add bash completion for hab command

plans/bash-completion/plan.sh

@@ -0,0 +1,11 @@
+pkg_name=bash-completion
+pkg_origin=core
+pkg_version=2.3
+pkg_license=('GPLv2')
+pkg_maintainer="The Habitat Maintainers <[email protected]>"
+pkg_source=https://github.com/scop/bash-completion/releases/download/${pkg_version}/bash-completion-${pkg_version}.tar.xz
+pkg_shasum=b2e081af317f3da4fff3a332bfdbebeb5514ebc6c2d2a9cf781180acab15e8e9
+pkg_bin_dirs=(bin)
+pkg_build_deps=(core/make core/gcc core/autoconf core/automake)
+pkg_deps=(core/glibc)
+

support/bash_completion.sh

@@ -0,0 +1,121 @@
+# Copyright:: Copyright (c) 2015-2016 The Habitat Maintainers
+#
+# The terms of the Evaluation Agreement (Habitat) between Chef Software Inc.
+# and the party accessing this file ("Licensee") apply to Licensee's use of
+# the Software until such time that the Software is made available under an
+# open source license such as the Apache 2.0 License.
+
+# This is a bash completion file for the Habitat `hab` command. It requires
+# a "newer" version of bash-completion, so if you see an error such as
+# "_get_comp_words_by_ref: command not found", try sourcing the Habitat
+# bash-completion package via:
+#   source "`hab pkg path core/bash-completion`/etc/profile.d/bash_completion.sh"
+
+# bash_completion for hab
+_hab()
+{
+    local cur prev
+    _get_comp_words_by_ref cur prev
+
+    COMPREPLY=()
+    cur=${COMP_WORDS[COMP_CWORD]}
+    prev=${COMP_WORDS[COMP_CWORD-1]}
+    len=${#COMP_WORDS[@]}
+    if [ $len -gt 2 ]
+    then
+        minus2=${COMP_WORDS[COMP_CWORD-2]}
+    fi
+
+    if [ $COMP_CWORD -eq 1 ]; then
+        case $prev in
+            hab)
+                COMPREPLY=( $( compgen -W "apply artifact config file help install origin pkg ring service setup start studio sup user" -- "$cur" ) )
+                ;;
+                   esac
+    elif [ $COMP_CWORD -eq 2 ]; then
+        case "$prev" in
+            artifact)
+                cmds=( "hash help sign upload verify" )
+                COMPREPLY=( $( compgen -W "$cmds" -- "$cur") )
+                ;;
+            cli)
+                cmds=( "help setup" )
+                COMPREPLY=( $( compgen -W "$cmds" -- "$cur") )
+                ;;
+            config)
+                cmds=( "apply help" )
+                COMPREPLY=( $( compgen -W "$cmds" -- "$cur") )
+                ;;
+            file)
+                cmds=( "help upload" )
+                COMPREPLY=( $( compgen -W "$cmds" -- "$cur") )
+                ;;
+            origin)
+                cmds=( "help key" )
+                COMPREPLY=( $( compgen -W "$cmds" -- "$cur") )
+                ;;
+            pkg)
+                cmds=( "binlink build exec export help install path" )
+                COMPREPLY=( $( compgen -W "$cmds" -- "$cur") )
+                ;;
+            ring)
+                cmds=( "help key" )
+                COMPREPLY=( $( compgen -W "$cmds" -- "$cur") )
+                ;;
+            service)
+                cmds=( "help key" )
+                COMPREPLY=( $( compgen -W "$cmds" -- "$cur") )
+                ;;
+            studio)
+                cmds=( "build enter help new rm run version" )
+                COMPREPLY=( $( compgen -W "$cmds" -- "$cur") )
+                ;;
+            sup)
+                cmds=( "bash config help sh start" )
+                COMPREPLY=( $( compgen -W "$cmds" -- "$cur") )
+                ;;
+            user)
+                cmds=( "help key" )
+                COMPREPLY=( $( compgen -W "$cmds" -- "$cur") )
+                ;;
+
+
+        esac
+    elif [ $COMP_CWORD -eq 3 ]; then
+        case "$minus2" in
+            origin)
+                case "$prev" in
+                    key) #hab origin key
+                        cmds=( "download export generate help import upload" )
+                        COMPREPLY=( $( compgen -W "$cmds" -- "$cur") )
+                    ;;
+                esac
+            ;;
+            ring) # hab ring key
+                case "$prev" in
+                    key)
+                        cmds=( "export generate help import" )
+                        COMPREPLY=( $( compgen -W "$cmds" -- "$cur") )
+                    ;;
+                esac
+            ;;
+            service) # hab service key
+                case "$prev" in
+                    key)
+                        cmds=( "generate help" )
+                        COMPREPLY=( $( compgen -W "$cmds" -- "$cur") )
+                    ;;
+                esac
+            ;;
+            user) # hab user key
+                case "$prev" in
+                    key)
+                        cmds=( "generate help" )
+                        COMPREPLY=( $( compgen -W "$cmds" -- "$cur") )
+                    ;;
+                esac
+            ;;
+        esac
+    fi
+}
+complete -F _hab hab