Contributing

File an issue. The issue will be used to discuss the bug or feature and should be created before sending a PR.
Install Go.
1. Ensure that your GOBIN directory (by default $(go env GOPATH)/bin) is in your PATH.
2. Check it's working by running go version.
  - If it doesn't work, check the install location, usually /usr/local/go, is on your PATH.
Sign one of the contributor license agreements below.
Clone the repo: git clone https://github.com/googleapis/google-cloud-go
Change into the checked out source: cd google-cloud-go
Fork the repo.
Set your fork as a remote: git remote add fork git@github.com:GITHUB_USERNAME/google-cloud-go.git
Make changes, commit to your fork.

Commit messages should follow the Conventional Commits Style. The scope portion should always be filled with the name of the package affected by the changes being made. For example:
```
feat(functions): add gophers codelab
```
Send a pull request with your changes.

To minimize friction, consider setting Allow edits from maintainers on the PR, which will enable project committers and automation to update your PR.
A maintainer will review the pull request and make comments.

Prefer adding additional commits over amending and force-pushing since it can be difficult to follow code reviews when the commit history changes.

Commits will be squashed when they're merged.

Policy on new dependencies

While the Go ecosystem is rich with useful modules, in this project we try to minimize the number of direct dependencies we have on modules that are not Google-owned.

Adding new third party dependencies can have the following effects:

broadens the vulnerability surface
increases so called "vanity" import routing infrastructure failure points
increases complexity of our own third_party imports

So if you are contributing, please either contribute the full implementation directly, or find a Google-owned project that provides the functionality. Of course, there may be exceptions to this rule, but those should be well defined and agreed upon by the maintainers ahead of time.

Testing

We test code against two versions of Go, the minimum and maximum versions supported by our clients. To see which versions these are checkout our README.

Integration Tests

In addition to the unit tests, you may run the integration test suite. These directions describe setting up your environment to run integration tests for all packages: note that many of these instructions may be redundant if you intend only to run integration tests on a single package.

GCP Setup

To run the integrations tests, creation and configuration of three projects in the Google Developers Console is required: one specifically for Firestore integration tests, one specifically for Bigtable integration tests, and another for all other integration tests. We'll refer to these projects as "Firestore project", "Bigtable project" and "general project".

Note: You can skip setting up Bigtable project if you do not plan working on or running a few Bigtable tests that require a secondary project

After creating each project, you must create a service account for each project. Ensure the project-level Owner IAM role role is added to each service account. During the creation of the service account, you should download the JSON credential file for use later.

Next, ensure the following APIs are enabled in the general project:

BigQuery API
BigQuery Data Transfer API
Cloud Dataproc API
Cloud Dataproc Control API Private
Cloud Datastore API
Cloud Firestore API
Cloud Key Management Service (KMS) API
Cloud Natural Language API
Cloud OS Login API
Cloud Pub/Sub API
Cloud Resource Manager API
Cloud Spanner API
Cloud Speech API
Cloud Translation API
Cloud Video Intelligence API
Cloud Vision API
Compute Engine API
Compute Engine Instance Group Manager API
Container Registry API
Firebase Rules API
Google Cloud APIs
Google Cloud Deployment Manager V2 API
Google Cloud SQL
Google Cloud Storage
Google Cloud Storage JSON API
Google Compute Engine Instance Group Updater API
Google Compute Engine Instance Groups API
Kubernetes Engine API
Cloud Error Reporting API
Pub/Sub Lite API

Next, create a Datastore database in the general project, and a Firestore database in the Firestore project.

Finally, in the general project, create an API key for the translate API:

Go to GCP Developer Console.
Navigate to APIs & Services > Credentials.
Click Create Credentials > API Key.
Save this key for use in GCLOUD_TESTS_API_KEY as described below.

Local Setup

Once the three projects are created and configured, set the following environment variables:

GCLOUD_TESTS_GOLANG_PROJECT_ID: Developers Console project's ID (e.g. bamboo-shift-455) for the general project.
GCLOUD_TESTS_GOLANG_KEY: The path to the JSON key file of the general project's service account.
GCLOUD_TESTS_GOLANG_DATASTORE_DATABASES: Comma separated list of developer's Datastore databases. If not provided, default database i.e. empty string is used.
GCLOUD_TESTS_GOLANG_FIRESTORE_PROJECT_ID: Developers Console project's ID (e.g. doorway-cliff-677) for the Firestore project.
GCLOUD_TESTS_GOLANG_FIRESTORE_DATABASES: Comma separated list of developer's Firestore databases. If not provided, default database is used.
GCLOUD_TESTS_GOLANG_FIRESTORE_KEY: The path to the JSON key file of the Firestore project's service account.
GCLOUD_TESTS_API_KEY: API key for using the Translate API created above.
GCLOUD_TESTS_GOLANG_SECONDARY_BIGTABLE_PROJECT_ID: Developers Console project's ID (e.g. doorway-cliff-677) for Bigtable optional secondary project. This can be same as Firestore project or any project other than the general project.
GCLOUD_TESTS_BIGTABLE_CLUSTER: Cluster ID of Bigtable cluster in general project.
GCLOUD_TESTS_BIGTABLE_PRI_PROJ_SEC_CLUSTER: Optional. Cluster ID of Bigtable secondary cluster in general project
TEST_UNIVERSE_DOMAIN: Optional. Universe domain to test universe domain functionality against.
TEST_UNIVERSE_PROJECT_ID: Optional. Project ID within the universe domain for testing.
TEST_UNIVERSE_LOCATION: Optional. Available location within the universe domain.
TEST_UNIVERSE_DOMAIN_CREDENTIAL: Optional. The path to the JSON key file of the universe domain's service account.

