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51 lines
981 B
51 lines
981 B
12 years ago
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#!/bin/sh
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# TODO:
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# support "$0 FLAG NEW" when no upstream default
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set -e +x
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USAGE="Usage: $0 FLAG OLD NEW"
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if [ $# -ne 3 ]; then
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echo "$USAGE"
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exit 1
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fi
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FLAG=$1
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OLD=$2
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NEW=$3
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if [ "$OLD" = "$NEW" ]; then
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echo "Old and new value can't be the same!"
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exit 1
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fi
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CABALFILE=$(ls *.cabal)
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if [ $(echo $CABALFILE | wc -w) -ne 1 ]; then
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echo "There needs to be one .cabal file in the current dir!"
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exit 1
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fi
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if ! grep -q -i "^flag *$FLAG" $CABALFILE; then
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echo "$CABALFILE does have flag $FLAG"
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exit 1
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fi
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if ! grep -A3 -i "^flag *$FLAG" $CABALFILE | grep -q -i "default:"; then
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echo "$CABALFILE: $FLAG flag might not have a default"
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exit 1
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fi
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if ! grep -A3 -i "^flag *$FLAG" $CABALFILE | grep -q -i "default: *$OLD"; then
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echo "$CABALFILE: $FLAG flag already defaults to $NEW"
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exit 1
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fi
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if [ ! -f $CABALFILE.orig ]; then
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BACKUP=.orig
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fi
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sed -i$BACKUP -e "/[Ff]lag *$FLAG/,/[Dd]efault: *$OLD/ s/\([Dd]efault: *\)$OLD/\1$NEW/" $CABALFILE
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