i3/i3-sensible-pager

#!/bin/sh
#
# This code is released in public domain by Han Boetes <han@mijncomputer.nl>

# This script tries to exec a pager by trying some known pagers if $PAGER is
# not set.
#
# Distributions/packagers can enhance this script with a
# distribution-specific mechanism to find the preferred pager.

# The less -E and -F options exit immediately for short files, strip if present.
case "$LESS" in
  *[EF]*) LESS=`echo "$LESS" | tr -d EF`
esac

# Hopefully one of these is installed (no flamewars about preference please!):
# We don't use 'more' because it will exit if the file is too short.
# Worst case scenario we'll open the file in your editor.
for pager in "$PAGER" less most w3m pg i3-sensible-editor; do
    if command -v "$pager" > /dev/null 2>&1; then
        exec "$pager" "$@"
    fi
done