refactor: make script more portable

devc.sh

@@ -9,7 +9,7 @@ set -eu
 log() { printf '\e[%sm%s\e[0m %s\n' "${3:-36}" "${2:-○}" "$1"; }
 arg() { echo -n " $@"; }
 
-# run_args returns the podman run arguments required for
+# run_args returns the container run arguments required for
 # starting a new container.
 default_args() {
   arg "--name $name"
@@ -23,7 +23,7 @@ default_args() {
 
   # Disable selinux labeling so unix sockets can be mounted
   # without problems.
-  arg "--security-opt label=disable"
+  [ -d /sys/fs/selinux ] && arg "--security-opt label=disable"
 
   # Mount the wayland socket. Required to get the system
   # clipboard (wl-copy) and gui applications working.
@@ -42,7 +42,7 @@ default_args() {
   [ -f "$config_file" ] && source "${config_file}"
 }
 
-# param_args returns the podman run arguments based on the
+# param_args returns the container run arguments based on the
 # arguments provided to this script.
 param_args() {
   while test $# -gt 0; do
@@ -53,8 +53,11 @@ param_args() {
       arg "-v /run/user/$UID/bus:/tmp/bus"
       arg "-e HOST_HOME=$HOME" # Used to translate paths.
       ;;
-    -podman-sock) # Mount podman sock into the container.
-      arg "-v /run/user/$UID/podman/podman.sock:/var/run/docker.sock"
+    -container-sock) # Mount container sock into the container.
+      case "$(basename "$engine")" in
+      podman) arg "-v /run/user/$UID/podman/podman.sock:/var/run/docker.sock" ;;
+      docker) arg "-v /var/run/docker.sock:/var/run/docker.sock" ;;
+      esac
       ;;
     -x11) # Enable X11 support.
       arg "-v /tmp/.X11-unix:/tmp/.X11-unix"
@@ -67,7 +70,7 @@ param_args() {
       arg "-w /mnt/"
       arg "-v $1:/mnt/$([ ! -d "$1" ] && echo 'file')"
       ;;
-    *) # Use unknown arguments a podman arguments.
+    *) # Use unknown arguments as container arguments.
       arg "$1" ;;
     esac
     shift
@@ -75,6 +78,9 @@ param_args() {
 }
 
 ### MAIN ###
+engine="$(command -v podman || command -v docker)"
+[ -z "$engine" ] && echo "no container engine found" && exit 1
+
 # Get the devcontainer name from the first argument. If not
 # provided, use the last used name when possible.
 if [[ $# -gt 0 ]] && [[ ${1:-} != -* ]]; then
@@ -107,10 +113,10 @@ fi
 
 # When container is not running or arguments are provided,
 # recreate it.
-if [ "$(podman container inspect "$name" -f {{.State.Running}} 2>&1)" != 'true' ] || [[ $# -gt 0 ]]; then
+if [ "$($engine container inspect "$name" -f {{.State.Running}} 2>&1)" != 'true' ] || [[ $# -gt 0 ]]; then
   log "starting devcontainer..."
-  podman container rm -f -t 0 "$name" 1>/dev/null
-  podman run -td $(default_args) $(param_args $@) "$registry/$image"
+  $engine container rm -f -t 0 "$name" 1>/dev/null
+  $engine run -td $(default_args) $(param_args $@) "$registry/$image"
 fi
 
-podman exec --detach-keys "ctrl-@,ctrl-@" -it "$name" ${DEVC_COMMAND:-}
+$engine exec --detach-keys "ctrl-@,ctrl-@" -it "$name" ${DEVC_COMMAND:-}