Clean quality report repositories CSV file

[m09]

cf further discussion in this issue (that happened before this edition, cf original issue text): Currently, we list the repositories that we use in the quality report in a CSV file that has 3 columns: url, to and from. Only url and from are used. We should therefore remove the to column and rename from to commit_hash.

Original issue text

Excerpt from quality_report_repos.csv:

url,to,from
https://github.com/reduxjs/redux,902484ed735d38aec06683c847810a7218d8dba2,b307091af4d7e846d9e5f080fb81caf4a8b4aab1

In that repo, one of the files we make predictions for (and actually get errors from) is examples/todos-flow/src/__tests__/reducers/visibilityFilter.test.js.

It is present in the from revision:

$ git show b307091af4d7e846d9e5f080fb81caf4a8b4aab1:examples/todos-flow/src/__tests__/reducers/visibilityFilter.test.js
// @flow

import { setVisibilityFilter } from '../../actions/visibilityFilter';
import visibilityFilter from '../../reducers/visibilityFilter';

describe('visibilityFilter', () => {
  it('should handle initial state', () => {
    expect(visibilityFilter(undefined, { type: '@@INIT' })).toEqual('SHOW_ALL');
  });

  it('should handle SET_VISIBILITY_FILTER', () => {
    expect(
      visibilityFilter(undefined, setVisibilityFilter('SHOW_ACTIVE'))
    ).toEqual('SHOW_ACTIVE');
  });
});

but not in the to revision:

$ git show 902484ed735d38aec06683c847810a7218d8dba2:examples/todos-flow/src/__tests__/reducers/visibilityFilter.test.js
fatal: Path 'examples/todos-flow/src/__tests__/reducers/visibilityFilter.test.js' does not exist in '902484ed735d38aec06683c847810a7218d8dba2'

Therefore we should not make predictions for it.

[zurk]

Did you get it from make report-quality?

We do not use to column from the related csv file. Only to make lookout work.
So It uses from column for train and analyze by design.

[m09]

Thanks for the precisions :)

To quote the comment I made on slack:

We should document that we don't use the to column (and probably remove it from csv if possible)

[zurk]

Good point. We should try.
Last time I think about removal it was tricky because it is required to feed two unequal commits to lookout-sdk review call.

[m09]

The from commit and HEAD should work if I remember correctly. from should also probably be renamed to something like rev since it'll be the only one we'll be using.