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toolchain_cmd.go
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toolchain_cmd.go
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package src
import (
"errors"
"fmt"
"log"
"os"
"os/exec"
"path/filepath"
"strings"
"sync"
"github.com/aybabtme/color/brush"
"github.com/sqs/go-flags"
"sourcegraph.com/sourcegraph/srclib"
"sourcegraph.com/sourcegraph/srclib/toolchain"
)
func init() {
c, err := CLI.AddCommand("toolchain",
"manage toolchains",
"Manage srclib toolchains.",
&toolchainCmd,
)
if err != nil {
log.Fatal(err)
}
c.Aliases = []string{"tc"}
_, err = c.AddCommand("list",
"list available toolchains",
"List available toolchains.",
&toolchainListCmd,
)
if err != nil {
log.Fatal(err)
}
_, err = c.AddCommand("list-tools",
"list tools in toolchains",
"List available tools in all toolchains.",
&toolchainListToolsCmd,
)
if err != nil {
log.Fatal(err)
}
_, err = c.AddCommand("build",
"build a toolchain",
"Build a toolchain's Docker image.",
&toolchainBuildCmd,
)
if err != nil {
log.Fatal(err)
}
_, err = c.AddCommand("get",
"download a toolchain",
"Download a toolchain's repository to the SRCLIBPATH.",
&toolchainGetCmd,
)
if err != nil {
log.Fatal(err)
}
_, err = c.AddCommand("add",
"add a local toolchain",
"Add a local directory as a toolchain in SRCLIBPATH.",
&toolchainAddCmd,
)
if err != nil {
log.Fatal(err)
}
_, err = c.AddCommand("install-std",
"install standard toolchains",
"Install standard toolchains (sourcegraph.com/sourcegraph/srclib-* toolchains).",
&toolchainInstallStdCmd,
)
if err != nil {
log.Fatal(err)
}
}
type ToolchainPath string
func (t ToolchainPath) Complete(match string) []flags.Completion {
toolchains, err := toolchain.List()
if err != nil {
log.Println(err)
return nil
}
var comps []flags.Completion
for _, tc := range toolchains {
if strings.HasPrefix(tc.Path, match) {
comps = append(comps, flags.Completion{Item: tc.Path})
}
}
return comps
}
type ToolchainExecOpt struct {
ExeMethods string `short:"m" long:"methods" default:"program,docker" description:"toolchain execution methods" value-name:"METHODS"`
}
func (o *ToolchainExecOpt) ToolchainMode() toolchain.Mode {
// TODO(sqs): make this a go-flags type
methods := strings.Split(o.ExeMethods, ",")
var mode toolchain.Mode
for _, method := range methods {
if method == "program" {
mode |= toolchain.AsProgram
}
if method == "docker" {
mode |= toolchain.AsDockerContainer
}
}
return mode
}
type ToolchainCmd struct{}
var toolchainCmd ToolchainCmd
func (c *ToolchainCmd) Execute(args []string) error { return nil }
type ToolchainListCmd struct {
}
var toolchainListCmd ToolchainListCmd
func (c *ToolchainListCmd) Execute(args []string) error {
toolchains, err := toolchain.List()
if err != nil {
return err
}
fmtStr := "%-40s %s\n"
fmt.Printf(fmtStr, "PATH", "TYPE")
for _, t := range toolchains {
var exes []string
if t.Program != "" {
exes = append(exes, "program")
}
if t.Dockerfile != "" {
exes = append(exes, "docker")
}
fmt.Printf(fmtStr, t.Path, strings.Join(exes, ", "))
}
return nil
}
type ToolchainListToolsCmd struct {
