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gen-changelog.sh
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gen-changelog.sh
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# Requires Github CLI and `jq`
# Usage: `./gen-changelog.sh YYYY-mm-dd`
# Generates changelog entries for all PRs merged on or after the given date.
set -e
PULLS='[]'
CURSOR='null'
MIN_MERGED_AT=$(date --date="$1" +%s)
while true
do
# Use the GraphQL API to paginate merged pull requests.
# The REST API doesn't allow filtering only merged pull requests.
# We scan all merged pull requests from the beginning because it's not unheard of to have a very old PR finally get
# merged; e.g. #1081, merged a year and a half after it was opened.
if [ "$CURSOR" != "null" ];
then
PAGE=$(gh api graphql -f after="$CURSOR" -f query='query($after: String) {
repository(owner: "launchbadge", name: "sqlx") {
pullRequests(first:100,orderBy: {field:CREATED_AT, direction:ASC},states:MERGED, after: $after) {
nodes {
number
author { login }
title
url
mergedAt
}
pageInfo {
hasNextPage
endCursor
}
}
}
}');
else
PAGE=$(gh api graphql -f query='query {
repository(owner: "launchbadge", name: "sqlx") {
pullRequests(first:100,orderBy: {field:CREATED_AT, direction:ASC},states:MERGED) {
nodes {
number
author { login }
title
url
mergedAt
}
pageInfo {
hasNextPage
endCursor
}
}
}
}');
fi
CURSOR=$(echo "$PAGE" | jq -r '.data.repository.pullRequests.pageInfo.endCursor');
HAS_NEXT_PAGE=$(echo "$PAGE" | jq '.data.repository.pullRequests.pageInfo.hasNextPage');
PULLS=$(echo "$PAGE" | jq "$PULLS + (.data.repository.pullRequests.nodes | map(select(.mergedAt | fromdate >= $MIN_MERGED_AT)))");
# can't use `"$CURSOR" == 'null'` because the last page still gives a valid cursor
if ! $HAS_NEXT_PAGE; then break; fi;
done
COUNT=$(echo "$PULLS" | jq "length");
echo "Found $COUNT pull requests merged on or after $1\n"
if [ -z $COUNT ]; then exit 0; fi;
echo "Entries:"
echo "$PULLS" | jq -r 'map("* [[#\(.number)]]: \(.title) [[@\(.author.login)]]") | join("\n")'
echo "\nLinks:"
echo "$PULLS" | jq -r 'map("[#\(.number)]: \(.url)") | join("\n")'
echo "\nNew Authors:"
DUPE_AUTHORS=''
# Generate link entries for new authors at the end of the changelog.
echo "$PULLS" | jq -r '.[].author.login' | while read author; do
author_url="https://github.com/$author"
author_entry="[@$author]: $author_url"
# Check if the entry already exists in the changelog or in our list of new authors.
if grep -qF "$author_entry" CHANGELOG.md || echo "$DUPE_AUTHORS" | grep -qF "$author_entry";
then continue;
fi;
DUPE_AUTHORS="$DUPE_AUTHORS$author_entry\n"
echo $author_entry
done