goupdate is a tool for keeping your go.mod file updated without breaking everything.

For projects of sufficient size, just running go get -u ./... will break your code. goupdate can figure out which updates are safe to apply, and which are not.

$ go get github.com/crewjam/goupdate
$ goupdate

• -c - The root directory of the module to update (default ".")
• -test - The command that evaluates if an update works (default "go test ./...")
• -commit - Commit changes on success
• -v - Show output from test command

First, we run go get -u ./... to determine which packages are to be upgraded. Then we check that candidate set of upgrades to see if the tests pass. If the tests do not pass, we split the upgrades in half (bisect them), and check each half separately. We repeat this process until we have a list of good and bad updates. Finally, we reset go.mod to that it contains only the good updates.