashSet<Error>) {
let regex = Regex::new(r"\{#action (.*?)\}").unwrap();
for_each_chapter_mut(book, |chapter| {
chapter.content = regex
.replace_all(&chapter.content, |caps: &regex::Captures| {
let name = caps[1].trim();
let Some(action) = find_action_by_name(name) else {
errors.insert(Error::new_for_not_found_action(name.to_string()));
return String::new();
};
format!("<code class=\"hljs\">{}</code>", &action.human_name)
})
.into_owned()
});
}
fn find_action_by_name(name: &str) -> Option<&ActionDef> {
ALL_ACTIONS
.binary_search_by(|action| action.name.cmp(name))
.ok()
.map(|index| &ALL_ACTIONS[index])
}
fn find_binding(os: &str, action: &str) -> Option<String> {
let keymap = match os {
"macos" => &KEYMAP_MACOS,
"linux" | "freebsd" => &KEYMAP_LINUX,
_ => unreachable!("Not a valid OS: {}", os),
};
// Find the binding in reverse order, as the last binding takes precedence.
keymap.sections().rev().find_map(|section| {
section.bindings().rev().find_map(|(keystroke, a)| {
if name_for_action(a.to_string()) == action {
Some(keystroke.to_string())
} else {
None
}
})
})
}
/// Removes any configurable options from the stringified action if existing,
/// ensuring that only the actual action name is returned. If the action consists
/// only of a string and nothing else, the string is returned as-is.
///
/// Example:
///
/// This will return the action name unmodified.
///
/// ```
/// let action_as_str = "assistant::Assist";
/// let action_name = name_for_action(action_as_str);
/// assert_eq!(action_name, "assistant::Assist");
/// ```
///
/// This will return the action name with any trailing options removed.
///
///
/// ```
/// let action_as_str = "\"editor::ToggleComments\", {\"advance_downwards\":false}";
/// let action_name = name_for_action(action_as_str);
/// assert_eq!(action_name, "editor::ToggleComments");
/// ```
fn name_for_action(action_as_str: String) -> String {
action_as_str
.split(",")
.next()
.map(|name| name.trim_matches('"').to_string())
.unwrap_or(action_as_str)
}
fn load_keymap(asset_path: &str) -> Result<KeymapFile> {
let content = util::asset_str::<settings::SettingsAssets>(asset_path);
KeymapFile::parse(content.as_ref())
}
fn for_each_chapter_mut<F>(book: &mut Book, mut func: F)
where
F: FnMut(&mut Chapter),
{
book.for_each_mut(|item| {
let BookItem::Chapter(chapter) = item else {
return;
};
func(chapter);
});
}
#[derive(Debug, serde::Serialize)]
struct ActionDef {
name: &'static str,
human_name: String,
deprecated_aliases: &'static [&'static str],
}
fn dump_all_gpui_actions() -> Vec<ActionDef> {
let mut actions = gpui::generate_list_of_all_registered_actions()
.map(|action| ActionDef {
name: action.name,
human_name: command_palette::humanize_action_name(action.name),
deprecated_aliases: action.deprecated_aliases,
})
.collect::<Vec<ActionDef>>();
actions.sort_by_key(|a| a.name);
return actions;
}