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141 lines
6.5 KiB
Markdown
141 lines
6.5 KiB
Markdown
# Releasing
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## Determine which module to release
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The Go client libraries have several modules. Each module does not strictly
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correspond to a single library - they correspond to trees of directories. If a
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file needs to be released, you must release the closest ancestor module.
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To see all modules:
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```bash
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$ cat `find . -name go.mod` | grep module
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module cloud.google.com/go/pubsub
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module cloud.google.com/go/spanner
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module cloud.google.com/go
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module cloud.google.com/go/bigtable
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module cloud.google.com/go/bigquery
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module cloud.google.com/go/storage
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module cloud.google.com/go/pubsublite
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module cloud.google.com/go/firestore
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module cloud.google.com/go/logging
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module cloud.google.com/go/internal/gapicgen
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module cloud.google.com/go/internal/godocfx
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module cloud.google.com/go/internal/examples/fake
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module cloud.google.com/go/internal/examples/mock
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module cloud.google.com/go/datastore
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```
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The `cloud.google.com/go` is the repository root module. Each other module is
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a submodule.
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So, if you need to release a change in `bigtable/bttest/inmem.go`, the closest
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ancestor module is `cloud.google.com/go/bigtable` - so you should release a new
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version of the `cloud.google.com/go/bigtable` submodule.
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If you need to release a change in `asset/apiv1/asset_client.go`, the closest
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ancestor module is `cloud.google.com/go` - so you should release a new version
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of the `cloud.google.com/go` repository root module. Note: releasing
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`cloud.google.com/go` has no impact on any of the submodules, and vice-versa.
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They are released entirely independently.
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## Test failures
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If there are any test failures in the Kokoro build, releases are blocked until
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the failures have been resolved.
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## How to release
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### Automated Releases (`cloud.google.com/go` and submodules)
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We now use [release-please](https://github.com/googleapis/release-please) to
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perform automated releases for `cloud.google.com/go` and all submodules.
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1. If there are changes that have not yet been released, a
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[pull request](https://github.com/googleapis/google-cloud-go/pull/2971) will
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be automatically opened by release-please
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with a title like "chore: release X.Y.Z" (for the root module) or
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"chore: release datastore X.Y.Z" (for the datastore submodule), where X.Y.Z
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is the next version to be released. Find the desired pull request
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[here](https://github.com/googleapis/google-cloud-go/pulls)
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1. Check for failures in the
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[continuous Kokoro build](http://go/google-cloud-go-continuous). If there are
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any failures in the most recent build, address them before proceeding with
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the release. (This applies even if the failures are in a different submodule
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from the one being released.)
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1. Review the release notes. These are automatically generated from the titles
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of any merged commits since the previous release. If you would like to edit
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them, this can be done by updating the changes in the release PR.
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1. To cut a release, approve and merge the pull request. Doing so will
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update the `CHANGES.md`, tag the merged commit with the appropriate version,
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and draft a GitHub release which will copy the notes from `CHANGES.md`.
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### Manual Release (`cloud.google.com/go`)
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If for whatever reason the automated release process is not working as expected,
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here is how to manually cut a release of `cloud.google.com/go`.
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1. Check for failures in the
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[continuous Kokoro build](http://go/google-cloud-go-continuous). If there are
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any failures in the most recent build, address them before proceeding with
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the release.
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1. Navigate to `google-cloud-go/` and switch to master.
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1. `git pull`
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1. Run `git tag -l | grep -v beta | grep -v alpha` to see all existing releases.
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The current latest tag `$CV` is the largest tag. It should look something
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like `vX.Y.Z` (note: ignore all `LIB/vX.Y.Z` tags - these are tags for a
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specific library, not the module root). We'll call the current version `$CV`
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and the new version `$NV`.
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1. On master, run `git log $CV...` to list all the changes since the last
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release. NOTE: You must manually visually parse out changes to submodules [1]
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(the `git log` is going to show you things in submodules, which are not going
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to be part of your release).
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1. Edit `CHANGES.md` to include a summary of the changes.
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1. In `internal/version/version.go`, update `const Repo` to today's date with
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the format `YYYYMMDD`.
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1. In `internal/version` run `go generate`.
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1. Commit the changes, ignoring the generated `.go-r` file. Push to your fork,
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and create a PR titled `chore: release $NV`.
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1. Wait for the PR to be reviewed and merged. Once it's merged, and without
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merging any other PRs in the meantime:
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a. Switch to master.
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b. `git pull`
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c. Tag the repo with the next version: `git tag $NV`.
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d. Push the tag to origin:
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`git push origin $NV`
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1. Update [the releases page](https://github.com/googleapis/google-cloud-go/releases)
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with the new release, copying the contents of `CHANGES.md`.
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### Manual Releases (submodules)
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If for whatever reason the automated release process is not working as expected,
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here is how to manually cut a release of a submodule.
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(these instructions assume we're releasing `cloud.google.com/go/datastore` - adjust accordingly)
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1. Check for failures in the
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[continuous Kokoro build](http://go/google-cloud-go-continuous). If there are
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any failures in the most recent build, address them before proceeding with
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the release. (This applies even if the failures are in a different submodule
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from the one being released.)
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1. Navigate to `google-cloud-go/` and switch to master.
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1. `git pull`
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1. Run `git tag -l | grep datastore | grep -v beta | grep -v alpha` to see all
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existing releases. The current latest tag `$CV` is the largest tag. It
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should look something like `datastore/vX.Y.Z`. We'll call the current version
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`$CV` and the new version `$NV`.
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1. On master, run `git log $CV.. -- datastore/` to list all the changes to the
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submodule directory since the last release.
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1. Edit `datastore/CHANGES.md` to include a summary of the changes.
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1. In `internal/version` run `go generate`.
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1. Commit the changes, ignoring the generated `.go-r` file. Push to your fork,
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and create a PR titled `chore(datastore): release $NV`.
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1. Wait for the PR to be reviewed and merged. Once it's merged, and without
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merging any other PRs in the meantime:
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a. Switch to master.
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b. `git pull`
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c. Tag the repo with the next version: `git tag $NV`.
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d. Push the tag to origin:
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`git push origin $NV`
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1. Update [the releases page](https://github.com/googleapis/google-cloud-go/releases)
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with the new release, copying the contents of `datastore/CHANGES.md`.
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