First stab

completion.bash

@@ -0,0 +1,37 @@
+#!/env bash
+
+#/usr/bin/env bash
+_abra_completions()
+{
+    local CUR PREV COMMANDS_LIST COMMANDS
+
+    CUR=${COMP_WORDS[COMP_CWORD]}
+    PREV=${COMP_WORDS[COMP_CWORD-1]}
+
+    mapfile -t COMMANDS_LIST < <(abra command_ls)
+    echo "${COMMANDS_LIST[@]}"
+
+    case ${COMP_CWORD} in
+        1)
+            COMPREPLY=($(compgen -W "${COMMANDS_LIST[*]%% *}" -- ${CUR}))
+            ;;
+        2)
+            SUB_COMMANDS=()
+            for COMMAND in "${COMMANDS_LIST[@]}"; do
+              echo $PREV
+              if [[ COMMAND =~ $PREV ]]; then
+                  echo "FOUND $PREV $COMMAND"
+                  SUB_COMMANDS+=("$COMMAND")
+              fi
+            done
+
+            COMPREPLY=($(compgen -W "${COMMANDS[*]#* }" -- ${CUR}))
+            ;;
+        *)
+            echo $COMP_CWORD
+            COMPREPLY=()
+            ;;
+    esac
+}
+
+complete -F _abra_completions abra