From: Yoichi NAKAYAMA <yoichi.nakayama@gmail.com>

Given a state where the cross references between the worktree and the
repository (specifically worktree/id/gitdir in the main repository and
the .git file in the worktree) are recorded using absolute paths,
setting 'worktree.useRelativePaths=true' and running 'git worktree
repair' within the main worktree converts them to relative paths.

On the other hand, given a state where the cross references are
recorded using relative paths, one would expect (by symmetry) that
setting 'worktree.useRelativePath=false' and running 'git worktree
repair' would convert them to absolute paths. However, they remain as
relative paths.

This is because we wrongly use read_gitfile_gently() which always
returns an absolute path. To fix this, introduce read_gitfile_raw()
that is almost same as read_gitfile_gently(), but it skips existence
check of the referenced repository and returns the unmodified path
read from .git file.

Signed-off-by: Yoichi NAKAYAMA <yoichi.nakayama@gmail.com>

Submitted-As: https://lore.kernel.org/git/pull.2205.v2.git.1787240760069.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.2205.git.1786799480344.gitgitgadget@gmail.com