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#!/bin/sh
# Provide the canonicalize filename (physical filename with out any symlinks)
# like the GNU version readlink with the -f option regardless of the version of
# readlink (GNU or BSD).
# This file is part of a set of unofficial pre-commit hooks available
# at github.
# Link: https://github.com/ddddavidmartin/Pre-commit-hooks
# Contact: David Martin, ddddavidmartin@fastmail.com
###########################################################
# There should be no need to change anything below this line.
# Canonicalize by recursively following every symlink in every component of the
# specified filename. This should reproduce the results of the GNU version of
# readlink with the -f option.
#
# Reference: http://stackoverflow.com/questions/1055671/how-can-i-get-the-behavior-of-gnus-readlink-f-on-a-mac
canonicalize_filename () {
local target_file="$1"
local physical_directory=""
local result=""
# Need to restore the working directory after work.
local working_dir="`pwd`"
cd -- "$(dirname -- "$target_file")"
target_file="$(basename -- "$target_file")"
# Iterate down a (possible) chain of symlinks
while [ -L "$target_file" ]
do
target_file="$(readlink -- "$target_file")"
cd -- "$(dirname -- "$target_file")"
target_file="$(basename -- "$target_file")"
done
# Compute the canonicalized name by finding the physical path
# for the directory we're in and appending the target file.
physical_directory="`pwd -P`"
result="$physical_directory/$target_file"
# restore the working directory after work.
cd -- "$working_dir"
echo "$result"
}
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