Op string `short:"p" long:"op" description:"only list tools that perform these operations only" value-name:"OP"`
SourceUnitType string `short:"u" long:"source-unit-type" description:"only list tools that operate on this source unit type" value-name:"TYPE"`
Args struct {
Toolchains []ToolchainPath `name:"TOOLCHAINS" description:"only list tools in these toolchains"`
} `positional-args:"yes" required:"yes"`
}
var toolchainListToolsCmd ToolchainListToolsCmd
func (c *ToolchainListToolsCmd) Execute(args []string) error {
tcs, err := toolchain.List()
if err != nil {
log.Fatal(err)
}
fmtStr := "%-40s %-18s %-15s %-25s\n"
fmt.Printf(fmtStr, "TOOLCHAIN", "TOOL", "OP", "SOURCE UNIT TYPES")
for _, tc := range tcs {
if len(c.Args.Toolchains) > 0 {
found := false
for _, tc2 := range c.Args.Toolchains {
if string(tc2) == tc.Path {
found = true
break
}
}
if !found {
continue
}
}
cfg, err := tc.ReadConfig()
if err != nil {
log.Fatal(err)
}
for _, t := range cfg.Tools {
if c.Op != "" && c.Op != t.Op {
continue
}
if c.SourceUnitType != "" {
found := false
for _, u := range t.SourceUnitTypes {
if c.SourceUnitType == u {
found = true
break
}
}
if !found {
continue
}
}
fmt.Printf(fmtStr, tc.Path, t.Subcmd, t.Op, strings.Join(t.SourceUnitTypes, " "))
}
}
return nil
}
type ToolchainBuildCmd struct {
Args struct {
Toolchains []ToolchainPath `name:"TOOLCHAINS" description:"toolchain paths of toolchains to build"`
} `positional-args:"yes" required:"yes"`
}
var toolchainBuildCmd ToolchainBuildCmd
func (c *ToolchainBuildCmd) Execute(args []string) error {
var wg sync.WaitGroup
for _, tc := range c.Args.Toolchains {
tc, err := toolchain.Open(string(tc), toolchain.AsDockerContainer)
if err != nil {
log.Fatal(err)
}
wg.Add(1)
go func() {
defer wg.Done()
if err := tc.Build(); err != nil {
log.Fatal(err)
}
}()
}
wg.Wait()
return nil
}
type ToolchainGetCmd struct {
Update bool `short:"u" long:"update" description:"use the network to update the toolchain"`
Args struct {
Toolchains []ToolchainPath `name:"TOOLCHAINS" description:"toolchain paths of toolchains to get"`
} `positional-args:"yes" required:"yes"`
}
var toolchainGetCmd ToolchainGetCmd
func (c *ToolchainGetCmd) Execute(args []string) error {
for _, tc := range c.Args.Toolchains {
if GlobalOpt.Verbose {
fmt.Println(tc)
}
_, err := toolchain.Get(string(tc), c.Update)
if err != nil {
return err
}
}
return nil
}
type ToolchainAddCmd struct {
Dir string `long:"dir" description:"directory containing toolchain to add" value-name:"DIR"`
Args struct {
ToolchainPath string `name:"TOOLCHAIN" default:"." description:"toolchain path to use for toolchain directory"`
} `positional-args:"yes" required:"yes"`
}
var toolchainAddCmd ToolchainAddCmd
func (c *ToolchainAddCmd) Execute(args []string) error {
return toolchain.Add(c.Dir, c.Args.ToolchainPath)
}
type ToolchainInstallStdCmd struct {
Skip []string `long:"skip" description:"skip installing matching toolchains (can be specified multiple times; e.g., --skip go --skip ruby)" value-name:"NAME"`
}
var toolchainInstallStdCmd ToolchainInstallStdCmd
func (c *ToolchainInstallStdCmd) Execute(args []string) error {
fmt.Println(brush.Cyan("Installing/upgrading standard toolchains..."))
