Invalid assertion error: "Can't merge/copy source into subdirectory of itself"

[mausch]

The check in https://github.com/conda/conda-build/blob/master/conda_build/utils.py#L194 causes invalid AssertionErrors in some cases.

I have this build where the source is in /xxx which causes the build to fail with

Copying /xxx to /opt/conda/conda-bld/xxx_1479725365157/work

Traceback (most recent call last):
  File "/opt/conda/bin/conda-build", line 6, in <module>
    sys.exit(conda_build.cli.main_build.main())
  File "/opt/conda/lib/python3.4/site-packages/conda_build/cli/main_build.py", line 247, in main
    execute(sys.argv[1:])
  File "/opt/conda/lib/python3.4/site-packages/conda_build/cli/main_build.py", line 239, in execute
    already_built=None, config=config, noverify=args.no_verify)
  File "/opt/conda/lib/python3.4/site-packages/conda_build/api.py", line 77, in build
    need_source_download=need_source_download, config=config)
  File "/opt/conda/lib/python3.4/site-packages/conda_build/build.py", line 1088, in build_tree
    config=recipe_config)
  File "/opt/conda/lib/python3.4/site-packages/conda_build/build.py", line 652, in build
    config=config)
  File "/opt/conda/lib/python3.4/site-packages/conda_build/render.py", line 86, in parse_or_try_download
    source.provide(metadata.path, metadata.get_section('source'), config=config)
  File "/opt/conda/lib/python3.4/site-packages/conda_build/source.py", line 500, in provide
    copy_into(path, config.work_dir, config.timeout)
  File "/opt/conda/lib/python3.4/site-packages/conda_build/utils.py", line 95, in copy_into
    merge_tree(src, dst, symlinks, timeout=timeout, lock=lock)
  File "/opt/conda/lib/python3.4/site-packages/conda_build/utils.py", line 194, in merge_tree
    assert src not in dst, ("Can't merge/copy source into subdirectory of itself.  Please create "
AssertionError: Can't merge/copy source into subdirectory of itself.  Please create separate spaces for these things.

which is obviously invalid.

This check was introduced in b7845f8 .

Workarounds:

• downgrade to conda-build 2.0.1, or
• make sure that the source dir is not a substring of that target dir

[msarahan]

Thanks, I will try to refine the match.

[github-actions]

Hi there, thank you for your contribution!

This issue has been automatically locked because it has not had recent activity after being closed.

Please open a new issue if needed.

Thanks!