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59 lines
1.5 KiB
Rust
59 lines
1.5 KiB
Rust
pub use which::which;
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use std::{
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path::{Path, PathBuf},
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sync::RwLock,
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};
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static CWD: RwLock<Option<PathBuf>> = RwLock::new(None);
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// Get the current working directory.
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// This information is managed internally as the call to std::env::current_dir
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// might fail if the cwd has been deleted.
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pub fn current_working_dir() -> PathBuf {
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if let Some(path) = &*CWD.read().unwrap() {
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return path.clone();
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}
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let path = std::env::current_dir()
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.map(crate::path::normalize)
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.expect("Couldn't determine current working directory");
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let mut cwd = CWD.write().unwrap();
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*cwd = Some(path.clone());
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path
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}
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pub fn set_current_working_dir(path: impl AsRef<Path>) -> std::io::Result<()> {
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let path = crate::path::canonicalize(path);
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std::env::set_current_dir(&path)?;
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let mut cwd = CWD.write().unwrap();
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*cwd = Some(path);
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Ok(())
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}
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pub fn env_var_is_set(env_var_name: &str) -> bool {
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std::env::var_os(env_var_name).is_some()
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}
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pub fn binary_exists(binary_name: &str) -> bool {
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which::which(binary_name).is_ok()
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}
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#[cfg(test)]
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mod tests {
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use super::{current_working_dir, set_current_working_dir};
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#[test]
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fn current_dir_is_set() {
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let new_path = dunce::canonicalize(std::env::temp_dir()).unwrap();
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let cwd = current_working_dir();
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assert_ne!(cwd, new_path);
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set_current_working_dir(&new_path).expect("Couldn't set new path");
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let cwd = current_working_dir();
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assert_eq!(cwd, new_path);
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}
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}
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