ghc-rpm-macros/cabal-tweak-remove-upperbound

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#!/bin/sh
set -e +x
function fail {
echo "$0: $1" >&2
exit 1
}
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USAGE="Usage: $0 dep"
if [ $# -ne 1 ]; then
fail "$USAGE"
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fi
DEP=$1
CABALFILE=$(ls *.cabal)
if [ $(echo $CABALFILE | wc -w) -ne 1 ]; then
fail "There needs to be one .cabal file in the current dir!"
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fi
BREAK=[^[:alnum:]-]
if ! grep -q "$BREAK$DEP$BREAK[^,]*" $CABALFILE; then
fail "$CABALFILE does not match: $DEP"
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fi
if [ ! -f $CABALFILE.orig ]; then
BACKUP=.orig
fi
if grep -q "$BREAK$DEP$BREAK[^,]*&&" $CABALFILE; then
sed -i$BACKUP -e "s/\($BREAK$DEP$BREAK[^&,]*[^ ]\+\) *&&[^,]*/\1/g" $CABALFILE
fi
if grep -q "$BREAK$DEP$BREAK[^,]*==" $CABALFILE; then
sed -i$BACKUP -e "s/\($BREAK$DEP$BREAK[^=,]*\)==\([^,*]*\)\.\*/\1>=\2/g" $CABALFILE
fi