As part of the setup that follows, the following variables will be configured:

GCLOUD_TESTS_GOLANG_KEYRING: The full name of the keyring for the tests, in the form "projects/P/locations/L/keyRings/R". The creation of this is described below.
GCLOUD_TESTS_BIGTABLE_KEYRING: The full name of the keyring for the bigtable tests, in the form "projects/P/locations/L/keyRings/R". The creation of this is described below. Expected to be single region.
GCLOUD_TESTS_GOLANG_ZONE: Compute Engine zone.

Install the gcloud command-line tool to your machine and use it to create some resources used in integration tests.

From the project's root directory:

# Sets the default project in your env.
$ gcloud config set project $GCLOUD_TESTS_GOLANG_PROJECT_ID

# Authenticates the gcloud tool with your account.
$ gcloud auth login

# Create the indexes for all the databases you want to use in the datastore integration tests. 
# Use empty string as databaseID or skip database flag for default database.
$ gcloud alpha datastore indexes create --database=your-databaseID-1 --project=$GCLOUD_TESTS_GOLANG_PROJECT_ID testdata/index.yaml

# Creates a Google Cloud storage bucket with the same name as your test project,
# and with the Cloud Logging service account as owner, for the sink
# integration tests in logging.
$ gsutil mb gs://$GCLOUD_TESTS_GOLANG_PROJECT_ID
$ gsutil acl ch -g cloud-logs@google.com:O gs://$GCLOUD_TESTS_GOLANG_PROJECT_ID

# Creates a PubSub topic for integration tests of storage notifications.
$ gcloud beta pubsub topics create go-storage-notification-test
# Next, go to the Pub/Sub dashboard in GCP console. Authorize the user
# "service-<numeric project id>@gs-project-accounts.iam.gserviceaccount.com"
# as a publisher to that topic.

# Creates a Spanner instance for the spanner integration tests.
$ gcloud beta spanner instances create go-integration-test --config regional-us-central1 --nodes 10 --description 'Instance for go client test'
# NOTE: Spanner instances are priced by the node-hour, so you may want to
# delete the instance after testing with 'gcloud beta spanner instances delete'.

$ export MY_KEYRING=some-keyring-name
$ export MY_LOCATION=global
$ export MY_SINGLE_LOCATION=us-central1
# Creates a KMS keyring, in the same location as the default location for your
# project's buckets.
$ gcloud kms keyrings create $MY_KEYRING --location $MY_LOCATION
# Creates two keys in the keyring, named key1 and key2.
$ gcloud kms keys create key1 --keyring $MY_KEYRING --location $MY_LOCATION --purpose encryption
$ gcloud kms keys create key2 --keyring $MY_KEYRING --location $MY_LOCATION --purpose encryption
# Sets the GCLOUD_TESTS_GOLANG_KEYRING environment variable.
$ export GCLOUD_TESTS_GOLANG_KEYRING=projects/$GCLOUD_TESTS_GOLANG_PROJECT_ID/locations/$MY_LOCATION/keyRings/$MY_KEYRING
# Authorizes Google Cloud Storage to encrypt and decrypt using key1.
$ gsutil kms authorize -p $GCLOUD_TESTS_GOLANG_PROJECT_ID -k $GCLOUD_TESTS_GOLANG_KEYRING/cryptoKeys/key1

# Create KMS Key in one region for Bigtable
$ gcloud kms keyrings create $MY_KEYRING --location $MY_SINGLE_LOCATION
$ gcloud kms keys create key1 --keyring $MY_KEYRING --location $MY_SINGLE_LOCATION --purpose encryption
# Sets the GCLOUD_TESTS_BIGTABLE_KEYRING environment variable.
$ export GCLOUD_TESTS_BIGTABLE_KEYRING=projects/$GCLOUD_TESTS_GOLANG_PROJECT_ID/locations/$MY_SINGLE_LOCATION/keyRings/$MY_KEYRING
# Create a service agent, https://cloud.google.com/bigtable/docs/use-cmek#gcloud:
$ gcloud beta services identity create \
    --service=bigtableadmin.googleapis.com \
    --project $GCLOUD_TESTS_GOLANG_PROJECT_ID
# Note the service agent email for the agent created.
$ export SERVICE_AGENT_EMAIL=<service agent email, from last step>

