Add gcloud Bash completion.

.bash_completion.d/gcloud

+_python_argcomplete() {
+    local IFS=''
+    local prefix=
+    typeset -i n
+    (( lastw=${#COMP_WORDS[@]} -1))
+    if [[ ${COMP_WORDS[lastw]} == --*=* ]]; then
+        # for bash version 3.2
+        flag=${COMP_WORDS[lastw]%%=*}
+        set -- "$1" "$2" '='
+    elif [[ $3 == '=' ]]; then
+      flag=${COMP_WORDS[-3]}
+    fi
+    if [[ $3 == ssh  && $2 == *@* ]] ;then
+        # handle ssh user@instance specially
+        prefix=${2%@*}@
+        COMP_LINE=${COMP_LINE%$2}"${2#*@}"
+    elif [[ $3 == '=' ]] ; then
+        # handle --flag=value
+        prefix=$flag=$2
+        line=${COMP_LINE%$prefix};
+        COMP_LINE=$line${prefix/=/ };
+        prefix=
+    fi
+    if [[ $2 == *,* ]]; then
+          # handle , separated list
+          prefix=${2%,*},
+          set -- "$1" "${2#$prefix}" "$3"
+          COMP_LINE==${COMP_LINE%$prefix*}$2
+    fi
+    # Treat --flag=<TAB> as --flag <TAB> to work around bash 4.x bug
+    if [[ ${COMP_LINE} == *=  && ${COMP_WORDS[-2]} == --* ]]; then
+        COMP_LINE=${COMP_LINE%=}' '
+    fi
+    COMPREPLY=( $(IFS="$IFS"                   COMP_LINE="$COMP_LINE"                   COMP_POINT="$COMP_POINT"                   _ARGCOMPLETE_COMP_WORDBREAKS="$COMP_WORDBREAKS"                   _ARGCOMPLETE=1                   "$1" 8>&1 9>&2 1>/dev/null 2>/dev/null) )
+    if [[ $? != 0 ]]; then
+        unset COMPREPLY
+        return
+    fi
+    if [[ $prefix != '' ]]; then
+        for ((n=0; n < ${#COMPREPLY[@]}; n++)); do
+            COMPREPLY[$n]=$prefix${COMPREPLY[$n]}
+        done
+    fi
+    for ((n=0; n < ${#COMPREPLY[@]}; n++)); do
+        match=${COMPREPLY[$n]%' '}
+        if [[ $match != '' ]]; then
+            COMPREPLY[$n]=${match//? /' '}' '
+        fi
+    done
+    # if flags argument has a single completion and ends in  '= ', delete ' '
+    if [[ ${#COMPREPLY[@]} == 1 && ${COMPREPLY[0]} == -* &&
+          ${COMPREPLY[0]} == *'= ' ]]; then
+        COMPREPLY[0]=${COMPREPLY[0]%' '}
+    fi
+}
+complete -o nospace -F _python_argcomplete "gcloud"
+
+_completer() {
+    command=$1
+    name=$2
+    eval '[[ "$'"${name}"'_COMMANDS" ]] || '"${name}"'_COMMANDS="$('"${command}"')"'
+    set -- $COMP_LINE
+    shift
+    while [[ $1 == -* ]]; do
+          shift
+    done
+    [[ $2 ]] && return
+    grep -q "${name}\s*$" <<< $COMP_LINE &&
+        eval 'COMPREPLY=($'"${name}"'_COMMANDS)' &&
+        return
+    [[ "$COMP_LINE" == *" " ]] && return
+    [[ $1 ]] &&
+        eval 'COMPREPLY=($(echo "$'"${name}"'_COMMANDS" | grep ^'"$1"'))'
+}
+
+unset bq_COMMANDS
+_bq_completer() {
+    _completer "CLOUDSDK_COMPONENT_MANAGER_DISABLE_UPDATE_CHECK=1 bq help | grep '^[^ ][^ ]*  ' | sed 's/ .*//'" bq
+}
+
+complete -F _bq_completer bq
+complete -o nospace -F _python_argcomplete gsutil