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#!/usr/bin/env bash
set -e
set -u
set -o pipefail
readonly URL='https://github.com/MetaMask/metamask-extension'
git fetch --tags
most_recent_tag="$(git describe --tags "$(git rev-list --tags --max-count=1)")"
git rev-list "${most_recent_tag}"..HEAD | while read commit
do
subject="$(git show -s --format="%s" "$commit")"
# Squash & Merge: the commit subject is parsed as `<description> (#<PR ID>)`
if grep -E -q '\(#[[:digit:]]+\)' <<< "$subject"
then
pr="$(awk '{print $NF}' <<< "$subject" | tr -d '()')"
prefix="[$pr]($URL/pull/${pr###}): "
description="$(awk '{NF--; print $0}' <<< "$subject")"
# Merge: the PR ID is parsed from the git subject (which is of the form `Merge pull request
# #<PR ID> from <branch>`, and the description is assumed to be the first line of the body.
# If no body is found, the description is set to the commit subject
elif grep -E -q '#[[:digit:]]+\sfrom' <<< "$subject"
then
pr="$(awk '{print $4}' <<< "$subject")"
prefix="[$pr]($URL/pull/${pr###}): "
first_line_of_body="$(git show -s --format="%b" "$commit" | head -n 1 | tr -d '\r')"
if [[ -z "$first_line_of_body" ]]
then
description="$subject"
else
description="$first_line_of_body"
fi
# Normal commits: The commit subject is the description, and the PR ID is omitted.
else
pr=''
prefix=''
description="$subject"
fi
# add entry to CHANGELOG
if [[ "$OSTYPE" == "linux-gnu" ]]
then
# shellcheck disable=SC1004
sed -i'' '/## Current Develop Branch/a\
- '"$prefix$description"''$'\n' CHANGELOG.md
else
# shellcheck disable=SC1004
sed -i '' '/## Current Develop Branch/a\
- '"$prefix$description"''$'\n' CHANGELOG.md
fi
done
echo 'CHANGELOG updated'
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