#!/usr/bin/env bash
#
# generate-changelog-info.sh
# Author: Mihai Criveti
#
# Dump to one file:
# 1. Full commit logs since a tag
# 2. A chronologically-sorted list of issues closed since that tag
# 3. Full JSON-formatted details for every one of those issues
#
# Dependencies: git, GitHub CLI (`gh`), jq
# Usage: ./generate-changelog-info.sh [TAG] [OUTPUT_FILE]
# TAG defaults to v0.1.1
# OUTPUT_FILE defaults to changelog_info.txt
#
set -euo pipefail
TAG=${1:-v0.2.0}
OUT=${2:-changelog_info.txt}
###############################################################################
# 1. Commit log
###############################################################################
{
echo "#############################"
echo "## COMMITS since ${TAG}"
echo "#############################"
} >"$OUT"
git log "${TAG}"..HEAD --reverse --no-merges \
--pretty=format:'%H%nAuthor: %an <%ae>%nDate: %ad%n%n%s%n%n%b%n----' \
--date=short >>"$OUT"
###############################################################################
# 2. Closed-issue list (oldest → newest)
###############################################################################
CUTOFF=$(git log -1 --format=%cI "$TAG") # ISO time of the tag
echo -e "\n#############################" >>"$OUT"
echo "## ISSUES closed since ${TAG}" >>"$OUT"
echo "#############################" >>"$OUT"
ISSUES_JSON=$(gh issue list --state closed \
--search "closed:>=$CUTOFF" \
--limit 1000 \
--json number,title,closedAt,url)
echo "$ISSUES_JSON" | jq -r '
sort_by(.closedAt)[]
| "#\(.number) - \(.title) (closed: \(.closedAt))"
' >>"$OUT"
###############################################################################
# 3. Full issue details
###############################################################################
echo -e "\n#############################" >>"$OUT"
echo "## ISSUE DETAILS" >>"$OUT"
echo "#############################" >>"$OUT"
# Extract the numbers, then loop for detailed views
echo "$ISSUES_JSON" | jq -r '.[].number' | while read -r NUM; do
echo -e "\n---- ISSUE #$NUM ----" >>"$OUT"
gh issue view "$NUM" --json number,title,author,labels,assignees,closedAt,createdAt,url,body \
| jq -r '
"Number: \(.number)",
"Title: \(.title)",
"URL: \(.url)",
"Author: \(.author.login // "unknown")",
"Labels: \(.labels | map(.name) | join(", "))",
"Assignees: \(.assignees | map(.login) | join(", "))",
"Created: \(.createdAt)",
"Closed: \(.closedAt)",
"",
"Body:\n" + (.body // "*No description*")
' >>"$OUT"
done
echo -e "\nAll done! Results written to: $OUT"
