fix: uBlue OS should be detected as FedoraImmutable (#1043)

* refactor(parse_os_release): Don't rely on specific `ID`s for Fedora Immutable

Instead match `ID=fedora` or `ID_LIKE=fedora` and decide wether or not
the distro is immutable by `VARIANT`.

* feat: add aurora,bluefin,coreos support

The `os_release`s came from the following images:

- ghcr.io/ublue-os/aurora:93f0fd9f20b3
- ghcr.io/ublue-os/bluefin:5d37394a5d4b
- ghcr.io/ublue-os/ucore:63cd1200c344

* fix: bazzite should be detected as FedoraImmutable

* squash me: cargo fmt

---------

Co-authored-by: Steve Lau <stevelauc@outlook.com>

src/steps/os/linux.rs

@@ -60,19 +60,7 @@ impl Distribution {
             Some("wolfi") => Distribution::Wolfi,
             Some("centos") | Some("rhel") | Some("ol") => Distribution::CentOS,
             Some("clear-linux-os") => Distribution::ClearLinux,
-            Some("fedora") => {
+            Some("fedora") => Distribution::match_fedora_variant(&variant),
-                return if let Some(variant) = variant {
-                    match variant {
-                        "Silverblue" | "Kinoite" | "Sericea" | "Onyx" | "IoT Edition" | "Sway Atomic" => {
-                            Ok(Distribution::FedoraImmutable)
-                        }
-                        _ => Ok(Distribution::Fedora),
-                    }
-                } else {
-                    Ok(Distribution::Fedora)
-                };
-            }
-
             Some("nilrt") => Distribution::NILRT,
             Some("nobara") => Distribution::Nobara,
             Some("void") => Distribution::Void,
@@ -109,7 +97,7 @@ impl Distribution {
                     } else if id_like.contains(&"alpine") {
                         return Ok(Distribution::Alpine);
                     } else if id_like.contains(&"fedora") {
-                        return Ok(Distribution::Fedora);
+                        return Ok(Distribution::match_fedora_variant(&variant));
                     }
                 }
                 return Err(TopgradeError::UnknownLinuxDistribution.into());
@@ -117,6 +105,15 @@ impl Distribution {
         })
     }
 
+    fn match_fedora_variant(variant: &Option<&str>) -> Self {
+        if let Some("Silverblue" | "Kinoite" | "Sericea" | "Onyx" | "IoT Edition" | "Sway Atomic" | "CoreOS") = variant
+        {
+            Distribution::FedoraImmutable
+        } else {
+            Distribution::Fedora
+        }
+    }
+
     pub fn detect() -> Result<Self> {
         if PathBuf::from("/bedrock").exists() {
             return Ok(Distribution::Bedrock);
@@ -1288,4 +1285,24 @@ mod tests {
     fn test_nilrt() {
         test_template(include_str!("os_release/nilrt"), Distribution::NILRT);
     }
+
+    #[test]
+    fn test_coreos() {
+        test_template(include_str!("os_release/coreos"), Distribution::FedoraImmutable);
+    }
+
+    #[test]
+    fn test_aurora() {
+        test_template(include_str!("os_release/aurora"), Distribution::FedoraImmutable);
+    }
+
+    #[test]
+    fn test_bluefin() {
+        test_template(include_str!("os_release/bluefin"), Distribution::FedoraImmutable);
+    }
+
+    #[test]
+    fn test_bazzite() {
+        test_template(include_str!("os_release/bazzite"), Distribution::FedoraImmutable);
+    }
 }

src/steps/os/os_release/aurora

@@ -0,0 +1,23 @@
+NAME="Aurora"
+VERSION="latest-41.20250210.4 (Kinoite)"
+RELEASE_TYPE=stable
+ID=aurora
+ID_LIKE="fedora"
+VERSION_ID=41
+VERSION_CODENAME=""
+PLATFORM_ID="platform:f41"
+PRETTY_NAME="Aurora (Version: latest-41.20250210.4 / FROM Fedora Kinoite 41)"
+ANSI_COLOR="0;38;2;60;110;180"
+LOGO=fedora-logo-icon
+CPE_NAME="cpe:/o:universal-blue:aurora:41"
+DEFAULT_HOSTNAME="aurora"
+HOME_URL="https://getaurora.dev/"
+DOCUMENTATION_URL="https://docs.getaurora.dev"
+SUPPORT_URL="https://github.com/ublue-os/aurora/issues/"
+BUG_REPORT_URL="https://github.com/ublue-os/aurora/issues/"
+SUPPORT_END=2025-12-15
+VARIANT="Kinoite"
+VARIANT_ID=aurora
+OSTREE_VERSION='latest-41.20250210.4'
+BUILD_ID="fc1570c"
+IMAGE_ID="aurora"

