.envrc-gcp

#!/usr/bin/env bash
#  vim:ts=4:sts=4:sw=4:et
#
#  Author: Hari Sekhon
#  Date: Mon Feb 22 17:42:01 2021 +0000
#
#  https://github.com/HariSekhon/DevOps-Bash-tools
#
#  License: see accompanying Hari Sekhon LICENSE file
#
#  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
#
#  https://www.linkedin.com/in/HariSekhon
#

# ============================================================================ #
#                              G C P   D i r e n v
# ============================================================================ #

# https://direnv.net/man/direnv-stdlib.1.html

# See Also:
#
#   .envrc
#   .envrc-aws
#   .envrc-kubernetes

# direnv stdlib - loads .envrc from parent dir up to /
#
# useful to accumulate parent and child directory .envrc settings eg. adding Kubernetes namespace, ArgoCD app etc.
#
# bypasses security authorization though - use with care
#source_up
#
# source_up must be loaded before set -u otherwise gets this error:
#
#   direnv: loading .envrc
#   /bin/bash: line 226: $1: unbound variable

set -euo pipefail
[ -n "${DEBUG:-}" ] && set -x
srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# https://cloud.google.com/sdk/gcloud/reference/config

# If using other services, infer the environment variables to put below by reading:
#
#   gcloud topic configurations
#       or
#   gcloud config set --help

if [ -z "${CI:-}" ]; then
    # gcloud config configurations list
    export CLOUDSDK_ACTIVE_CONFIG_NAME="dev"
fi

# XXX: Edit
export CLOUDSDK_CORE_PROJECT=myproject

# XXX: Edit
export REGION=europe-west2

export CLOUDSDK_COMPUTE_REGION="$REGION"
export CLOUDSDK_COMPUTE_ZONE="${REGION}-a" # or b or c

export CLOUDSDK_AI_REGION="$REGION"
export CLOUDSDK_AI_PLATFORM_REGION="$REGION"
export CLOUDSDK_DATAPROC_REGION="$REGION"
export CLOUDSDK_DEPLOY_REGION="$REGION"
export CLOUDSDK_FILESTORE_REGION="$REGION"
export CLOUDSDK_FUNCTIONS_REGION="$REGION"
export CLOUDSDK_MEMCACHE_REGION="$REGION"
export CLOUDSDK_REDIS_REGION="$REGION"
export CLOUDSDK_RUN_REGION="$REGION"
export CLOUDSDK_RUN_CLUSTER_LOCATION="$REGION"
export CLOUDSDK_VMWARE_REGION="$REGION"

# XXX: Edit
export CLOUDSDK_RUN_PLATFORM=managed
#export CLOUDSDK_RUN_PLATFORM=gke
#export CLOUDSDK_RUN_PLATFORM=kubernetes
#export CLOUDSDK_RUN_CLUSTER=mycluster

export CLOUDSDK_GCLOUDIGNORE_ENABLED=True
#export CLOUDSDK_BUILDS_USE_KANIKO=True

# XXX: Edit, or remove if only have 1 cluster in project, will auto-determine below
export CLOUDSDK_CONTAINER_CLUSTER=mycluster  # GKE cluster name

# If CLOUDSDK_CONTAINNER_CLUSTER isn't set and there is only one EKS cluster in this account and region, then use it - smart, but slower, prefer setting it explicitly for speed
if [ -z "${CLOUDSDK_CONTAINER_CLUSTER:-}" ]; then
    gke_clusters=()
    while IFS='' read -r line; do
        gke_clusters+=("$line")
    done < <(gcloud container clusters list --format='get(name)')
    if [ "${#gke_clusters[@]}" -eq 1 ]; then
        export CLOUDSDK_CONTAINER_CLUSTER="${gke_clusters[*]}"
    fi
fi

# alternatively see gke_kube_context() function in .envrc-kubernetes
if [ -n "${CLOUDSDK_CONTAINER_CLUSTER:-}" ]; then
    # kubectl context is easily created by running adjacent aws_kube_creds.sh script first

    export GKE_CONTEXT="gke_${CLOUDSDK_CORE_PROJECT}_${CLOUDSDK_COMPUTE_REGION}_${CLOUDSDK_CONTAINER_CLUSTER}"

    # XXX: safer to inline .envrc-kubernetes if you're worried about changes to it bypassing 'direnv allow' authorization
    # shellcheck disable=SC1090
    . "$srcdir/.envrc-kubernetes" "$GKE_CONTEXT"
fi