Move repl stuff to separate file
This commit is contained in:
greg
parent
3c1823510f
commit
f9f29dd0dd
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@ -17,14 +17,11 @@ extern crate phf;
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use std::path::Path;
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use std::fs::File;
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use std::io::{Read, Write};
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use std::io::Read;
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use std::process::exit;
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use std::default::Default;
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use std::fmt::Write as FmtWrite;
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use colored::*;
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use itertools::Itertools;
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mod repl;
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mod language;
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mod webapp;
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pub mod llvm_wrap;
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@ -84,7 +81,7 @@ pub fn repl_main(generators: Vec<PLIGenerator>) {
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match option_matches.free[..] {
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[] | [_] => {
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let mut repl = Repl::new(languages, initial_index);
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let mut repl = repl::Repl::new(languages, initial_index);
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repl.run();
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}
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[_, ref filename, _..] => {
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@ -132,363 +129,6 @@ fn run_noninteractive(filename: &str, languages: Vec<Box<ProgrammingLanguageInte
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}
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}
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#[derive(Clone)]
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enum CommandTree {
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Terminal(String, Option<String>),
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NonTerminal(String, Vec<CommandTree>, Option<String>),
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Top(Vec<CommandTree>),
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}
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impl CommandTree {
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fn term(s: &str, help: Option<&str>) -> CommandTree {
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CommandTree::Terminal(s.to_string(), help.map(|x| x.to_string()))
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}
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fn get_cmd(&self) -> String {
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match self {
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CommandTree::Terminal(s, _) => s.to_string(),
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CommandTree::NonTerminal(s, _, _) => s.to_string(),
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CommandTree::Top(_) => "".to_string(),
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}
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}
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fn get_help(&self) -> String {
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match self {
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CommandTree::Terminal(_, h) => h.as_ref().map(|h| h.clone()).unwrap_or(format!("")),
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CommandTree::NonTerminal(_, _, h) => h.as_ref().map(|h| h.clone()).unwrap_or(format!("")),
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CommandTree::Top(_) => "".to_string(),
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}
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}
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fn get_children(&self) -> Vec<String> {
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match self {
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CommandTree::Terminal(_, _) => vec![],
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CommandTree::NonTerminal(_, children, _) => children.iter().map(|x| x.get_cmd()).collect(),
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CommandTree::Top(children) => children.iter().map(|x| x.get_cmd()).collect(),
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}
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}
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}
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struct TabCompleteHandler {
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sigil: char,
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top_level_commands: CommandTree,
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}
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use linefeed::complete::{Completion, Completer};
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use linefeed::terminal::Terminal;
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impl TabCompleteHandler {
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fn new(sigil: char, top_level_commands: CommandTree) -> TabCompleteHandler {
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TabCompleteHandler {
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top_level_commands,
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sigil,
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}
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}
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}
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impl<T: Terminal> Completer<T> for TabCompleteHandler {
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fn complete(&self, word: &str, prompter: &linefeed::prompter::Prompter<T>, start: usize, _end: usize) -> Option<Vec<Completion>> {
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let line = prompter.buffer();
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if line.starts_with(&format!("{}", self.sigil)) {
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let mut words = line[1..(if start == 0 { 1 } else { start })].split_whitespace();
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let mut completions = Vec::new();
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let mut command_tree: Option<&CommandTree> = Some(&self.top_level_commands);
