Build a container from a Dockerfile

The Wave CLI supports building a container from a Dockerfile. Specifying an optional build context allows the use of ADD and COPY commands in a Dockerfile.

Building a Dockerfile that requires --build-arg for build time variables isn't currently supported.

Related CLI arguments

• --containerfile or -f: A Dockerfile to build. Build args aren't currently supported.
• --context: A directory that contains the context for the build.

Example usage

In the following example Dockerfile, several packages are installed:

cat << EOF > ./Dockerfile
FROM alpine

RUN apk update && apk add bash cowsay \
        --update-cache \
        --repository https://alpine.global.ssl.fastly.net/alpine/edge/community \
        --repository https://alpine.global.ssl.fastly.net/alpine/edge/main \
        --repository https://dl-3.alpinelinux.org/alpine/edge/testing
EOF

Build and run the container based on the Dockerfile in the previous example by running the following command:

container=$(wave --containerfile ./Dockerfile)
docker run --rm $container cowsay "Hello world"

In the following example Dockerfile, a local context is used:

cat << EOF > ./Dockerfile
FROM alpine
ADD hello.sh /usr/local/bin/
EOF

Create the shell script referenced in the previous example by running the following commands in your terminal:

mkdir -p build-context/
printf 'echo Hello world!' > build-context/hello.sh
chmod +x build-context/hello.sh

Build and run the container based on the Dockerfile in the previous example by running the following command:

docker run $(wave -f Dockerfile --context build-context) sh -c hello.sh