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bootstrap.go
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bootstrap.go
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package bootstrap
import (
"errors"
"flag"
"fmt"
"go/build"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"strings"
"github.com/infobloxopen/atlas-cli/atlas/application"
"github.com/infobloxopen/atlas-cli/atlas/application/helm"
"github.com/infobloxopen/atlas-cli/atlas/utill"
"golang.org/x/tools/imports"
)
const (
// the full set of command names
commandInitApp = "init-app"
// the full set of flag names
flagAppName = "name"
flagRegistryName = "registry"
flagWithGateway = "gateway"
flagWithDebug = "debug"
flagWithDatabase = "db"
flagWithHealth = "health"
flagWithMetrics = "metrics"
flagWithPubsub = "pubsub"
flagWithProfiler = "profiler"
flagWithHelm = "helm"
flagExpandName = "expand"
flagWithKind = "kind"
flagWithDelve = "delve"
flagWithSubscribeTopic = "subscribe-topic"
flagWithPublishTopic = "publish-topic"
)
var (
// flag set for initializing the application
initialize = flag.NewFlagSet(commandInitApp, flag.ExitOnError)
initializeName = initialize.String(flagAppName, "", "the application name (required)")
initializeRegistry = initialize.String(flagRegistryName, "", "the Docker registry (optional)")
initializeGateway = initialize.Bool(flagWithGateway, false, "generate project with a gRPC gateway (default false)")
initializeDebug = initialize.Bool(flagWithDebug, false, "print debug statements during intialization (default false)")
initializeDatabase = initialize.Bool(flagWithDatabase, false, "initialize the application with database folders")
initializeHealth = initialize.Bool(flagWithHealth, false, "initialize the application with internal health checks")
initializeMetrics = initialize.Bool(flagWithMetrics, true, "initialize the application with gRPC Prometheus metrics")
initializePubsub = initialize.Bool(flagWithPubsub, false, "initialize the application with a pubsub example")
initializeProfiler = initialize.Bool(flagWithProfiler, false, "initialize the application with a profiling service")
initializeHelm = initialize.Bool(flagWithHelm, false, "initialize the application with the helm charts")
initializeExpand = initialize.String(flagExpandName, "", "the name of the input file for the `expand` command (optional)")
initializeKind = initialize.Bool(flagWithKind, false, "initialize the application with KinD support (optional, only applicable when helm charts are enabled)")
initializeDebugger = initialize.Bool(flagWithDelve, false, "initialize the application with remote debug support (optional, only applicable when helm charts are enabled)")
initializeSubscribeTopic = initialize.String(flagWithSubscribeTopic, "", "topic name where Dapr subscribes to (enable dapr support if the topic name is not empty)")
initializePublishTopic = initialize.String(flagWithPublishTopic, "", "topic name where Dapr publishes to (enable dapr support if the topic name is not empty)")
)
// bootstrap implements the command interface for project intialization
type Bootstrap struct{}
func (b Bootstrap) GetName() string { return "init-app" }
func (b Bootstrap) GetFlagset() *flag.FlagSet { return initialize }
func (b Bootstrap) Run() error {
if *initializeName == "" {
return initializationError{
errors.New("application name is required"),
}
}
wd, err := os.Getwd()
if err != nil {
return initializationError{err: err}
}
root, err := utill.ProjectRoot(build.Default.GOPATH, wd)
if err != nil {
return initializationError{err: err}
}
app := application.Application{
Name: *initializeName,
Registry: *initializeRegistry,
Root: root,
WithGateway: *initializeGateway,
WithDatabase: *initializeDatabase,
WithHealth: *initializeHealth,
WithMetrics: *initializeMetrics,
WithPubsub: *initializePubsub,
WithProfiler: *initializeProfiler,
WithHelm: *initializeHelm,
ExpandName: *initializeExpand,
WithDelve: *initializeDebugger,
WithKind: *initializeKind,
WithSubscribeTopic: *initializeSubscribeTopic,
WithPublishTopic: *initializePublishTopic,
}
if app.WithHelm {
app.Helm = helm.New(app.Name)
}
if err := app.Initialize(); err != nil {
return initializationError{err: err}
}
if app.ExpandName != "" {
if err := expandResource(app.Name, app.ExpandName, app.WithDatabase); err != nil {
return err
}
if err := CombineFiles("pkg/pb/service.proto", "pkg/pb/"+app.Name+".proto"); err != nil {
return err
}
if err := CombineFiles("pkg/svc/zserver.go", "pkg/svc/servers.go"); err != nil {
return err
}
}
if err := checkDockerPermissions(); err != nil {
return err
}
if err := generateProtobuf(); err != nil {
return err
}
if err := initGoMod(); err != nil {
return err
}
if err := resolveImports(app.GetDirectories()); err != nil {
return err
}
if err := initRepo(); err != nil {
return err
}
return nil
}
type initializationError struct{ err error }
func (e initializationError) Error() string {
return fmt.Sprintf("Unable to initialize application: %s", e.err.Error())
}
func runCommand(command string, args ...string) error {
cmd := exec.Command(command, args...)
if *initializeDebug {
cmd.Stderr = os.Stdout
cmd.Stdout = os.Stderr
}
if err := cmd.Run(); err != nil {
return err
}
return nil
}
// check that docker have enough permissions
func checkDockerPermissions() error {
cmd := exec.Command("docker", "info")
if output, err := cmd.Output(); err != nil {
output := string(output)
return errors.New(output[strings.Index(output, "ERROR:"):])
}
return nil
}
// generateProtobuf calls "make protobuf" to render initial .pb files
func generateProtobuf() error {
fmt.Print("Generating protobuf files... ")
if err := runCommand("make", "protobuf"); err != nil {
return err
}
fmt.Println("done!")
return nil
}
// initGoMod calls "go mod init" to generate .toml files
func initGoMod() error {
fmt.Print("Starting mod project... ")
if err := runCommand("go", "mod", "tidy"); err != nil {
return err
}
if err := runCommand("go", "mod", "vendor"); err != nil {
return err
}
fmt.Println("done!")
return nil
}
// resolveImports resolves imports for a given set of a packages
func resolveImports(dirs []string) error {
fmt.Print("Resolving imports... ")
for _, dir := range dirs {
if err := filepath.Walk(dir, resolveFileImports); err != nil {
return err
}
}
fmt.Println("done!")
return nil
}
// resolveFileImports determines missing import paths for a given go file and
// also fixes any formatting issues
func resolveFileImports(path string, f os.FileInfo, err error) error {
if err == nil && isGoFile(f) {
withImports, err := imports.Process(path, nil, nil)
if err != nil {
return err
}
if err := ioutil.WriteFile(path, withImports, 0); err != nil {
return err
}
}
return nil
}
func isGoFile(f os.FileInfo) bool {
// ignore non-Go files
name := f.Name()
return !f.IsDir() && !strings.HasPrefix(name, ".") && strings.HasSuffix(name, ".go")
}
// initRepo initializes new applications as a git repository
func initRepo() error {
fmt.Print("Initializing git repo... ")
if err := runCommand("git", "init"); err != nil {
return err
}
if err := runCommand("git", "add", "*"); err != nil {
return err
}
if err := runCommand("git", "commit", "-m", "Initial commit"); err != nil {
return err
}
if err := runCommand("git", "tag", "v0.0.1"); err != nil {
return err
}
fmt.Println("done!")
return nil
}