path: root/build/ci.go

// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

// +build none

/*
The ci command is called from Continuous Integration scripts.

Usage: go run ci.go <command> <command flags/arguments>

Available commands are:

   install    [-arch architecture] [ packages... ]                                           -- builds packages and executables
   test       [ -coverage ] [ -vet ] [ packages... ]                                         -- runs the tests
   archive    [-arch architecture] [ -type zip|tar ] [ -signer key-envvar ] [ -upload dest ] -- archives build artefacts
   importkeys                                                                                -- imports signing keys from env
   debsrc     [ -signer key-id ] [ -upload dest ]                                            -- creates a debian source package
   xgo        [ options ]                                                                    -- cross builds according to options

For all commands, -n prevents execution of external programs (dry run mode).

*/
package main

import (
    "bytes"
    "encoding/base64"
    "flag"
    "fmt"
    "go/parser"
    "go/token"
    "io/ioutil"
    "log"
    "os"
    "os/exec"
    "path/filepath"
    "runtime"
    "strings"
    "time"

    "github.com/ethereum/go-ethereum/internal/build"
)

var (
    // Files that end up in the geth*.zip archive.
    gethArchiveFiles = []string{
        "COPYING",
        executablePath("geth"),
    }

    // Files that end up in the geth-alltools*.zip archive.
    allToolsArchiveFiles = []string{
        "COPYING",
        executablePath("abigen"),
        executablePath("evm"),
        executablePath("geth"),
        executablePath("rlpdump"),
    }

    // A debian package is created for all executables listed here.
    debExecutables = []debExecutable{
        {
            Name:        "geth",
            Description: "Ethereum CLI client.",
        },
        {
            Name:        "rlpdump",
            Description: "Developer utility tool that prints RLP structures.",
        },
        {
            Name:        "evm",
            Description: "Developer utility version of the EVM (Ethereum Virtual Machine) that is capable of running bytecode snippets within a configurable environment and execution mode.",
        },
        {
            Name:        "abigen",
            Description: "Source code generator to convert Ethereum contract definitions into easy to use, compile-time type-safe Go packages.",
        },
    }

    // Distros for which packages are created.
    // Note: vivid is unsupported because there is no golang-1.6 package for it.
    debDistros = []string{"trusty", "wily", "xenial", "yakkety"}
)

var GOBIN, _ = filepath.Abs(filepath.Join("build", "bin"))

func executablePath(name string) string {
    if runtime.GOOS == "windows" {
        name += ".exe"
    }
    return filepath.Join(GOBIN, name)
}

func main() {
    log.SetFlags(log.Lshortfile)

    if _, err := os.Stat(filepath.Join("build", "ci.go")); os.IsNotExist(err) {
        log.Fatal("this script must be run from the root of the repository")
    }
    if len(os.Args) < 2 {
        log.Fatal("need subcommand as first argument")
    }
    switch os.Args[1] {
    case "install":
        doInstall(os.Args[2:])
    case "test":
        doTest(os.Args[2:])
    case "archive":
        doArchive(os.Args[2:])
    case "debsrc":
        doDebianSource(os.Args[2:])
    case "xgo":
        doXgo(os.Args[2:])
    default:
        log.Fatal("unknown command ", os.Args[1])
    }
}

// Compiling

func doInstall(cmdline []string) {
    var (
        arch = flag.String("arch", "", "Architecture to cross build for")
    )
    flag.CommandLine.Parse(cmdline)
    env := build.Env()

    // Check Go version. People regularly open issues about compilation
    // failure with outdated Go. This should save them the trouble.
    if runtime.Version() < "go1.4" && !strings.HasPrefix(runtime.Version(), "devel") {
        log.Println("You have Go version", runtime.Version())
        log.Println("go-ethereum requires at least Go version 1.4 and cannot")
        log.Println("be compiled with an earlier version. Please upgrade your Go installation.")
        os.Exit(1)
    }
    // Compile packages given as arguments, or everything if there are no arguments.
    packages := []string{"./..."}
    if flag.NArg() > 0 {
        packages = flag.Args()
    }
    if *arch == "" || *arch == runtime.GOARCH {
        goinstall := goTool("install", buildFlags(env)...)
        goinstall.Args = append(goinstall.Args, "-v")
        goinstall.Args = append(goinstall.Args, packages...)
        build.MustRun(goinstall)
        return
    }
    // Seems we are cross compiling, work around forbidden GOBIN
    goinstall := goToolArch(*arch, "install", buildFlags(env)...)
    goinstall.Args = append(goinstall.Args, "-v")
    goinstall.Args = append(goinstall.Args, []string{"-buildmode", "archive"}...)
    goinstall.Args = append(goinstall.Args, packages...)
    build.MustRun(goinstall)

