From 140f1af212b64b32528169193aea14a23e9fd9a1 Mon Sep 17 00:00:00 2001
From: Vicente Adolfo Bolea Sanchez <vicente.bolea@kitware.com>
Date: Fri, 26 Dec 2025 20:44:25 -0500
Subject: [PATCH] enable spack buildcache

---
 .gitlab/gitlab-ci-frontier.yml | 1 +
 scripts/ci/gitlab-ci/run.sh    | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/.gitlab/gitlab-ci-frontier.yml b/.gitlab/gitlab-ci-frontier.yml
index e11ff87..795a926 100644
--- a/.gitlab/gitlab-ci-frontier.yml
+++ b/.gitlab/gitlab-ci-frontier.yml
@@ -38,6 +38,7 @@ stages:
     SPACK_DISABLE_LOCAL_CONFIG: "true"
     SPACK_BUILD_DIR: "${CUSTOM_CI_BUILDS_DIR}/artifacts/spack-build-${CI_PIPELINE_IID}"
     SPACK_USER_CACHE_PATH: "${SPACK_BUILD_DIR}/cache"
+    SPACK_BUILDCACHE_DIR: "/lustre/orion/world-shared/ums032/frontier-buildcache/"
 
     # Order matters
     JOB_MODULES: >-
diff --git a/scripts/ci/gitlab-ci/run.sh b/scripts/ci/gitlab-ci/run.sh
index d42b8b9..adaf48c 100755
--- a/scripts/ci/gitlab-ci/run.sh
+++ b/scripts/ci/gitlab-ci/run.sh
@@ -43,6 +43,10 @@ case ${STEP} in
     # Activate the environment pointing to the config directory
     spack env activate --create --without-view --envfile "${PWD}/spack/template" tools-sdk
 
+    if [ -n "${SPACK_BUILDCACHE_DIR}" ]; then
+      spack mirror add --unsigned --autopush frontier "file://${SPACK_BUILDCACHE_DIR}"
+    fi
+
     # Verify environment is active
     spack env status