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loop {
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match words.next() {
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None => {
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let top = match command_tree {
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Some(CommandTree::Top(_)) => true,
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_ => false
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};
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let word = if top { word.get(1..).unwrap() } else { word };
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for cmd in command_tree.map(|x| x.get_children()).unwrap_or(vec![]).into_iter() {
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if cmd.starts_with(word) {
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completions.push(Completion {
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completion: format!("{}{}", if top { ":" } else { "" }, cmd),
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display: Some(cmd.clone()),
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suffix: linefeed::complete::Suffix::Some(' ')
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})
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}
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}
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break;
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},
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Some(s) => {
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let new_ptr: Option<&CommandTree> = command_tree.and_then(|cm| match cm {
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CommandTree::Top(children) => children.iter().find(|c| c.get_cmd() == s),
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CommandTree::NonTerminal(_, children, _) => children.iter().find(|c| c.get_cmd() == s),
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CommandTree::Terminal(_, _) => None,
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});
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command_tree = new_ptr;
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}
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}
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}
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Some(completions)
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} else {
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None
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}
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}
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}
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struct Repl {
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options: EvalOptions,
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languages: Vec<Box<ProgrammingLanguageInterface>>,
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current_language_index: usize,
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interpreter_directive_sigil: char,
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line_reader: linefeed::interface::Interface<linefeed::terminal::DefaultTerminal>,
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}
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impl Repl {
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fn new(languages: Vec<Box<ProgrammingLanguageInterface>>, initial_index: usize) -> Repl {
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use linefeed::Interface;
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let i = if initial_index < languages.len() { initial_index } else { 0 };
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let line_reader = Interface::new("schala-repl").unwrap();
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Repl {
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options: Repl::get_options(),
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languages: languages,
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current_language_index: i,
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interpreter_directive_sigil: ':',
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line_reader
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}
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}
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fn get_cur_language(&self) -> &ProgrammingLanguageInterface {
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self.languages[self.current_language_index].as_ref()
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}
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fn get_options() -> EvalOptions {
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File::open(".schala_repl")
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.and_then(|mut file| {
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let mut contents = String::new();
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file.read_to_string(&mut contents)?;
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Ok(contents)
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})
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.and_then(|contents| {
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let options: EvalOptions = serde_json::from_str(&contents)?;
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Ok(options)
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}).unwrap_or(EvalOptions::default())
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}
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fn save_options(&self) {
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let ref options = self.options;
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let read = File::create(".schala_repl")
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.and_then(|mut file| {
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let buf = serde_json::to_string(options).unwrap();
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file.write_all(buf.as_bytes())
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});
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if let Err(err) = read {
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println!("Error saving .schala_repl file {}", err);
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}
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}
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fn run(&mut self) {
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use linefeed::ReadResult;