fmt.Println()
x := []struct {
name string
fn func() error
}{
{"Go (sourcegraph.com/sourcegraph/srclib-go)", c.installGoToolchain},
{"Python (sourcegraph.com/sourcegraph/srclib-python)", c.installPythonToolchain},
{"Ruby (sourcegraph.com/sourcegraph/srclib-ruby)", c.installRubyToolchain},
{"JavaScript (sourcegraph.com/sourcegraph/srclib-javascript)", c.installJavaScriptToolchain},
}
OuterLoop:
for _, x := range x {
name := x.name
for _, skip := range c.Skip {
if strings.Contains(name, skip) {
fmt.Println(brush.Yellow(fmt.Sprintf("Skipping installation of %s", name)))
continue OuterLoop
}
}
fmt.Println(brush.Cyan(name + " " + strings.Repeat("=", 78-len(name))).String())
if err := x.fn(); err != nil {
if err, ok := err.(skippedToolchain); ok {
fmt.Println(brush.Yellow(err.Error()).String())
fmt.Println()
continue
}
return errors.New(brush.Red(fmt.Sprintf("failed to install/upgrade %s toolchain: %s", name, err)).String())
}
fmt.Println(brush.Green("OK! Installed/upgraded " + name + " toolchain").String())
fmt.Println(brush.Cyan(strings.Repeat("=", 80)).String())
fmt.Println()
}
return nil
}
func (c *ToolchainInstallStdCmd) installGoToolchain() error {
const toolchain = "sourcegraph.com/sourcegraph/srclib-go"
gopath := os.Getenv("GOPATH")
if gopath == "" {
return skippedToolchain{toolchain, "no GOPATH set (assuming Go is not installed and you don't want the Go toolchain)"}
}
srclibpathDir := filepath.Join(strings.Split(srclib.Path, ":")[0], toolchain) // toolchain dir under SRCLIBPATH
if err := os.MkdirAll(filepath.Dir(srclibpathDir), 0700); err != nil {
return err
}
if skipmsg, err := symlinkToGopath(toolchain); err != nil {
return err
} else if skipmsg != "" {
return skippedToolchain{toolchain, skipmsg}
}
log.Println("Downloading or updating Go toolchain in", srclibpathDir)
if err := execCmd("src", "toolchain", "get", "-u", toolchain); err != nil {
return err
}
log.Println("Building Go toolchain program")
if err := execCmd("make", "-C", srclibpathDir); err != nil {
return err
}
return nil
}
func (c *ToolchainInstallStdCmd) installRubyToolchain() error {
const toolchain = "sourcegraph.com/sourcegraph/srclib-ruby"
srclibpathDir := filepath.Join(strings.Split(srclib.Path, ":")[0], toolchain) // toolchain dir under SRCLIBPATH
if _, err := exec.LookPath("ruby"); isExecErrNotFound(err) {
return skippedToolchain{toolchain, "no `ruby` in PATH (assuming you don't have Ruby installed and you don't want the Ruby toolchain)"}
}
if _, err := exec.LookPath("bundle"); isExecErrNotFound(err) {
return fmt.Errorf("found `ruby` in PATH but did not find `bundle` in PATH; Ruby toolchain requires bundler (run `gem install bundler` to install it)")
}
log.Println("Downloading or updating Ruby toolchain in", srclibpathDir)
if err := execCmd("src", "toolchain", "get", "-u", toolchain); err != nil {
return err
}
log.Println("Installing deps for Ruby toolchain in", srclibpathDir)
if err := execCmd("make", "-C", srclibpathDir); err != nil {
return fmt.Errorf("%s\n\nTip: If you are using a version of Ruby other than 2.1.2 (the default for srclib), or if you are using your system Ruby, try using a Ruby version manager (such as https://rvm.io) to install a more standard Ruby, and try Ruby 2.1.2.\n\nIf you are still having problems, post an issue at https://github.com/sourcegraph/srclib-ruby/issues with the full log output and information about your OS and Ruby version.\n\nIf you don't care about Ruby, skip this installation by running `src toolchain install-std --skip ruby`.", err)
