RFE: Compare version of a file across commits

Created by: mike-r-mclaughlin

Requested by: https://github.com/sourcegraph/accounts/issues/6716 via Slack

Feature request description

The key point of this feature request is to focus on an individual file, and compare versions of that file across commits. The option to pick two commits would be nice, but more important would be the ability to step left / right through the versions of the file.

Is your feature request related to a problem? If so, please describe.

Not a “problem” like a bug in the app, but a problem in that, you need a lot of different Git tools to work efficiently.

I’d like to compare two files, two of any files, at any revision, including two revisions of the same file, but the starting point for this RFE is to see a commit-by-commit history of a file play out over time, by flipping left (back in history) or right (forward in history).

Perforce’s P4V's Time-lapse view is one of the best diff views I’ve seen so far, and haven’t found a comparable one for Git yet.

Additional context

Similar to:

• https://github.githistory.xyz/sourcegraph/sourcegraph/blob/main/README.md
• https://marketplace.visualstudio.com/items?itemName=pomber.git-file-history