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require "fileutils"
# Helper method to insert text after a line that matches the regex
def insert_after_line(file, insert, regex = /^## Next/)
tempfile = File.open("#{file}.tmp", "w")
f = File.new(file)
f.each do |line|
tempfile << line
next unless line =~ regex
tempfile << "\n"
tempfile << insert
tempfile << "\n"
end
f.close
tempfile.close
FileUtils.mv("#{file}.tmp", file)
end
# Extracts all changes that have been made after the latest pushed tag
def changes_since_last_tag
`git --no-pager log $(git describe --tags --abbrev=0)..HEAD --grep="Merge" --pretty=format:"%t - %s%n%b%n"`
end
# Extracts all github users contributed since last tag
def users_since_last_tag
`git --no-pager log $(git describe --tags --abbrev=0)..HEAD --grep="Merge" --pretty=format:"%s" | cut -d' ' -f 6 | cut -d/ -f1 | sort | uniq`
end
namespace :changelog do
task :generate do
insert_after_line("CHANGELOG.md", changes_since_last_tag, /^## Next/)
contributors = users_since_last_tag.split("\n").map { |name| "@" + name }
printf("Huge thanks to all our contributors 🎆\n")
printf("Special thanks to: " + contributors.join(" ") + "\n")
printf("\nI'll merge this and release the gem once all tests pass.\n")
end
end
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