angular-cn/scripts/ci/clone_angular_material_repo.sh

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#!/usr/bin/env bash
set -u -e -o pipefail
# Clones the Angular Material repository if the repository has not been cloned before. If
# the repository is already cloned, the script refreshes the repository by syncing with
# upstream and resetting to the desired Material commit (see "MATERIAL_REPO_COMMIT" variable).
if [[ ! -d "${MATERIAL_REPO_TMP_DIR}" ]]; then
# Clone the Material repository if not present through restored cache.
git clone --branch ${MATERIAL_REPO_BRANCH} ${MATERIAL_REPO_URL} ${MATERIAL_REPO_TMP_DIR}
# Switch into the cloned repository.
cd ${MATERIAL_REPO_TMP_DIR}
# Reset branch to the desired commit.
git reset --hard ${MATERIAL_REPO_COMMIT}
else
# Switch into the cached repository.
cd ${MATERIAL_REPO_TMP_DIR}
# Only refresh the repository if the current branch HEAD is not
# matching the desired commit.
if [[ "$(git rev-parse HEAD)" != "${MATERIAL_REPO_COMMIT}" ]]; then
# Pull the latest changes of the specified branch.
git fetch origin ${MATERIAL_REPO_BRANCH}
# Reset the current branch to the desired commit.
git reset --hard ${MATERIAL_REPO_COMMIT}
fi
fi