fix: ensure file type bit is set for rpm bundle

[acrilique]

TLDR: By using the permissions() method of FileOptionsBuilder (which was added in version 0.20.0 of the rpm crate) instead of the mode() method, we fix a bug where newer versions of rpm (the package, not the crate) would fail when installing the bundle.

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The generated rpm files failed to install in fedora 43:

>>> [RPM] unpacking of archive failed at file /usr/bin/pino;69d538ca: cpio:
>>> Unpacking error: pino-0:0.2.2-1.x86_64

The issue seems to stem from lines of code that call rpm::FileOptionsBuilder::mode(), e.g.:

rpm::FileOptions::new(dest_bin).mode(0o755)

Which causes the files inside the bundle to lack the file type bit, for instance these are the files inside my rpm package:

./usr/bin/pino                                          mode=0o000755 
./usr/share/applications/pino.desktop                   mode=0o000644 
./usr/share/icons/hicolor/128x128/apps/pino.png         mode=0o000644 
./usr/share/icons/hicolor/256x256/apps/pino.png         mode=0o000644 

Assuming that this code was added to dioxus by copying code from tauri, I wondered why would tauri have that incorrect code. Turns out older versions of rpm (like version 4.18 which is in the ubuntu 24.04 packages repo) do not enforce this specific bit, and do not fail when it's not set. Fedora provides a much newer version (6.0.1 on my system) which must have added a check for that.

Conveniently enough, the rpm crate just added a rpm::FileOptionsBuilder::permissions() method which does exactly what mode should be doing according to our syntax. From docs.rs:

pub fn permissions(self, permissions: u16) -> Self

Set the permission bits for the file without changing the file type.
This is the preferred way to set permissions. Unlike mode(), you only need to provide the permission bits (e.g. 0o755) without the file type prefix.
Values greater than 0o7777 will be masked to fit.

So basically the issue is fixed if we bump the rpm crate version and replace all lines like:

rpm::FileOptions::new(dest_bin).mode(0o755)

with:

rpm::FileOptions::new(dest_bin).permissions(0o755)

[jkelleyrtp]

Thanks!