Shell script to archive full source of last changed files.

get_patch.sh

#!/bin/bash

base=$1
archive=$2
currentBranch=$(git rev-parse --abbrev-ref HEAD)
currentBranch=${currentBranch//heads\//}

if [[ -z $base ]]
then
    base=bl_${currentBranch}
fi

if [[ -z $archive ]]
then
    archive=${currentBranch}_$(date +%Y-%m-%d).tgz
    # turn slash in the branch name to understore
    # so that it can be part of archive file name
    archive=${archive//\//-}
fi

# use bash built-in random number variable
mod_lst_file=/tmp/gp_mod${RANDOM}.lst 
del_lst_file=/tmp/gp_del${RANDOM}.lst 
# remove stale temp files
if [[ -f $mod_lst_file ]]
then
    rm -f $mod_lst_file
fi
if [[ -f $del_lst_file ]]
then
    rm -f $del_lst_file
fi

# IFS must be new line so that the status column and
# the file are treated as one entry rather than two
IFS=$(printf '\n')
for entry in "$(git diff --name-status $base)"
do
    if [[ $entry =~ ^M|^A ]]
    then
       echo $entry |cut -f 2 >> $mod_lst_file
    elif [[ $entry =~ ^D ]]
    then
       echo $entry |cut -f 2 >> $del_lst_file
    fi
done
unset IFS

if [[ -f $mod_lst_file && -s $mod_lst_file ]]
then
    tar -cvzf $archive -T $mod_lst_file
else
    echo "No changes made" 
    exit 1
fi

# clean up temp files
if [[ -f $mod_lst_file ]]
then
    rm -f $mod_lst_file
fi
if [[ -f $del_lst_file ]]
then
    rm -f $del_lst_file
fi

# vim: set ai nu nobk expandtab sw=4 ts=4 syntax=sh:

Add random temp file using Bash's builtin $RANDOM variable as inspired from Bash Shell Generate Random Numbers