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#!/usr/bin/env bash
changelogFile=${1:-CHANGELOG.md}
if [ ! -r "$changelogFile" ]; then
echo "Unable to read file $changelogFile" >&2
exit 1
fi
changelogWellFormed=1
# e.g. "## 1.12.3 (2016-10-26)"
VER_LINE_REGEX='^## [0-9]+\.[0-9]+\.[0-9]+(-ce)? \([0-9]+-[0-9]+-[0-9]+\)$'
while read -r line; do
if ! [[ "$line" =~ $VER_LINE_REGEX ]]; then
echo "Malformed changelog $changelogFile line \"$line\"" >&2
changelogWellFormed=0
fi
done < <(grep '^## ' $changelogFile)
if [[ "$changelogWellFormed" == "1" ]]; then
echo "Congratulations! Changelog $changelogFile is well-formed."
else
exit 2
fi
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