use std::fs::File; use std::io::prelude::*; use std::path::Path; use std::collections::HashMap; use toml::{Value as Toml, self}; 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, /// Which themes to use for code highlighting. See Readme for supported themes pub highlight_theme: Option, /// Description of the site pub description: Option, /// The language used in the site. Defaults to "en" pub language_code: Option, /// Whether to generate RSS, defaults to false pub generate_rss: Option, /// Whether to generate tags and individual tag pages if some pages have them. Defaults to true pub generate_tags_pages: Option, /// Whether to generate categories and individual tag categories if some pages have them. Defaults to true pub generate_categories_pages: Option, /// 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, /// All user params set in [extra] in the config pub extra: Option>, } 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 { 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.generate_tags_pages, false); set_default!(config.generate_categories_pages, false); set_default!(config.insert_anchor_links, 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>(path: P) -> Result { 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 { if self.base_url.ends_with('/') && path.starts_with('/') { format!("{}{}", self.base_url, &path[1..]) } else if self.base_url.ends_with('/') { format!("{}{}", self.base_url, path) } else { format!("{}/{}", self.base_url, path) } } } /// 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), generate_tags_pages: Some(true), generate_categories_pages: Some(true), insert_anchor_links: 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"); } }