Fix untracked files being staged when hidden

[navad]

Current version of SourceGit contains an optimization to perform a git add <repo path> operation when the number of files being staged equals the number of changes. While this optimization makes perfect sense, it fails to accommodate for untracked files, if those are marked hidden in the UI ("Include Untracked Files" is disabled)

Before staging:

After staging:

This PR includes a fix to check and make sure there are no untracked files present in the repo before performing this operation in order to avoid adding those unwanted files.

[love-linger]

I've pushed my implementation of this feature. It just uses -u option of git add command to ignore untracked files.

[navad]

Thanks for applying a fix!
git add -u ... will indeed filter out untracked files but might implicitly stage other files, that's why I preferred a more explicit approach in the PR when there are any filtered-out files in the UI

[love-linger]

Current version of SourceGit contains an optimization to perform a git add operation when the number of files being staged equals the number of changes

Why I perfer to use git add [-u] . instead of git add -- <pathspec> ...? Here is the reason:

The --pathspec-from-file=<file> parameter of git add command is added since 2.25.0, which is not the minimal version of git supported by SourceGit. So, we can only use -- <pathspec> ... format. When there are many of file to stage, the argument list can be too long, and may fail on some platform.