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#![cfg_attr(feature = "cargo-clippy", allow(unused_parens))] extern crate serde; #[macro_use] extern crate serde_derive; #[cfg(feature = "serde-json")] extern crate serde_json; extern crate toml; use std::env; use std::fs; use std::path::{Path, PathBuf}; mod error; mod escaping; pub use error::{Error, Result}; pub use escaping::MarkupDisplay; pub mod filters; pub struct Config { pub dirs: Vec<PathBuf>, } impl Config { pub fn new() -> Config { let root = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap()); let filename = root.join(CONFIG_FILE_NAME); if filename.exists() { Self::from_str(&fs::read_to_string(&filename) .expect(&format!("unable to read {}", filename.to_str().unwrap()))) } else { Self::from_str("") } } pub fn from_str(s: &str) -> Self { let root = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap()); let default = vec![root.join("templates")]; let raw: RawConfig = toml::from_str(&s).expect(&format!("invalid TOML in {}", CONFIG_FILE_NAME)); let dirs = match raw.general { Some(General { dirs: Some(dirs) }) => { dirs.into_iter().map(|dir| root.join(dir)).collect() } Some(General { dirs: None }) | None => default, }; Self { dirs } } pub fn find_template(&self, path: &str, start_at: Option<&Path>) -> PathBuf { if let Some(root) = start_at { let relative = root.with_file_name(path); if relative.exists() { return relative.to_owned(); } } for dir in &self.dirs { let rooted = dir.join(path); if rooted.exists() { return rooted; } } panic!( "template {:?} not found in directories {:?}", path, self.dirs ) } } #[derive(Deserialize)] struct RawConfig { general: Option<General>, } #[derive(Deserialize)] struct General { dirs: Option<Vec<String>>, } static CONFIG_FILE_NAME: &str = "askama.toml"; #[cfg(test)] mod tests { use super::Config; use std::env; use std::path::{Path, PathBuf}; #[test] fn test_default_config() { let mut root = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap()); root.push("templates"); let config = Config::from_str(""); assert_eq!(config.dirs, vec![root]); } #[test] fn test_config_dirs() { let mut root = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap()); root.push("tpl"); let config = Config::from_str("[general]\ndirs = [\"tpl\"]"); assert_eq!(config.dirs, vec![root]); } fn assert_eq_rooted(actual: &Path, expected: &str) { let mut root = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap()); root.push("templates"); let mut inner = PathBuf::new(); inner.push(expected); assert_eq!(actual.strip_prefix(root).unwrap(), inner); } #[test] fn find_absolute() { let config = Config::new(); let root = config.find_template("a.html", None); let path = config.find_template("sub/b.html", Some(&root)); assert_eq_rooted(&path, "sub/b.html"); } #[test] #[should_panic] fn find_relative_nonexistent() { let config = Config::new(); let root = config.find_template("a.html", None); config.find_template("b.html", Some(&root)); } #[test] fn find_relative() { let config = Config::new(); let root = config.find_template("sub/b.html", None); let path = config.find_template("c.html", Some(&root)); assert_eq_rooted(&path, "sub/c.html"); } #[test] fn find_relative_sub() { let config = Config::new(); let root = config.find_template("sub/b.html", None); let path = config.find_template("sub1/d.html", Some(&root)); assert_eq_rooted(&path, "sub/sub1/d.html"); } }