update-changelog.sh

#!/usr/bin/env bash

set -euo pipefail

DEV_CHANGES_DIR=$1
EMQX_VERSION=$2

[ -z "${DEBUG:-}" ] || set -x

process_changes() {
    edition=$1

    [ ! -d $DEV_CHANGES_DIR/$edition ] && return

    # Add a section for the new version if it doesn't exist along with the Enhancements and Bug Fixes sections
    if ! grep -q "^## $EMQX_VERSION" en_US/changes/changes-$edition-v5.md; then
        sed -i "3i ## $EMQX_VERSION\n" en_US/changes/changes-$edition-v5.md
        sed -i "5i ### Enhancements\n" en_US/changes/changes-$edition-v5.md
        sed -i "7i ### Bug Fixes\n" en_US/changes/changes-$edition-v5.md
    fi

    # Get the line number of the Enhancements section
    enhancements_ln=$(grep -n '^### Enhancements' en_US/changes/changes-$edition-v5.md | head -n 1 | cut -d: -f1)
    # Increment the line number to leave a blank line before the first enhancement
    enhancements_ln=$((enhancements_ln + 1))

    shopt -s nullglob

    for f in $DEV_CHANGES_DIR/$edition/fix-*.md $DEV_CHANGES_DIR/$edition/feat-*.md; do
        pr_num="$(echo "${f}" | sed -E 's/.*-([0-9]+)\.[a-z]+\.md$/\1/')"
        if ! grep -q "^- \[#$pr_num\]" en_US/changes/changes-$edition-v5.md; then
            if [ $pr_num -lt 10000 ]; then
                repo='emqx-platform'
            else
                repo='emqx'
            fi
            {
                echo "- [#${pr_num}](https://github.com/emqx/$repo/pull/${pr_num}) $(head -n 1 "$f")"
                # indent the content
                tail -n +2 "$f" | sed '/^$/!s/^/  /'
                echo ""
            } > /tmp/$pr_num.md

            if [[ "$f" =~ ^$DEV_CHANGES_DIR/$edition/feat-.*\.md ]]; then
                sed -i "${enhancements_ln}r /tmp/$pr_num.md" en_US/changes/changes-$edition-v5.md
            elif [[ "$f" =~ ^$DEV_CHANGES_DIR/$edition/fix-.*\.md ]]; then
                # Get the line number of the Bug Fixes section
                bugfixes_ln=$(grep -n 'Bug Fixes' en_US/changes/changes-$edition-v5.md | head -n 1 | cut -d: -f1)
                # Increment the line number to leave a blank line before the first bug fix
                bugfixes_ln=$((bugfixes_ln + 1))
                sed -i "${bugfixes_ln}r /tmp/$pr_num.md" en_US/changes/changes-$edition-v5.md
            fi
        fi
    done

    # count number of files matching $DEV_CHANGES_DIR/$edition/breaking-*.md pattern
    num_files=$(find $DEV_CHANGES_DIR/$edition -type f -name 'breaking-*.md' | wc -l)
    # exit the function if no breaking changes files are found
    [ $num_files -eq 0 ] && return

    major_minor=$(echo $EMQX_VERSION | cut -d. -f1,2)

    # create en_US/changes/breaking-changes-$edition-$major_minor.md if it does not exist
    if [ ! -f en_US/changes/breaking-changes-$edition-$major_minor.md ]; then
        echo "# Incompatible Changes in EMQX $major_minor" > en_US/changes/breaking-changes-$edition-$major_minor.md
        echo "" >> en_US/changes/breaking-changes-$edition-$major_minor.md
        echo "" >> en_US/changes/breaking-changes-$edition-$major_minor.md
    fi

    # Add a section for the new version in breaking-changes if it doesn't exist
    if ! grep -q "^## $EMQX_VERSION" en_US/changes/breaking-changes-$edition-$major_minor.md; then
        version=$( [[ $edition = ce ]] && echo "v$EMQX_VERSION" || echo "e$EMQX_VERSION" )
        sed -i "3i ## $version\n" en_US/changes/breaking-changes-$edition-$major_minor.md
    fi

    for f in $DEV_CHANGES_DIR/$edition/breaking-*.md; do
        pr_num="$(echo "${f}" | sed -E 's/.*-([0-9]+)\.[a-z]+\.md$/\1/')"
        if ! grep -q "^- \[#$pr_num\]" en_US/changes/breaking-changes-$edition-$major_minor.md; then
            if [ $pr_num -lt 10000 ]; then
                repo='emqx-platform'
            else
                repo='emqx'
            fi
            {
                echo "- [#${pr_num}](https://github.com/emqx/$repo/pull/${pr_num}) $(head -n 1 "$f")"
                # indent the content
                tail -n +2 "$f" | sed '/^$/!s/^/  /'
                echo ""
            } > /tmp/$pr_num.md

            sed -i "4r /tmp/$pr_num.md" en_US/changes/breaking-changes-$edition-$major_minor.md
        fi
    done
}

process_changes ce
process_changes ee