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#!/usr/bin/env bash
#
# Checks the number of lint issues against historical values. Used in
# Travis CI builds to fail when the number increases by exploiting the
# caching mechanism.
if [[ $# != 2 || ! -f $1 ]]; then \
echo "Usage: $0 <lint.xml file> <historical.xml file>"
exit 1
fi
lint_file="$1"
historical_file="$2"
xmllint="$(which xmllint)"
if [[ ! -x $xmllint ]]; then \
echo "Error: cannot find xmllint"
exit 1
fi
if [[ ! -f $historical_file ]]; then \
# no cache history, store this one and exit
cp $lint_file $historical_file
exit 0
fi
tmp_dir="$(mktemp -d lint.XXXXXXXX)"
trap "rm -rf $tmp_dir" ERR EXIT
lint_results="$tmp_dir/lint.txt"
hist_results="$tmp_dir/hist.txt"
echo "cat //issue/location" | \
xmllint --shell $historical_file | \
grep '<location' >$lint_results
echo "cat //issue/location" | \
xmllint --shell $lint_file | \
grep '<location' >$hist_results
old_count=$(cat $lint_results | wc -l)
new_count=$(cat $hist_results | wc -l)
echo "Historical count : $old_count, new count : $new_count"
if [[ $new_count > $old_count ]]; then \
echo "FAILURE: lint issues increased from $old_count to $new_count"
diff $lint_results $hist_results
exit 2
fi
if [[ $TRAVIS_PULL_REQUEST == false ]]; then \
# Okay, we either stayed the same or reduced our number.
# Write it out so we can check it next build!
cp $lint_file $historical_file
fi
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