    if cmds, err := ioutil.ReadDir("cmd"); err == nil {
        for _, cmd := range cmds {
            pkgs, err := parser.ParseDir(token.NewFileSet(), filepath.Join(".", "cmd", cmd.Name()), nil, parser.PackageClauseOnly)
            if err != nil {
                log.Fatal(err)
            }
            for name, _ := range pkgs {
                if name == "main" {
                    gobuild := goToolArch(*arch, "build", buildFlags(env)...)
                    gobuild.Args = append(gobuild.Args, "-v")
                    gobuild.Args = append(gobuild.Args, []string{"-o", filepath.Join(GOBIN, cmd.Name())}...)
                    gobuild.Args = append(gobuild.Args, "."+string(filepath.Separator)+filepath.Join("cmd", cmd.Name()))
                    build.MustRun(gobuild)
                    break
                }
            }
        }
    }
}

func buildFlags(env build.Environment) (flags []string) {
    if os.Getenv("GO_OPENCL") != "" {
        flags = append(flags, "-tags", "opencl")
    }

    // Since Go 1.5, the separator char for link time assignments
    // is '=' and using ' ' prints a warning. However, Go < 1.5 does
    // not support using '='.
    sep := " "
    if runtime.Version() > "go1.5" || strings.Contains(runtime.Version(), "devel") {
        sep = "="
    }
    // Set gitCommit constant via link-time assignment.
    if env.Commit != "" {
        flags = append(flags, "-ldflags", "-X main.gitCommit"+sep+env.Commit)
    }
    return flags
}

func goTool(subcmd string, args ...string) *exec.Cmd {
    return goToolArch(runtime.GOARCH, subcmd, args...)
}

func goToolArch(arch string, subcmd string, args ...string) *exec.Cmd {
    gocmd := filepath.Join(runtime.GOROOT(), "bin", "go")
    cmd := exec.Command(gocmd, subcmd)
    cmd.Args = append(cmd.Args, args...)
    cmd.Env = []string{
        "GO15VENDOREXPERIMENT=1",
        "GOPATH=" + build.GOPATH(),
    }
    if arch == "" || arch == runtime.GOARCH {
        cmd.Env = append(cmd.Env, "GOBIN="+GOBIN)
    } else {
        cmd.Env = append(cmd.Env, "CGO_ENABLED=1")
        cmd.Env = append(cmd.Env, "GOARCH="+arch)
    }
    for _, e := range os.Environ() {
        if strings.HasPrefix(e, "GOPATH=") || strings.HasPrefix(e, "GOBIN=") {
            continue
        }
        cmd.Env = append(cmd.Env, e)
    }
    return cmd
}

// Running The Tests
//
// "tests" also includes static analysis tools such as vet.

func doTest(cmdline []string) {
    var (
        vet      = flag.Bool("vet", false, "Whether to run go vet")
        coverage = flag.Bool("coverage", false, "Whether to record code coverage")
    )
    flag.CommandLine.Parse(cmdline)

    packages := []string{"./..."}
    if len(flag.CommandLine.Args()) > 0 {
        packages = flag.CommandLine.Args()
    }
    if len(packages) == 1 && packages[0] == "./..." {
        // Resolve ./... manually since go vet will fail on vendored stuff
        out, err := goTool("list", "./...").CombinedOutput()
        if err != nil {
            log.Fatalf("package listing failed: %v\n%s", err, string(out))
        }
        packages = []string{}
        for _, line := range strings.Split(string(out), "\n") {
            if !strings.Contains(line, "vendor") {
                packages = append(packages, strings.TrimSpace(line))
            }
        }
    }
    // Run analysis tools before the tests.
    if *vet {
        build.MustRun(goTool("vet", packages...))
    }

    // Run the actual tests.
    gotest := goTool("test")
    // Test a single package at a time. CI builders are slow
    // and some tests run into timeouts under load.
    gotest.Args = append(gotest.Args, "-p", "1")
    if *coverage {
        gotest.Args = append(gotest.Args, "-covermode=atomic", "-cover")
    }
    gotest.Args = append(gotest.Args, packages...)
    build.MustRun(gotest)
}