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println!("Schala MetaInterpreter version {}", VERSION_STRING);
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println!("Type {}help for help with the REPL", self.interpreter_directive_sigil);
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self.line_reader.load_history(".schala_history").unwrap_or(());
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loop {
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let language_name = self.get_cur_language().get_language_name();
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let directives = self.get_directives();
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let tab_complete_handler = TabCompleteHandler::new(self.interpreter_directive_sigil, directives);
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self.line_reader.set_completer(std::sync::Arc::new(tab_complete_handler));
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let prompt_str = format!("{} >> ", language_name);
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self.line_reader.set_prompt(&prompt_str);
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match self.line_reader.read_line() {
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Err(e) => {
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println!("Terminal read error: {}", e);
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},
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Ok(ReadResult::Eof) => break,
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Ok(ReadResult::Signal(_)) => break,
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Ok(ReadResult::Input(ref input)) => {
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self.line_reader.add_history_unique(input.to_string());
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let output = match input.chars().nth(0) {
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Some(ch) if ch == self.interpreter_directive_sigil => self.handle_interpreter_directive(input),
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_ => Some(self.input_handler(input)),
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};
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if let Some(o) = output {
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println!("=> {}", o);
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}
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}
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}
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}
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self.line_reader.save_history(".schala_history").unwrap_or(());
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self.save_options();
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println!("Exiting...");
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}
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fn input_handler(&mut self, input: &str) -> String {
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let ref mut language = self.languages[self.current_language_index];
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let interpreter_output = language.execute_pipeline(input, &self.options);
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interpreter_output.to_repl()
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}
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fn get_directives(&self) -> CommandTree {
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let ref passes = self.get_cur_language().get_passes();
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let passes_directives: Vec<CommandTree> = passes.iter()
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.map(|pass_descriptor| {
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let name = &pass_descriptor.name;
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if pass_descriptor.debug_options.len() == 0 {
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CommandTree::term(name, None)
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} else {
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let sub_opts: Vec<CommandTree> = pass_descriptor.debug_options.iter()
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.map(|o| CommandTree::term(o, None)).collect();
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CommandTree::NonTerminal(
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name.clone(),
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sub_opts,
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None
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)
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}
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}).collect();
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CommandTree::Top(vec![
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CommandTree::term("exit", Some("exit the REPL")),
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CommandTree::term("quit", Some("exit the REPL")),
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CommandTree::term("help", Some("Print this help message")),
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CommandTree::NonTerminal(format!("debug"), vec![
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CommandTree::term("passes", None),
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CommandTree::NonTerminal(format!("show"), passes_directives.clone(), None),
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CommandTree::NonTerminal(format!("hide"), passes_directives.clone(), None),
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], Some(format!("show or hide pass info for a given pass, or display the names of all passes"))),
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CommandTree::NonTerminal(format!("lang"), vec![
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CommandTree::term("next", None),
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CommandTree::term("prev", None),
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CommandTree::NonTerminal(format!("go"), vec![], None)//TODO
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], Some(format!("switch between languages, or go directly to a langauge by name"))),
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CommandTree::term("doc", Some("Get language-specific help for an item")),
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])
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}
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fn handle_interpreter_directive(&mut self, input: &str) -> Option<String> {
