From e0fb3f369181f0580e5c3cf5c36616b4be7aa33d Mon Sep 17 00:00:00 2001
From: tnasu <toshimasa_nasu@hotmail.com>
Date: Wed, 18 May 2022 18:33:47 +0900
Subject: [PATCH] Cache go-modules

---
 .github/workflows/e2e.yml  | 8 ++++++++
 test/e2e/docker/Dockerfile | 5 ++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index 3bc5d34ee..fc68fad7c 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -28,6 +28,13 @@ jobs:
             go.mod
             go.sum
 
+      - name: Download go modules
+        id: gomodules
+        run: |
+          go mod download
+          GOMODCACHE=$(go env GOMODCACHE)
+          echo "::set-output name=GOMODCACHE::${GOMODCACHE}"
+
       - name: Create cache directory
         run: mkdir -p /tmp/.buildx-cache
 
@@ -53,6 +60,7 @@ jobs:
           cache-from: type=local,src=/tmp/.buildx-cache
           cache-to: type=local,dest=/tmp/.buildx-cache-new,mode=max
           load: true
+          build-args: GOMODCACHE=${{ steps.gomodules.outputs.GOMODCACHE }}
         if: "env.GIT_DIFF != ''"
 
       - name: Move cached Docker layers
diff --git a/test/e2e/docker/Dockerfile b/test/e2e/docker/Dockerfile
index 280128e2b..c5d7d8b4f 100644
--- a/test/e2e/docker/Dockerfile
+++ b/test/e2e/docker/Dockerfile
@@ -1,3 +1,5 @@
+# syntax=docker/dockerfile:1
+
 # We need to build in a Linux environment to support C libraries, e.g. RocksDB.
 # We use Debian instead of Alpine, so that we can use binary database packages
 # instead of spending time compiling them.
@@ -39,8 +41,9 @@ ENV CGO_LDFLAGS -lrocksdb
 ENV LIBSODIUM 1
 
 # Fetch dependencies separately (for layer caching)
+ARG GOMODCACHE
 COPY go.mod go.sum ${SRCDIR}
-RUN cd ${SRCDIR} && go mod download
+RUN --mount=type=cache,target=${GOMODCACHE} cd ${SRCDIR} && go mod download
 
 # Build Ostracon and install into /usr/bin/ostracon
 COPY . ${SRCDIR}