仅在更改dockerfile时才执行docker build

Question

在travis-ci中，如果更改dockerfile或install.sh，如何构建docker镜像？

注意：install.sh会安装依赖项。它包含dockerfile的RUN命令使用的一长串命令。

Answer 1

$(git diff --name-only ${TRAVIS_COMMIT_RANGE} | grep docker/Dockerfile > /dev/null)
dockerfile_status=$?

$(git diff --name-only ${TRAVIS_COMMIT_RANGE} | grep scripts/linux/bootstrap.sh > /dev/null)
bootstrap_status=$?

if [[ ${dockerfile_status} == "0" || ${bootstrap_status} == "0" ]]
then
    echo "New docker image is required, building new image"
else
    echo "New docker image is not required"
fi