#!/usr/bin/env bash

#
# Run integration tests on 4 cloud providers:
# - Amazon (EKS)
# - DigitalOcean (DO)
# - Google (GKE)
# - Microsoft (AKS)
#
# This script assumes you have a working Kubernetes cluster set up on each Cloud
# provider, and that Kubernetes contexts are configured via the environment
# variables $AKS $DO $EKS $GKE.
#
# For example:
# export AKS=my-aks-cluster
# export DO=do-nyc1-my-cluster
# export EKS=arn:aws:eks:us-east-1:123456789012:cluster/my-cluster
# export GKE=gke_my-project_us-east1-b_my-cluster
#
# For more information on configuring access to multiple clusters, see:
# https://kubernetes.io/docs/tasks/access-application-cluster/configure-access-multiple-clusters/#define-clusters-users-and-contexts

set -e

# TODO: share this with test-run
check_linkerd_binary() {
    printf 'Checking the linkerd binary...'
    case "$linkerd_path" in
        /*)
            ;;
        *)
            printf '\n[%s] is not an absolute path\n' "$linkerd_path"
            exit 1
            ;;
    esac
    if [ ! -x "$linkerd_path" ]; then
        printf '\n[%s] does not exist or is not executable\n' "$linkerd_path"
        exit 1
    fi
    exit_code=0
    "$linkerd_path" version --client > /dev/null 2>&1 || exit_code=$?
    if [ $exit_code -ne 0 ]; then
        printf '\nFailed to run linkerd version command\n'
        exit $exit_code
    fi
    printf '[ok]\n'
}

if [ "$#" -ne 1 ]; then
    echo "usage: ${0##*/} /path/to/linkerd" >&2
    exit 64
fi

for CLUSTER in 'AKS' 'DO' 'EKS' 'GKE'; do
    if [ -z "${!CLUSTER}" ]; then
        echo "\$$CLUSTER not set" >&2
        exit 64
    fi
done

linkerd_path=$1
check_linkerd_binary

printf '\nKicking off tests for:\n- %s\n- %s\n- %s\n- %s\n\n' "$AKS" "$DO" "$EKS" "$GKE"

trap 'trap - SIGTERM && kill -- -$$' SIGINT SIGTERM EXIT
for CLUSTER in $AKS $DO $EKS $GKE; do
    bin/test-run "$linkerd_path" l5d-integration-cloud "$CLUSTER" | while IFS= read -r line; do printf '[%s] %s\n' "$CLUSTER" "$line"; done &
done

wait

# TODO propagate error code