1 files changed, 34 insertions, 6 deletions
diff --git a/crates/base-db/src/input.rs b/crates/base-db/src/input.rs
index 6a8ab71624e..240af7925cc 100644
--- a/crates/base-db/src/input.rs
+++ b/crates/base-db/src/input.rs
@@ -295,11 +295,30 @@ pub struct CrateData {
     pub is_proc_macro: bool,
 }
 
-#[derive(Default, Debug, Clone, PartialEq, Eq)]
+#[derive(Default, Clone, PartialEq, Eq)]
 pub struct Env {
     entries: FxHashMap<String, String>,
 }
 
+impl fmt::Debug for Env {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        struct EnvDebug<'s>(Vec<(&'s String, &'s String)>);
+
+        impl fmt::Debug for EnvDebug<'_> {
+            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+                f.debug_map().entries(self.0.iter().copied()).finish()
+            }
+        }
+        f.debug_struct("Env")
+            .field("entries", &{
+                let mut entries: Vec<_> = self.entries.iter().collect();
+                entries.sort();
+                EnvDebug(entries)
+            })
+            .finish()
+    }
+}
+
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct Dependency {
     pub crate_id: CrateId,
@@ -331,10 +350,11 @@ impl CrateGraph {
         version: Option<String>,
         cfg_options: Arc<CfgOptions>,
         potential_cfg_options: Option<Arc<CfgOptions>>,
-        env: Env,
+        mut env: Env,
         is_proc_macro: bool,
         origin: CrateOrigin,
     ) -> CrateId {
+        env.entries.shrink_to_fit();
         let data = CrateData {
             root_file_id,
             edition,
@@ -651,16 +671,24 @@ impl FromIterator<(String, String)> for Env {
 }
 
 impl Env {
-    pub fn set(&mut self, env: &str, value: String) {
-        self.entries.insert(env.to_owned(), value);
+    pub fn set(&mut self, env: &str, value: impl Into<String>) {
+        self.entries.insert(env.to_owned(), value.into());
     }
 
     pub fn get(&self, env: &str) -> Option<String> {
         self.entries.get(env).cloned()
     }
 
-    pub fn iter(&self) -> impl Iterator<Item = (&str, &str)> {
-        self.entries.iter().map(|(k, v)| (k.as_str(), v.as_str()))
+    pub fn extend_from_other(&mut self, other: &Env) {
+        self.entries.extend(other.entries.iter().map(|(x, y)| (x.to_owned(), y.to_owned())));
+    }
+}
+
+impl From<Env> for Vec<(String, String)> {
+    fn from(env: Env) -> Vec<(String, String)> {
+        let mut entries: Vec<_> = env.entries.into_iter().collect();
+        entries.sort();
+        entries
     }
 }