Re: `git diff` after `git checkout from-branch -- files` reports nothing

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I didn't know this about `git diff`. Thanks for the info!

On Tue, Nov 30, 2021 at 1:39 PM Bryan Turner <bturner@xxxxxxxxxxxxx> wrote:
>
> On Tue, Nov 30, 2021 at 12:49 PM Noel Yap <noel.yap@xxxxxxxxx> wrote:
> >
> > Thank you for filling out a Git bug report!
> > Please answer the following questions to help us understand your issue.
> >
> > What did you do before the bug happened? (Steps to reproduce your issue)
> >
> > `git checkout -b to-branch; git checkout from-branch -- filenames; git
> > status; git diff`
>
> "git diff" as run here by default only shows _unstaged_ changes. Since
> you ran "git checkout from-branch -- filenames", those changes were
> _staged_. That means you'd need "git diff --cached" or "git diff
> --staged" to see them.
> >
> > What did you expect to happen? (Expected behavior)
> >
> > `git status` expected to show updated files and `git diff` expected to
> > show file changes.
> >
> > What happened instead? (Actual behavior)
> >
> > `git status` showed updated files but `git diff` showed no file changes.
>
> "git status" compares the working copy to the index, so it will always
> show the changes, but it has 2 different blocks, staged and unstaged
> changes. If your changes appear in the staged block, you need "git
> diff --cached" or "git diff --staged". If they're in the unstaged
> block, they'll be visible in "git diff".
>
> >
> > What's different between what you expected and what actually happened?
> >
> > `git diff` was expected to show file changes but it showed nothing instead.
> >
> > Anything else you want to add:
> >
> > If I `git reset -q HEAD -- filenames`, `git diff` starts showing file changes.
>
> This unstaged the changes, at which point they show in a plain "git
> diff". They also would move from the staged block to the unstaged
> block in your "git status" output.
>
> As far as I can tell everything is working as intended.
>
> Hope this helps,
> Bryan Turner
>
> >
> > Please review the rest of the bug report below.
> > You can delete any lines you don't wish to share.
> >
> >
> > [System Info]
> > git version:
> > git version 2.34.1
> > cpu: x86_64
> > no commit associated with this build
> > sizeof-long: 8
> > sizeof-size_t: 8
> > shell-path: /bin/sh
> > uname: Linux 5.11.0-36-generic #40~20.04.1-Ubuntu SMP Sat Sep 18
> > 02:14:19 UTC 2021 x86_64
> > compiler info: gnuc: 9.3
> > libc info: glibc: 2.31
> > $SHELL (typically, interactive shell): /bin/bash
> >
> >
> > [Enabled Hooks]
> > applypatch-msg
> > commit-msg
> > post-applypatch
> > post-checkout
> > post-commit
> > post-merge
> > post-receive
> > post-rewrite
> > post-update
> > pre-applypatch
> > pre-auto-gc
> > pre-commit
> > pre-merge-commit
> > pre-push
> > pre-rebase
> > pre-receive
> > prepare-commit-msg
> > push-to-checkout
> > sendemail-validate
> > update



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