Add nvim as a diff tool for getplugs plugin (#527)

* Add nvim as a diff tool for getplugs plugin

* Comment out `is_cmd_exists()`

* Add nvim diff tool for diffs plugin

* Add $EDITOR to nuke plugin for editing/reading text file format

* Modify diff command to fix CircleCI failures

* Fix getplugs prompt

* Allow nuke to use custom $PAGER

1 files changed, 9 insertions, 3 deletions

diff --git a/plugins/diffs b/plugins/diffs
index 71f6817..ff85aa8 100755
--- a/plugins/diffs
+++ b/plugins/diffs
@@ -12,12 +12,18 @@
 
 selection=${XDG_CONFIG_HOME:-$HOME/.config}/nnn/.selection
 
+if which nvim >/dev/null 2>&1; then
+    diffcmd="nvim -d"
+else
+    diffcmd="vimdiff +0"
+fi
+
 dirdiff() {
     dir1=$(mktemp "${TMPDIR:-/tmp}"/nnn-"$(basename "$1")".XXXXXXXX)
     dir2=$(mktemp "${TMPDIR:-/tmp}"/nnn-"$(basename "$2")".XXXXXXXX)
     ls -A1 "$1" > "$dir1"
     ls -A1 "$2" > "$dir2"
-    vimdiff "$dir1" "$dir2"
+    $diffcmd "$dir1" "$dir2"
     rm "$dir1" "$dir2"
 }
 
@@ -33,14 +39,14 @@ if [ -s "$selection" ]; then
             #     Vim: Warning: Input is not from a terminal
             # xargs -0 -o vimdiff < $selection
 
-            xargs -0 vimdiff +0 < "$selection"
+            eval xargs -0 "$diffcmd" < "$selection"
         fi
     elif ! [ -z "$1" ]; then
         f1="$(echo "$arr" | sed -n '1p')"
         if [ -d "$f1" ] && [ -d "$1" ]; then
             dirdiff "$f1" "$1"
         elif [ -f "$f1" ] && [ -f "$1" ]; then
-            vimdiff +0 "$f1" "$1"
+            $diffcmd "$f1" "$1"
         else
             echo "cannot compare file with directory"
         fi