zola/src/cmd/serve.rs

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// Contains an embedded version of livereload-js
//
// Copyright (c) 2010-2012 Andrey Tarantsov
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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use std::env;
use std::fs::remove_dir_all;
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use std::path::Path;
use std::sync::mpsc::channel;
use std::time::{Instant, Duration};
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use std::thread;
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use chrono::prelude::*;
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use iron::{Iron, Request, IronResult, Response, status};
use mount::Mount;
use staticfile::Static;
use notify::{Watcher, RecursiveMode, watcher};
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use ws::{WebSocket, Sender, Message};
use ctrlc;
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use site::Site;
use errors::{Result, ResultExt};
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use utils::fs::copy_file;
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use console;
use rebuild;
#[derive(Debug, PartialEq)]
enum ChangeKind {
Content,
Templates,
StaticFiles,
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Sass,
Config,
}
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// Uglified using uglifyjs
// Also, commenting out the lines 330-340 (containing `e instanceof ProtocolError`) was needed
// as it seems their build didn't work well and didn't include ProtocolError so it would error on
// errors
const LIVE_RELOAD: &'static str = include_str!("livereload.js");
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fn livereload_handler(_: &mut Request) -> IronResult<Response> {
Ok(Response::with((status::Ok, LIVE_RELOAD.to_string())))
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}
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fn rebuild_done_handling(broadcaster: &Sender, res: Result<()>, reload_path: &str) {
match res {
Ok(_) => {
broadcaster.send(format!(r#"
{{
"command": "reload",
"path": "{}",
"originalPath": "",
"liveCSS": true,
"liveImg": true,
"protocol": ["http://livereload.com/protocols/official-7"]
}}"#, reload_path)
).unwrap();
},
Err(e) => console::unravel_errors("Failed to build the site", &e)
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}
}
fn create_new_site(interface: &str, port: &str, output_dir: &str, base_url: &str, config_file: &str) -> Result<(Site, String)> {
let mut site = Site::new(env::current_dir().unwrap(), config_file)?;
let base_address = format!("{}:{}", base_url, port);
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let address = format!("{}:{}", interface, port);
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site.config.base_url = if site.config.base_url.ends_with('/') {
format!("http://{}/", base_address)
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} else {
format!("http://{}", base_address)
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};
site.set_output_path(output_dir);
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site.load()?;
site.enable_live_reload();
console::notify_site_size(&site);
console::warn_about_ignored_pages(&site);
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site.build()?;
Ok((site, address))
}
pub fn serve(interface: &str, port: &str, output_dir: &str, base_url: &str, config_file: &str) -> Result<()> {
let start = Instant::now();
let (mut site, address) = create_new_site(interface, port, output_dir, base_url, config_file)?;
console::report_elapsed_time(start);
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// Setup watchers
let mut watching_static = false;
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let (tx, rx) = channel();
let mut watcher = watcher(tx, Duration::from_secs(2)).unwrap();
watcher.watch("content/", RecursiveMode::Recursive)
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.chain_err(|| "Can't watch the `content` folder. Does it exist?")?;
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watcher.watch("templates/", RecursiveMode::Recursive)
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.chain_err(|| "Can't watch the `templates` folder. Does it exist?")?;
watcher.watch(config_file, RecursiveMode::Recursive)
.chain_err(|| "Can't watch the `config` file. Does it exist?")?;
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if Path::new("static").exists() {
watching_static = true;
watcher.watch("static/", RecursiveMode::Recursive)
.chain_err(|| "Can't watch the `static` folder. Does it exist?")?;
}
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// Sass support is optional so don't make it an error to no have a sass folder
let _ = watcher.watch("sass/", RecursiveMode::Recursive);
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let ws_address = format!("{}:{}", interface, "1112");
// Start a webserver that serves the `output_dir` directory
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let mut mount = Mount::new();
mount.mount("/", Static::new(Path::new(output_dir)));
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mount.mount("/livereload.js", livereload_handler);
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// Starts with a _ to not trigger the unused lint
// we need to assign to a variable otherwise it will block
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let _iron = Iron::new(mount).http(address.as_str())
.chain_err(|| "Can't start the webserver")?;
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// The websocket for livereload
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let ws_server = WebSocket::new(|output: Sender| {
move |msg: Message| {
if msg.into_text().unwrap().contains("\"hello\"") {
return output.send(Message::text(r#"
{
"command": "hello",
"protocols": [ "http://livereload.com/protocols/official-7" ],
"serverName": "Gutenberg"
}
"#));
}
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Ok(())
}
}).unwrap();
let broadcaster = ws_server.broadcaster();
thread::spawn(move || {
ws_server.listen(&*ws_address).unwrap();
});
let pwd = format!("{}", env::current_dir().unwrap().display());
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let mut watchers = vec!["content", "templates", "config.toml"];
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if watching_static {
watchers.push("static");
}
