[bash] remove duplicates from completions

completions/bash/multipass

@@ -21,23 +21,9 @@ _multipass_complete()
         local cmd="multipass list --format=csv --no-ipv4"
         [ -n "$state" ] && cmd="$cmd | \awk -F',' '\$2 == \"$state\"'"
 
-        local instances=$( \eval $cmd | \tail -n +2 | \cut -d',' -f 1 )
+        local instances=$( \eval $cmd | \tail -n +2 | \cut -d',' -f 1  | \tr '\r\n' ' ')
 
-        local found
-
-        _get_comp_words_by_ref -n := -w WORDS -i CWORD cur prev
-        for instance in $instances; do
-            found=0
-            for ((i=2; i<CWORD; i++)); do
-                if [[ "${WORDS[i]}" == ${instance} ]]; then
-                    found=1
-                    break
-                fi
-            done
-            if [ ${found} == 0 ]; then
-                opts="${opts} ${instance}"
-            fi
-        done
+        _add_nonrepeating_args "$instances"
     }
 
     # Set $opts to the list of available networks.
@@ -70,22 +56,14 @@ _multipass_complete()
     {
         opts=""
 
-        local no_map_found=0
-        local help_found=0
+        _add_nonrepeating_args "--no-map-working-directory --help --verbose"
+
         local definition_found=0
-        local verbose_found=0
 
         for ((i=2; i<COMP_CWORD; ++i)); do
-            if [[ "${COMP_WORDS[$i]}" == '--no-map-working-directory' ]]; then no_map_found=1; fi
-            if [[ "${COMP_WORDS[$i]}" == '--help' ]]; then help_found=1; fi
-            if [[ "${COMP_WORDS[$i]}" == '--verbose' ]]; then verbose_found=1; fi
             if [[ "${COMP_WORDS[$i]}" =~ ':' ]]; then definition_found=1; fi
         done
 
-        if [[ ${no_map_found} == 0 ]]; then opts="${opts} --no-map-working-directory"; fi
-        if [[ ${help_found} == 0 ]]; then opts="${opts} --help"; fi
-        if [[ ${verbose_found} == 0 ]]; then opts="${opts} --verbose"; fi
-
         if [[ ${definition_found} == 0 ]] && [[ "${cur}" != ':' ]]; then
             _multipass_instances_with_colon
         fi
@@ -99,30 +77,6 @@ _multipass_complete()
         multipass_aliases=$( \eval $cmd | \tail -n +2 | \cut -d',' -f 1 )
     }
 
-    # Set $unused_aliases to the list of aliases from which were not yet specified in the command-line.
-    _unused_aliases()
-    {
-        _multipass_aliases
-
-        local alias_found=0
-
-        unused_aliases=""
-
-        for j in $multipass_aliases; do
-            alias_found=0
-
-            for ((i=2; i<COMP_CWORD; ++i)); do
-                if [[ "${COMP_WORDS[$i]}" == "$j" ]]; then
-                    alias_found=1
-                fi
-            done
-
-            if [[ ${alias_found} == 0 ]]; then
-                unused_aliases="${unused_aliases} $j"
-            fi
-        done
-    }
-
     # Removes the comma or equals sign at the end of $cur.
     _remove_trailing_char()
     {
@@ -192,6 +146,26 @@ _multipass_complete()
         if [[ ${mode_found} == 0 ]]; then opts="${opts} mode="; fi
     }
 
+    # Adds the passed list to the opts array while filtering out duplicates
+    _add_nonrepeating_args()
+    {
+        local array=$1
+        local found
+
+        for item in $array; do
+            found=0
+            for ((i=2; i<CWORD; i++)); do
+                if [[ "${WORDS[i]}" == ${item} ]]; then
+                    found=1
+                    break
+                fi
+            done
+            if [ ${found} == 0 ]; then
+                opts="${opts} ${item}"
+            fi
+        done
+    }
+
     # Add comma and equals sign to the list of word separators if they are not already there, useful to separate
     # options of the form "opt1=val1,opt2=val2".
     if [[ ! "${COMP_WORDBREAKS}" =~ "," ]]; then
@@ -202,6 +176,7 @@ _multipass_complete()
     fi
 
     local cur cmd opts prev prev2 prev_opts multipass_aliases unused_aliases
+    _get_comp_words_by_ref -n := -w WORDS -i CWORD cur prev
     COMPREPLY=()
     cur="${COMP_WORDS[COMP_CWORD]}"
     prev="${COMP_WORDS[COMP_CWORD-1]}"
@@ -216,49 +191,45 @@ _multipass_complete()
 
     if [[ "${multipass_cmds}" =~ " ${cmd} " || "${multipass_cmds}" =~ ^${cmd} || "${multipass_cmds}" =~ \ ${cmd}$ ]];
     then
-        opts="--help --verbose"
+        _add_nonrepeating_args "--help"
+        opts="${opts} --verbose"
     fi
 
     case "${cmd}" in
         "exec")
             opts="${opts} --working-directory --no-map-working-directory"
         ;;
         "info")
-            opts="${opts} --all --format"
+            _add_nonrepeating_args "--all --format"
         ;;
-        "list"|"ls")
-            opts="${opts} --format"
-        ;;
-        "networks")
-            opts="${opts} --format"
+        "list"|"ls"|"networks"|"aliases")
+            _add_nonrepeating_args "--format"
         ;;
         "delete")
-            opts="${opts} --all --purge"
+            _add_nonrepeating_args "--all --purge"
         ;;
         "launch")
-            opts="${opts} --cpus --disk --memory --name --cloud-init --network --bridged --mount"
+            _add_nonrepeating_args "--cpus --disk --memory --name --cloud-init --bridged --mount"
+            opts="${opts} --network --mount"
         ;;
         "mount")
             opts="${opts} --gid-map --uid-map"
         ;;
         "recover"|"start"|"suspend"|"restart")
-            opts="${opts} --all"
+            _add_nonrepeating_args "--all"
         ;;
         "stop")
-            opts="${opts} --all --cancel --time"
+            _add_nonrepeating_args "--all --cancel --time"
         ;;
         "find")
-            opts="${opts} --show-unsupported --force-update --format"
-        ;;
-        "aliases")
-            opts="${opts} --format"
+            _add_nonrepeating_args "--show-unsupported --force-update --format"
         ;;
         "unalias")
-            _unused_aliases
-            opts="${opts} ${unused_aliases}"
+            _multipass_aliases
+            _add_nonrepeating_args $multipass_aliases
         ;;
         "transfer"|"copy-files")
-            opts="${opts} --parents --recursive"
+            _add_nonrepeating_args "--parents --recursive"
         ;;
     esac