gta is an application which finds Go packages that have deviated from their upstream source in git. A typical situation is when a project is using a monorepo. At build or continuous integration time, you won't have to build every single package since you will know which packages (and dependencies) have changed.

go install github.com/digitalocean/gta/cmd/gta

After installation, you will have a gta binary in $GOPATH/bin/

List packages that should be tested since they have deviated from master.

gta -include "$(go list -f '{{ .Module.Path }}')/"

List packages that have deviated from the most recent merge commit.

gta -include "$(go list -f '{{ .Module.Path }}')/"

gta builds a list of "dirty" (changed) packages from master, using git. This is useful for determining which tests to run in larger monorepo style repositories.

gta works by implementing a various set of interfaces, namely the Differ and Packager interfaces.

Note: When using this tool, it is common to hit the maximum number of open file descriptors limit set by your OS. On macOS, this may be a measly 256. Consider raising that maximum to something reasonable with:

sudo ulimit -n 4096

This application is distributed under the Apache 2 license found in LICENSE