Add bash_completion to swiftclient

This patch basically follows the bash completion
model that other OpenStack clients use. It creates
a new command to swiftclient called `bash_completion`.

The `bash_completion` command by default will print
all base flags and exsiting commands. If you pass
it a command, it'll print out all base flags and
any flags that command accepts. So as you type out
your swift command and auto-complete, only the current
available flags are offered to you.

This is used by the swift.bash_completion script to
allow swift commands to be bash completed.

To make it work, place the swift.bash_completion file
into /etc/bash_completion.d and source it:

  cp tools/swift.bash_completion /etc/bash_completion.d/swift
  source /etc/bash_completion.d/swift

Because swiftclient itself is creating this flag/command output
it should automatically add anything we add to the swiftclient
CLI.

Change-Id: I5609a19018269762b4640403daae5827bb9ad724

1 files changed, 32 insertions, 0 deletions

diff --git a/tools/swift.bash_completion b/tools/swift.bash_completion
new file mode 100644
index 0000000..2f98a6b
--- /dev/null
+++ b/tools/swift.bash_completion
@@ -0,0 +1,32 @@
+declare -a _swift_opts # lazy init
+
+_swift_get_current_opt()
+{
+    local opt
+    for opt in ${_swift_opts[@]} ; do
+        if [[ $(echo ${COMP_WORDS[*]} |grep -c " $opt\$") > 0 ]] || [[ $(echo ${COMP_WORDS[*]} |grep -c " $opt ") > 0 ]] ; then
+            echo $opt
+            return 0
+        fi
+    done
+    echo ""
+    return 0
+}
+
+_swift()
+{
+    local opt cur prev sflags
+    COMPREPLY=()
+    cur="${COMP_WORDS[COMP_CWORD]}"
+    prev="${COMP_WORDS[COMP_CWORD-1]}"
+
+    if [ "x$_swift_opts" == "x" ] ; then
+                _swift_opts=(`swift bash_completion "$sbc" | sed -e "s/-[-A-Za-z0-9_]*//g" -e "s/  */ /g"`)
+    fi
+
+    opt="$(_swift_get_current_opt)"
+    COMPREPLY=($(compgen -W "$(swift bash_completion $opt)" -- ${cur}))
+
+    return 0
+}
+complete -F _swift swift