Google Cloud Ruby Client

Idiomatic Ruby client for Google Cloud Platform services.

• Homepage
• API documentation
• google-cloud on RubyGems

This client supports the following Google Cloud Platform services at a Beta quality level:

• BigQuery (Beta)
• Cloud Datastore (Beta)
• Stackdriver Logging (Beta)
• Cloud Storage (Beta)

This client supports the following Google Cloud Platform services at an Alpha quality level:

• Cloud DNS (Alpha)
• Cloud Natural Language API (Alpha)
• Cloud Pub/Sub (Alpha)
• Cloud Resource Manager (Alpha)
• Cloud Speech API (Alpha)
• Cloud Translation API (Alpha)
• Cloud Vision API (Alpha)

The support for each service is distributed as a separate gem. However, for your convenience, the google-cloud gem lets you install the entire collection.

If you need support for other Google APIs, check out the Google API Ruby Client library.

Quick Start

$ gem install google-cloud

The google-cloud gem shown above provides all of the individual service gems in the google-cloud-ruby project, making it easy to explore Google Cloud Platform. To avoid unnecessary dependencies, you can also install the service gems independently.

Authentication

In general, the google-cloud-ruby library uses Service Account credentials to connect to Google Cloud services. When running on Compute Engine the credentials will be discovered automatically. When running on other environments, the Service Account credentials can be specified by providing the path to the JSON keyfile for the account (or the JSON itself) in environment variables. Additionally, Cloud SDK credentials can also be discovered automatically, but this is only recommended during development.

General instructions, environment variables, and configuration options are covered in the general Authentication guide for the google-cloud umbrella package. Specific instructions and environment variables for each individual service are linked from the README documents listed below for each service.

The preview examples below demonstrate how to provide the Project ID and Credentials JSON file path directly in code.

BigQuery (Beta)

• google-cloud-bigquery README
• google-cloud-bigquery API documentation
• google-cloud-bigquery on RubyGems
• Google BigQuery documentation

Quick Start

$ gem install google-cloud-bigquery

Preview

require "google/cloud/bigquery"

bigquery = Google::Cloud::Bigquery.new(
  project: "my-todo-project",
  keyfile: "/path/to/keyfile.json"
)

# Create a new table to archive todos
dataset = bigquery.dataset "my-todo-archive"
table = dataset.create_table "todos",
          name: "Todos Archive",
          description: "Archive for completed TODO records"

# Load data into the table
file = File.open "/archive/todos/completed-todos.csv"
load_job = table.load file

# Run a query for the number of completed todos by owner
count_sql = "SELECT owner, COUNT(*) AS complete_count FROM todos GROUP BY owner"
data = bigquery.query count_sql
data.each do |row|
  puts row["name"]
end

Cloud Datastore (Beta)

• google-cloud-datastore README
• google-cloud-datastore API documentation
• google-cloud-datastore on RubyGems
• Google Cloud Datastore documentation

Follow the activation instructions to use the Google Cloud Datastore API with your project.

Quick Start

$ gem install google-cloud-datastore

Preview

require "google/cloud/datastore"

datastore = Google::Cloud::Datastore.new(
  project: "my-todo-project",
  keyfile: "/path/to/keyfile.json"
)

# Create a new task to demo datastore
task = datastore.entity "Task", "sampleTask" do |t|
  t["type"] = "Personal"
  t["done"] = false
  t["priority"] = 4
  t["description"] = "Learn Cloud Datastore"
end

# Save the new task
datastore.save task

# Run a query for all completed tasks
query = datastore.query("Task").
  where("done", "=", false)
tasks = datastore.run query

Cloud DNS (Alpha)

• google-cloud-dns README
• google-cloud-dns API documentation
• google-cloud-dns on RubyGems
• Google Cloud DNS documentation

Quick Start

$ gem install google-cloud-dns

Preview

require "google/cloud/dns"

dns = Google::Cloud::Dns.new

# Retrieve a zone
zone = dns.zone "example-com"

# Update records in the zone
change = zone.update do |tx|
  tx.add     "www", "A",  86400, "1.2.3.4"
  tx.remove  "example.com.", "TXT"
  tx.replace "example.com.", "MX", 86400, ["10 mail1.example.com.",
                                           "20 mail2.example.com."]
  tx.modify "www.example.com.", "CNAME" do |r|
    r.ttl = 86400 # only change the TTL
  end
end

Stackdriver Logging (Beta)

• google-cloud-logging README
• google-cloud-logging API documentation
• google-cloud-logging on RubyGems
• Stackdriver Logging documentation

Quick Start

$ gem install google-cloud-logging

Preview

require "google/cloud/logging"

logging = Google::Cloud::Logging.new

# List all log entries
logging.entries.each do |e|
  puts "[#{e.timestamp}] #{e.log_name} #{e.payload.inspect}"
end

# List only entries from a single log
entries = logging.entries filter: "log:syslog"

# Write a log entry
entry = logging.entry
entry.payload = "Job started."
entry.log_name = "my_app_log"
entry.resource.type = "gae_app"
entry.resource.labels[:module_id] = "1"
entry.resource.labels[:version_id] = "20150925t173233"

logging.write_entries entry

Cloud Natural Language API (Alpha)

