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Official Go implementation of the Ethereum protocol
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go-ethereum/build/ci-notes.md

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Vendored Dependencies

Dependencies are almost all vendored in at the standard Go /vendor path. This allows people to build go-ethereum using the standard toolchain without any particular package manager. It also plays nicely with go get, not requiring external code to be relied on.

The one single dependent package missing from vendor is golang.org/x/net/context. As this is a package exposed via public library APIs, it must not be vendored as dependent code woulnd't be able to instantiate.

To allow reproducible builds of go-ethereum nonetheless that don't need network access during build time to fetch golang.org/x/net/context, a version was copied into our repo at the very specific /build/_vendor path, which is added automatically by all CI build scripts and the makefile too.

Debian Packaging

Tagged releases and develop branch commits are available as installable Debian packages for Ubuntu. Packages are built for the all Ubuntu versions which are supported by Canonical:

  • Trusty Tahr (14.04 LTS)
  • Wily Werewolf (15.10)
  • Xenial Xerus (16.04 LTS)
  • Yakkety Yak (16.10)

Packages of develop branch commits have suffix -unstable and cannot be installed alongside the stable version. Switching between release streams requires user intervention.

The packages are built and served by launchpad.net. We generate a Debian source package for each distribution and upload it. Their builder picks up the source package, builds it and installs the new version into the PPA repository. Launchpad requires a valid signature by a team member for source package uploads. The signing key is stored in an environment variable which Travis CI makes available to certain builds.

We want to build go-ethereum with the most recent version of Go, irrespective of the Go version that is available in the main Ubuntu repository. In order to make this possible, our PPA depends on the ~gophers/ubuntu/archive PPA. Our source package build-depends on golang-1.7, which is co-installable alongside the regular golang package. PPA dependencies can be edited at https://launchpad.net/%7Eethereum/+archive/ubuntu/ethereum/+edit-dependencies

Building Packages Locally (for testing)

You need to run Ubuntu to do test packaging.

Add the gophers PPA and install Go 1.7 and Debian packaging tools:

$ sudo apt-add-repository ppa:gophers/ubuntu/archive
$ sudo apt-get update
$ sudo apt-get install build-essential golang-1.7 devscripts debhelper

Create the source packages:

$ go run build/ci.go debsrc -workdir dist

Then go into the source package directory for your running distribution and build the package:

$ cd dist/ethereum-unstable-1.5.0+xenial
$ dpkg-buildpackage

Built packages are placed in the dist/ directory.

$ cd ..
$ dpkg-deb -c geth-unstable_1.5.0+xenial_amd64.deb