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#!/bin/sh
# input:
# SOURCE_IMAGE: Image name for the source image
# TARGET_IMAGE: Name of image to build
# DOTENV: The name of the .env.* file that contains the default env vars to export.
# e.g. DOTENV=".env.12-3-stable"
set -e
cd "$(dirname "$0")/.."
DOCKERFILE=Dockerfile.env
rm -f $DOCKERFILE
touch $DOCKERFILE
echo "FROM $SOURCE_IMAGE" > $DOCKERFILE
echo "Reading... $DOTENV"
cat "$DOTENV"
while IFS= read -r line; do
echo "ENV $line" >> $DOCKERFILE
done < "$DOTENV"
echo "Pulling... $SOURCE_IMAGE"
docker pull "$SOURCE_IMAGE"
echo "Building... $DOCKERFILE and tagging $TARGET_IMAGE"
cat $DOCKERFILE
docker build -t "$TARGET_IMAGE" -f $DOCKERFILE .
echo "Verifying env..."
docker run --entrypoint='' "$TARGET_IMAGE" env
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