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use std::process::Command;
/// Detect the Linux distribution from the system,
/// using system-specific release files and falling
/// back to lsb_release.
pub(crate) fn detect_linux_distribution() -> String {
detect_from_os_release()
.or_else(detect_from_debian_version)
.or_else(detect_from_centos_release)
.or_else(detect_from_redhat_release)
.or_else(detect_from_fedora_release)
.or_else(detect_from_arch_release)
.or_else(detect_from_alpine_release)
.or_else(detect_from_suse_release)
.or_else(detect_from_lsb_release)
.unwrap_or_else(|| "Unknown".to_string())
}
fn detect_from_os_release() -> Option<String> {
let content = std::fs::read_to_string("/etc/os-release").ok()?;
content
.lines()
.find(|l| l.starts_with("PRETTY_NAME="))
.and_then(|l| l.split_once('=').map(|s| s.1))
.map(|s| s.trim_matches('"').to_string())
}
fn detect_from_debian_version() -> Option<String> {
std::fs::read_to_string("/etc/debian_version")
.ok()
.map(|v| format!("Debian {}", v.trim()))
}
fn detect_from_centos_release() -> Option<String> {
std::fs::read_to_string("/etc/centos-release")
.ok()
.map(|v| v.trim().to_string())
}
fn detect_from_redhat_release() -> Option<String> {
std::fs::read_to_string("/etc/redhat-release")
.ok()
.map(|v| v.trim().to_string())
}
fn detect_from_fedora_release() -> Option<String> {
std::fs::read_to_string("/etc/fedora-release")
.ok()
.map(|v| v.trim().to_string())
}
fn detect_from_arch_release() -> Option<String> {
std::fs::read_to_string("/etc/arch-release")
.ok()
.filter(|v| !v.trim().is_empty())
.map(|_| "Arch Linux".to_string())
}
fn detect_from_alpine_release() -> Option<String> {
std::fs::read_to_string("/etc/alpine-release")
.ok()
.map(|v| format!("Alpine {}", v.trim()))
}
fn detect_from_suse_release() -> Option<String> {
std::fs::read_to_string("/etc/SuSE-release")
.ok()
.and_then(|content| content.lines().next().map(|l| l.trim().to_string()))
}
fn detect_from_lsb_release() -> Option<String> {
let output = Command::new("lsb_release").arg("-a").output().ok()?;
if !output.status.success() {
return None;
}
let output = String::from_utf8(output.stdout).ok()?;
linux_distro_from_lsb_release(&output)
}
fn linux_distro_from_lsb_release(output: &str) -> Option<String> {
output
.lines()
.find(|line| line.starts_with("Description:"))
.and_then(|line| line.split_once(':').map(|s| s.1))
.map(|s| s.trim().to_string())
}
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