Better gnu util handling

Signed-off-by: Marcus Noble <github@marcusnoble.co.uk>

home/.bin/date

@@ -0,0 +1 @@
+/opt/homebrew/bin//gdate

home/.bin/readlink

@@ -0,0 +1 @@
+/opt/homebrew/bin//greadlink

home/.bin/sed

@@ -0,0 +1 @@
+/opt/homebrew/bin//gsed

home/.dotfiles/aliases

@@ -10,8 +10,9 @@ alias _find=`which find`
 alias _top=`which top`
 alias _ps="/bin/ps"
 alias _dig=`which dig`
-alias _readlink=`which readlink`
-alias _sed=`which sed`
+alias _readlink=`/usr/bin/readlink`
+alias _sed=`/usr/bin/sed`
+alias _date=`/bin/date`
 alias _git=`which git`
 if command -v $(brew --prefix)/bin/git &>/dev/null; then
   alias _git=$(brew --prefix)/bin/git
@@ -36,8 +37,11 @@ alias kctx='switch'
 alias machine-info='macchina -t Boron --bar'
 alias watch='watch '
 alias tmp='cd $(mktemp -d)'
-alias sed='gsed'
-which greadlink &>/dev/null && alias readlink=`which greadlink`
+
+# Ensure GNU version of tools are used by default (symlink so they are picked up in scripts also)
+which greadlink &>/dev/null && ln -sfn `which greadlink` ~/.bin/readlink
+which gsed &>/dev/null && ln -sfn `which gsed` ~/.bin/sed
+which gdate &>/dev/null && ln -sfn `which gdate` ~/.bin/date
 
 lt() {
   DEPTH=$(echo $1 | grep "^[0-9]*$")