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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Implementation of the `build` subcommand, used to compile a book.
use std::os;
use std::io;
use std::io::{fs, File, BufferedWriter, TempDir, IoResult};
use subcommand::Subcommand;
use term::Term;
use error::{Error, CliResult, CommandResult};
use book;
use book::{Book, BookItem};
use css;
use regex::Regex;
use rustdoc;
struct Build;
pub fn parse_cmd(name: &str) -> Option<Box<Subcommand>> {
if name == "build" {
Some(box Build as Box<Subcommand>)
} else {
None
}
}
fn write_toc(book: &Book, path_to_root: &Path, out: &mut Writer) -> IoResult<()> {
fn walk_items(items: &[BookItem],
section: &str,
path_to_root: &Path,
out: &mut Writer) -> IoResult<()> {
for (i, item) in items.iter().enumerate() {
try!(walk_item(item, &format!("{}{}.", section, i + 1)[], path_to_root, out));
}
Ok(())
}
fn walk_item(item: &BookItem,
section: &str,
path_to_root: &Path,
out: &mut Writer) -> IoResult<()> {
try!(writeln!(out, "<li><a href='{}'><b>{}</b> {}</a>",
path_to_root.join(item.path.with_extension("html")).display(),
section,
item.title));
if !item.children.is_empty() {
try!(writeln!(out, "<ul class='section'>"));
let _ = walk_items(&item.children[], section, path_to_root, out);
try!(writeln!(out, "</ul>"));
}
try!(writeln!(out, "</li>"));
Ok(())
}
try!(writeln!(out, "<div id='toc'>"));
try!(writeln!(out, "<ul class='chapter'>"));
try!(walk_items(&book.chapters[], "", path_to_root, out));
try!(writeln!(out, "</ul>"));
try!(writeln!(out, "</div>"));
Ok(())
}
fn render(book: &Book, tgt: &Path) -> CliResult<()> {
let tmp = TempDir::new("rust-book")
.ok()
// FIXME: lift to Result instead
.expect("could not create temporary directory");
for (section, item) in book.iter() {
println!("{} {}", section, item.title);
let out_path = tgt.join(item.path.dirname());
let regex = r"\[(?P<title>[^]]*)\]\((?P<url_stem>[^)]*)\.(?P<ext>md|markdown)\)";
let md_urls = Regex::new(regex).unwrap();
let src;
if os::args().len() < 3 {
src = os::getcwd().unwrap().clone();
} else {
src = Path::new(os::args()[2].clone());
}
// preprocess the markdown, rerouting markdown references to html references
let markdown_data = try!(File::open(&src.join(&item.path)).read_to_string());
let preprocessed_path = tmp.path().join(item.path.filename().unwrap());
{
let urls = md_urls.replace_all(&markdown_data[], "[$title]($url_stem.html)");
try!(File::create(&preprocessed_path)
.write_str(&urls[]));
}
// write the prelude to a temporary HTML file for rustdoc inclusion
let prelude = tmp.path().join("prelude.html");
{
let mut toc = BufferedWriter::new(try!(File::create(&prelude)));
let _ = write_toc(book, &item.path_to_root, &mut toc);
try!(writeln!(&mut toc, "<div id='page-wrapper'>"));
try!(writeln!(&mut toc, "<div id='page'>"));
}
// write the postlude to a temporary HTML file for rustdoc inclusion
let postlude = tmp.path().join("postlude.html");
{
let mut toc = BufferedWriter::new(try!(File::create(&postlude)));
try!(writeln!(&mut toc, "</div></div>"));
}
try!(fs::mkdir_recursive(&out_path, io::USER_DIR));
let rustdoc_args: &[String] = &[
"".to_string(),
preprocessed_path.display().to_string(),
format!("-o{}", out_path.display()),
format!("--html-before-content={}", prelude.display()),
format!("--html-after-content={}", postlude.display()),
format!("--markdown-css={}", item.path_to_root.join("rust-book.css").display()),
"--markdown-no-toc".to_string(),
];
let output_result = rustdoc::main_args(rustdoc_args);
if output_result != 0 {
let message = format!("Could not execute `rustdoc` with {:?}: {}",
rustdoc_args, output_result);
return Err(box message as Box<Error>);
}
}
// create index.html from the root README
try!(fs::copy(&tgt.join("README.html"), &tgt.join("index.html")));
Ok(())
}
impl Subcommand for Build {
fn parse_args(&mut self, _: &[String]) -> CliResult<()> {
Ok(())
}
fn usage(&self) {}
fn execute(&mut self, term: &mut Term) -> CommandResult<()> {
let cwd = os::getcwd().unwrap();
let src;
let tgt;
if os::args().len() < 3 {
src = cwd.clone();
} else {
src = Path::new(os::args()[2].clone());
}
if os::args().len() < 4 {
tgt = cwd.join("_book");
} else {
tgt = Path::new(os::args()[3].clone());
}
let _ = fs::mkdir(&tgt, io::USER_DIR); // FIXME: handle errors
// FIXME: handle errors
let _ = File::create(&tgt.join("rust-book.css")).write_str(css::STYLE);
let summary = File::open(&src.join("SUMMARY.md"));
match book::parse_summary(summary, &src) {
Ok(book) => {
// execute rustdoc on the whole book
try!(render(&book, &tgt).map_err(|err| {
term.err(&format!("error: {}", err.description())[]);
err.detail().map(|detail| {
term.err(&format!("detail: {}", detail)[]);
});
err
}))
}
Err(errors) => {
for err in errors.into_iter() {
term.err(&err[]);
}
}
}
Ok(()) // lol
}
}
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