go-fetcher

go-fetcher

This repository contains code for a go get routing service which allows packages from multiple locations to appear to be centralized in one location. This also allows the packages to be moved to other locations without breaking imports.

Development

First, be sure you install Go. Then clone the repository:

git clone https://github.com/cloudfoundry/go-fetcher.git
cd go-fetcher/

We are using Ginkgo to run tests. You may use the run_specs command:

./bin/run_specs

Some environment variables and configuration are required to run. For local testing, you may use the run_local command and point your browser to localhost:8800:

./bin/run_local

We are using counterfeiter to generate fakes. If you are changing interfaces, you can rebuild fakes with the following:

go get github.com/maxbrunsfeld/counterfeiter/v6
go generate ./...

Configuration

See the following for an example of what configuration should look like:

cat > config.json << END
{
  "ImportPrefix": "example.com",
  "OrgList": [
    "https://github.com/cloudfoundry/",
    "https://github.com/cloudfoundry-incubator/",
    "https://github.com/cloudfoundry-attic/"
  ],
  "NoRedirectAgents": [
    "Go-http-client",
    "GoDocBot"
  ],
  "Overrides": {
    "stager": "https://github.com/cloudfoundry-incubator/stager"
  }
}
END

• The value of "ImportPrefix" is the DNS name of the go-fetcher service (ex: example.com).
• The value of "OrgList" is a list of go get compatible sites that are searched in order.
• The value of "Overrides" is a dictionary of packages which should not use the normal search path.

Deploying to Cloud Foundry

Deploying to Cloud Foundry is straight forward, but requires you to do so from the checked out repository so that cf can recognize and upload the package. You will need to create a manifest.yml to accompany your config.json:

cat > manifest.yml << END
application:
  - name: example
env:
  GOPACKAGENAME: github.com/cloudfoundry/go-fetcher/cmd/go-fetcher
  GOVERSION: go1.13
  CONFIG: config.json
END

Then, login to your cf instance and push the application:

cf login ...
cf push example