Simple example on how to patch elm packages

Context

Elm core libraries development have a batch approach to fixing issues as explained here.

If a particular patch is needed faster than allowed by the current process, one could fork the target package and use the approach described bellow to integrate the patch.

Approach

The included approach will set ELM_HOME to elm-stuff/pkgs and will install the declared patched version in the place of the original version.

The relevant code is in fix-pkgs bash script. The pkgs variable holds a list of lines containing the source package, the patched package and the targeted version.

By convention, the patched package should keep the original name of the project and should have a version-fix tag. Please see pdamoc/core for an example of this.

Testing

./fix-pkgs
ELM_HOME=./elm-stuff/pkgs elm make src/Main.elm

or, by using the included Makefile

make install 
make