containerized-hastec

DEPRECATED: this project has moved into The Cannery and is available on Docker hub as catseye/x-hastec.

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Run the Haste compiler hastec almost as if you had it installed locally.

Several of Cat's Eye Technologies' language projects use hastec. But as of this writing, hastec only works with GHC 7.10, and trying to install GHC 7.10 on modern OSes is, shall we say, burdensome.

So this is a Docker image, based on rwstauner/haste-compiler, with some additions:

• has extra some Cabal packages installed (notably Parsec)
• can be run as the host user, not just as root
• comes with a script so that hastec can be run on the host, almost as if it was installed there.

Instructions

• Install Docker and add your user to the docker group.
• Put the bin directory in this repository on your executable PATH.
• Run hastec --help. This will cause the image to be downloaded from catseye/hastec on Docker Hub.
• You can now run hastec almost as if it was installed locally.

If you want to build the image yourself instead of downloading the one on Docker Hub, in the root directory of this repository, run ./build.sh.

Caveats

"almost as if you had it installed locally" does have some limitations.

The containerized hastec works on the host's file system through a bind mount. The script establishes a bind mount from the current working directory of the host, and the container can't see any of the host's filesystem that is outside that directory.

So, for example, you can't tell hastec to output the generated JavaScript file to ../built/out.js because it can't see ../.

Also, the Docker daemon always runs as root. The script tells the container to be run as the current user on the host. This prevents the files that hastec writes from being owned by root. But this directive is not total; the Docker daemon still runs as root. For that reason I would recommend not running the script from a directory that contains anything important, such as /.