OHAI CHANGLOG

changelog.sh

#!/usr/bin/env bash

# this is used to make the git log command less blorky
GH_URL_BASE='http://github.com/misterbrownlee/stupidstuff/'

# tell folks wassup
echo -e "Let's make a changelog!\n"

# get the current end of the commit range
MEOW=`git describe --abbrev=0 | cut -c 2-`

# get the low end of the commit range
echo "Adding new commits will span from a past version to the current version"
read -p 'Enter past version for generting the list of commits:  v' LAST_VERSION

# make room for writing a new changelog file
mv CHANGELOG.md CHANGELOG.md.temp

# write some boilerplate into a new changelog file and append more things
printf '# OHAI Changelog\n\n' > CHANGELOG.md
printf '# v'$MEOW' \n' >> CHANGELOG.md
printf 'Published as `stupid-stuff@'$MEOW'`\n\n' >> CHANGELOG.md
printf '### Release Notes\n\n<WRITE NOTES HERE>\n\n' >> CHANGELOG.md
printf '### Commits\n' >> CHANGELOG.md

# now call git log with the version range and append that into the file
git log v$LAST_VERSION...HEAD^ \
   --pretty=format:"- %s ([%h]($GH_URL_BASE%H))" \
    >> CHANGELOG.md

# more newlines is need for format helping
printf '\n\n' >> CHANGELOG.md

# last we append content of the orginal changelog file into the new file
# minus the header...
# fancy, right?
tail -n +2 "CHANGELOG.md.temp" >> CHANGELOG.md

# clean up the temp file
rm CHANGELOG.md.temp

# tada!
echo 'DONE... commit the new changelog after adding TL;DR release notes'