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let mut iter = input.chars();
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iter.next();
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let commands: Vec<&str> = iter
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.as_str()
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.split_whitespace()
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.collect();
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let cmd: &str = match commands.get(0).clone() {
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None => return None,
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Some(s) => s
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};
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match cmd {
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"exit" | "quit" => {
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self.save_options();
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exit(0)
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},
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"lang" | "language" => match commands.get(1) {
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Some(&"show") => {
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let mut buf = String::new();
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for (i, lang) in self.languages.iter().enumerate() {
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write!(buf, "{}{}\n", if i == self.current_language_index { "* "} else { "" }, lang.get_language_name()).unwrap();
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}
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Some(buf)
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},
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Some(&"go") => match commands.get(2) {
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None => Some(format!("Must specify a language name")),
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Some(&desired_name) => {
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for (i, _) in self.languages.iter().enumerate() {
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let lang_name = self.languages[i].get_language_name();
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if lang_name.to_lowercase() == desired_name.to_lowercase() {
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self.current_language_index = i;
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return Some(format!("Switching to {}", self.languages[self.current_language_index].get_language_name()));
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}
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}
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Some(format!("Language {} not found", desired_name))
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}
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},
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Some(&"next") | Some(&"n") => {
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self.current_language_index = (self.current_language_index + 1) % self.languages.len();
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Some(format!("Switching to {}", self.languages[self.current_language_index].get_language_name()))
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},
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Some(&"previous") | Some(&"p") | Some(&"prev") => {
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self.current_language_index = if self.current_language_index == 0 { self.languages.len() - 1 } else { self.current_language_index - 1 };
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Some(format!("Switching to {}", self.languages[self.current_language_index].get_language_name()))
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},
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Some(e) => Some(format!("Bad `lang(uage)` argument: {}", e)),
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None => Some(format!("Valid arguments for `lang(uage)` are `show`, `next`|`n`, `previous`|`prev`|`n`"))
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},
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"help" => {
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let mut buf = String::new();
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let ref lang = self.languages[self.current_language_index];
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let directives = match self.get_directives() {
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CommandTree::Top(children) => children,
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_ => panic!("Top-level CommandTree not Top")
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};
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writeln!(buf, "MetaInterpreter options").unwrap();
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writeln!(buf, "-----------------------").unwrap();
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for directive in directives {
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let trailer = " ";
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writeln!(buf, "{}{}- {}", directive.get_cmd(), trailer, directive.get_help()).unwrap();
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}
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writeln!(buf, "").unwrap();
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writeln!(buf, "Language-specific help for {}", lang.get_language_name()).unwrap();
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writeln!(buf, "-----------------------").unwrap();
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writeln!(buf, "{}", lang.custom_interpreter_directives_help()).unwrap();
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Some(buf)
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},
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"debug" => self.handle_debug(commands),
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"doc" => self.languages[self.current_language_index]
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.get_doc(&commands)
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.or(Some(format!("No docs implemented"))),
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e => self.languages[self.current_language_index]
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.handle_custom_interpreter_directives(&commands)
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.or(Some(format!("Unknown command: {}", e)))
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}
