diff options
Diffstat (limited to 'dhall/src/semantics/resolve')
-rw-r--r-- | dhall/src/semantics/resolve/cache.rs | 86 |
1 files changed, 55 insertions, 31 deletions
diff --git a/dhall/src/semantics/resolve/cache.rs b/dhall/src/semantics/resolve/cache.rs index 8ac523b..ebd89be 100644 --- a/dhall/src/semantics/resolve/cache.rs +++ b/dhall/src/semantics/resolve/cache.rs @@ -8,8 +8,8 @@ use crate::semantics::{Import, TypedHir}; use crate::syntax::Hash; use crate::syntax::{binary, Expr}; use crate::Parsed; -use std::fs::File; use std::env::VarError; +use std::fs::File; #[cfg(unix)] const ALTERNATE_ENV_VAR: &str = "HOME"; @@ -17,21 +17,27 @@ const ALTERNATE_ENV_VAR: &str = "HOME"; #[cfg(windows)] const ALTERNATE_ENV_VAR: &str = "LOCALAPPDATA"; -fn alternate_env_var_cache_dir(provider: impl Fn(&str) -> Result<String, VarError>) -> Option<PathBuf> { +fn alternate_env_var_cache_dir( + provider: impl Fn(&str) -> Result<String, VarError>, +) -> Option<PathBuf> { provider(ALTERNATE_ENV_VAR) .map(PathBuf::from) .map(|env_dir| env_dir.join(".cache").join("dhall")) .ok() } -fn env_var_cache_dir(provider: impl Fn(&str) -> Result<String, VarError>) -> Option<PathBuf> { +fn env_var_cache_dir( + provider: impl Fn(&str) -> Result<String, VarError>, +) -> Option<PathBuf> { provider("XDG_CACHE_HOME") .map(PathBuf::from) .map(|cache_home| cache_home.join("dhall")) .ok() } -fn load_cache_dir(provider: impl Fn(&str) -> Result<String, VarError> + Copy) -> Result<PathBuf, CacheError> { +fn load_cache_dir( + provider: impl Fn(&str) -> Result<String, VarError> + Copy, +) -> Result<PathBuf, CacheError> { env_var_cache_dir(provider) .or_else(|| alternate_env_var_cache_dir(provider)) .ok_or(CacheError::MissingConfiguration) @@ -43,7 +49,9 @@ pub struct Cache { } impl Cache { - fn new_with_provider(provider: impl Fn(&str) -> Result<String, VarError> + Copy) -> Cache { + fn new_with_provider( + provider: impl Fn(&str) -> Result<String, VarError> + Copy, + ) -> Cache { // Should warn that we can't initialize cache on error let cache_dir = load_cache_dir(provider).and_then(|path| { if !path.exists() { @@ -164,18 +172,18 @@ impl AsRef<[u8]> for Hash { } } - #[cfg(test)] mod test { use super::*; - use std::env::temp_dir; - use rand::Rng; use rand::distributions::Alphanumeric; + use rand::Rng; + use std::env::temp_dir; #[cfg(unix)] #[test] fn alternate_env_var_cache_dir_should_result_unix_folder_path() { - let actual = alternate_env_var_cache_dir(|_| Ok("/home/user".to_string())); + let actual = + alternate_env_var_cache_dir(|_| Ok("/home/user".to_string())); assert_eq!(actual, Some(PathBuf::from("/home/user/.cache/dhall"))); } @@ -187,8 +195,13 @@ mod test { #[test] fn env_var_cache_dir_should_result_xdg_cache_home() { - let actual = env_var_cache_dir(|_| Ok("/home/user/custom/path/for/cache".to_string())); - assert_eq!(actual, Some(PathBuf::from("/home/user/custom/path/for/cache/dhall"))); + let actual = env_var_cache_dir(|_| { + Ok("/home/user/custom/path/for/cache".to_string()) + }); + assert_eq!( + actual, + Some(PathBuf::from("/home/user/custom/path/for/cache/dhall")) + ); } #[test] @@ -199,31 +212,30 @@ mod test { #[test] fn load_cache_dir_should_result_xdg_cache_first() { - let actual = load_cache_dir( - |var| match var { - "XDG_CACHE_HOME" => Ok("/home/user/custom".to_string()), - _ => Err(VarError::NotPresent) - } - ); + let actual = load_cache_dir(|var| match var { + "XDG_CACHE_HOME" => Ok("/home/user/custom".to_string()), + _ => Err(VarError::NotPresent), + }); assert_eq!(actual.unwrap(), PathBuf::from("/home/user/custom/dhall")); } #[cfg(unix)] #[test] fn load_cache_dir_should_result_alternate() { - let actual = load_cache_dir(|var| - match var { - ALTERNATE_ENV_VAR => Ok("/home/user".to_string()), - _ => Err(VarError::NotPresent) - } - ); + let actual = load_cache_dir(|var| match var { + ALTERNATE_ENV_VAR => Ok("/home/user".to_string()), + _ => Err(VarError::NotPresent), + }); assert_eq!(actual.unwrap(), PathBuf::from("/home/user/.cache/dhall")); } #[test] fn load_cache_dir_should_result_none() { let actual = load_cache_dir(|_| Err(VarError::NotPresent)); - assert!(matches!(actual.unwrap_err(), CacheError::MissingConfiguration)); + assert!(matches!( + actual.unwrap_err(), + CacheError::MissingConfiguration + )); } #[test] @@ -236,8 +248,15 @@ mod test { std::fs::create_dir_all(dir.as_path()).unwrap(); - let actual = Cache::new_with_provider(|_| Ok(dir.clone().to_str().map(String::from).unwrap())); - assert_eq!(actual, Cache{ cache_dir: Some(dir.join("dhall"))}); + let actual = Cache::new_with_provider(|_| { + Ok(dir.clone().to_str().map(String::from).unwrap()) + }); + assert_eq!( + actual, + Cache { + cache_dir: Some(dir.join("dhall")) + } + ); assert!(dir.join("dhall").exists()); std::fs::remove_dir_all(dir.as_path()).unwrap(); } @@ -255,10 +274,15 @@ mod test { assert!(dir.join("dhall").exists()); - let actual = Cache::new_with_provider(|_| Ok(dir.clone().to_str().map(String::from).unwrap())); - assert_eq!(actual, Cache{ cache_dir: Some(dir.join("dhall"))}); + let actual = Cache::new_with_provider(|_| { + Ok(dir.clone().to_str().map(String::from).unwrap()) + }); + assert_eq!( + actual, + Cache { + cache_dir: Some(dir.join("dhall")) + } + ); std::fs::remove_dir_all(dir.as_path()).unwrap(); } - - -}
\ No newline at end of file +} |