git > 2.10.1 fails to update index on macOS 10.14.5

After upgrading my work station, I found in git-2.22 that git would not 
recognize any file changes until I ran  `git reset --hard`. I thought 
that it was a problem with my own settings.
	However I upgraded to git-2.25, and the problem actually got worse. In 
2.25 the index still failed to update, but `git reset --hard` no longer 
had any effect.

I have not looked to find exactly where the breaking change was introduced, but I have since downgraded to git-2.10.1 and now get the expected behavior.

On 2020-03-23 at 14:37:30, Jonathan Smalls wrote:

I have a bunch of colleagues who use the latest Git on macOS, so I expect it does work most of the time. Let's see if we can figure out what's going on here.

What exactly do you mean by "doesn't recognize any file changes"? Can you tell us what commands you ran and what you expected to see, and what you actually saw? That information would be helpful for us to track down what might be happening.

Also, are you using any specific workflow or tool that might be related? Are you using an editor integration or GUI, and if so, does this happen without that editor integration or GUI as well?

On 3/23/20 19:13, brian m. carlson wrote:

In git-2.22:

I would write a change to a file. Running `git status` would return that 
the working directory was clean, and `git commit .` would show that 
there were no changes to commit.
	However I could target a specific file like `git commit test.txt`, and 
git would successfully recognize the change, and write the commit. I 
could also run `git reset --hard`, and that would update the index to 
reflect the change that I had just written rather than resetting the 
working directory to match the latest commit. If I ran `git reset 
--hard` a second time, that command would reset the working directory.

In normal operation, I would expect to `git status` to recognize a change in a file once it had already been added to the index. I would expect `git commit .` to commit all files in the current directory, and subdirectories without having to specify their file names. I would expect `git reset --hard` to revert the working directory to match the latest commit the first time.

In git-2.25

I would write a change to a file. `git status` would continue to show 
that the working directory was clean, but I was not longer able to 
target a particular file to force a commit. `git reset --hard` had no 
effect, and still showed that the working directory was clean without 
resetting the working directory.
	To successfully commit a file I would have to run `git rm --cached 
test.txt` to target a file, and then `git add test.txt` for git to 
update its index, and recognize the change.

I would expect the same normal operation in git-2.25.

I use git on the command line, so there should be no external interference with its normal function.

On 2020-03-24 at 01:36:18, Jonathan Smalls wrote:

Does running "ls -l" on the file before and after show different timestamps and file sizes? Does "git config -l | grep -iE 'checkstat|ctime'" show anything? Can you use the stat(1) command to tell us whether the change results in a device or inode number change (if that's possible using the macOS version)?

I also need to specify, it looks like I was on git version 2.21.0, not 2.22.0.

On 3/24/20 19:59, brian m. carlson wrote:

Changing the index file updated the file modification time appropriately.

--

Mar30 0715.19 [jsmalls:~/Documents … c310/lorenzCurve] master+
     >> vim index.py

     Mar30 0715.31 [jsmalls:~/Documents … c310/lorenzCurve] master+ 8s
     >> ls -l
total 56
-rw-r--r--  1 jsmalls  staff   1650 Mar 30 07:15 index.py
-rw-r--r--@ 1 jsmalls  staff  16878 Mar 29 20:10 lorenzCurve.png
-rw-r--r--@ 1 jsmalls  staff   1800 Mar 26 09:05 pop2010.npy

Does "git config -l | grep -iE 'checkstat|ctime'"

The git config command returns an empty result. I am not sure what I should see in the stat command, but I have included the result here.

--

Mar30 0715.40 [jsmalls:~/Documents … c310/lorenzCurve] master+
     >> git config -l | grep -iE 'checkstat|ctime'

     Mar30 0716.19 [jsmalls:~/Documents … c310/lorenzCurve] master+ 1
     >> stat
1054203952 723 crw--w---- 1 jsmalls tty 268435456 0 "Mar 30 07:16:43 
2020" "Mar 30 07:16:43 2020" "Mar 30 07:16:43 2020" "Dec 31 19:00:00 
1969" 131072 0 0 (stdin)