debvm-create: allow running without unshare again

In a CI-environment such as salsa-ci, we tend to run as root and want
--mode=root rather than --mode=unshare.

1 files changed, 15 insertions, 4 deletions

diff --git a/bin/debvm-create b/bin/debvm-create
index b93fa23..a8d5727 100755
--- a/bin/debvm-create
+++ b/bin/debvm-create
@@ -303,12 +303,17 @@ fi
 # construct mmdebstrap options as $@:
 set -- \
 	--verbose \
-	--mode=unshare \
 	--variant=apt \
 	"--format=$MMFORMAT" \
 	'--customize-hook=echo "LABEL=debvm / ext4 defaults 0 0" >"$1/etc/fstab"' \
 	"$@"
 
+if test "$(id -u)" = 0; then
+	set -- --mode=root "$@"
+else
+	set -- --mode=unshare "$@"
+fi
+
 if test -n "$ARCHITECTURE"; then
 	set -- "--architecture=$ARCHITECTURE" "$@"
 fi
@@ -394,9 +399,15 @@ if ! check_skip autologin; then
 	set -- "--customize-hook=$SHARE_DIR/customize-autologin.sh" "$@"
 fi
 
-run_inside_userns() {
-	unshare --user --map-auto --map-user=65536 --map-group=65536 --keep-caps -- "$@"
-}
+if test "$(id -u)" = 0; then
+	run_inside_userns() {
+		"$@"
+	}
+else
+	run_inside_userns() {
+		unshare --user --map-auto --map-user=65536 --map-group=65536 --keep-caps -- "$@"
+	}
+fi
 
 TEMPROOT=
 cleanup() {