From 9853db78235141b669c4fa4859325e35977e7a39 Mon Sep 17 00:00:00 2001
From: Niko <info@parlepeuple.fr>
Date: Sun, 28 Aug 2022 23:28:35 +0300
Subject: [PATCH] adding version function to environment

---
 .gitignore                           | 1 +
 src/backend/impl_lmdb/environment.rs | 4 ++++
 src/backend/impl_safe/environment.rs | 5 +++++
 src/backend/traits.rs                | 2 ++
 src/env.rs                           | 4 ++++
 5 files changed, 16 insertions(+)

diff --git a/.gitignore b/.gitignore
index 4308d82..e347fa3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+.DS_Store
 target/
 **/*.rs.bk
 Cargo.lock
diff --git a/src/backend/impl_lmdb/environment.rs b/src/backend/impl_lmdb/environment.rs
index e528fad..590e2c2 100644
--- a/src/backend/impl_lmdb/environment.rs
+++ b/src/backend/impl_lmdb/environment.rs
@@ -218,6 +218,10 @@ impl<'e> BackendEnvironment<'e> for EnvironmentImpl {
             .map_err(ErrorImpl::LmdbError)
     }
 
+    fn version(&self) -> &str {
+        self.lmdbenv.version()
+    }
+
     fn begin_ro_txn(&'e self) -> Result<Self::RoTransaction, Self::Error> {
         self.lmdbenv
             .begin_ro_txn()
diff --git a/src/backend/impl_safe/environment.rs b/src/backend/impl_safe/environment.rs
index 6ae834b..edfeb09 100644
--- a/src/backend/impl_safe/environment.rs
+++ b/src/backend/impl_safe/environment.rs
@@ -323,4 +323,9 @@ impl<'e> BackendEnvironment<'e> for EnvironmentImpl {
         db_filename.push(DEFAULT_DB_FILENAME);
         vec![db_filename]
     }
+
+    fn version(&self) -> &str {
+        let ret: &str = "unknown";
+        ret
+    }
 }
diff --git a/src/backend/traits.rs b/src/backend/traits.rs
index 1dda15a..e034b6f 100644
--- a/src/backend/traits.rs
+++ b/src/backend/traits.rs
@@ -117,6 +117,8 @@ pub trait BackendEnvironment<'e>: Debug {
 
     fn info(&self) -> Result<Self::Info, Self::Error>;
 
+    fn version(&self) -> &str;
+
     fn freelist(&self) -> Result<usize, Self::Error>;
 
     fn load_ratio(&self) -> Result<Option<f32>, Self::Error>;
diff --git a/src/env.rs b/src/env.rs
index 32e4fe5..c1e74da 100644
--- a/src/env.rs
+++ b/src/env.rs
@@ -272,6 +272,10 @@ where
         self.env.info().map_err(|e| e.into())
     }
 
+    pub fn version(&self) -> &str {
+        self.env.version()
+    }
+
     /// Retrieve the load ratio (# of used pages / total pages) about this environment.
     ///
     /// With the formular: (last_page_no - freelist_pages) / total_pages.