Add bash completions

This contains bash completion functionality for the resin CLI, including completion for sub-commands.

Change-type: patch

resin-completion.bash

@@ -0,0 +1,73 @@
+#!/bin/bash
+
+_resin_complete()
+{
+  local cur prev
+
+  # Valid top-level completions
+  commands="app apps build config deploy device devices env envs help key \
+            keys local login logout logs note os preload quickstart settings \
+            signup ssh sync util version whoami"
+  # Sub-completions
+  app_cmds="create restart rm"
+  config_cmds="generate inject read reconfigure write"
+  device_cmds="identify init move public-url reboot register rename rm \
+               shutdown"
+  device_public_url_cmds="disable enable status"
+  env_cmds="add rename rm"
+  key_cmds="add rm"
+  local_cmds="configure flash logs push scan ssh stop"
+  os_cmds="build-config configure download initialize versions"
+  util_cmds="available-drives"
+
+
+  COMPREPLY=()
+  cur=${COMP_WORDS[COMP_CWORD]}
+  prev=${COMP_WORDS[COMP_CWORD-1]}
+
+  if [ $COMP_CWORD -eq 1 ]
+  then
+    COMPREPLY=( $(compgen -W "${commands}" -- $cur) )
+  elif [ $COMP_CWORD -eq 2 ]
+  then
+    case "$prev" in
+      "app")
+        COMPREPLY=( $(compgen -W "$app_cmds" -- $cur) )
+        ;;
+      "config")
+        COMPREPLY=( $(compgen -W "$config_cmds" -- $cur) )
+        ;;
+      "device")
+        COMPREPLY=( $(compgen -W "$device_cmds" -- $cur) )
+        ;;
+      "env")
+        COMPREPLY=( $(compgen -W "$env_cmds" -- $cur) )
+        ;;
+      "key")
+        COMPREPLY=( $(compgen -W "$key_cmds" -- $cur) )
+        ;;
+      "local")
+        COMPREPLY=( $(compgen -W "$local_cmds" -- $cur) )
+        ;;
+      "os")
+        COMPREPLY=( $(compgen -W "$os_cmds" -- $cur) )
+        ;;
+      "util")
+        COMPREPLY=( $(compgen -W "$util_cmds" -- $cur) )
+        ;;
+      "*")
+        ;;
+    esac
+  elif [ $COMP_CWORD -eq 3 ]
+  then
+    case "$prev" in
+      "public-url")
+        COMPREPLY=( $(compgen -W "$device_public_url_cmds" -- $cur) )
+        ;;
+      "*")
+        ;;
+    esac
+  fi
+
+}
+complete -F _resin_complete resin