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ProductUpgrader: be extra careful about a copy loop #1672

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merged 3 commits into from
Jun 3, 2020

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derrickstolee
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@derrickstolee derrickstolee commented Jun 2, 2020

The ProductUpgrader makes a backup of the C:\Program Files\GVFS folder before running the install, as a mechanism for backing out a failed upgrade. However, it copies that data into C:\Program Files\GVFS\ProgramData\GVFS.Upgrade\Tools, which can create a copy loop! This affected an actual user.

I'm not sure why this affects that one user but not another. In addition to adding more defensive programming (adding the target of the copy to the list of exclusions), I also added some extra tracing so we can see how these strings differ on this machine.

@derrickstolee derrickstolee marked this pull request as ready for review June 2, 2020 19:17
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The log message said this on the user's machine:

Copying contents of 'C:\\Program Files\\GVFS' to 'C:\\Program Files\\GVFS\\ProgramData\\GVFS.Upgrade\\Tools',excluding 'C:\\Program Files\\GVFS\\ProgramData\\GVFS.Upgrade\\Tools' and 'C:\\Program Files\\GVFS\\ProgramData'

So, not a case issue. I have no idea why this works for most users.

However, this situation did fix the issue for the user with the problem!

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Caveat: I'm not an expert in this area, but from what I gather via the commit messages, the PR description and the diffs, this looks correct.

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The log message said this on the user's machine:

Copying contents of 'C:\\Program Files\\GVFS' to 'C:\\Program Files\\GVFS\\ProgramData\\GVFS.Upgrade\\Tools',excluding 'C:\\Program Files\\GVFS\\ProgramData\\GVFS.Upgrade\\Tools' and 'C:\\Program Files\\GVFS\\ProgramData'

So, not a case issue. I have no idea why this works for most users.

Because IT DOESN'T WORK. This means gvfs upgrade is completely broken for 1.0.20112.1 and later. :(

derrickstolee added a commit that referenced this pull request Jun 2, 2020
…opy loop

The `ProductUpgrader` makes a backup of the `C:\Program Files\GVFS` folder before running the install, as a mechanism for backing out a failed upgrade. However, it copies that data into `C:\Program Files\GVFS\ProgramData\GVFS.Upgrade\Tools`, which can create a copy loop! This affected an actual user.

I'm not sure why this affects that one user but not another. In addition to adding more defensive programming (adding the target of the copy to the list of exclusions), I also added some extra tracing so we can see how these strings differ on this machine.

See #1672 for the master PR.
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I'm going to add documentation into the troubleshooting.md doc before I merge this into master, but I'll wait for a new version number before pushing those changes. The HOTFIX is merged so I am moving forward with the release process.

…...-
Checking for GVFS upgrades...\
Checking for GVFS upgrades...\
Checking for GVFS upgrades...|
Checking for GVFS upgrades...|
Checking for GVFS upgrades...Succeeded

New version 1.0.19346.2 is available.

Upgrade will unmount and remount gvfs repos, ensure you are at a stopping point.
When ready, run `gvfs upgrade --confirm` from an elevated command prompt. bug

Signed-off-by: Derrick Stolee <[email protected]>
@derrickstolee derrickstolee merged commit a35b592 into microsoft:master Jun 3, 2020
derrickstolee added a commit that referenced this pull request Jul 28, 2020
Major Updates
-----------------

* Comes with Git for Windows 2.28.0
* Previous builds were not including fully-signed DLLs. This is now fixed.

Pull Requests
---------------

* #1672: ProductUpgrader: be extra careful about a copy loop
* #1674: Config: disable status.submoduleSummary
* #1675: PreCommandHook: don't lock pack-objects 
* #1676: Update Git to v2.27.0.vfs.1.0 
*  #1679: BuildGVFSForWindows.bat: use nuget on PATH
* #1683: GVFS.SignFiles.csproj: include more DLLs for signing
* #1685: minor path comparison fixup in ProductUpgrader
*  #1682: Update Git to v2.28.0
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