jaslkdfj

rootfs.nix

@@ -0,0 +1,28 @@
+{
+  closureInfo, runCommand,
+  e2fsprogs,
+  pigeon-toolchain,
+  pigeon-disc-size ? "1G",
+  pigeon-init,
+  pigeon-run
+}:
+
+let
+  closure = closureInfo { rootPaths = [ toolchain ]; };
+in
+  runCommand "pigeon-rootfs" { nativeBuildInputs = [ e2fsprogs ]; } ''
+    mkdir -p rootfs && cd rootfs
+    mkdir -p dev proc sys tmp usr nix/store root/student root/grader root/results
+    chmod 700 root
+
+    for FILE in $(cat ${closure}/store-paths); do
+      cp -a "$FILE" nix/store
+    done
+    ln -s ${pigeon-toolchain}/bin bin
+    ln -s ${pigeon-toolchain}/bin usr/bin
+    install -m 755 ${pigeon-init}/bin/pigeon-init init
+    install -m 755 ${pigeon-run}/bin/pigeon-run run
+
+    cd ..
+    mkfs.ext4 -q -F -d rootfs $out ${pigeon-disc-size}
+  ''