Remove the feature and always use the vendored version

Author: Kerollmops

README.md

@@ -13,11 +13,6 @@ This library is able to serialize all kind of types, not just bytes slices, even
 
 Go check out [the examples](heed/examples/).
 
-## Vendoring
-
-By default, if LMDB is installed on the system, this crate will attempt to make use of the system-available LMDB.
-To force installation from source, build this crate with the `vendored` feature.
-
 ## Building from Source
 
 ### Using the system LMDB if available
@@ -35,11 +30,3 @@ However, if you already cloned it and forgot about the initialising the submodul
 ```bash
 git submodule update --init
 ```
-
-### Always vendoring
-
-```bash
-git clone --recursive https://github.com/meilisearch/heed.git
-cd heed
-cargo build --features vendored
-```

heed/Cargo.toml

@@ -35,9 +35,6 @@ url = "2.3.1"
 # like the `EnvOpenOptions` struct.
 default = ["serde", "serde-bincode", "serde-json"]
 
-# Use the provided version of LMDB instead of the one that is installed on the system.
-vendored = ["lmdb-master-sys/vendored"]
-
 # The NO_TLS flag is automatically set on Env opening and
 # RoTxn implements the Sync trait. This allow the user to reference
 # a read-only transaction from multiple threads at the same time.

lmdb-master-sys/Cargo.toml

@@ -32,7 +32,6 @@ pkg-config = "0.3.26"
 
 [features]
 default = []
-vendored = []
-with-asan = ["vendored"]
-with-fuzzer = ["vendored"]
-with-fuzzer-no-link = ["vendored"]
+with-asan = []
+with-fuzzer = []
+with-fuzzer-no-link = []

lmdb-master-sys/build.rs

@@ -31,27 +31,25 @@ fn main() {
         warn!("Building with `-fsanitize=fuzzer`.");
     }
 
-    if cfg!(feature = "vendored") || pkg_config::find_library("lmdb").is_err() {
-        let mut builder = cc::Build::new();
-
-        builder
-            .file(lmdb.join("mdb.c"))
-            .file(lmdb.join("midl.c"))
-            // https://github.com/mozilla/lmdb/blob/b7df2cac50fb41e8bd16aab4cc5fd167be9e032a/libraries/liblmdb/Makefile#L23
-            .flag_if_supported("-Wno-unused-parameter")
-            .flag_if_supported("-Wbad-function-cast")
-            .flag_if_supported("-Wuninitialized");
-
-        if cfg!(feature = "with-asan") {
-            builder.flag("-fsanitize=address");
-        }
-
-        if cfg!(feature = "with-fuzzer") {
-            builder.flag("-fsanitize=fuzzer");
-        } else if cfg!(feature = "with-fuzzer-no-link") {
-            builder.flag("-fsanitize=fuzzer-no-link");
-        }
-
-        builder.compile("liblmdb.a")
+    let mut builder = cc::Build::new();
+
+    builder
+        .file(lmdb.join("mdb.c"))
+        .file(lmdb.join("midl.c"))
+        // https://github.com/mozilla/lmdb/blob/b7df2cac50fb41e8bd16aab4cc5fd167be9e032a/libraries/liblmdb/Makefile#L23
+        .flag_if_supported("-Wno-unused-parameter")
+        .flag_if_supported("-Wbad-function-cast")
+        .flag_if_supported("-Wuninitialized");
+
+    if cfg!(feature = "with-asan") {
+        builder.flag("-fsanitize=address");
     }
+
+    if cfg!(feature = "with-fuzzer") {
+        builder.flag("-fsanitize=fuzzer");
+    } else if cfg!(feature = "with-fuzzer-no-link") {
+        builder.flag("-fsanitize=fuzzer-no-link");
+    }
+
+    builder.compile("liblmdb.a")
 }