1 files changed, 35 insertions, 0 deletions
diff --git a/pkgs/build-support/vm/rpm/run-in-uml.sh b/pkgs/build-support/vm/rpm/run-in-uml.sh
new file mode 100644
index 000000000000..3f1c7c0d6e81
--- /dev/null
+++ b/pkgs/build-support/vm/rpm/run-in-uml.sh
@@ -0,0 +1,35 @@
+export > initial-env-vars
+
+source $stdenv/setup
+
+ensureDir $out/nix-support
+echo "$system" > $out/nix-support/system
+cat $image/name > $out/nix-support/name
+cat $image/full-name > $out/nix-support/full-name
+
+echo $PATH > path
+ln -s $boot $NIX_BUILD_TOP/worker # work around a stupid bug (no dots allowed in kernel arguments?)
+
+# UML requires an existing $HOME.
+mkdir dummy
+export HOME=$(pwd)/dummy
+
+# Run UML.
+startLog "uml-run"
+touch log
+tail -n +0 -f log & # show UML output as it appears
+tailPid=$!
+
+echo "running UML using image $image/image ($(cat $image/full-name))"
+linux mem=384M ubd0=cow,$image/image root=/dev/root rootflags=/ rootfstype=hostfs \
+  init="$SHELL $NIX_BUILD_TOP/worker $NIX_BUILD_TOP" con=null || true
+echo "UML finished"
+
+sleep 1 # drain `tail', hacky
+kill $!
+stopLog
+
+if ! test -e success; then
+    echo "UML build script failed"
+    exit 1
+fi