// Release Packaging

func doArchive(cmdline []string) {
    var (
        arch   = flag.String("arch", runtime.GOARCH, "Architecture cross packaging")
        atype  = flag.String("type", "zip", "Type of archive to write (zip|tar)")
        signer = flag.String("signer", "", `Environment variable holding the signing key (e.g. LINUX_SIGNING_KEY)`)
        upload = flag.String("upload", "", `Destination to upload the archives (usually "gethstore/builds")`)
        ext    string
    )
    flag.CommandLine.Parse(cmdline)
    switch *atype {
    case "zip":
        ext = ".zip"
    case "tar":
        ext = ".tar.gz"
    default:
        log.Fatal("unknown archive type: ", atype)
    }

    var (
        env      = build.Env()
        base     = archiveBasename(*arch, env)
        geth     = "geth-" + base + ext
        alltools = "geth-alltools-" + base + ext
    )
    maybeSkipArchive(env)
    if err := build.WriteArchive(geth, gethArchiveFiles); err != nil {
        log.Fatal(err)
    }
    if err := build.WriteArchive(alltools, allToolsArchiveFiles); err != nil {
        log.Fatal(err)
    }
    for _, archive := range []string{geth, alltools} {
        if err := archiveUpload(archive, *upload, *signer); err != nil {
            log.Fatal(err)
        }
    }
}

func archiveBasename(arch string, env build.Environment) string {
    platform := runtime.GOOS + "-" + arch
    archive := platform + "-" + build.VERSION()
    if isUnstableBuild(env) {
        archive += "-unstable"
    }
    if env.Commit != "" {
        archive += "-" + env.Commit[:8]
    }
    return archive
}

func archiveUpload(archive string, blobstore string, signer string) error {
    // If signing was requested, generate the signature files
    if signer != "" {
        pgpkey, err := base64.StdEncoding.DecodeString(os.Getenv(signer))
        if err != nil {
            return fmt.Errorf("invalid base64 %s", signer)
        }
        if err := build.PGPSignFile(archive, archive+".asc", string(pgpkey)); err != nil {
            return err
        }
    }
    // If uploading to Azure was requested, push the archive possibly with its signature
    if blobstore != "" {
        auth := build.AzureBlobstoreConfig{
            Account:   strings.Split(blobstore, "/")[0],
            Token:     os.Getenv("AZURE_BLOBSTORE_TOKEN"),
            Container: strings.SplitN(blobstore, "/", 2)[1],
        }
        if err := build.AzureBlobstoreUpload(archive, archive, auth); err != nil {
            return err
        }
        if signer != "" {
            if err := build.AzureBlobstoreUpload(archive+".asc", archive+".asc", auth); err != nil {
                return err
            }
        }
    }
    return nil
}

// skips archiving for some build configurations.
func maybeSkipArchive(env build.Environment) {
    if env.IsPullRequest {
        log.Printf("skipping because this is a PR build")
        os.Exit(0)
    }
    if env.Branch != "develop" && !strings.HasPrefix(env.Tag, "v1.") {
        log.Printf("skipping because branch %q, tag %q is not on the whitelist", env.Branch, env.Tag)
        os.Exit(0)
    }
}

// Debian Packaging

func doDebianSource(cmdline []string) {
    var (
        signer  = flag.String("signer", "", `Signing key name, also used as package author`)
        upload  = flag.String("upload", "", `Where to upload the source package (usually "ppa:ethereum/ethereum")`)
        workdir = flag.String("workdir", "", `Output directory for packages (uses temp dir if unset)`)
        now     = time.Now()
    )
    flag.CommandLine.Parse(cmdline)
    *workdir = makeWorkdir(*workdir)
    env := build.Env()
    maybeSkipArchive(env)

    // Import the signing key.
    if b64key := os.Getenv("PPA_SIGNING_KEY"); b64key != "" {
        key, err := base64.StdEncoding.DecodeString(b64key)
        if err != nil {
            log.Fatal("invalid base64 PPA_SIGNING_KEY")
        }
        gpg := exec.Command("gpg", "--import")
        gpg.Stdin = bytes.NewReader(key)
        build.MustRun(gpg)
    }

    // Create the packages.
    for _, distro := range debDistros {
        meta := newDebMetadata(distro, *signer, env, now)
        pkgdir := stageDebianSource(*workdir, meta)
        debuild := exec.Command("debuild", "-S", "-sa", "-us", "-uc")
        debuild.Dir = pkgdir
        build.MustRun(debuild)

        changes := fmt.Sprintf("%s_%s_source.changes", meta.Name(), meta.VersionString())
        changes = filepath.Join(*workdir, changes)
        if *signer != "" {
            build.MustRunCommand("debsign", changes)
        }
        if *upload != "" {
            build.MustRunCommand("dput", *upload, changes)
        }
    }
}

func makeWorkdir(wdflag string) string {
    var err error
    if wdflag != "" {
        err = os.MkdirAll(wdflag, 0744)
    } else {
        wdflag, err = ioutil.TempDir("", "eth-deb-build-")
    }
    if err != nil {
        log.Fatal(err)
    }
    return wdflag
}

func isUnstableBuild(env build.Environment) bool {
    if env.Branch != "develop" && env.Tag != "" {
        return false
    }
    return true
}

type debMetadata struct {
    Env build.Environment

    // go-ethereum version being built. Note that this
    // is not the debian package version. The package version
    // is constructed by VersionString.
    Version string

