feat(os): support NI Linux Real-Time's opkg package manager (#870)

NI Linux Real-Time is a Yocto Linux-based distribution used with
NI's embedded and real-time controllers.

Related links:
- https://www.ni.com/en/shop/linux/introduction-to-ni-linux-real-time.html
- https://github.com/ni/nilrt
- https://github.com/ni/nilrt-docs

src/steps/os/linux.rs

@@ -30,6 +30,7 @@ pub enum Distribution {
     FedoraImmutable,
     Debian,
     Gentoo,
+    NILRT,
     OpenMandriva,
     OpenSuseTumbleweed,
     PCLinuxOS,
@@ -71,6 +72,7 @@ impl Distribution {
                 };
             }
 
+            Some("nilrt") => Distribution::NILRT,
             Some("nobara") => Distribution::Nobara,
             Some("void") => Distribution::Void,
             Some("debian") | Some("pureos") | Some("Deepin") | Some("linuxmint") => Distribution::Debian,
@@ -158,6 +160,7 @@ impl Distribution {
             Distribution::OpenMandriva => upgrade_openmandriva(ctx),
             Distribution::PCLinuxOS => upgrade_pclinuxos(ctx),
             Distribution::Nobara => upgrade_nobara(ctx),
+            Distribution::NILRT => upgrade_nilrt(ctx),
         }
     }
 
@@ -285,6 +288,14 @@ fn upgrade_nobara(ctx: &ExecutionContext) -> Result<()> {
     Ok(())
 }
 
+fn upgrade_nilrt(ctx: &ExecutionContext) -> Result<()> {
+    let sudo = require_option(ctx.sudo().as_ref(), REQUIRE_SUDO.to_string())?;
+    let opkg = require("opkg")?;
+
+    ctx.run_type().execute(sudo).arg(&opkg).arg("update").status_checked()?;
+    ctx.run_type().execute(sudo).arg(&opkg).arg("upgrade").status_checked()
+}
+
 fn upgrade_fedora_immutable(ctx: &ExecutionContext) -> Result<()> {
     let ostree = require("rpm-ostree")?;
     let mut command = ctx.run_type().execute(ostree);
@@ -1254,4 +1265,9 @@ mod tests {
     fn test_nobara() {
         test_template(include_str!("os_release/nobara"), Distribution::Nobara);
     }
+
+    #[test]
+    fn test_nilrt() {
+        test_template(include_str!("os_release/nilrt"), Distribution::NILRT);
+    }
 }