improvements to shw, deleted aliases

dir

@@ -1,2 +0,0 @@
-#!/bin/bash
-ls -lhAF --color=auto "$@"

rsyn

@@ -1,2 +0,0 @@
-#!/bin/bash
-rsync -vaSH "$@"

shw

@@ -1,10 +1,12 @@
 #!/bin/bash
 
-# if $1 is a text file, less it
-if file "$1" | grep -q text; then
-   less -FRX "$1"
-
-# otherwise, just dir it
+# if stdin is coming from a pipe, run less
+if [[ ! -t 0 ]]; then
+   less -FX
+# if there is only one arg and it is not a directory, less it
+elif [[ -z "$2" && ! -d "$1" ]]; then
+   less -FX "$1"
+# otherwise, run dir
 else
     ls -lhAF --color=auto "$@"
 fi