How to release cloud.google.com/go

1. Determine the current release version with git tag -l. It should look something like vX.Y.Z. We'll call the current version $CV and the new version $NV.
2. On master, run git log $CV... to list all the changes since the last release. NOTE: You must manually exclude changes from submodules [1].
3. Edit CHANGES.md to include a summary of the changes.
4. cd internal/version && go generate && cd -
5. ./tidyall.sh
6. Mail the CL. When the CL is approved, submit it.
7. Without submitting any other CLs: a. Switch to master. b. git pull c. Tag the repo with the next version: git tag $NV. d. Push the tag: git push origin $NV.
8. Update the releases page with the new release, copying the contents of CHANGES.md.

How to release a submodule

We have several submodules, including cloud.google.com/go/logging, cloud.google.com/go/datastore, and so on.

To release a submodule:

1. (these instructions assume we're releasing cloud.google.com/go/datastore - adjust accordingly)
2. Determine the current release version with git tag -l. It should look something like datastore/vX.Y.Z. We'll call the current version $CV and the new version $NV, which should look something like datastore/vX.Y+1.Z (assuming a minor bump).
3. On master, run git log $CV.. -- datastore/ to list all the changes to the submodule directory since the last release.
4. Edit datastore/CHANGES.md to include a summary of the changes.
5. ./tidyall.sh
6. cd internal/version && go generate && cd -
7. Mail the CL. When the CL is approved, submit it.
8. Without submitting any other CLs: a. Switch to master. b. git pull c. Tag the repo with the next version: git tag $NV. d. Push the tag: git push origin $NV.
9. Update the releases page with the new release, copying the contents of datastore/CHANGES.md.

Appendix

1: This should get better as submodule tooling matures.