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Generate deployment scripts for an application.

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mix_deploy priv templates runtime-environment-file.eex
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priv/templates/runtime-environment-file.eex 

#!/bin/sh



# Create runtime environment file on target from cloud-init metadata

# https://cloudinit.readthedocs.io/en/latest/topics/network-config.html#network-configuration-outputs



set -e



# Config vars

RUNTIME_DIR="<%= runtime_dir %>"



mkdir -p "$RUNTIME_DIR"



CLOUD_NAME=$(jq -r '.v1.cloud_name' < /run/cloud-init/instance-data.json)



if [ "$CLOUD_NAME" = "digitalocean" ]; then

    IP_ADDR=$(jq -r '.ds.meta_data.interfaces.public[0].anchor_ipv4.ip_address' < /run/cloud-init/instance-data.json)



    echo "DEFAULT_IPV4=$IP_ADDR" > "${RUNTIME_DIR}/environment"

elif [ "$CLOUD_NAME" = "aws" ]; then

    IP_ADDR=$(jq -r '.ds."meta-data"."local-ipv4"' < /run/cloud-init/instance-data.json)

    # IP_ADDR=$(jq -r '.ds."meta-data"."public-ipv4"' < /run/cloud-init/instance-data.json)



    AWS_REGION=$(jq -r '.v1.region' < /run/cloud-init/instance-data.json)



    echo "DEFAULT_IPV4=$IP_ADDR" > "${RUNTIME_DIR}/environment"

    echo "AWS_REGION=$AWS_REGION" >> "${RUNTIME_DIR}/environment"

else

    echo "Unsupported cloud: $CLOUD_NAME"

    exit 1

fi