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#!/bin/bash
# Ensure script is run at the root of a git repository
git rev-parse --is-inside-work-tree &>/dev/null || { echo "Not inside a git repository"; exit 1; }
# Find all .go files tracked by git
git ls-files "*.go" | while read -r file; do
# Skip files that don't have a copyright belonging to "The NATS Authors"
current_copyright=$(grep -oE "^// Copyright [0-9]{4}(-[0-9]{4})? The NATS Authors" "$file" || echo "")
[[ -z "$current_copyright" ]] && continue
# Get the last commit year for the file
last_year=$(git log --follow --format="%ad" --date=format:%Y -- "$file" | head -1)
existing_years=$(echo "$current_copyright" | grep -oE "[0-9]{4}(-[0-9]{4})?")
# Determine the new copyright range
if [[ "$existing_years" =~ ^([0-9]{4})-([0-9]{4})$ ]]; then
first_year=${BASH_REMATCH[1]}
new_copyright="// Copyright $first_year-$last_year The NATS Authors"
elif [[ "$existing_years" =~ ^([0-9]{4})$ ]]; then
first_year=${BASH_REMATCH[1]}
if [[ "$first_year" == "$last_year" ]]; then
new_copyright="// Copyright $first_year The NATS Authors"
else
new_copyright="// Copyright $first_year-$last_year The NATS Authors"
fi
else
continue # If the format is somehow incorrect, skip the file
fi
# Update the first line
if sed --version &>/dev/null; then
# Linux sed
sed -i "1s|^// Copyright.*|$new_copyright|" "$file"
else
# BSD/macOS sed, needs -i ''
sed -i '' "1s|^// Copyright.*|$new_copyright|" "$file"
fi
done
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