src/steps/os/os_release/bazzite

@@ -0,0 +1,25 @@
+NAME="Bazzite"
+VERSION="41.20250208.0 (Kinoite)"
+RELEASE_TYPE=stable
+ID=bazzite
+ID_LIKE="fedora"
+VERSION_ID=41
+VERSION_CODENAME="Holographic"
+PLATFORM_ID="platform:f41"
+PRETTY_NAME="Bazzite 41 (FROM Fedora Kinoite)"
+ANSI_COLOR="0;38;2;138;43;226"
+LOGO=bazzite-logo-icon
+CPE_NAME="cpe:/o:universal-blue:bazzite:41"
+DEFAULT_HOSTNAME="bazzite"
+HOME_URL="https://bazzite.gg"
+DOCUMENTATION_URL="https://docs.bazzite.gg"
+SUPPORT_URL="https://discord.bazzite.gg"
+BUG_REPORT_URL="https://github.com/ublue-os/bazzite/issues/"
+SUPPORT_END=2025-12-15
+VARIANT="Kinoite"
+VARIANT_ID=bazzite-nvidia-open
+OSTREE_VERSION='41.20250208.0'
+BUILD_ID="Stable (F41.20250208)"
+BOOTLOADER_NAME="Bazzite Stable (F41.20250208)"
+BUILD_ID="Stable (F41.20250208)"
+BOOTLOADER_NAME="Bazzite Stable (F41.20250208)"

src/steps/os/os_release/bluefin

@@ -0,0 +1,24 @@
+NAME="Bluefin"
+VERSION="41.20250216.1 (Silverblue)"
+RELEASE_TYPE=stable
+ID=bluefin
+ID_LIKE="fedora"
+VERSION_ID=41
+VERSION_CODENAME="Archaeopteryx"
+PLATFORM_ID="platform:f41"
+PRETTY_NAME="Bluefin (Version: 41.20250216.1 / FROM Fedora Silverblue 41)"
+ANSI_COLOR="0;38;2;60;110;180"
+LOGO=fedora-logo-icon
+CPE_NAME="cpe:/o:universal-blue:bluefin:41"
+DEFAULT_HOSTNAME="bluefin"
+HOME_URL="https://projectbluefin.io"
+DOCUMENTATION_URL="https://docs.projectbluefin.io"
+SUPPORT_URL="https://github.com/ublue-os/bluefin/issues/"
+BUG_REPORT_URL="https://github.com/ublue-os/bluefin/issues/"
+SUPPORT_END=2025-12-15
+VARIANT="Silverblue"
+VARIANT_ID=bluefin
+OSTREE_VERSION='41.20250216.1'
+BUILD_ID="185146a"
+IMAGE_ID="bluefin"
+IMAGE_VERSION="41.20250216.1"

src/steps/os/os_release/coreos

@@ -0,0 +1,23 @@
+NAME="Fedora Linux"
+VERSION="41.20250117.3.0 (CoreOS)"
+RELEASE_TYPE=stable
+ID=fedora
+VERSION_ID=41
+VERSION_CODENAME=""
+PLATFORM_ID="platform:f41"
+PRETTY_NAME="Fedora CoreOS 41.20250117.3.0 (uCore)"
+ANSI_COLOR="0;38;2;60;110;180"
+LOGO=fedora-logo-icon
+CPE_NAME="cpe:/o:fedoraproject:fedora:41"
+HOME_URL="https://getfedora.org/coreos/"
+DOCUMENTATION_URL="https://docs.fedoraproject.org/en-US/fedora-coreos/"
+SUPPORT_URL="https://github.com/coreos/fedora-coreos-tracker/"
+BUG_REPORT_URL="https://github.com/coreos/fedora-coreos-tracker/"
+REDHAT_BUGZILLA_PRODUCT="Fedora"
+REDHAT_BUGZILLA_PRODUCT_VERSION=41
+REDHAT_SUPPORT_PRODUCT="Fedora"
+REDHAT_SUPPORT_PRODUCT_VERSION=41
+SUPPORT_END=2025-12-15
+VARIANT="CoreOS"
+VARIANT_ID=coreos
+OSTREE_VERSION='41.20250117.3.0'