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# Builds a cached .tar.gz of the master branch with full history and
# uploads it to Google Cloud Storage. This archive is downloaded by a
# script defined by a CI/CD variable named CI_PRE_CLONE_SCRIPT. This has
# two benefits:
#
# 1. It speeds up builds. A 800 MB download only takes seconds.
# 2. It significantly reduces load on the file server. Smaller deltas
# means less time spent in git pack-objects.
#
# Since the destination directory of the archive depends on the project
# ID, this is only run on GitLab.com.
#
# CI_REPO_CACHE_CREDENTIALS contains the Google Cloud service account
# JSON for uploading to the gitlab-ci-git-repo-cache bucket. These
# credentials are stored in the Production vault.
#
# Note that this bucket should be located in the same continent as the
# runner, or network egress charges will apply:
# https://cloud.google.com/storage/pricing
cache-repo:
extends: .cache-repo:rules
image: gcr.io/google.com/cloudsdktool/cloud-sdk:alpine
stage: sync
allow_failure: true
variables:
GIT_STRATEGY: none
TAR_FILENAME: /tmp/gitlab-master.tar
script:
- cd ..
- rm -rf $CI_PROJECT_NAME
- git clone --progress $CI_REPOSITORY_URL $CI_PROJECT_NAME
- cd $CI_PROJECT_NAME
- gcloud auth activate-service-account --key-file=$CI_REPO_CACHE_CREDENTIALS
- git remote rm origin
- tar cf $TAR_FILENAME .
- gzip $TAR_FILENAME
- gsutil cp $TAR_FILENAME.gz gs://gitlab-ci-git-repo-cache/project-$CI_PROJECT_ID/gitlab-master.tar.gz
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