feature: Install binaries atomically

[NobodyXu]

This PR added a new function helpers::atomic_install and used it in bins::BinFile::install_bin.

helpers::atomic_install first attempts to use rename to atomically install the file.
When rename fails, it will switch to the fallback, which uses tempfile::NamedTempFile to create a named temporary file at the parent of dst, std::io::copy the src into the tempfile, then persist the named tempfile to dst atomically.

It also added a new function helpers::atomic_symlink_file and used it in bins::BinFile::install_link.

It creates a tempfile::TempPath, create a symlink with the TempPath as the linkname, then persist it to link.

Signed-off-by: Jiahao XU [email protected]

[passcod]

Not pulling this into release just yet.

As a side note, just to have it documented somewhere in the project, I've recently learned that symlinks on Windows only "work" when developer mode is enabled at an OS level, which explains the mysterious issue with them not working for one person earlier this year, but being fine in CI and when trying locally. Something to keep in mind when touching this...

[NobodyXu]

I've recently learned that symlinks on Windows only "work" when developer mode is enabled at an OS level

Oh my god... Looks like it is better to disable symlink on windows by default and simply copy the binaries over.