Use git-diff as diff in OpenWRT / LEDE

diff-git.sh

#!/bin/sh
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# Gustavo Arnosti Neves
#
# Provides a diff-git shortcut in /usr/bin/diff-git
#
# Required: GIT
# # opkg install git
#
# You may install diffutils for the simplified diff
# # opkg install diffutils
#
# YOU SHOULD NOT USE /usr/bin/diff AS TARGET!
# SINCE THAT IS WHERE diffutils WOULD INSTALL diff
#
# No man pages on OpenWRT / LEDE so here you go:
# https://git-scm.com/docs/git-diff
#
# Wanted this to diff config files after updates
# Using --no-color makes git diff work well for me
# Not sure if it is needed everywhere, but both
# bash and ash gave me garbage chars without --no-color
#
# You can just copy-paste the on-liner if you want
#
# 05 / 2017 - LEDE 17.01.1



# This one-liner just add a shell script named diff-git 
# to /usr/bin/diff-git and makes it executable.
# You may want to change the target path/file
# by editing the TGT_DIFF variable.
# Example if you want to use git-diff in sbin: 
# TGT_DIFF='/usr/sbin/git-diff' && \

TGT_DIFF='/usr/bin/diff-git' && \
echo '#!/bin/sh'$'\n''"$(which git)" diff --no-color "$@"'$'\n' > "$TGT_DIFF" && \
chmod 755 "$TGT_DIFF"



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# Example run:
# # diff-git /etc/config/luci_statistics /etc/config/luci_statistics-opkg
# index 8b3c6af..c081a8e 100644
# --- a/etc/config/luci_statistics
# +++ b/etc/config/luci_statistics-opkg
# @@ -1,3 +1,4 @@
# +# general settings
# 
#  config statistics 'collectd'
#         option BaseDir '/var/run/collectd'
# @@ -13,12 +14,14 @@ config statistics 'rrdtool'
#         option image_width '600'
#         option image_path '/tmp/rrdimg'
# 
# +# output plugins
# +
#  config statistics 'collectd_rrdtool'
#         option enable '1'
# ...
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