Migration to Bazel

@regisd is attempting to migrate the build of JFlex from Maven to Bazel.

Environnement

https://github.com/jflex-de/jflex/pull/395

jflex-maven-plugin

Bazel Rule instead

status: very easy, done PR #401

See bazel_rules

plugin itself

status: hard, not started

Ideally, we need to infer the deps to generate a pom.xml

Examples

status: Very easy, done on "simple". PR #401

CUP

cup Bazel rule

status: Easy, done. PR #442

cup-maven-plugin

status: obsolete, won't do

Jflex itself

status: easy (once cup rule and jflex rule are done), done PR #444

jflex-testsuite-maven-plugin

status: obsolete, won't do

testsuite

status: hard, WIP