Problem unlinking when checking out individual files

[garimasi514]

Local Repro

C:\gvfs_repos>gvfs clone https://gvfs.visualstudio.com/ci/_git/ForTests ft
Clone parameters:
Repo URL: https://gvfs.visualstudio.com/ci/_git/ForTests
Branch: Default
Cache Server: Default
Local Cache: C:.gvfsCache
Destination: C:\gvfs_repos\ft
Authenticating...Succeeded
Querying remote for config...Succeeded
Using cache server: None (https://gvfs.visualstudio.com/ci/_git/ForTests)
Cloning...Succeeded
Fetching commits and trees from origin (no cache server)...Succeeded
Validating repo...Succeeded
Mounting...Succeeded
Registering for automount...Succeeded

C:\gvfs_repos>cd ft\src

C:\gvfs_repos\ft\src>git status
On branch master
Your branch is up to date with 'origin/master'.

nothing to commit, working tree clean

C:\gvfs_repos\ft\src>git checkout origin/FunctionalTests/20180214 -- Readme.md
error: unable to unlink old 'Readme.md': No such file or directory

C:\gvfs_repos\ft\src>type Readme.md >..\test.txt

C:\gvfs_repos\ft\src>git checkout origin/FunctionalTests/20180214 -- Readme.md
error: pathspec 'Readme.md' did not match any file(s) known to git

C:\gvfs_repos\ft\src>git checkout --ignore-skip-worktree-bits origin/FunctionalTests/20180214 -- Readme.md

[garimasi514]

@kewillford was able to workaround this by reading the file to bring it on disk and then using --ignore-skip-worktree-bits on the checkout as shown in the repro above. @jrbriggs as FYI

[kewillford]

This command seems to still be doing the correct thing even though the error: message was shown since the file gets updated in the index and status is the same as when the command is ran on a non-VFS for Git repo, so this issue is really that an error is being shown to the user with the git command when it doesn't get shown in a non-VFS for Git repo.

VFS for Git

C:\gvfs_repos\ft\src>git checkout origin/FunctionalTests/20180214 -- Readme.md
error: unable to unlink old 'Readme.md': No such file or directory

C:\gvfs_repos\ft\src>git status
On branch master
Your branch is up to date with 'origin/master'.

Changes to be committed:
  (use "git restore --staged <file>..." to unstage)
        modified:   Readme.md

Not VFS

C:\git_tests>git clone https://gvfs.visualstudio.com/ci/_git/ForTests ft
Cloning into 'ft'...
remote: Azure Repos
remote: Found 3264 objects to send. (30 ms)
Receiving objects: 100% (3264/3264), 1.43 MiB | 5.86 MiB/s, done.
Resolving deltas: 100% (1601/1601), done.

C:\git_tests>cd ft

C:\git_tests\ft>git checkout origin/FunctionalTests/20180214 -- Readme.md

C:\git_tests\ft>git status
On branch master
Your branch is up to date with 'origin/master'.

Changes to be committed:
  (use "git restore --staged <file>..." to unstage)
        modified:   Readme.md