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}
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fn handle_debug(&mut self, commands: Vec<&str>) -> Option<String> {
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let passes = self.get_cur_language().get_passes();
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match commands.get(1) {
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Some(&"passes") => Some(
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passes.into_iter()
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.map(|desc| {
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if self.options.debug_passes.contains_key(&desc.name) {
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let color = "green";
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format!("*{}", desc.name.color(color))
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} else {
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desc.name
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}
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})
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.intersperse(format!(" -> "))
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.collect()),
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b @ Some(&"show") | b @ Some(&"hide") => {
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let show = b == Some(&"show");
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let debug_pass: String = match commands.get(2) {
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Some(s) => s.to_string(),
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None => return Some(format!("Must specify a stage to debug")),
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};
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let pass_opt = commands.get(3);
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if let Some(desc) = passes.iter().find(|desc| desc.name == debug_pass) {
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let mut opts = vec![];
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if let Some(opt) = pass_opt {
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opts.push(opt.to_string());
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}
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let msg = format!("{} debug for pass {}", if show { "Enabling" } else { "Disabling" }, debug_pass);
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if show {
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self.options.debug_passes.insert(desc.name.clone(), PassDebugOptionsDescriptor { opts });
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} else {
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self.options.debug_passes.remove(&desc.name);
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}
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Some(msg)
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} else {
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Some(format!("Couldn't find stage: {}", debug_pass))
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}
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},
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_ => Some(format!("Unknown debug command"))
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}
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}
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}
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/*
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pub fn compilation_sequence(llvm_code: LLVMCodeString, sourcefile: &str) {
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use std::process::Command;
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|
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@ -0,0 +1,365 @@
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use std::fmt::Write as FmtWrite;
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use std::io::{Read, Write};
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use std::fs::File;
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use colored::*;
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use itertools::Itertools;
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use language::{ProgrammingLanguageInterface, EvalOptions,
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PassDebugOptionsDescriptor};
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pub struct Repl {
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options: EvalOptions,
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languages: Vec<Box<ProgrammingLanguageInterface>>,
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current_language_index: usize,
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interpreter_directive_sigil: char,
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line_reader: ::linefeed::interface::Interface<::linefeed::terminal::DefaultTerminal>,
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}
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impl Repl {
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pub fn new(languages: Vec<Box<ProgrammingLanguageInterface>>, initial_index: usize) -> Repl {
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use linefeed::Interface;
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let i = if initial_index < languages.len() { initial_index } else { 0 };
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let line_reader = Interface::new("schala-repl").unwrap();
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Repl {
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options: Repl::get_options(),
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languages: languages,
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current_language_index: i,
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interpreter_directive_sigil: ':',
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line_reader
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}
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}
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fn get_cur_language(&self) -> &ProgrammingLanguageInterface {
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self.languages[self.current_language_index].as_ref()
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}
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fn get_options() -> EvalOptions {
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File::open(".schala_repl")
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.and_then(|mut file| {
