Fetching long codebuild output (or indeed any other cloudwatch logs) is painful, because you need to click 8,000 times with a long wait every time. Searching only shows the individual lines that match - rather than the surrounding output.

Additionally, the AWS CLI doesn't help much - because it doesn't automatically fetch all pages. So it needs to be wrapped in a script like https://gist.github.com/gholker/88639858d53ae3ccec7ddd306cd8ba22#file-download-aws-logs-sh

This simple ruby script will fetch all the logs for a given log group and log stream.

Use rbenv install or similar to install the correct version of Ruby.

Then, use bundle to install the aws-sdk-cloudwatchlogs gem.

You can then use a command like this to write the log to a file on your desktop.

bundle exec ./fetch-cloudwatch-logs.rb /aws/codebuild/my-log-group uuid-over-here > ~/Desktop/uuid-over-here.txt

If you use aws-vault you can use a command like this to run things in the right aws environment

aws-vault exec the-environment-name -- bundle exec ./fetch-cloudwatch-logs.rb /aws/codebuild/my-log-group uuid-over-here > ~/Desktop/uuid-over-here.txt