From c2b15c989e7bc675d6c1482cf3580f92af984e56 Mon Sep 17 00:00:00 2001
From: Johan Andersson <johan@embark-studios.com>
Date: Mon, 28 Oct 2019 16:46:57 +0100
Subject: [PATCH] Pin MoltenVK version to v1.0.37 (#5)

---
 Cargo.toml |  2 +-
 README.md  | 13 ++++++++++++-
 build.rs   | 11 +++++++++--
 3 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index eb1791e..5a0f535 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "ash-molten"
 description = "Statically linked MoltenVK for Vulkan on Mac using Ash"
-version = "0.1.0"
+version = "0.2.0+37"
 authors = ["Embark <opensource@embark-studios.com>", "Maik Klein <maik.klein@embark-studios.com>"]
 edition = "2018"
 license = "MIT OR Apache-2.0"
diff --git a/README.md b/README.md
index 4d3919f..dc7059e 100644
--- a/README.md
+++ b/README.md
@@ -45,9 +45,20 @@ You can run the example with `cargo run`.
 
 ### Features
 
-`cargo build` will clone the newest master of [MoltenVK](https://github.com/KhronosGroup/MoltenVK) compile and statically link it with your application. 
+`cargo build` will clone a specific release of [MoltenVK](https://github.com/KhronosGroup/MoltenVK) compile and statically link it with your application. 
+
 If you want to compile [MoltenVK](https://github.com/KhronosGroup/MoltenVK) yourself, you can use the `external` feature. `cargo build --features external` requires `libMoltenVK` to be visible (`LD_LIBRARY_PATH`).
 
+### How to update
+
+To update the version of [MoltenVK](https://github.com/KhronosGroup/MoltenVK) uses, change the following:
+
+- In `build.rs`, change `let tag = "v1.0.37"` to the new [MoltenVK release](https://github.com/KhronosGroup/MoltenVK/releases) tag name
+- Update the crate version in `Cargo.toml`
+  - Bump the patch version
+  - Set the version metadata to the MoltenVK release. 
+  - E.g. `0.2.0+37` -> `0.2.1+38`.
+
 ## Contributing
 
 We welcome community contributions to this project.
diff --git a/build.rs b/build.rs
index 6e2cfad..f4e70e5 100644
--- a/build.rs
+++ b/build.rs
@@ -28,8 +28,11 @@ mod mac {
             },
         };
 
-        let checkout_dir =
-            Path::new(&std::env::var("OUT_DIR").expect("Couldn't find OUT_DIR")).join("MoltenVK");
+        // MoltenVK git tagged release to use
+        let tag = "v1.0.37";
+
+        let checkout_dir = Path::new(&std::env::var("OUT_DIR").expect("Couldn't find OUT_DIR"))
+            .join(format!("MoltenVK-{}", tag));
 
         let exit = Arc::new(AtomicBool::new(false));
         let wants_exit = exit.clone();
@@ -59,6 +62,10 @@ mod mac {
         } else {
             Command::new("git")
                 .arg("clone")
+                .arg("--branch")
+                .arg(tag.to_owned())
+                .arg("--depth")
+                .arg("1")
                 .arg("https://github.com/KhronosGroup/MoltenVK.git")
                 .arg(&checkout_dir)
                 .spawn()