    Author       string // "name <email>", also selects signing key
    Distro, Time string
    Executables  []debExecutable
}

type debExecutable struct {
    Name, Description string
}

func newDebMetadata(distro, author string, env build.Environment, t time.Time) debMetadata {
    if author == "" {
        // No signing key, use default author.
        author = "Ethereum Builds <fjl@ethereum.org>"
    }
    return debMetadata{
        Env:         env,
        Author:      author,
        Distro:      distro,
        Version:     build.VERSION(),
        Time:        t.Format(time.RFC1123Z),
        Executables: debExecutables,
    }
}

// Name returns the name of the metapackage that depends
// on all executable packages.
func (meta debMetadata) Name() string {
    if isUnstableBuild(meta.Env) {
        return "ethereum-unstable"
    }
    return "ethereum"
}

// VersionString returns the debian version of the packages.
func (meta debMetadata) VersionString() string {
    vsn := meta.Version
    if meta.Env.Buildnum != "" {
        vsn += "+build" + meta.Env.Buildnum
    }
    if meta.Distro != "" {
        vsn += "+" + meta.Distro
    }
    return vsn
}

// ExeList returns the list of all executable packages.
func (meta debMetadata) ExeList() string {
    names := make([]string, len(meta.Executables))
    for i, e := range meta.Executables {
        names[i] = meta.ExeName(e)
    }
    return strings.Join(names, ", ")
}

// ExeName returns the package name of an executable package.
func (meta debMetadata) ExeName(exe debExecutable) string {
    if isUnstableBuild(meta.Env) {
        return exe.Name + "-unstable"
    }
    return exe.Name
}

// ExeConflicts returns the content of the Conflicts field
// for executable packages.
func (meta debMetadata) ExeConflicts(exe debExecutable) string {
    if isUnstableBuild(meta.Env) {
        // Set up the conflicts list so that the *-unstable packages
        // cannot be installed alongside the regular version.
        //
        // https://www.debian.org/doc/debian-policy/ch-relationships.html
        // is very explicit about Conflicts: and says that Breaks: should
        // be preferred and the conflicting files should be handled via
        // alternates. We might do this eventually but using a conflict is
        // easier now.
        return "ethereum, " + exe.Name
    }
    return ""
}

func stageDebianSource(tmpdir string, meta debMetadata) (pkgdir string) {
    pkg := meta.Name() + "-" + meta.VersionString()
    pkgdir = filepath.Join(tmpdir, pkg)
    if err := os.Mkdir(pkgdir, 0755); err != nil {
        log.Fatal(err)
    }

    // Copy the source code.
    build.MustRunCommand("git", "checkout-index", "-a", "--prefix", pkgdir+string(filepath.Separator))

    // Put the debian build files in place.
    debian := filepath.Join(pkgdir, "debian")
    build.Render("build/deb.rules", filepath.Join(debian, "rules"), 0755, meta)
    build.Render("build/deb.changelog", filepath.Join(debian, "changelog"), 0644, meta)
    build.Render("build/deb.control", filepath.Join(debian, "control"), 0644, meta)
    build.Render("build/deb.copyright", filepath.Join(debian, "copyright"), 0644, meta)
    build.RenderString("8\n", filepath.Join(debian, "compat"), 0644, meta)
    build.RenderString("3.0 (native)\n", filepath.Join(debian, "source/format"), 0644, meta)
    for _, exe := range meta.Executables {
        install := filepath.Join(debian, meta.ExeName(exe)+".install")
        docs := filepath.Join(debian, meta.ExeName(exe)+".docs")
        build.Render("build/deb.install", install, 0644, exe)
        build.Render("build/deb.docs", docs, 0644, exe)
    }

    return pkgdir
}

// Cross compilation

func doXgo(cmdline []string) {
    flag.CommandLine.Parse(cmdline)
    env := build.Env()

    // Make sure xgo is available for cross compilation
    gogetxgo := goTool("get", "github.com/karalabe/xgo")
    build.MustRun(gogetxgo)

    // Execute the actual cross compilation
    xgo := xgoTool(append(buildFlags(env), flag.Args()...))
    build.MustRun(xgo)
}

func xgoTool(args []string) *exec.Cmd {
    cmd := exec.Command(filepath.Join(GOBIN, "xgo"), args...)
    cmd.Env = []string{
        "GOPATH=" + build.GOPATH(),
        "GOBIN=" + GOBIN,
    }
    for _, e := range os.Environ() {
        if strings.HasPrefix(e, "GOPATH=") || strings.HasPrefix(e, "GOBIN=") {
            continue
        }
        cmd.Env = append(cmd.Env, e)
    }
    return cmd
}