From 7231808c58367b490bd76f6c54a52616d50bf3cf Mon Sep 17 00:00:00 2001
From: corey-derochie-amd
 <161367113+corey-derochie-amd@users.noreply.github.com>
Date: Fri, 27 Sep 2024 11:07:16 -0600
Subject: [PATCH] Checkout submodules with shallow depth (#1353)

* Make submodules shallow

* Updated README for the shallow checkout changes.
---
 .gitmodules | 2 ++
 README.md   | 7 +++----
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/.gitmodules b/.gitmodules
index 43f5bd06a7..eae2c515ce 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -2,7 +2,9 @@
 	path = ext-src/mscclpp
 	url = https://github.com/microsoft/mscclpp.git
 	ignore = dirty
+	shallow = true
 [submodule "ext-src/json"]
 	path = ext-src/json
 	url = https://github.com/nlohmann/json.git
 	ignore = dirty
+	shallow = true
diff --git a/README.md b/README.md
index 2fe91d0a55..b266ab96aa 100644
--- a/README.md
+++ b/README.md
@@ -68,17 +68,16 @@ By default, RCCL builds for all GPU targets defined in `DEFAULT_GPUS` in `CMakeL
 ### To build the library using CMake:
 
 ```shell
-$ git clone https://github.com/ROCm/rccl.git --recurse-submodules
+$ git clone --recursive https://github.com/ROCm/rccl.git
 $ cd rccl
 $ mkdir build
 $ cd build
 $ cmake ..
 $ make -j 16      # Or some other suitable number of parallel jobs
 ```
-If you have already cloned, you can checkout the `mscclpp` submodule manually.
+If you have already cloned, you can checkout the external submodules manually.
 ```shell
-$ cd ext-src/mscclpp
-$ git submodule update --init --recursive
+$ git submodule update --init --recursive --depth=1
 ```
 You may substitute an installation path of your own choosing by passing `CMAKE_INSTALL_PREFIX`. For example:
 ```shell