Make difftool work for any diff

[borekb]

VSCode is great for viewing diffs of most files but for example Markdown files with long lines are very hard to make sense of. In such cases, an external diff tool would be very helpful.

GitLens already provides this for uncommitted / staged files since #154 but I'd also like to have it in other "compare" contexts, like browsing a history of a file, the quick pick menus, etc. What do you think?

[eamodio]

Sounds like a great suggestion -- thanks!

[rattrayalex-stripe]

We'd also like to be able to view the entire diff in a single editor tab (similar to traditional git diff output, but with VSCode's beautiful side-by-side view). Would that be part of this feature, or best as a separate issue?

[eamodio]

@rattrayalex-stripe You can switch vscode into a single editor diff (i.e. inline) today -- it is in the ... menu in the tab bar or via the toggle.diff.editorMode command (but it doesn't seem to be exposed in the command palette).

[rattrayalex-stripe]

Oops, sorry for being unclear – I meant viewing the diffs of multiple files in the same editor tab.

For example, if I execute a codemod or find/replace across 100 files, I would like a single tab through which to scroll to verify my changes. For this purpose, I actually quite like the side-by-side view in VSCode.

My hunch is that if VSCode can handle arbitrary diff outputs for display, it can do this.

However, now that I read this issue more carefully, I see that it is roughly the inverse of what I want. EDIT: opened in #404.

Sorry for distracting here.

[eamodio]

@rattrayalex-stripe no worries thanks for the clarification

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