support for multiple commands (WIP)

pulseaudio-tcp

@@ -22,19 +22,24 @@
 
 usage() {
     cat >&2 <<EOF
-# Usage:
-\`$0 [OPTIONS] OPERATION\`
-# Options:
+# pulseaudio-tcp - Connect to remote PulseAudio/Pipewire Server
+## Usage:
+\`$0 [OPTION ...] OPERATION ...\`
+## Options:
   * \`--debug\`:         Enable additional debug output for start and stop operations.
   * \`--no-gui\`:        Do not display GUI dialogs, use terminal for input and output.
   * \`--cookie COOKIE\`: Pass Pulseaudio cookie as option value instead of copying
                        from remote_host. Expects value to be Base64-encoded.
-# Operations:
+## Operations:
   * \`setup\`:    Interactively gather settings.
   * \`start\`:    Start redirection to remote host.
   * \`stop\`:     Stop redirection to remote host.
   * \`restart\`:  Stop and then start redirection.
   * \`status\`:   Check if redirection is set up and enabled.
+## Environment Variables:
+  * \`PULSEAUDIO_TCP_SSH_ADDARGS\`:  
+    If set, specifies additional commandline arguments for calls to \`ssh\`.  
+    Example: \`PULSEAUDIO_TCP_SSH_ADDARGS=-v pulseaudio-tcp --no-gui start\`
 EOF
 }
 
@@ -76,7 +81,7 @@ debug() {
 }
 
 _ssh() {
-    if ssh -o PasswordAuthentication=no -S "$USER"-pulseaudio "$remote_user"@"$remote_ip" "$@" ; then
+    if ssh "${_ssh_arguments[@]}" -S "$USER"-pulseaudio "$remote_user"@"$remote_ip" "$@" ; then
         return 0
     else
         error "SSH remote_ip=$remote_ip failed."
@@ -470,7 +475,7 @@ do_stop() {
 ##
 # Arguments
 
-operation=
+operations=()
 cookie=
 no_more_options=false
 # shellcheck disable=SC2034
@@ -501,8 +506,7 @@ while [[ $# -gt 0 ]] ; do
             help_cmdline=true
         ;;
         start|stop|restart|setup|status)
-            [[ -z $operation ]] || { gui=false error "Multiple operations are not supported." ; exit 1 ; }
-            operation=$arg
+            operations+=("$arg")
         ;;
         *)
             gui=false error "Unsupported argument (try \"--help\")"
@@ -514,6 +518,16 @@ done
 ##
 # Configuration
 
+_ssh_arguments=(
+    -o
+    PasswordAuthentication=no
+)
+
+if [[ -n $PULSEAUDIO_TCP_SSH_ADDARGS ]] ; then
+    read -r -a _ssh_additional_arguments <<< "$PULSEAUDIO_TCP_SSH_ADDARGS"
+    _ssh_arguments+=("${_ssh_additional_arguments[@]}")
+fi
+
 config_dir="$HOME"/.config/pulseaudio-tcp
 config=$config_dir/config.inc.sh
 
@@ -546,45 +560,46 @@ fi
 ##
 # Main Program
 
-rv=0
+for operation in "${operations[@]}" ; do
+    rv=0
 
-if test "$operation" = setup ; then
-    info "Entering setup mode ..."
-else
-    if ! test -e "$config" ; then
-        error "Configfile $config does not exist (use \"$0 setup\" first)."
-        rv=1
-    elif ! test -r "$config" ; then
-        error "Configfile $config is not readable."
-        rv=1
-    elif ! test -f "$config" ; then
-        error "Configfile $config is not a regular file."
-        rv=1
-    else
-        . "$config"
+    if [[ "$operation" != setup ]] ; then
+        if ! test -e "$config" ; then
+            error "Configfile $config does not exist (use \"$0 setup\" first)."
+            rv=1
+        elif ! test -r "$config" ; then
+            error "Configfile $config is not readable."
+            rv=1
+        elif ! test -f "$config" ; then
+            error "Configfile $config is not a regular file."
+            rv=1
+        else
+            . "$config"
 
-        if [[ -z $remote_ip ]] ; then
-            error "\"remote_ip=<IP address>\" not set in configfile $config."
-            rv=1
-        elif [[ -z $remote_user ]] ; then
-            error "\"remote_user=<username>\" not set in configfile $config."
-            rv=1
+            if [[ -z $remote_ip ]] ; then
+                error "\"remote_ip=<IP address>\" not set in configfile $config."
+                rv=1
+            elif [[ -z $remote_user ]] ; then
+                error "\"remote_user=<username>\" not set in configfile $config."
+                rv=1
+            fi
         fi
+
+        required_cmds=( jq pactl ssh )
+
+        for exe in "${required_cmds[@]}" ; do
+            if [[ -z $(type -p "$exe") ]] ; then
+                error "Required executable \"$exe\" not found."
+                rv=1
+            fi
+        done
     fi
 
-    required_cmds=( jq pactl ssh )
+    if [[ $rv -ne 0 ]] ; then
+        error "Preliminary checks failed, skipping operation."
+        break
+    fi
 
-    for exe in "${required_cmds[@]}" ; do
-        if [[ -z $(type -p "$exe") ]] ; then
-            error "Required executable \"$exe\" not found."
-            rv=1
-        fi
-    done
-fi
-
-if [[ $rv -ne 0 ]] ; then
-    error "Preliminary checks failed, skipping operation."
-else
     case "$operation" in
         setup)
             do_setup
@@ -612,6 +627,8 @@ else
             rv=1
         ;;
     esac
-fi
+
+    [[ $rv -ne 0 ]] && break
+done
 
 exit "$rv"