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if site.config.compile_sass {
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watchers.push("sass");
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}
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println!("Listening for changes in {}/{{{}}}", pwd, watchers.join(", "));
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println!("Web server is available at http://{}", address);
println!("Press Ctrl+C to stop\n");
// Delete the output folder on ctrl+C
let output_path = Path::new(output_dir).to_path_buf();
ctrlc::set_handler(move || {
remove_dir_all(&output_path).expect("Failed to delete output directory");
::std::process::exit(0);
}).expect("Error setting Ctrl-C handler");
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use notify::DebouncedEvent::*;
loop {
match rx.recv() {
Ok(event) => {
match event {
Create(path) |
Write(path) |
Remove(path) |
Rename(_, path) => {
if is_temp_file(&path) || path.is_dir() {
continue;
}
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println!("Change detected @ {}", Local::now().format("%Y-%m-%d %H:%M:%S").to_string());
let start = Instant::now();
match detect_change_kind(&pwd, &path) {
(ChangeKind::Content, _) => {
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console::info(&format!("-> Content changed {}", path.display()));
// Force refresh
rebuild_done_handling(&broadcaster, rebuild::after_content_change(&mut site, &path), "/x.js");
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},
(ChangeKind::Templates, _) => {
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console::info(&format!("-> Template changed {}", path.display()));
// Force refresh
rebuild_done_handling(&broadcaster, rebuild::after_template_change(&mut site, &path), "/x.js");
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},
(ChangeKind::StaticFiles, p) => {
if path.is_file() {
console::info(&format!("-> Static file changes detected {}", path.display()));
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rebuild_done_handling(&broadcaster, copy_file(&path, &site.output_path, &site.static_path), &p);
}
},
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(ChangeKind::Sass, p) => {
console::info(&format!("-> Sass file changed {}", path.display()));
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rebuild_done_handling(&broadcaster, site.compile_sass(&site.base_path), &p);
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},
(ChangeKind::Config, _) => {
console::info(&format!("-> Config changed. The whole site will be reloaded. The browser needs to be refreshed to make the changes visible."));
site = create_new_site(interface, port, output_dir, base_url, config_file).unwrap().0;
}
};
console::report_elapsed_time(start);
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}
_ => {}
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}
},
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Err(e) => console::error(&format!("Watch error: {:?}", e)),
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};
}
}
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/// Returns whether the path we received corresponds to a temp file created
/// by an editor or the OS
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fn is_temp_file(path: &Path) -> bool {
let ext = path.extension();
match ext {
Some(ex) => match ex.to_str().unwrap() {
"swp" | "swx" | "tmp" | ".DS_STORE" => true,
// jetbrains IDE
x if x.ends_with("jb_old___") => true,
x if x.ends_with("jb_tmp___") => true,
x if x.ends_with("jb_bak___") => true,
// vim
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x if x.ends_with('~') => true,
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_ => {
if let Some(filename) = path.file_stem() {
// emacs
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filename.to_str().unwrap().starts_with('#')
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} else {
false
}
}
},
None => {
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path.ends_with(".DS_STORE")
},
}
}
/// Detect what changed from the given path so we have an idea what needs
/// to be reloaded
fn detect_change_kind(pwd: &str, path: &Path) -> (ChangeKind, String) {
let path_str = format!("{}", path.display())
.replace(pwd, "")
.replace("\\", "/");
let change_kind = if path_str.starts_with("/templates") {
ChangeKind::Templates
} else if path_str.starts_with("/content") {
ChangeKind::Content
} else if path_str.starts_with("/static") {
ChangeKind::StaticFiles
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} else if path_str.starts_with("/sass") {
ChangeKind::Sass
} else if path_str == "/config.toml" {
ChangeKind::Config
} else {
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unreachable!("Got a change in an unexpected path: {}", path_str)
};
(change_kind, path_str)
}
#[cfg(test)]
mod tests {
use std::path::Path;
use super::{is_temp_file, detect_change_kind, ChangeKind};
#[test]
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fn can_recognize_temp_files() {
let test_cases = vec![
Path::new("hello.swp"),
Path::new("hello.swx"),
Path::new(".DS_STORE"),
Path::new("hello.tmp"),
Path::new("hello.html.__jb_old___"),
Path::new("hello.html.__jb_tmp___"),
Path::new("hello.html.__jb_bak___"),
Path::new("hello.html~"),
Path::new("#hello.html"),
];
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for t in test_cases {
assert!(is_temp_file(&t));
}
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}
#[test]
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fn can_detect_kind_of_changes() {
let test_cases = vec![
(
(ChangeKind::Templates, "/templates/hello.html".to_string()),
"/home/vincent/site", Path::new("/home/vincent/site/templates/hello.html")
),
(
(ChangeKind::StaticFiles, "/static/site.css".to_string()),
"/home/vincent/site", Path::new("/home/vincent/site/static/site.css")
),
(
(ChangeKind::Content, "/content/posts/hello.md".to_string()),
"/home/vincent/site", Path::new("/home/vincent/site/content/posts/hello.md")
),
(
(ChangeKind::Sass, "/sass/print.scss".to_string()),
"/home/vincent/site", Path::new("/home/vincent/site/sass/print.scss")
),
(
(ChangeKind::Config, "/config.toml".to_string()),
"/home/vincent/site", Path::new("/home/vincent/site/config.toml")
),
];
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for (expected, pwd, path) in test_cases {
assert_eq!(expected, detect_change_kind(&pwd, &path));
}
}
}