haxeEstimated reading time: 8 minutes
Haxe is a modern, high level, static typed programming language with multiple compilation targets.
Supported tags and respective
Where to file issues:
the Haxe Foundation
Supported Docker versions:
the latest release (down to 1.6 on a best-effort basis)
What is Haxe?
Haxe is an open source toolkit based on a modern, high level, strictly typed programming language, a cross-compiler, a complete cross-platform standard library and ways to access each platform’s native capabilities.
About this image
This image ships a minimal Haxe toolkit:
haxecompiler with its standard library
How to use this image
The most straightforward way to use this image is to use a Haxe container as both the build and runtime environment. In your
Dockerfile, writing something along the lines of the following will compile and run your project:
FROM haxe:3.4 RUN mkdir -p /usr/src/app WORKDIR /usr/src/app # install dependencies COPY *.hxml /usr/src/app/ RUN yes | haxelib install all # compile the project COPY . /usr/src/app RUN haxe build.hxml # run the output when the container starts CMD ["neko", "Main.n"]
Then, build and run the Docker image:
$ docker build -t my-haxe-app . $ docker run -it --rm --name my-running-app my-haxe-app
Using the onbuild variants
onbuild variants that include multiple
ONBUILD triggers to perform all of the steps in the above Dockerfile, except there is no
CMD instruction for running the compilation output.
Rewriting the above Dockerfile with
haxe:3.4-onbuild, we will get:
FROM haxe:3.4-onbuild # run the output when the container starts CMD ["neko", "Main.n"]
onbuild variants assume the main compilation hxml file is named
build.hxml. To use another hxml file, set the
BUILD_HXML build argument during build:
$ docker build -t my-haxe-app --build-arg BUILD_HXML=compile.hxml .
haxe images come in many flavors, each designed for a specific use case.
This is the defacto image. If you are unsure about what your needs are, you probably want to use this one. It is designed to be used both as a throw away container (mount your source code and start the container to start your app), as well as the base to build other images off of.
Some of these tags may have names like jessie or stretch in them. These are the suite code names for releases of Debian and indicate which release the image is based on.
ONBUILD image variants are deprecated, and their usage is discouraged. For more details, see docker-library/official-images#2076.
onbuild variant is really useful for “getting off the ground running” (zero to Dockerized in a short period of time), it’s not recommended for long-term usage within a project due to the lack of control over when the
ONBUILD triggers fire (see also
Once you’ve got a handle on how your project functions within Docker, you’ll probably want to adjust your
Dockerfile to inherit from a non-
onbuild variant and copy the commands from the
Dockerfile (moving the
ONBUILD lines to the end and removing the
ONBUILD keywords) into your own file so that you have tighter control over them and more transparency for yourself and others looking at your
Dockerfile as to what it does. This also makes it easier to add additional requirements as time goes on (such as installing more packages before performing the previously-
This image is based on Windows Server Core (
microsoft/windowsservercore). As such, it only works in places which that image does, such as Windows 10 Professional/Enterprise (Anniversary Edition) or Windows Server 2016.
For information about how to get Docker running on Windows, please see the relevant “Quick Start” guide provided by Microsoft:
This image is based on the popular Alpine Linux project, available in the
alpine official image. Alpine Linux is much smaller than most distribution base images (~5MB), and thus leads to much slimmer images in general.
This variant is highly recommended when final image size being as small as possible is desired. The main caveat to note is that it does use musl libc instead of glibc and friends, so certain software might run into issues depending on the depth of their libc requirements. However, most software doesn’t have an issue with this, so this variant is usually a very safe choice. See this Hacker News comment thread for more discussion of the issues that might arise and some pro/con comparisons of using Alpine-based images.
To minimize image size, it’s uncommon for additional related tools (such as
bash) to be included in Alpine-based images. Using this image as a base, add the things you need in your own Dockerfile (see the
alpine image description for examples of how to install packages if you are unfamiliar).
View license information for the software contained in this image.
As with all Docker images, these likely also contain other software which may be under other licenses (such as Bash, etc from the base distribution, along with any direct or indirect dependencies of the primary software being contained).
Some additional license information which was able to be auto-detected might be found in the
As for any pre-built image usage, it is the image user’s responsibility to ensure that any use of this image complies with any relevant licenses for all software contained within.library, sample, haxe