Handle dynamically loaded completion functions (#79)

On Ubuntu/Debian, completion functions can be dynamically loaded via
_completion_loader. Since those functions are not visible when
fzf-completion.bash is loaded, we need this special hack to make it
possible to fail back to the original completion function when trigger
sequence is not found.

fzf-completion.bash

@@ -8,6 +8,11 @@
 # - $FZF_COMPLETION_TRIGGER (default: '**')
 # - $FZF_COMPLETION_OPTS    (default: empty)
 
+_fzf_orig_completion_filter() {
+  sed 's/.*-F *\([^ ]*\).* \([^ ]*\)$/export _fzf_orig_completion_\2=\1;/' |
+  sed 's/[^a-z0-9_= ;]/_/g'
+}
+
 _fzf_opts_completion() {
   local cur prev opts
   COMPREPLY=()
@@ -89,7 +94,7 @@ _fzf_path_completion() {
 }
 
 _fzf_list_completion() {
-  local cur selected trigger cmd src
+  local cur selected trigger cmd src ret
   read -r src
   cmd=$(echo ${COMP_WORDS[0]} | sed 's/[^a-z0-9_=]/_/g')
   trigger=${FZF_COMPLETION_TRIGGER:-**}
@@ -109,7 +114,15 @@ _fzf_list_completion() {
   else
     shift
     orig=$(eval "echo \$_fzf_orig_completion_$cmd")
-    [ -n "$orig" ] && type "$orig" > /dev/null && $orig "$@"
+    if [ -n "$orig" ] && type "$orig" > /dev/null; then
+      $orig "$@"
+    elif [ -n "$_fzf_completion_loader" ]; then
+      _completion_loader "$@"
+      ret=$?
+      eval $(complete | grep "\-F.* $cmd$" | _fzf_orig_completion_filter)
+      source $BASH_SOURCE
+      return $ret
+    fi
   fi
 }
 
@@ -153,7 +166,7 @@ EOF
 
 _fzf_ssh_completion() {
   _fzf_list_completion '+m' "$@" << "EOF"
-    cat <(cat ~/.ssh/config /etc/ssh/ssh_config 2> /dev/null | grep -i ^host) <(grep -v '^\s*\(#\|$\)' /etc/hosts) | awk '{print $2}' | sort -u
+    cat <(cat ~/.ssh/config /etc/ssh/ssh_config 2> /dev/null | grep -i ^host | grep -v '*') <(grep -v '^\s*\(#\|$\)' /etc/hosts) | awk '{print $2}' | sort -u
 EOF
 }
 
@@ -186,13 +199,15 @@ a_cmds="
 x_cmds="kill ssh telnet unset unalias export"
 
 # Preserve existing completion
-if [ "$_fzf_completion_loaded" != '0.8.6' ]; then
+if [ "$_fzf_completion_loaded" != '0.8.6-1' ]; then
   # Really wish I could use associative array but OSX comes with bash 3.2 :(
   eval $(complete | grep '\-F' | grep -v _fzf_ |
-    grep -E -w "$(echo $d_cmds $f_cmds $a_cmds $x_cmds | sed 's/ /|/g' | sed 's/+/\\+/g')" |
-    sed 's/.*-F *\([^ ]*\).* \([^ ]*\)$/export _fzf_orig_completion_\2=\1;/' |
-    sed 's/[^a-z0-9_= ;]/_/g')
-  export _fzf_completion_loaded=0.8.6.1
+    grep -E " ($(echo $d_cmds $f_cmds $a_cmds $x_cmds | sed 's/ /|/g' | sed 's/+/\\+/g'))$" | _fzf_orig_completion_filter)
+  export _fzf_completion_loaded=0.8.6-1
+fi
+
+if type _completion_loader > /dev/null; then
+  _fzf_completion_loader=1
 fi
 
 # Directory