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#!/bin/bash
#
# Convert a package from source format '1.0' to '3.0 (quilt)', git-committing
# in the process
#
# For each patch in the quilt series:
# (1) Copy the top-most patch to debian/patches
# (2) Reverse-apply that patch from HEAD
# (3) git commit the result.
set -ev
# Path to git repository with the source in source in format 1.0
patch_dest="cron"
# Path to directory with source in format 3.0 (quilt)
patch_source="conv3"
# For the commit log
author="Christian Kastner <ckk@kvr.at>"
echo "Converting $patch_dest to source format 3.0 (quilt) using patches from $patch_source..."
# Initialize the debian/patches dir
mkdir -p "$patch_dest/debian/patches/"{fixes,features}
touch "$patch_dest/debian/patches/series"
# We undo patches from current HEAD, ie from tail of the quilt series. This
# would leave us with a series file reverse order. We fix this by rotating
# around in each iteration
series_file="$patch_dest/debian/patches/series"
series_prev="$patch_dest/debian/patches/series.prev"
# For each patch in the new series IN REVERSE,
tac "$patch_source/debian/patches/series" |
while read patch_name
do
echo "$patch_name"
cp "$patch_source/debian/patches/$patch_name" "$patch_dest/debian/patches/$patch_name"
# Generate the new series file by:
# (1) moving the old one out of the way
mv "$series_file" "$series_prev"
# (2) adding the currenty patch to new, empty series
echo "$patch_name" > "$series_file"
# (3) appending the old series to this new series
cat "$series_prev" >> "$series_file"
rm -f "$series_prev"
# Reverse-apply the patch, then commit the result
cd "$patch_dest"
patch -R -p1 < "debian/patches/$patch_name"
git add .
git commit --author="$author" -m "Extract patch $patch_name from original source"
cd -
done
cd "$patch_dest"
echo "3.0 (quilt)" > "debian/source/format"
git add .
git commit --author="$author" -m "Switch package to source format 3.0 (quilt)"
cd -
echo "Conversion complete!"
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