maven dependencies don't show up in runfiles of haskell binaries

[facundominguez]

When adding dependencies created with maven_install to a haskell_binary, the jars are missing from the runfiles.

Here's a minimal reproducer

git clone https://github.com/facundominguez/bug-reports -b fd/bazel-maven-haskell
cd bug-reports
nix-shell --pure --run "bazel build //..."
find -L bazel-bin -name "*collection*.jar"

The last find command produces

bazel-bin/main@[email protected]/io_tweag_inline_java/external/maven/v1/https/repo1.maven.org/mave
n2/org/apache/commons/commons-collections4/4.1/commons-collections4-4.1.jar
bazel-bin/main@[email protected]/maven/v1/https/repo1.maven.org/maven2/org/apache/commons/commons-
collections4/4.1/commons-collections4-4.1.jar

whereas I would expect commons-collections4-4.1.jar to appear in the runfiles of the binary.

Environment

• OS name + version: centos7
• Bazel version: 3.3.1
• Version of the rules: recent master 6e05343b

[Xophmeister]

Update: I can still reproduce this with bazel 4.1.0 and rules_haskell 0.14. Presumably the expectation is by virtue of this code. It would be worth checking whether this just happens with Maven dependencies; that seems oddly specific...