miaou-exec can call miaou-bash

tools/miaou-exec

@@ -2,52 +2,65 @@
 
 # CONSTANTS
 
-BASEDIR=$(dirname "$0")
-CONTAINER=
-COMMAND_LINE=()
-
 # FUNCTIONS
 
 function usage {
+  local basename
+  basename=$(basename "$0")
   echo Usage:
-  echo -e "\t$(basename "$0") <CONTAINER_NAME> [--] <COMMAND>"
+  echo -e "\t$basename <CONTAINER_NAME> [--] <COMMAND>"
+  echo -e "\t(PIPE or HEREDOC are allowed too)"
   echo
   echo "Examples:"
-  echo -e "\t$(basename "$0") container1 uptime"
-  echo -e "\t$(basename "$0") container1 -- ls -la"
-  echo -e "\t$(basename "$0") container1 -- bash <<EOF\n\t\tls -l\n\t\tuptime\n\tEOF"
+  echo -e "\t$basename container1 uptime"
+  echo -e "\t$basename container1 -- ls -la"
+  echo -e "\techo 'uptime' | $basename container1 # (PIPE usage)"
+  # echo -e "\t$basename container1 <<EOF\n\tls -l\n\tuptime\n\tEOF"
 }
 
 function parse_options {
+  COMMAND_LINE=()
   while [[ $# -gt 0 ]]; do
     case "$1" in
-    --help | -h)
-      usage && exit 0
-      ;;
+    --help | -h) usage && exit 0 ;;
     --)
-      shift 1
+      shift
       COMMAND_LINE+=("$@")
       break
       ;;
-    -*)
-      # options if any
-      echo >&2 "Unknown option: $1" && usage && exit 2
-      ;;
+    -*) echo >&2 "Unknown option: $1" && usage && exit 2 ;;
     *)
-      [[ -z $CONTAINER ]] && CONTAINER=$1 || COMMAND_LINE+=("$1")
+      if [[ ! -v CONTAINER ]]; then
+        CONTAINER=$1
+      else
+        COMMAND_LINE+=("$1")
+      fi
       ;;
     esac
-    shift 1
+    shift
   done
+  [[ ! -v CONTAINER ]] && usage && exit 1
+  if [[ -t 0 ]]; then
+    ((${#COMMAND_LINE[@]} == 0)) && usage && exit 2
+  else
+    HEREDOC=true
+  fi
 
-  # echo "CONTAINER=$CONTAINER"
-  # echo "COMMAND_LINE=(${COMMAND_LINE[@]})"
-
-  ([[ -z $CONTAINER ]] || [[ ${#COMMAND_LINE[@]} == 0 ]]) && usage && exit 1 || true
 }
 
 function exec {
-  incus exec "$CONTAINER" -- "${COMMAND_LINE[@]}"
+  if [[ -v HEREDOC ]]; then
+    # TODO: test whether miaou-bash mounted within container
+    script="miaou-bash <<EOF
+    $(cat)
+EOF"
+    if ! incus exec -t "$CONTAINER" -- bash -lc "$script"; then
+      # TO BYPASS the miaou-exec error itself!
+      builtin exit $?
+    fi
+  else
+    incus exec "$CONTAINER" -- "${COMMAND_LINE[@]}"
+  fi
 }
 
 # MAIN