# Authorizes Google Cloud Bigtable to encrypt and decrypt using key1
$ gcloud kms keys add-iam-policy-binding key1 \
    --keyring $MY_KEYRING \
    --location $MY_SINGLE_LOCATION \
    --role roles/cloudkms.cryptoKeyEncrypterDecrypter \
    --member "serviceAccount:$SERVICE_AGENT_EMAIL" \
    --project $GCLOUD_TESTS_GOLANG_PROJECT_ID

It may be useful to add exports to your shell initialization for future use. For instance, in .zshrc:

#### START GO SDK Test Variables
# Developers Console project's ID (e.g. bamboo-shift-455) for the general project.
export GCLOUD_TESTS_GOLANG_PROJECT_ID=your-project

# Developers Console project's ID (e.g. bamboo-shift-455) for the Bigtable project.
export GCLOUD_TESTS_GOLANG_SECONDARY_BIGTABLE_PROJECT_ID=your-bigtable-optional-secondary-project

# The path to the JSON key file of the general project's service account.
export GCLOUD_TESTS_GOLANG_KEY=~/directory/your-project-abcd1234.json

# Comma separated list of developer's Datastore databases. If not provided, 
# default database i.e. empty string is used.
export GCLOUD_TESTS_GOLANG_DATASTORE_DATABASES=your-database-1,your-database-2

# Developers Console project's ID (e.g. doorway-cliff-677) for the Firestore project.
export GCLOUD_TESTS_GOLANG_FIRESTORE_PROJECT_ID=your-firestore-project

# Comma separated list of developer's Firestore databases. If not provided, default database is used.
export GCLOUD_TESTS_GOLANG_FIRESTORE_DATABASES=your-database-1,your-database-2

# The path to the JSON key file of the Firestore project's service account.
export GCLOUD_TESTS_GOLANG_FIRESTORE_KEY=~/directory/your-firestore-project-abcd1234.json

# The full name of the keyring for the tests, in the form "projects/P/locations/L/keyRings/R".
# The creation of this is described below.
export MY_KEYRING=my-golang-sdk-test
export MY_LOCATION=global
export GCLOUD_TESTS_GOLANG_KEYRING=projects/$GCLOUD_TESTS_GOLANG_PROJECT_ID/locations/$MY_LOCATION/keyRings/$MY_KEYRING

# API key for using the Translate API.
export GCLOUD_TESTS_API_KEY=abcdefghijk123456789

# Compute Engine zone. (https://cloud.google.com/compute/docs/regions-zones)
export GCLOUD_TESTS_GOLANG_ZONE=your-chosen-region
#### END GO SDK Test Variables

Running

Once you've done the necessary setup, you can run the integration tests by running:

$ go test -v ./...

Note that the above command will not run the tests in other modules. To run tests on other modules, first navigate to the appropriate subdirectory. For instance, to run only the tests for datastore:

$ cd datastore
$ go test -v ./...

Replay

Some packages can record the RPCs during integration tests to a file for subsequent replay. To record, pass the -record flag to go test. The recording will be saved to the package.replay file. To replay integration tests from a saved recording, the replay file must be present, the -short flag must be passed to go test, and the GCLOUD_TESTS_GOLANG_ENABLE_REPLAY environment variable must have a non-empty value.

Contributor License Agreements

Before we can accept your pull requests you'll need to sign a Contributor License Agreement (CLA):

If you are an individual writing original source code and you own the intellectual property, then you'll need to sign an individual CLA.
If you work for a company that wants to allow you to contribute your work, then you'll need to sign a corporate CLA.

You can sign these electronically (just scroll to the bottom). After that, we'll be able to accept your pull requests.

Contributor Code of Conduct

As contributors and maintainers of this project, and in the interest of fostering an open and welcoming community, we pledge to respect all people who contribute through reporting issues, posting feature requests, updating documentation, submitting pull requests or patches, and other activities.

We are committed to making participation in this project a harassment-free experience for everyone, regardless of level of experience, gender, gender identity and expression, sexual orientation, disability, personal appearance, body size, race, ethnicity, age, religion, or nationality.

Examples of unacceptable behavior by participants include:

The use of sexualized language or imagery
Personal attacks
Trolling or insulting/derogatory comments
Public or private harassment
Publishing other's private information, such as physical or electronic addresses, without explicit permission
Other unethical or unprofessional conduct.

Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct. By adopting this Code of Conduct, project maintainers commit themselves to fairly and consistently applying these principles to every aspect of managing this project. Project maintainers who do not follow or enforce the Code of Conduct may be permanently removed from the project team.

This code of conduct applies both within project spaces and in public spaces when an individual is representing the project or its community.

Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by opening an issue or contacting one or more of the project maintainers.

This Code of Conduct is adapted from the Contributor Covenant, version 1.2.0, available at https://contributor-covenant.org/version/1/2/0/

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