• google-cloud-language README
• google-cloud-language API documentation
• google-cloud-language on RubyGems
• Google Cloud Natural Language API documentation

Quick Start

$ gem install google-cloud-language

Preview

require "google/cloud/language"

language = Google::Cloud::Language.new

content = "Star Wars is a great movie. The Death Star is fearsome."
document = language.document content
annotation = document.annotate

annotation.entities.count #=> 3
annotation.sentiment.score #=> 0.10000000149011612
annotation.sentiment.magnitude #=> 1.100000023841858
annotation.sentences.count #=> 2
annotation.tokens.count #=> 13

Cloud Pub/Sub (Alpha)

• google-cloud-pubsub README
• google-cloud-pubsub API documentation
• google-cloud-pubsub on RubyGems
• Google Cloud Pub/Sub documentation

Quick Start

$ gem install google-cloud-pubsub

Preview

require "google/cloud/pubsub"

pubsub = Google::Cloud::Pubsub.new(
  project: "my-todo-project",
  keyfile: "/path/to/keyfile.json"
)

# Retrieve a topic
topic = pubsub.topic "my-topic"

# Publish a new message
msg = topic.publish "new-message"

# Retrieve a subscription
sub = pubsub.subscription "my-topic-sub"

# Pull available messages
msgs = sub.pull

Cloud Resource Manager (Alpha)

• google-cloud-resource_manager README
• google-cloud-resource_manager API documentation
• google-cloud-resource_manager on RubyGems
• Google Cloud Resource Manager documentation

Quick Start

$ gem install google-cloud-resource_manager

Preview

require "google/cloud/resource_manager"

resource_manager = Google::Cloud::ResourceManager.new

# List all projects
resource_manager.projects.each do |project|
  puts projects.project_id
end

# Label a project as production
project = resource_manager.project "tokyo-rain-123"
project.update do |p|
  p.labels["env"] = "production"
end

# List only projects with the "production" label
projects = resource_manager.projects filter: "labels.env:production"

Cloud Speech API (Alpha)

• google-cloud-speech README
• google-cloud-speech API documentation
• google-cloud-speech on RubyGems
• Google Cloud Speech API documentation

Quick Start

$ gem install google-cloud-speech

Preview

require "google/cloud/speech"

speech = Google::Cloud::Speech.new

audio = speech.audio "path/to/audio.raw",
                     encoding: :raw, sample_rate: 16000
results = audio.recognize

result = results.first
result.transcript #=> "how old is the Brooklyn Bridge"
result.confidence #=> 0.9826789498329163

Cloud Storage (Beta)

• google-cloud-storage README
• google-cloud-storage API documentation
• google-cloud-storage on RubyGems
• Google Cloud Storage documentation

Quick Start

$ gem install google-cloud-storage

Preview

require "google/cloud/storage"

storage = Google::Cloud::Storage.new(
  project: "my-todo-project",
  keyfile: "/path/to/keyfile.json"
)

bucket = storage.bucket "task-attachments"

file = bucket.file "path/to/my-file.ext"

# Download the file to the local file system
file.download "/tasks/attachments/#{file.name}"

# Copy the file to a backup bucket
backup = storage.bucket "task-attachment-backups"
file.copy backup, file.name

Cloud Translation API (Alpha)

• google-cloud-translate README
• google-cloud-translate API documentation
• google-cloud-translate on RubyGems
• Google Cloud Translation API documentation

Quick Start

$ gem install google-cloud-translate

Preview

require "google/cloud/translate"

translate = Google::Cloud::Translate.new

translation = translate.translate "Hello world!", to: "la"

puts translation #=> Salve mundi!

translation.from #=> "en"
translation.origin #=> "Hello world!"
translation.to #=> "la"
translation.text #=> "Salve mundi!"

Cloud Vision API (Alpha)

• google-cloud-vision README
• google-cloud-vision API documentation
• google-cloud-vision on RubyGems
• Google Cloud Vision API documentation

Quick Start

$ gem install google-cloud-vision

Preview

require "google/cloud/vision"

vision = Google::Cloud::Vision.new

image = vision.image "path/to/landmark.jpg"

landmark = image.landmark
landmark.description #=> "Mount Rushmore"

Supported Ruby Versions

google-cloud-ruby is supported on Ruby 2.0+.

Versioning

This library follows Semantic Versioning.

Please note it is currently under active development. Any release versioned 0.x.y is subject to backwards incompatible changes at any time.

Beta: Libraries defined at a Beta quality level are expected to be mostly stable and we're working towards their release candidate. We will address issues and requests with a higher priority.

Alpha: Libraries defined at an Alpha quality level are still a work-in-progress and are more likely to get backwards-incompatible updates.

Contributing

Contributions to this library are always welcome and highly encouraged.

See CONTRIBUTING for more information on how to get started.

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms. See Code of Conduct for more information.

License

This library is licensed under Apache 2.0. Full license text is available in LICENSE.

Support

Please report bugs at the project on Github. Don't hesitate to ask questions about the client or APIs on StackOverflow.