When running multiple "inventory" command in //, error log file will be mixing several inventory errors or be deleted.

[pombredanne]

The code in https://github.com/nexB/aboutcode-toolkit/blob/b9c8532396c86f967369785e6f76792e75fa9f16/src/attributecode/cmd.py#L460 either remove or appends content which is yielding surprising results when running multiple inventories in parallel.

[pombredanne]

It could be simpler to have an explicit option to create a log file.

[pombredanne]

We now use a proper filename for each log. Merged and fixed