linter does not support dep5 of git submodules #163
Description
Steps to reproduce
Create a new reuse project under git. Add a git submodule which is compliant with the reuse specification, but covers some files with debian's dep5 mechanism. If you run the linter on the parent directory (not the submodule), it will complain that the submodule is not reuse complaint.
Example
Let's create an empty git repo first, add the submodule and check its complaincy:
danielmorandini@jecoz ~ % git init reuse-test && cd reuse-test
Initialized empty Git repository in /Users/danielmorandini/reuse-test/.git/
danielmorandini@jecoz reuse-test % git submodule add https://github.com/kim-company/pmux.git
Cloning into '/Users/danielmorandini/reuse-test/pmux'...
remote: Enumerating objects: 27, done.
remote: Counting objects: 100% (27/27), done.
remote: Compressing objects: 100% (22/22), done.
remote: Total 421 (delta 5), reused 20 (delta 3), pack-reused 394
Receiving objects: 100% (421/421), 2.29 MiB | 4.13 MiB/s, done.
Resolving deltas: 100% (194/194), done.
danielmorandini@jecoz reuse-test % cd pmux
danielmorandini@jecoz pmux % reuse lint
# SUMMARY
* Bad licenses:
* Missing licenses:
* Unused licenses:
* Used licenses: MIT
* Read errors: 0
* Files with copyright information: 22 / 22
* Files with license information: 22 / 22
Congratulations! Your project is compliant with version 3.0 of the REUSE Specification :-)
Now make a step back and check from the parent git repo.
danielmorandini@jecoz pmux % cd ..
danielmorandini@jecoz reuse-test % reuse lint
# MISSING COPYRIGHT AND LICENSING INFORMATION
The following files have no copyright and licensing information:
* .gitmodules
* pmux/README.md
* pmux/examples/config.json
* pmux/go.mod
* pmux/go.sum
# MISSING LICENSES
'MIT' found in:
* pmux/.gitignore
* pmux/.goreleaser.yml
* pmux/cmd/root.go
* pmux/cmd/server.go
* pmux/cmd/wrap.go
* pmux/examples/list-sessions.go
* pmux/examples/mockcmd/main.go
* pmux/http/pmuxapi/handlers.go
* pmux/http/pmuxapi/router.go
* pmux/http/pwrapapi/router.go
* pmux/http/pwrapapi/server.go
* pmux/main.go
* pmux/makefile
* pmux/pwrap/pwrap.go
* pmux/pwrap/pwrap_test.go
* pmux/pwrap/ucb.go
* pmux/tmux/tmux.go
* pmux/tmux/tmux_test.go
# SUMMARY
* Bad licenses:
* Missing licenses: MIT
* Unused licenses:
* Used licenses:
* Read errors: 0
* Files with copyright information: 18 / 23
* Files with license information: 18 / 23
Unfortunately, your project is not compliant with version 3.0 of the REUSE Specification :-(
Hint
I'm not a python fan and I did not dig into the code, but it looks like reuse is not taking into consideration nested .reuse folders.
Context
OS: Darwin jecoz.local 19.2.0 Darwin Kernel Version 19.2.0: Sat Nov 9 03:47:04 PST 2019; root:xnu-6153.61.1~20/RELEASE_X86_64 x86_64
reuse version: reuse 0.5.2