zola/components/config/src/lib.rs
2017-07-06 22:19:50 +09:00

224 lines
7 KiB
Rust

#[macro_use]
extern crate serde_derive;
extern crate toml;
#[macro_use]
extern crate errors;
extern crate rendering;
use std::collections::HashMap;
use std::fs::File;
use std::io::prelude::*;
use std::path::Path;
use toml::{Value as Toml};
use errors::{Result, ResultExt};
use rendering::highlighting::THEME_SET;
#[derive(Debug, PartialEq, Serialize, Deserialize)]
pub struct Config {
/// Title of the site
pub title: String,
/// Base URL of the site
pub base_url: String,
/// Whether to highlight all code blocks found in markdown files. Defaults to false
pub highlight_code: Option<bool>,
/// Which themes to use for code highlighting. See Readme for supported themes
pub highlight_theme: Option<String>,
/// Description of the site
pub description: Option<String>,
/// The language used in the site. Defaults to "en"
pub language_code: Option<String>,
/// Whether to generate RSS. Defaults to false
pub generate_rss: Option<bool>,
/// The number of articles to include in the RSS feed. Defaults to unlimited
pub rss_limit: Option<usize>,
/// Whether to generate tags and individual tag pages if some pages have them. Defaults to true
pub generate_tags_pages: Option<bool>,
/// Whether to generate categories and individual tag categories if some pages have them. Defaults to true
pub generate_categories_pages: Option<bool>,
/// Whether to insert a link for each header like in Github READMEs. Defaults to false
/// The default template can be overridden by creating a `anchor-link.html` template and CSS will need to be
/// written if you turn that on.
pub insert_anchor_links: Option<bool>,
/// Whether to compile the `sass` directory and output the css files into the static folder
pub compile_sass: Option<bool>,
/// All user params set in [extra] in the config
pub extra: Option<HashMap<String, Toml>>,
}
macro_rules! set_default {
($key: expr, $default: expr) => {
if $key.is_none() {
$key = Some($default);
}
}
}
impl Config {
/// Parses a string containing TOML to our Config struct
/// Any extra parameter will end up in the extra field
pub fn parse(content: &str) -> Result<Config> {
let mut config: Config = match toml::from_str(content) {
Ok(c) => c,
Err(e) => bail!(e)
};
set_default!(config.language_code, "en".to_string());
set_default!(config.highlight_code, false);
set_default!(config.generate_rss, false);
set_default!(config.rss_limit, 20);
set_default!(config.generate_tags_pages, false);
set_default!(config.generate_categories_pages, false);
set_default!(config.insert_anchor_links, false);
set_default!(config.compile_sass, false);
match config.highlight_theme {
Some(ref t) => {
if !THEME_SET.themes.contains_key(t) {
bail!("Theme {} not available", t)
}
}
None => config.highlight_theme = Some("base16-ocean-dark".to_string())
};
Ok(config)
}
/// Parses a config file from the given path
pub fn from_file<P: AsRef<Path>>(path: P) -> Result<Config> {
let mut content = String::new();
File::open(path)
.chain_err(|| "No `config.toml` file found. Are you in the right directory?")?
.read_to_string(&mut content)?;
Config::parse(&content)
}
/// Makes a url, taking into account that the base url might have a trailing slash
pub fn make_permalink(&self, path: &str) -> String {
let trailing_bit = if path.ends_with('/') { "" } else { "/" };
// Index section with a base url that has a trailing slash
if self.base_url.ends_with('/') && path == "/" {
self.base_url.clone()
} else if path == "/" {
// index section with a base url that doesn't have a trailing slash
format!("{}/", self.base_url)
} else if self.base_url.ends_with('/') && path.starts_with('/') {
format!("{}{}{}", self.base_url, &path[1..], trailing_bit)
} else if self.base_url.ends_with('/') {
format!("{}{}{}", self.base_url, path, trailing_bit)
} else {
format!("{}/{}{}", self.base_url, path, trailing_bit)
}
}
}
/// Exists only for testing purposes
#[doc(hidden)]
impl Default for Config {
fn default() -> Config {
Config {
title: "".to_string(),
base_url: "http://a-website.com/".to_string(),
highlight_code: Some(true),
highlight_theme: Some("base16-ocean-dark".to_string()),
description: None,
language_code: Some("en".to_string()),
generate_rss: Some(false),
rss_limit: Some(10000),
generate_tags_pages: Some(true),
generate_categories_pages: Some(true),
insert_anchor_links: Some(false),
compile_sass: Some(false),
extra: None,
}
}
}
/// Get and parse the config.
/// If it doesn't succeed, exit
pub fn get_config(path: &Path, filename: &str) -> Config {
match Config::from_file(path.join(filename)) {
Ok(c) => c,
Err(e) => {
println!("Failed to load {}", filename);
println!("Error: {}", e);
::std::process::exit(1);
}
}
}
#[cfg(test)]
mod tests {
use super::{Config};
#[test]
fn can_import_valid_config() {
let config = r#"
title = "My site"
base_url = "https://replace-this-with-your-url.com"
"#;
let config = Config::parse(config).unwrap();
assert_eq!(config.title, "My site".to_string());
}
#[test]
fn errors_when_invalid_type() {
let config = r#"
title = 1
base_url = "https://replace-this-with-your-url.com"
"#;
let config = Config::parse(config);
assert!(config.is_err());
}
#[test]
fn errors_when_missing_required_field() {
// base_url is required
let config = r#"
title = ""
"#;
let config = Config::parse(config);
assert!(config.is_err());
}
#[test]
fn can_add_extra_values() {
let config = r#"
title = "My site"
base_url = "https://replace-this-with-your-url.com"
[extra]
hello = "world"
"#;
let config = Config::parse(config);
assert!(config.is_ok());
assert_eq!(config.unwrap().extra.unwrap().get("hello").unwrap().as_str().unwrap(), "world");
}
#[test]
fn can_make_url_with_non_trailing_slash_base_url() {
let mut config = Config::default();
config.base_url = "http://vincent.is".to_string();
assert_eq!(config.make_permalink("hello"), "http://vincent.is/hello/");
}
#[test]
fn can_make_url_with_trailing_slash_path() {
let mut config = Config::default();
config.base_url = "http://vincent.is/".to_string();
assert_eq!(config.make_permalink("/hello"), "http://vincent.is/hello/");
}
}