fix: run hook-env on directory change (#3258)

src/cli/hook_env.rs

@@ -12,7 +12,7 @@ use crate::env::{PATH_KEY, TERM_WIDTH, __MISE_DIFF};
 use crate::env_diff::{EnvDiff, EnvDiffOperation};
 use crate::shell::{get_shell, ShellType};
 use crate::toolset::{Toolset, ToolsetBuilder};
-use crate::{env, hook_env};
+use crate::{dirs, env, hook_env};
 
 /// [internal] called by activate hook to update env vars directory change
 #[derive(Debug, clap::Args)]
@@ -59,6 +59,7 @@ impl HookEnv {
         patches.extend(self.build_path_operations(&settings, &paths, &__MISE_DIFF.path)?);
         patches.push(self.build_diff_operation(&diff)?);
         patches.push(self.build_watch_operation(&watch_files)?);
+        patches.push(self.build_dir_operation()?);
 
         let output = hook_env::build_env_commands(&*shell, &patches);
         miseprint!("{output}")?;
@@ -167,6 +168,16 @@ impl HookEnv {
         ))
     }
 
+    fn build_dir_operation(&self) -> Result<EnvDiffOperation> {
+        Ok(EnvDiffOperation::Add(
+            "__MISE_DIR".into(),
+            dirs::CWD
+                .as_ref()
+                .map(|p| p.to_string_lossy().to_string())
+                .unwrap_or_default(),
+        ))
+    }
+
     fn build_watch_operation(
         &self,
         watch_files: impl IntoIterator<Item = impl AsRef<Path>>,

src/env.rs

@@ -128,6 +128,7 @@ pub static MISE_TIMINGS: Lazy<u8> = Lazy::new(|| var_u8("MISE_TIMINGS"));
 pub static MISE_PID: Lazy<String> = Lazy::new(|| process::id().to_string());
 pub static __MISE_SCRIPT: Lazy<bool> = Lazy::new(|| var_is_true("__MISE_SCRIPT"));
 pub static __MISE_DIFF: Lazy<EnvDiff> = Lazy::new(get_env_diff);
+pub static __MISE_DIR: Lazy<PathBuf> = Lazy::new(|| var_path("__MISE_DIR").unwrap_or_default());
 pub static __MISE_ORIG_PATH: Lazy<Option<String>> = Lazy::new(|| var("__MISE_ORIG_PATH").ok());
 pub static __MISE_WATCH: Lazy<Option<HookEnvWatches>> = Lazy::new(|| match var("__MISE_WATCH") {
     Ok(raw) => deserialize_watches(raw)

src/hook_env.rs

@@ -24,6 +24,12 @@ pub fn should_exit_early(watch_files: impl IntoIterator<Item = impl AsRef<Path>>
     if args.len() < 2 || args[1] != "hook-env" {
         return false;
     }
+    if !dirs::CWD
+        .as_ref()
+        .is_some_and(|cwd| cwd == &*env::__MISE_DIR)
+    {
+        return false;
+    }
     let watch_files = get_watch_files(watch_files);
     match &*env::__MISE_WATCH {
         Some(watches) => {