Add nnn

dot_config/nnn/plugins/dot_nnn-plugin-helper

@@ -0,0 +1,61 @@
+#!/usr/bin/env sh
+
+# Description: Helper script for plugins
+#
+# Shell: POSIX compliant
+# Author: Anna Arad
+
+selection=${NNN_SEL:-${XDG_CONFIG_HOME:-$HOME/.config}/nnn/.selection}
+export selection
+
+## Set CUR_CTX to 1 to open directory in current context
+CUR_CTX=0
+export CUR_CTX
+
+NNN_PREFER_SELECTION="${NNN_PREFER_SELECTION:-0}"
+export NNN_PREFER_SELECTION
+
+## Ask nnn to switch to directory $1 in context $2.
+## If $2 is not provided, the function asks explicitly.
+nnn_cd () {
+    dir="$1"
+
+    if [ -z "$NNN_PIPE" ]; then
+        echo "No pipe file found" 1>&2
+        return
+    fi
+
+    if [ -n "$2" ]; then
+        context=$2
+    elif [ $CUR_CTX -ne 1 ]; then
+        printf "Choose context 1-4 (blank for current): "
+        read -r context
+    fi
+
+    printf "%s" "${context:-0}c$dir" > "$NNN_PIPE"
+}
+
+cmd_exists () {
+    type "$1" > /dev/null 2>&1
+    echo $?
+}
+
+nnn_use_selection() {
+    if ! [ -s "$selection" ]; then
+        return 1
+    fi
+
+    if [ "$NNN_PREFER_SELECTION" -eq 1 ]; then
+        return 0
+    else
+        [ -n "$1" ] && printf "%s " "$1"
+        printf "(s)election/(c)urrent? [default=c] "
+        read -r resp__
+
+        if [ "$resp__" = "s" ]; then
+            return 0
+        else
+            return 1
+        fi
+    fi
+}