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let mut contents = String::new();
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file.read_to_string(&mut contents)?;
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Ok(contents)
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})
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.and_then(|contents| {
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let options: EvalOptions = ::serde_json::from_str(&contents)?;
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Ok(options)
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}).unwrap_or(EvalOptions::default())
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}
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fn save_options(&self) {
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let ref options = self.options;
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let read = File::create(".schala_repl")
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.and_then(|mut file| {
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let buf = ::serde_json::to_string(options).unwrap();
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file.write_all(buf.as_bytes())
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});
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if let Err(err) = read {
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println!("Error saving .schala_repl file {}", err);
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}
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}
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pub fn run(&mut self) {
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use linefeed::ReadResult;
|
||||
|
||||
println!("Schala MetaInterpreter version {}", ::VERSION_STRING);
|
||||
println!("Type {}help for help with the REPL", self.interpreter_directive_sigil);
|
||||
|
||||
self.line_reader.load_history(".schala_history").unwrap_or(());
|
||||
|
||||
loop {
|
||||
let language_name = self.get_cur_language().get_language_name();
|
||||
let directives = self.get_directives();
|
||||
let tab_complete_handler = TabCompleteHandler::new(self.interpreter_directive_sigil, directives);
|
||||
self.line_reader.set_completer(::std::sync::Arc::new(tab_complete_handler));
|
||||
|
||||
let prompt_str = format!("{} >> ", language_name);
|
||||
self.line_reader.set_prompt(&prompt_str).unwrap();
|
||||
|
||||
match self.line_reader.read_line() {
|
||||
Err(e) => {
|
||||
println!("Terminal read error: {}", e);
|
||||
},
|
||||
Ok(ReadResult::Eof) => break,
|
||||
Ok(ReadResult::Signal(_)) => break,
|
||||
Ok(ReadResult::Input(ref input)) => {
|
||||
self.line_reader.add_history_unique(input.to_string());
|
||||
let output = match input.chars().nth(0) {
|
||||
Some(ch) if ch == self.interpreter_directive_sigil => self.handle_interpreter_directive(input),
|
||||
_ => Some(self.input_handler(input)),
|
||||
};
|
||||
if let Some(o) = output {
|
||||
println!("=> {}", o);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
self.line_reader.save_history(".schala_history").unwrap_or(());
|
||||
self.save_options();
|
||||
println!("Exiting...");
|
||||
}
|
||||
|
||||
fn input_handler(&mut self, input: &str) -> String {
|
||||
let ref mut language = self.languages[self.current_language_index];
|
||||
let interpreter_output = language.execute_pipeline(input, &self.options);
|
||||
interpreter_output.to_repl()
|
||||
}
|
||||
|
||||
fn get_directives(&self) -> CommandTree {
|
||||
let ref passes = self.get_cur_language().get_passes();
|
||||
|
||||
let passes_directives: Vec<CommandTree> = passes.iter()
|
||||
.map(|pass_descriptor| {
|
||||
let name = &pass_descriptor.name;
|
||||
if pass_descriptor.debug_options.len() == 0 {
|
||||
CommandTree::term(name, None)
|
||||
} else {
|
||||
let sub_opts: Vec<CommandTree> = pass_descriptor.debug_options.iter()
|
||||
.map(|o| CommandTree::term(o, None)).collect();
|
||||
CommandTree::NonTerminal(
|
||||
name.clone(),
|
||||
sub_opts,
|
||||
None
|
||||
)
|
||||
}
|
||||
}).collect();
|
||||
|
||||
CommandTree::Top(vec![
|
||||
CommandTree::term("exit", Some("exit the REPL")),
|
||||
CommandTree::term("quit", Some("exit the REPL")),
|
||||
CommandTree::term("help", Some("Print this help message")),
|
||||
CommandTree::NonTerminal(format!("debug"), vec![
|
||||
CommandTree::term("passes", None),
|
||||
CommandTree::NonTerminal(format!("show"), passes_directives.clone(), None),
|
||||
CommandTree::NonTerminal(format!("hide"), passes_directives.clone(), None),
|
||||
], Some(format!("show or hide pass info for a given pass, or display the names of all passes"))),
|
||||
CommandTree::NonTerminal(format!("lang"), vec![
|
||||
CommandTree::term("next", None),
|
||||
CommandTree::term("prev", None),
|
||||
CommandTree::NonTerminal(format!("go"), vec![], None)//TODO
|
||||
], Some(format!("switch between languages, or go directly to a langauge by name"))),
|
||||
CommandTree::term("doc", Some("Get language-specific help for an item")),
|
||||
])
|
||||
}
|
||||
|
||||
fn handle_interpreter_directive(&mut self, input: &str) -> Option<String> {
|
||||
let mut iter = input.chars();
|
||||
iter.next();
|
||||
let commands: Vec<&str> = iter
|
||||
.as_str()
|
||||
.split_whitespace()
|
||||
.collect();
|
||||
|
||||
let cmd: &str = match commands.get(0).clone() {
|
||||
None => return None,
|
||||
Some(s) => s
|
||||
};
|
||||
|
||||
match cmd {
|
||||
"exit" | "quit" => {
|
||||
self.save_options();
|
||||
::std::process::exit(0)
|
||||
},
|
||||
"lang" | "language" => match commands.get(1) {
|
||||
Some(&"show") => {
|
||||
let mut buf = String::new();
|
||||
for (i, lang) in self.languages.iter().enumerate() {
|
||||
write!(buf, "{}{}\n", if i == self.current_language_index { "* "} else { "" }, lang.get_language_name()).unwrap();
|
||||
}
|
||||
Some(buf)
|
||||
},
|
||||
Some(&"go") => match commands.get(2) {
|
||||
None => Some(format!("Must specify a language name")),
|
||||
Some(&desired_name) => {
|
||||
for (i, _) in self.languages.iter().enumerate() {
|
||||
let lang_name = self.languages[i].get_language_name();
|
||||
if lang_name.to_lowercase() == desired_name.to_lowercase() {
|
||||
self.current_language_index = i;
|
||||
return Some(format!("Switching to {}", self.languages[self.current_language_index].get_language_name()));
|
||||
}
|
||||
}
|
||||
Some(format!("Language {} not found", desired_name))
|
||||
}
|
||||
},
|
||||
Some(&"next") | Some(&"n") => {
|
||||
self.current_language_index = (self.current_language_index + 1) % self.languages.len();
|
||||
