Docker: how to build an image from a non-master branch on Github repository
Is it possible to build an image from a non-master branch on a Github repository?
For example, I have the repository
//github.com/myAccount/docker-myImage with a branch
development that I would like to use for my image. Unfortunately, the following command only seems to allow building from the
docker build -t myAccount/myImage git://github.com/myAccount/docker-myImage
Here is the relevant documentation from
man docker build:
Building an image using a URL This will clone the specified Github repository from the URL and use it as context. The Dockerfile at the root of the repository is used as Dockerfile. This only works if the Github repository is a dedicated repository. docker build github.com/scollier/Fedora-Dockerfiles/tree/master/apache Note: You can set an arbitrary Git repository via the git:// schema.
Perhaps there is an alternative, like
docker build -t myAccount/myImage git://github.com/myAccount/docker-myImage:development?
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docker build -t myAccount/myImage https://github.com/myAccount/docker-myImage.git#development
See docker build command reference for more options.
The doc that you quoted itself mentions how you can specify the branch:
tree/master to the branch you want and see.
I proposed this question on
#docker at the Freenode IRC and the user
scollier contacted me and he said that he’ll get back to me about this issue. I believe he is involved with the Docker documentation that I mentioned in my questions. In the meantime, I found a workaround by adding the following to my
RUN git clone something && git cd something && git checkout branch
This solution seems to solve all my needs. Thanks for the support!