Script to release package in GitHub with automatic release notes.

release.sh

# Check parameters
[ -z "$1" ] && echo "usage: release <vX.X.X | minor | patch> [--no-preview|-np]" && exit 1

# Test parameters are valid
[[ ! "$1" =~ ^(v[0-9]\.[0-9]\.?[0-9]?|minor|patch)$ ]] && echo -e "Wrong parameter(s)!\nusage: release <vX.X.X | minor | patch> [--no-preview|-np]" && exit 2

# Make sure to fetch all remote before proceeding
GF=$(git fetch 2> /dev/null)
[[ ! "$?" = 0 ]] && echo -e "Git permission denied!\nusage: release <vX.X.X | minor | patch> [--no-preview|-np]" && exit 3

# Make sure local and remote are identical
GD=$(git diff --quiet 2> /dev/null)
[[ ! "$?" = 0 ]] && echo -e "Git local different than remote!\nusage: release <vX.X.X | minor | patch> [--no-preview|-np]" && exit 3

# Get Current Version
CV=$(gh release view --json tagName | jq -r '.tagName')
PARTS=($(echo $CV | tr '.' ' '))

# Build next version
NV=$1
if [ "$NV" == "minor" ]; then
    NV="${PARTS[0]}.$((${PARTS[1]}+1)).0"
elif [ "$NV" == "patch" ]; then
    NV="${PARTS[0]}.${PARTS[1]}.$((${PARTS[2]}+1))"
fi

# Collect notes (see https://stackoverflow.com/questions/12082981/get-all-git-commits-since-last-tag)
LOG=$(git log $CV..HEAD --oneline --no-decorate | sed 's/^/- /')
TITLE="### $NV / $(date +%Y-%m-%d)"
NOTES="$TITLE\n$LOG\n"
echo -e "Last version was $CV, will release version $NV (notes below)...\n"
echo -e "$NOTES"

NP=${2:-"X"}
if [ "$NP" != "--no-preview" ] && [ "$NP" != "-np" ]; then
    # Preview mode
    echo "Preview mode (append '-np' or '-no-preview' to release) ..."
else
    # Release and fetch back
    echo gh release create $NV --title "$NV" --notes "$NOTES"
    echo git pull --rebase
fi