Add a rc/ctags.kak for a :tag implementation using exuberant ctags

src/rc/ctags.kak

@@ -0,0 +1,26 @@
+# Kakoune Exuberant CTags support script
+#
+# This script requires the readtags command available in ctags source but
+# not installed by default
+
+def -shell-params \
+    -shell-completion 'readtags -p "$1" | cut -f 1 | sort | uniq' \
+    tag \
+    %{ %sh{
+        if [[ -z "$1" ]]; then tagname=${kak_selection}; else tagname=$1; fi
+        matches=$(readtags ${tagname})
+        if [[ -z "${matches}" ]]; then
+            echo "echo tag not found ${tagname}"
+        else
+            menuparam=$(readtags ${tagname} | perl -i -ne '
+                /([^\t]+)\t([^\t]+)\t\/\^(.*)\$\// and print "%{$2 [$3]} %{try %{ edit %{$2}; exec %{%s\\Q$3<ret>} } catch %{ echo %{unable to find tag} } } ";
+                /([^\t]+)\t([^\t]+)\t(\d+)/        and print "%{$2:$3} %{edit %{$2}; exec %{$3g}} ";
+            ')
+
+            if [[ -z "${menuparam}" ]]; then
+                echo "echo no such tag ${tagname}";
+            else
+                echo "menu -auto-single ${menuparam//$'\n'/ }";
+            fi
+        fi
+    }}