~rodrigo-gadea-percona/percona-server/ps-docs

#!/usr/bin/env sh

a=$1

b=$2

patch_name=$3

prefix="[$patch_name]"

big_prefix="$prefix ===== "

echo "$big_prefix Regenerate patch $patch_name based thought $a and $b"

echo "$big_prefix Header is:"

cat $patch_name | head -n7;

echo "$big_prefix Ok, let's go:"

patch_name_new=$patch_name.new;

patch_name_split=$patch_name.split;

echo "$prefix Remove $patch_name_new if exists..."

rm -f $patch_name_new;

echo "$prefix Remove $patch_name_split if exists..."

rm -rf $patch_name_split;

echo "$prefix Create $patch_name_split"

mkdir $patch_name_split;

cd $patch_name_split;

echo "$prefix Add header"

cat ../$patch_name | head -n7 > ../$patch_name_new

echo "$prefix Split to separated files"

for filename in `splitdiff -a -d ../$patch_name | awk '{ print $2 }' | sed -e "s/>//g"`; do

    echo "$prefix extract diff metainformation from $filename"

    a_head=`cat $filename | head -n2 | head -n1`;

    b_head=`cat $filename | head -n2 | tail -n1`;

    a_path=`echo $a_head | awk '{ print $2 }'`;

    b_path=`echo $b_head | awk '{ print $2 }'`;

    diff_string="diff -ruN $a_path $b_path";

    echo "$big_prefix $filename metainformation is:";

    echo "$prefix $diff_string";

    echo "$prefix $a_head"

    echo "$prefix $b_head"

    echo "$big_prefix Update patch by $filename"    

    (cd ..; echo $diff_string >> $patch_name_new);

    (cat $filename | head -n2 | head -n1 >> ../$patch_name_new);

    (cat $filename | head -n2 | tail -n1 >> ../$patch_name_new);

    (cd ..; diff -ruN $a_path $b_path | tail -n+3 >> $patch_name_new);

done;

cd ..;

echo "$prefix Rename temporary patch to final"

cat $patch_name_new > $patch_name;

echo "$prefix Remove temporary files"

rm $patch_name_new;

rm -rf $patch_name_split;

echo "$big_prefix Complete"