Add MVP for zsh widget (#50)

Related: #37

scripts/lint

@@ -8,5 +8,6 @@ export SCRIPT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
 cd "${SCRIPT_DIR}"
 find . -iname '*.sh' | xargs -I% dot code beautify %
 find scripts/* | xargs -I% dot code beautify %
+find shell/* | xargs -I% dot code beautify %
 dot code beautify "${SCRIPT_DIR}/test/run"
 dot code beautify "${SCRIPT_DIR}/navi"

shell/widget.zsh

@@ -0,0 +1,9 @@
+_call_navi() {
+   # zle kill-whole-line
+   zle -U "$(NAVI_FZF_ALL_INPUTS=true navi --print "$(echo "$CUTBUFFER" | xargs)" <> /dev/tty)"
+   zle accept-line
+}
+
+zle -N _call_navi
+
+bindkey '\eg' _call_navi

src/arg.sh

@@ -60,10 +60,15 @@ arg::pick() {
    done
 
    if [ -n "$fn" ]; then
-      eval "$fn" | ui::pick --prompt "$arg: " --header-lines "${headers:-0}" | str::column "${column:-}"
+      local suggestions="$(eval "$fn" 2>/dev/null)"
+      if [ -n "$suggestions" ]; then
+         echo "$suggestions" | ui::pick --prompt "$arg: " --header-lines "${headers:-0}" | str::column "${column:-}"
+      fi
+   elif ${NAVI_FZF_ALL_INPUTS:-false}; then
+      echo "" | ui::pick --prompt "$arg: " --print-query --height 1
    else
       printf "\033[0;36m${arg}:\033[0;0m " > /dev/tty
-      read value
+      read -r value
       ui::clear_previous_line > /dev/tty
       printf "$value"
    fi

src/main.sh

@@ -30,7 +30,7 @@ handler::main() {
 
       value="$(arg::pick "$arg" "$cheat" || echo "")"
       if [ -z "$value" ]; then
-         echo "$cmd"
+         echoerr "Unable to fetch suggestions for '$arg'!"
          exit 0
       fi