local_jar.bucklet

#
# If a dependent library is undergoing active development it must be
# recompiled and the change must be reflected in the Buck build process. For
# example testing Gerrit against changed JGit snapshot version. After building
# JGit library, the artifacts are created in local Maven build directory.
#
# To shorten that workflow and take the installation of the artifacts to the
# local Maven repository and fetching it again from there out of the picture,
# `local_jar()` method is used:
#
# local_jar(
#   name = 'jgit',
#   jar = '/home/<user>/projects/jgit/org.eclipse.jgit/target/org.eclipse.jgit-3.3.0-SNAPSHOT.jar',
#   src = '/home/<user>/projects/jgit/org.eclipse.jgit/target/org.eclipse.jgit-3.3.0-SNAPSHOT-sources.jar',
#   deps = [':ewah']
# )

def local_jar(
    name,
    jar,
    src = None,
    deps = [],
    visibility = ['PUBLIC']):
  binjar = name + '.jar'
  srcjar = name + '-src.jar'
  genrule(
    name = name + '__local_bin',
    cmd = 'ln -s %s $OUT' % jar,
    out = binjar)
  if src:
    genrule(
      name = name + '__local_src',
      cmd = 'ln -s %s $OUT' % src,
      out = srcjar)
    prebuilt_jar(
      name = name + '_src',
      deps = [':' + name + '__local_src'],
      binary_jar = genfile(srcjar),
      visibility = visibility,
    )
  else:
    srcjar = None

  prebuilt_jar(
    name = name,
    deps = deps + [':' + name + '__local_bin'],
    binary_jar = genfile(binjar),
    source_jar = genfile(srcjar) if srcjar else None,
    visibility = visibility,
  )