Some(format!("Switching to {}", self.languages[self.current_language_index].get_language_name()))
|
||||
},
|
||||
Some(&"previous") | Some(&"p") | Some(&"prev") => {
|
||||
self.current_language_index = if self.current_language_index == 0 { self.languages.len() - 1 } else { self.current_language_index - 1 };
|
||||
Some(format!("Switching to {}", self.languages[self.current_language_index].get_language_name()))
|
||||
},
|
||||
Some(e) => Some(format!("Bad `lang(uage)` argument: {}", e)),
|
||||
None => Some(format!("Valid arguments for `lang(uage)` are `show`, `next`|`n`, `previous`|`prev`|`n`"))
|
||||
},
|
||||
"help" => {
|
||||
let mut buf = String::new();
|
||||
let ref lang = self.languages[self.current_language_index];
|
||||
let directives = match self.get_directives() {
|
||||
CommandTree::Top(children) => children,
|
||||
_ => panic!("Top-level CommandTree not Top")
|
||||
};
|
||||
|
||||
writeln!(buf, "MetaInterpreter options").unwrap();
|
||||
writeln!(buf, "-----------------------").unwrap();
|
||||
|
||||
for directive in directives {
|
||||
let trailer = " ";
|
||||
writeln!(buf, "{}{}- {}", directive.get_cmd(), trailer, directive.get_help()).unwrap();
|
||||
}
|
||||
|
||||
writeln!(buf, "").unwrap();
|
||||
writeln!(buf, "Language-specific help for {}", lang.get_language_name()).unwrap();
|
||||
writeln!(buf, "-----------------------").unwrap();
|
||||
writeln!(buf, "{}", lang.custom_interpreter_directives_help()).unwrap();
|
||||
Some(buf)
|
||||
},
|
||||
"debug" => self.handle_debug(commands),
|
||||
"doc" => self.languages[self.current_language_index]
|
||||
.get_doc(&commands)
|
||||
.or(Some(format!("No docs implemented"))),
|
||||
e => self.languages[self.current_language_index]
|
||||
.handle_custom_interpreter_directives(&commands)
|
||||
.or(Some(format!("Unknown command: {}", e)))
|
||||
}
|
||||
}
|
||||
fn handle_debug(&mut self, commands: Vec<&str>) -> Option<String> {
|
||||
let passes = self.get_cur_language().get_passes();
|
||||
match commands.get(1) {
|
||||
Some(&"passes") => Some(
|
||||
passes.into_iter()
|
||||
.map(|desc| {
|
||||
if self.options.debug_passes.contains_key(&desc.name) {
|
||||
let color = "green";
|
||||
format!("*{}", desc.name.color(color))
|
||||
} else {
|
||||
desc.name
|
||||
}
|
||||
})
|
||||
.intersperse(format!(" -> "))
|
||||
.collect()),
|
||||
b @ Some(&"show") | b @ Some(&"hide") => {
|
||||
let show = b == Some(&"show");
|
||||
let debug_pass: String = match commands.get(2) {
|
||||
Some(s) => s.to_string(),
|
||||
None => return Some(format!("Must specify a stage to debug")),
|
||||
};
|
||||
let pass_opt = commands.get(3);
|
||||
if let Some(desc) = passes.iter().find(|desc| desc.name == debug_pass) {
|
||||
let mut opts = vec![];
|
||||
if let Some(opt) = pass_opt {
|
||||
opts.push(opt.to_string());
|
||||
}
|
||||
let msg = format!("{} debug for pass {}", if show { "Enabling" } else { "Disabling" }, debug_pass);
|
||||
if show {
|
||||
self.options.debug_passes.insert(desc.name.clone(), PassDebugOptionsDescriptor { opts });
|
||||
} else {
|
||||
self.options.debug_passes.remove(&desc.name);
|
||||
}
|
||||
Some(msg)
|
||||
} else {
|
||||
Some(format!("Couldn't find stage: {}", debug_pass))
|
||||
}
|
||||
},
|
||||
_ => Some(format!("Unknown debug command"))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
struct TabCompleteHandler {
|
||||
sigil: char,
|
||||
top_level_commands: CommandTree,
|
||||
}
|
||||
|
||||
use linefeed::complete::{Completion, Completer};
|
||||
use linefeed::terminal::Terminal;
|
||||
|
||||
impl TabCompleteHandler {
|
||||
fn new(sigil: char, top_level_commands: CommandTree) -> TabCompleteHandler {
|
||||
TabCompleteHandler {
|
||||
top_level_commands,
|
||||
sigil,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<T: Terminal> Completer<T> for TabCompleteHandler {
|
||||
fn complete(&self, word: &str, prompter: &::linefeed::prompter::Prompter<T>, start: usize, _end: usize) -> Option<Vec<Completion>> {
|
||||
let line = prompter.buffer();
|
||||
|
||||
if line.starts_with(&format!("{}", self.sigil)) {
|
||||
let mut words = line[1..(if start == 0 { 1 } else { start })].split_whitespace();
|
||||
let mut completions = Vec::new();
|
||||
let mut command_tree: Option<&CommandTree> = Some(&self.top_level_commands);
|
||||
|
||||
loop {
|
||||
match words.next() {
|
||||
None => {
|
||||
let top = match command_tree {
|
||||
Some(CommandTree::Top(_)) => true,
|
||||
_ => false
|
||||
};
|
||||
let word = if top { word.get(1..).unwrap() } else { word };
|
||||
for cmd in command_tree.map(|x| x.get_children()).unwrap_or(vec![]).into_iter() {
|
||||
if cmd.starts_with(word) {
|
||||
completions.push(Completion {
|
||||
completion: format!("{}{}", if top { ":" } else { "" }, cmd),
|
||||
display: Some(cmd.clone()),
|
||||
suffix: ::linefeed::complete::Suffix::Some(' ')
|
||||
})
|
||||
}
|
||||
}
|
||||
break;
|
||||
},
|
||||
Some(s) => {
|
||||
let new_ptr: Option<&CommandTree> = command_tree.and_then(|cm| match cm {
|
||||
CommandTree::Top(children) => children.iter().find(|c| c.get_cmd() == s),
|
||||
CommandTree::NonTerminal(_, children, _) => children.iter().find(|c| c.get_cmd() == s),
|
||||
CommandTree::Terminal(_, _) => None,
|
||||
});
|
||||
command_tree = new_ptr;
|
||||
}
|
||||
}
|
||||
}
|
||||
Some(completions)
|
||||
} else {
|
||||
None
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Clone)]
|
||||
enum CommandTree {
|
||||
Terminal(String, Option<String>),
|
||||
NonTerminal(String, Vec<CommandTree>, Option<String>),
|
||||
Top(Vec<CommandTree>),
|
||||
}
|
||||
|
||||
impl CommandTree {
|
||||
fn term(s: &str, help: Option<&str>) -> CommandTree {
|
||||
CommandTree::Terminal(s.to_string(), help.map(|x| x.to_string()))
|
||||
}
|
||||
fn get_cmd(&self) -> String {
|
||||
match self {
|
||||
CommandTree::Terminal(s, _) => s.to_string(),
|
||||
CommandTree::NonTerminal(s, _, _) => s.to_string(),
|
||||
CommandTree::Top(_) => "".to_string(),
|
||||
}
|
||||
}
|
||||
fn get_help(&self) -> String {
|
||||
match self {
|
||||
CommandTree::Terminal(_, h) => h.as_ref().map(|h| h.clone()).unwrap_or(format!("")),
|
||||
CommandTree::NonTerminal(_, _, h) => h.as_ref().map(|h| h.clone()).unwrap_or(format!("")),
|
||||
CommandTree::Top(_) => "".to_string(),
|
||||
}
|
||||
}
|
||||
fn get_children(&self) -> Vec<String> {
|
||||
match self {
|
||||
CommandTree::Terminal(_, _) => vec![],
|
||||
CommandTree::NonTerminal(_, children, _) => children.iter().map(|x| x.get_cmd()).collect(),
|
||||
CommandTree::Top(children) => children.iter().map(|x| x.get_cmd()).collect(),
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue