#!/bin/bash -

set -e

# Maintainer script to copy patches from the git repo to the current

# directory.  Use it like this:

#   ./copy-patches.sh

rhel_version=8.8.0

# Check we're in the right directory.

if [ ! -f virt-v2v.spec ]; then

    echo "$0: run this from the directory containing 'virt-v2v.spec'"

    exit 1

fi

git_checkout=$HOME/d/virt-v2v-rhel-$rhel_version

if [ ! -d $git_checkout ]; then

    echo "$0: $git_checkout does not exist"

    echo "This script is only for use by the maintainer when preparing a"

    echo "virt-v2v release on RHEL."

    exit 1

fi

# Get the base version of virt-v2v.

version=`grep '^Version:' virt-v2v.spec | awk '{print $2}'`

tag="v$version"

# Remove any existing patches.

git rm -f [0-9]*.patch ||:

rm -f [0-9]*.patch

# Get the patches.

(

  cd $git_checkout

  rm -f [0-9]*.patch

  # Ignore some directories in common/ which are not in the virt-v2v tarball.

  ignoredirs="edit mlvisit parallel progress structs visit windows"

  rm -f common/.gitattributes

  for i in $ignoredirs; do

      echo "$i/* -diff" >> common/.gitattributes

  done

  git -c core.abbrev=8 format-patch -O/dev/null --subject-prefix=PATCH -N \

      --submodule=diff --no-signature --patience $tag

  # However the .gitattributes doesn't completely ignore them but produces

  # Binary files a/... and b/... differ

  # which prevents the patches from being applied so we must remove that too.

  for i in $ignoredirs; do

      sed -i "/^diff --git a\/common\/$i/,/^Binary files a\/common\/$i/{d;}" [0-9]*.patch

  done

  rm common/.gitattributes

)

mv $git_checkout/[0-9]*.patch .

# Remove any not to be applied.

rm -f *NOT-FOR-RPM*.patch

# Add the patches.

git add [0-9]*.patch

# Print out the patch lines.

echo

echo "--- Copy the following text into virt-v2v.spec file"

echo

echo "# Patches."

for f in [0-9]*.patch; do

    n=`echo $f | awk -F- '{print $1}'`

    echo "Patch$n:     $f"

done

echo

echo "--- End of text"