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-rw-r--r--dhall/src/semantics/resolve/cache.rs86
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
+}