Fix handling of filenames with space in bash completion (#341)

By calling __gitcompappend with the same suffix as the completion for git
does (i.e. " ") we can remove the call to sort -u as it is no longer
needed (bash seems to remove duplicates) and then spaces are handled correctly.

Also make the completion available in testhost.

Author: erijo

Makefile

@@ -123,6 +123,7 @@ testhost: require-docker .testyadm
 		--hostname testhost \
 		--rm -it \
 		-v "$(CURDIR)/.testyadm:/bin/yadm:ro" \
+		-v "$(CURDIR)/completion/bash/yadm:/usr/share/bash-completion/completions/yadm:ro" \
 		$(IMAGE) \
 		bash -l
 

completion/bash/yadm

@@ -1,88 +1,85 @@
 # test if git completion is missing, but loader exists, attempt to load
-if ! declare -F _git > /dev/null && ! declare -F __git_wrap__git_main > /dev/null; then
-  if declare -F _completion_loader > /dev/null; then
+if ! declare -F _git >/dev/null && ! declare -F __git_wrap__git_main >/dev/null; then
+  if declare -F _completion_loader >/dev/null; then
     _completion_loader git
   fi
 fi
 
 # only operate if git completion is present
-if declare -F _git > /dev/null || declare -F __git_wrap__git_main > /dev/null; then
+if declare -F _git >/dev/null || declare -F __git_wrap__git_main >/dev/null; then
 
   _yadm() {
 
     local current=${COMP_WORDS[COMP_CWORD]}
     local penultimate
-    if [ "$((COMP_CWORD-1))" -ge "0" ]; then
-      penultimate=${COMP_WORDS[COMP_CWORD-1]}
+    if ((COMP_CWORD >= 1)); then
+      penultimate=${COMP_WORDS[COMP_CWORD - 1]}
     fi
     local antepenultimate
-    if [ "$((COMP_CWORD-2))" -ge "0" ]; then
-      antepenultimate=${COMP_WORDS[COMP_CWORD-2]}
+    if ((COMP_CWORD >= 2)); then
+      antepenultimate=${COMP_WORDS[COMP_CWORD - 2]}
     fi
 
     local -x GIT_DIR
-    # shellcheck disable=SC2034
     GIT_DIR="$(yadm introspect repo 2>/dev/null)"
 
     case "$penultimate" in
       bootstrap)
         COMPREPLY=()
         return 0
-      ;;
+        ;;
       config)
-        COMPREPLY=( $(compgen -W "$(yadm introspect configs 2>/dev/null)") )
+        COMPREPLY=($(compgen -W "$(yadm introspect configs 2>/dev/null)"))
         return 0
-		  ;;
+        ;;
       decrypt)
-        COMPREPLY=( $(compgen -W "-l" -- "$current") )
+        COMPREPLY=($(compgen -W "-l" -- "$current"))
         return 0
-		  ;;
+        ;;
       init)
-        COMPREPLY=( $(compgen -W "-f -w" -- "$current") )
+        COMPREPLY=($(compgen -W "-f -w" -- "$current"))
         return 0
-		  ;;
+        ;;
       introspect)
-        COMPREPLY=( $(compgen -W "commands configs repo switches" -- "$current") )
+        COMPREPLY=($(compgen -W "commands configs repo switches" -- "$current"))
         return 0
-		  ;;
+        ;;
       help)
         COMPREPLY=() # no specific help yet
         return 0
-      ;;
+        ;;
       list)
-        COMPREPLY=( $(compgen -W "-a" -- "$current") )
+        COMPREPLY=($(compgen -W "-a" -- "$current"))
         return 0
-		  ;;
+        ;;
     esac
 
     case "$antepenultimate" in
       clone)
-        COMPREPLY=( $(compgen -W "-f -w -b --bootstrap --no-bootstrap" -- "$current") )
+        COMPREPLY=($(compgen -W "-f -w -b --bootstrap --no-bootstrap" -- "$current"))
         return 0
-		  ;;
+        ;;
     esac
 
-    local yadm_switches=( $(yadm introspect switches 2>/dev/null) )
+    local yadm_switches=($(yadm introspect switches 2>/dev/null))
 
     # this condition is so files are completed properly for --yadm-xxx options
     if [[ " ${yadm_switches[*]} " != *" $penultimate "* ]]; then
       # TODO: somehow solve the problem with [--yadm-xxx option] being
       #       incompatible with what git expects, namely [--arg=option]
-      if declare -F _git > /dev/null; then
+      if declare -F _git >/dev/null; then
         _git
       else
         __git_wrap__git_main
       fi
     fi
     if [[ "$current" =~ ^- ]]; then
-      local matching
-      matching=$(compgen -W "${yadm_switches[*]}" -- "$current")
-      __gitcompappend "$matching"
+      __gitcompappend "${yadm_switches[*]}" "" "$current" " "
     fi
 
     # Find the index of where the sub-command argument should go.
     local command_idx
-    for (( command_idx=1 ; command_idx < ${#COMP_WORDS[@]} ; command_idx++ )); do
+    for ((command_idx = 1; command_idx < ${#COMP_WORDS[@]}; command_idx++)); do
       local command_idx_arg="${COMP_WORDS[$command_idx]}"
       if [[ " ${yadm_switches[*]} " = *" $command_idx_arg "* ]]; then
         let command_idx++
@@ -93,19 +90,11 @@ if declare -F _git > /dev/null || declare -F __git_wrap__git_main > /dev/null; t
       fi
     done
     if [[ "$COMP_CWORD" = "$command_idx" ]]; then
-      local matching
-      matching=$(compgen -W "$(yadm introspect commands 2>/dev/null)" -- "$current")
-      __gitcompappend "$matching"
+      __gitcompappend "$(yadm introspect commands 2>/dev/null)" "" "$current" " "
     fi
-
-    # remove duplicates found in COMPREPLY (a native bash way could be better)
-    if [ -n "${COMPREPLY[*]}" ]; then
-      COMPREPLY=($(echo "${COMPREPLY[@]}" | sort -u))
-    fi
-
   }
 
-	complete -o bashdefault -o default -F _yadm yadm 2>/dev/null \
-		|| complete -o default -F _yadm yadm
+  complete -o bashdefault -o default -o nospace -F _yadm yadm 2>/dev/null ||
+    complete -o default -o nospace -F _yadm yadm
 
 fi