Add zsh completion for the new 'docker secret' command

Signed-off-by: Steve Durrheimer <s.durrheimer@gmail.com>

contrib/completion/zsh/_docker

@@ -1515,6 +1515,107 @@ __docker_plugin_subcommand() {
 
 # EO plugin
 
+# BO secret
+
+__docker_secrets() {
+    [[ $PREFIX = -* ]] && return 1
+    integer ret=1
+    local line s
+    declare -a lines secrets
+
+    type=$1; shift
+
+    lines=(${(f)${:-"$(_call_program commands docker $docker_options secret ls)"$'\n'}})
+
+    # Parse header line to find columns
+    local i=1 j=1 k header=${lines[1]}
+    declare -A begin end
+    while (( j < ${#header} - 1 )); do
+        i=$(( j + ${${header[$j,-1]}[(i)[^ ]]} - 1 ))
+        j=$(( i + ${${header[$i,-1]}[(i)  ]} - 1 ))
+        k=$(( j + ${${header[$j,-1]}[(i)[^ ]]} - 2 ))
+        begin[${header[$i,$((j-1))]}]=$i
+        end[${header[$i,$((j-1))]}]=$k
+    done
+    end[${header[$i,$((j-1))]}]=-1
+    lines=(${lines[2,-1]})
+
+    # ID
+    if [[ $type = (ids|all) ]]; then
+        for line in $lines; do
+            s="${line[${begin[ID]},${end[ID]}]%% ##}"
+            secrets=($secrets $s)
+        done
+    fi
+
+    # Names
+    if [[ $type = (names|all) ]]; then
+        for line in $lines; do
+            s="${line[${begin[NAME]},${end[NAME]}]%% ##}"
+            secrets=($secrets $s)
+        done
+    fi
+
+    _describe -t secrets-list "secrets" secrets "$@" && ret=0
+    return ret
+}
+
+__docker_complete_secrets() {
+    [[ $PREFIX = -* ]] && return 1
+    __docker_secrets all "$@"
+}
+
+__docker_secret_commands() {
+    local -a _docker_secret_subcommands
+    _docker_secret_subcommands=(
+        "create:Create a secret using stdin as content"
+        "inspect:Display detailed information on one or more secrets"
+        "ls:List secrets"
+        "rm:Remove one or more secrets"
+    )
+    _describe -t docker-secret-commands "docker secret command" _docker_secret_subcommands
+}
+
+__docker_secret_subcommand() {
+    local -a _command_args opts_help
+    local expl help="--help"
+    integer ret=1
+
+    opts_help=("(: -)--help[Print usage]")
+
+    case "$words[1]" in
+        (create)
+            _arguments $(__docker_arguments) \
+                $opts_help \
+                "($help)*"{-l=,--label=}"[Secret labels]:label: " \
+                "($help -):secret: " && ret=0
+            ;;
+        (inspect)
+            _arguments $(__docker_arguments) \
+                $opts_help \
+                "($help -f --format)"{-f=,--format=}"[Format the output using the given Go template]:template: " \
+                "($help -)*:secret:__docker_complete_secrets" && ret=0
+            ;;
+        (ls|list)
+            _arguments $(__docker_arguments) \
+                $opts_help \
+                "($help -q --quiet)"{-q,--quiet}"[Only display IDs]" && ret=0
+            ;;
+        (rm|remove)
+            _arguments $(__docker_arguments) \
+                $opts_help \
+                "($help -)*:secret:__docker_complete_secrets" && ret=0
+            ;;
+        (help)
+            _arguments $(__docker_arguments) ":subcommand:__docker_secret_commands" && ret=0
+            ;;
+    esac
+
+    return ret
+}
+
+# EO secret
+
 # BO service
 
 __docker_service_complete_ls_filters() {
@@ -2302,6 +2403,23 @@ __docker_subcommand() {
                     ;;
             esac
             ;;
+        (secret)
+            local curcontext="$curcontext" state
+            _arguments $(__docker_arguments) \
+                $opts_help \
+                "($help -): :->command" \
+                "($help -)*:: :->option-or-argument" && ret=0
+
+            case $state in
+                (command)
+                    __docker_secret_commands && ret=0
+                    ;;
+                (option-or-argument)
+                    curcontext=${curcontext%:*:*}:docker-${words[-1]}:
+                    __docker_secret_subcommand && ret=0
+                    ;;
+            esac
+            ;;
         (service)
             local curcontext="$curcontext" state
             _arguments $(__docker_arguments) \