Implement completion NoMatching

completions.go

@@ -77,6 +77,9 @@ const (
 	// obtain the same behavior but only for flags.
 	ShellCompDirectiveFilterDirs
 
+	// ShellCompDirectiveNoMatching indicates that the provided completions will be
+	// passed to the user as-is, without additional matching (zsh and fish only).
+	ShellCompDirectiveNoMatching
 	// ===========================================================================
 
 	// All directives using iota should be above this one.
@@ -159,6 +162,9 @@ func (d ShellCompDirective) string() string {
 	if d&ShellCompDirectiveFilterDirs != 0 {
 		directives = append(directives, "ShellCompDirectiveFilterDirs")
 	}
+	if d&ShellCompDirectiveNoMatching != 0 {
+		directives = append(directives, "ShellCompDirectiveNoMatching")
+	}
 	if len(directives) == 0 {
 		directives = append(directives, "ShellCompDirectiveDefault")
 	}

fish_completions.go

@@ -53,7 +53,7 @@ function __%[1]s_perform_completion
     __%[1]s_debug "last arg: $lastArg"
 
     # Disable ActiveHelp which is not supported for fish shell
-    set -l requestComp "%[9]s=0 $args[1] %[3]s $args[2..-1] $lastArg"
+    set -l requestComp "%[10]s=0 $args[1] %[3]s $args[2..-1] $lastArg"
 
     __%[1]s_debug "Calling $requestComp"
     set -l results (eval $requestComp 2> /dev/null)
@@ -119,6 +119,7 @@ function __%[1]s_prepare_completions
     set -l shellCompDirectiveNoFileComp %[6]d
     set -l shellCompDirectiveFilterFileExt %[7]d
     set -l shellCompDirectiveFilterDirs %[8]d
+    set -l shellCompDirectiveNoMatching %[9]d
 
     if test -z "$directive"
         set directive 0
@@ -141,8 +142,9 @@ function __%[1]s_prepare_completions
 
     set -l nospace (math (math --scale 0 $directive / $shellCompDirectiveNoSpace) %% 2)
     set -l nofiles (math (math --scale 0 $directive / $shellCompDirectiveNoFileComp) %% 2)
+    set -l nomatching (math (math --scale 0 $directive / $shellCompDirectiveNoMatching) %% 2)
 
-    __%[1]s_debug "nospace: $nospace, nofiles: $nofiles"
+    __%[1]s_debug "nospace: $nospace, nofiles: $nofiles, nomatching: $nomatching"
 
     # If we want to prevent a space, or if file completion is NOT disabled,
     # we need to count the number of valid completions.
@@ -150,10 +152,14 @@ function __%[1]s_prepare_completions
     # may not already be filtered so as to allow fish to match on different
     # criteria than the prefix.
     if test $nospace -ne 0; or test $nofiles -eq 0
-        set -l prefix (commandline -t | string escape --style=regex)
+        if test $nomatching -ne 0
-        __%[1]s_debug "prefix: $prefix"
+            set -l completions $__%[1]s_comp_results
-
+        else
-        set -l completions (string match -r -- "^$prefix.*" $__%[1]s_comp_results)
+            set -l prefix (commandline -t | string escape --style=regex)
+            __%[1]s_debug "prefix: $prefix"
+    
+            set -l completions (string match -r -- "^$prefix.*" $__%[1]s_comp_results)
+        end
         set --global __%[1]s_comp_results $completions
         __%[1]s_debug "Filtered completions are: $__%[1]s_comp_results"
 
@@ -211,7 +217,8 @@ complete -c %[2]s -n '__%[1]s_prepare_completions' -f -a '$__%[1]s_comp_results'
 
 `, nameForVar, name, compCmd,
 		ShellCompDirectiveError, ShellCompDirectiveNoSpace, ShellCompDirectiveNoFileComp,
-		ShellCompDirectiveFilterFileExt, ShellCompDirectiveFilterDirs, activeHelpEnvVar(name)))
+		ShellCompDirectiveFilterFileExt, ShellCompDirectiveFilterDirs, ShellCompDirectiveNoMatching,
+		activeHelpEnvVar(name)))
 }
 
 // GenFishCompletion generates fish completion file and writes to the passed writer.

zsh_completions.go

@@ -108,8 +108,9 @@ _%[1]s()
     local shellCompDirectiveNoFileComp=%[5]d
     local shellCompDirectiveFilterFileExt=%[6]d
     local shellCompDirectiveFilterDirs=%[7]d
+    local shellCompDirectiveNoMatching=%[8]d
 
-    local lastParam lastChar flagPrefix requestComp out directive comp lastComp noSpace
+    local lastParam lastChar flagPrefix requestComp out directive comp lastComp noSpace noMatching
     local -a completions
 
     __%[1]s_debug "\n========= starting completion logic =========="
@@ -177,7 +178,7 @@ _%[1]s()
         return
     fi
 
-    local activeHelpMarker="%[8]s"
+    local activeHelpMarker="%[9]s"
     local endIndex=${#activeHelpMarker}
     local startIndex=$((${#activeHelpMarker}+1))
     local hasActiveHelp=0
@@ -261,8 +262,14 @@ _%[1]s()
         fi
         return $result
     else
+        if [ $((directive & shellCompDirectiveNoMatching)) -ne 0 ]; then
+            __heph_debug "Activating no matching."
+            compstate[insert]=automenu
+            noMatching="-U -o nosort"
+        fi
+
         __%[1]s_debug "Calling _describe"
-        if eval _describe "completions" completions $flagPrefix $noSpace; then
+        if eval _describe "completions" completions $noMatching $flagPrefix $noSpace; then
             __%[1]s_debug "_describe found some completions"
 
             # Return the success of having called _describe
@@ -296,6 +303,6 @@ if [ "$funcstack[1]" = "_%[1]s" ]; then
 fi
 `, name, compCmd,
 		ShellCompDirectiveError, ShellCompDirectiveNoSpace, ShellCompDirectiveNoFileComp,
-		ShellCompDirectiveFilterFileExt, ShellCompDirectiveFilterDirs,
+		ShellCompDirectiveFilterFileExt, ShellCompDirectiveFilterDirs, ShellCompDirectiveNoMatching,
 		activeHelpMarker))
 }