fix(windows): Handle root paths that cannot be canonicalized

[alexmoon]

If the root path element of a pattern could not be canonicalized, scope::fs::push_pattern would enter an infinite loop. This is because path.pop() does nothing and returns false when called on a path with no parent, which can happen even when the path element iterator is non-empty. This could occur on Windows, for example, with a pattern of \\?\**.

Fixes #10815

[github-actions]

Package Changes Through 7e5ef79

There are 6 changes which include tauri with prerelease, tauri-runtime-wry with prerelease, tauri-runtime with prerelease, tauri-utils with prerelease, tauri-cli with prerelease, @tauri-apps/cli with prerelease

Planned Package Versions

The following package releases are the planned based on the context of changes in this pull request.

package	current	next
tauri-utils	2.0.0-rc.12	2.0.0-rc.13
tauri-bundler	2.0.1-rc.13	2.0.1-rc.14
tauri-runtime	2.0.0-rc.12	2.0.0-rc.13
tauri-runtime-wry	2.0.0-rc.13	2.0.0-rc.14
tauri-codegen	2.0.0-rc.12	2.0.0-rc.13
tauri-macros	2.0.0-rc.11	2.0.0-rc.12
tauri-plugin	2.0.0-rc.12	2.0.0-rc.13
tauri-build	2.0.0-rc.12	2.0.0-rc.13
tauri	2.0.0-rc.15	2.0.0-rc.16
@tauri-apps/cli	2.0.0-rc.16	2.0.0-rc.17
tauri-cli	2.0.0-rc.16	2.0.0-rc.17

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[alexmoon]

I've added a test case for the various flavors of Windows root paths. I ran into a number of edge cases that are not currently handled well, which I documented in comments in the test case. I can open an issue for those if you would like. A few examples:

• Canonicalization differs depending on if the path exists. For example "C:\Exists" canonicalizes to "\\?\C:\Exists" while "C:\DoesNotExit" is left as is.
• A similar issue affects UNC network share paths. If the network share is present/reachable when a pattern is added you will get different patterns added to the scope than if the share is not present/reachable.
• The path "C:" is different from "C:\" (the former refers to the current working directory of the C drive, while the second refers to the root directory of the C drive). There's effectively no way to pass "C:\" to add_directory because it unconditionally adds a backslash before the wildcards which leads to a pattern like "C:\\**" which doesn't match anything.
• If you add a verbatim path (one that starts with "\\?\"), it won't match non-verbatim paths that refer to the same target.

[amrbashir]

Thank you and apologies for the late reply

[amrbashir]

Thank you. Unfortunately, you don't seem to have commit signing enabled and I can't merge the PR until
it is signed.

You need to setup commit signing, then you can sign past commit like this. git rebase --exec 'git commit --amend --no-edit -n -S' -i dev

[alexmoon]

Sorry about that. My Windows machine doesn't have signing set up.

[amrbashir]

I have a few changes locally while testing this PR, that simplifies the code a bit and adds more documentation. Since I can't push to your branch, I will open a follow up PR. Thanks for your help and the test cases as well.