}
return nil
}
func (c *ToolchainInstallStdCmd) installJavaScriptToolchain() error {
const toolchain = "sourcegraph.com/sourcegraph/srclib-javascript"
srclibpathDir := filepath.Join(strings.Split(srclib.Path, ":")[0], toolchain) // toolchain dir under SRCLIBPATH
if _, err := exec.LookPath("node"); isExecErrNotFound(err) {
return skippedToolchain{toolchain, "no `node` in PATH (assuming you don't have Node.js installed and you don't want the JavaScript toolchain)"}
}
if _, err := exec.LookPath("npm"); isExecErrNotFound(err) {
return fmt.Errorf("no `npm` in PATH; JavaScript toolchain requires npm")
}
log.Println("Downloading or updating JavaScript toolchain in", srclibpathDir)
if err := execCmd("src", "toolchain", "get", "-u", toolchain); err != nil {
return err
}
return nil
}
func (c *ToolchainInstallStdCmd) installPythonToolchain() error {
const toolchain = "sourcegraph.com/sourcegraph/srclib-python"
requiredCmds := map[string]string{
"go": "visit https://golang.org/doc/install",
"python": "visit https://www.python.org/downloads/",
"pip": "visit http://pip.readthedocs.org/en/latest/installing.html",
"virtualenv": "run `[sudo] pip install virtualenv`",
}
for requiredCmd, instructions := range requiredCmds {
if _, err := exec.LookPath(requiredCmd); isExecErrNotFound(err) {
return skippedToolchain{toolchain, fmt.Sprintf("no `%s` found in PATH; to install, %s", requiredCmd, instructions)}
}
}
srclibpathDir := filepath.Join(strings.Split(srclib.Path, ":")[0], toolchain) // toolchain dir under SRCLIBPATH
log.Println("Downloading or updating Python toolchain in", srclibpathDir)
if err := execCmd("src", "toolchain", "get", "-u", toolchain); err != nil {
return err
}
// Add symlink to GOPATH so install succeeds (necessary as long as there's a Go dependency in this toolchain)
if skipmsg, err := symlinkToGopath(toolchain); err != nil {
return err
} else if skipmsg != "" {
return skippedToolchain{toolchain, skipmsg}
}
log.Println("Installing deps for Python toolchain in", srclibpathDir)
if err := execCmd("make", "-C", srclibpathDir, "install"); err != nil {
return err
}
return nil
}
type skippedToolchain struct {
toolchain string
why string
}
func (e skippedToolchain) Error() string {
return fmt.Sprintf("skipped %s: %s", e.toolchain, e.why)
}
func isExecErrNotFound(err error) bool {
if e, ok := err.(*exec.Error); ok && e.Err == exec.ErrNotFound {
return true
}
return false
}
func symlinkToGopath(toolchain string) (skip string, err error) {
gopath := os.Getenv("GOPATH")
if gopath == "" {
return "", fmt.Errorf("GOPATH not set")
}
srcDir := filepath.Join(strings.Split(gopath, ":")[0], "src")
gopathDir := filepath.Join(srcDir, toolchain)
srclibpathDir := filepath.Join(strings.Split(srclib.Path, ":")[0], toolchain)
if fi, err := os.Lstat(gopathDir); os.IsNotExist(err) {
log.Printf("mkdir -p %s", filepath.Dir(gopathDir))
if err := os.MkdirAll(filepath.Dir(gopathDir), 0700); err != nil {
return "", err
}
log.Printf("ln -s %s %s", srclibpathDir, gopathDir)
if err := os.Symlink(srclibpathDir, gopathDir); err != nil {
return "", err
}
} else if err != nil {
return "", err
} else if fi.Mode()&os.ModeSymlink == 0 {
return fmt.Sprintf("toolchain dir in GOPATH (%s) is not a symlink (assuming you intentionally cloned the toolchain repo to your GOPATH; not modifying it)", gopathDir), nil
}
log.Printf("Symlinked toolchain %s into your GOPATH at", toolchain, gopathDir)
return "", nil
}