/
new.go
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/
new.go
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// Package new generates stack service templates
package new
import (
"fmt"
"go/build"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"text/template"
"time"
"github.com/stack-labs/stack/pkg/cli"
tmpl "github.com/stack-labs/stack/util/stackctl/new/template"
"github.com/xlab/treeprint"
)
type config struct {
// foo
Alias string
// stackctl new example -type
Command string
// stack.rpc
Namespace string
// api, service, web, function
Type string
// go.stack.service.foo
FQDN string
// github.com/stack-labs/foo
Dir string
// $GOPATH/src/github.com/stack-labs/foo
GoDir string
// $GOPATH
GoPath string
// UseGoPath
UseGoPath bool
// Files
Files []file
// Comments
Comments []string
// Plugins registry=etcd:broker=nats
Plugins []string
}
type file struct {
Path string
Tmpl string
}
func write(c config, file, tmpl string) error {
fn := template.FuncMap{
"title": strings.Title,
}
f, err := os.Create(file)
if err != nil {
return err
}
defer f.Close()
t, err := template.New("f").Funcs(fn).Parse(tmpl)
if err != nil {
return err
}
return t.Execute(f, c)
}
func create(c config) error {
// check if dir exists
if _, err := os.Stat(c.GoDir); !os.IsNotExist(err) {
return fmt.Errorf("%s already exists", c.GoDir)
}
// just wait
<-time.After(time.Millisecond * 250)
fmt.Printf("Creating service %s in %s\n\n", c.FQDN, c.GoDir)
t := treeprint.New()
nodes := map[string]treeprint.Tree{}
nodes[c.GoDir] = t
// write the files
for _, file := range c.Files {
f := filepath.Join(c.GoDir, file.Path)
dir := filepath.Dir(f)
b, ok := nodes[dir]
if !ok {
d, _ := filepath.Rel(c.GoDir, dir)
b = t.AddBranch(d)
nodes[dir] = b
}
if _, err := os.Stat(dir); os.IsNotExist(err) {
if err := os.MkdirAll(dir, 0755); err != nil {
return err
}
}
p := filepath.Base(f)
b.AddNode(p)
if err := write(c, f, file.Tmpl); err != nil {
return err
}
}
// print tree
fmt.Println(t.String())
for _, comment := range c.Comments {
fmt.Println(comment)
}
// just wait
<-time.After(time.Millisecond * 250)
return nil
}
func run(ctx *cli.Context) {
namespace := ctx.String("namespace")
alias := ctx.String("alias")
fqdn := ctx.String("fqdn")
atype := ctx.String("type")
dir := ctx.Args().First()
useGoPath := ctx.Bool("gopath")
useGoModule := os.Getenv("GO111MODULE")
var plugins []string
if len(dir) == 0 {
fmt.Println("specify service name")
return
}
if len(namespace) == 0 {
fmt.Println("namespace not defined")
return
}
if len(atype) == 0 {
fmt.Println("type not defined")
return
}
// set the command
command := fmt.Sprintf("stackctl new %s", dir)
if len(namespace) > 0 {
command += " --namespace=" + namespace
}
if len(alias) > 0 {
command += " --alias=" + alias
}
if len(fqdn) > 0 {
command += " --fqdn=" + fqdn
}
if len(atype) > 0 {
command += " --type=" + atype
}
if plugins := ctx.StringSlice("plugin"); len(plugins) > 0 {
command += " --plugin=" + strings.Join(plugins, ":")
}
// check if the path is absolute, we don't want this
// we want to a relative path so we can install in GOPATH
if path.IsAbs(dir) {
fmt.Println("require relative path as service will be installed in GOPATH")
return
}
var goPath string
var goDir string
// only set gopath if told to use it
if useGoPath {
goPath = build.Default.GOPATH
// don't know GOPATH, runaway....
if len(goPath) == 0 {
fmt.Println("unknown GOPATH")
return
}
// attempt to split path if not windows
if runtime.GOOS == "windows" {
goPath = strings.Split(goPath, ";")[0]
} else {
goPath = strings.Split(goPath, ":")[0]
}
goDir = filepath.Join(goPath, "src", path.Clean(dir))
} else {
goDir = path.Clean(dir)
}
if len(alias) == 0 {
// set as last part
alias = filepath.Base(dir)
// strip hyphens
parts := strings.Split(alias, "-")
alias = parts[0]
}
if len(fqdn) == 0 {
fqdn = strings.Join([]string{namespace, atype, alias}, ".")
}
for _, plugin := range ctx.StringSlice("plugin") {
// registry=etcd:broker=nats
for _, p := range strings.Split(plugin, ":") {
// registry=etcd
parts := strings.Split(p, "=")
if len(parts) < 2 {
continue
}
plugins = append(plugins, path.Join(parts...))
}
}
var c config
switch atype {
case "function":
// create service config
c = config{
Alias: alias,
Command: command,
Namespace: namespace,
Type: atype,
FQDN: fqdn,
Dir: dir,
GoDir: goDir,
GoPath: goPath,
UseGoPath: useGoPath,
Plugins: plugins,
Files: []file{
{"main.go", tmpl.MainFNC},
{"generate.go", tmpl.GenerateFile},
{"plugin.go", tmpl.Plugin},
{"stack.yml", tmpl.StackConfig},
{"handler/" + alias + ".go", tmpl.HandlerFNC},
{"subscriber/" + alias + ".go", tmpl.SubscriberFNC},
{"proto/" + alias + "/" + alias + ".proto", tmpl.ProtoFNC},
{"Dockerfile", tmpl.DockerFNC},
{"Makefile", tmpl.Makefile},
{"README.md", tmpl.ReadmeFNC},
{".gitignore", tmpl.GitIgnore},
},
Comments: []string{
"\ndownload protobuf for stack:\n",
"brew install protobuf",
"go get -u github.com/golang/protobuf/{proto,protoc-gen-go}",
"go get -u github.com/stack-lags/stack/util/protoc-gen-stack",
"\ncompile the proto file " + alias + ".proto:\n",
"cd " + goDir,
//"protoc --proto_path=.:$GOPATH/src --go_out=. --stack_out=. proto/" + alias + "/" + alias + ".proto\n",
"make proto",
},
}
case "service":
// create service config
c = config{
Alias: alias,
Command: command,
Namespace: namespace,
Type: atype,
FQDN: fqdn,
Dir: dir,
GoDir: goDir,
GoPath: goPath,
UseGoPath: useGoPath,
Plugins: plugins,
Files: []file{
{"main.go", tmpl.MainSRV},
{"generate.go", tmpl.GenerateFile},
{"plugin.go", tmpl.Plugin},
{"stack.yml", tmpl.StackConfig},
{"handler/" + alias + ".go", tmpl.HandlerSRV},
{"subscriber/" + alias + ".go", tmpl.SubscriberSRV},
{"proto/" + alias + "/" + alias + ".proto", tmpl.ProtoSRV},
{"Dockerfile", tmpl.DockerSRV},
{"Makefile", tmpl.Makefile},
{"README.md", tmpl.Readme},
{".gitignore", tmpl.GitIgnore},
},
Comments: []string{
"\ndownload protobuf for stack:\n",
"brew install protobuf",
"go get -u github.com/golang/protobuf/{proto,protoc-gen-go}",
"go get -u github.com/stack-labs/stack/util/protoc-gen-stack",
"\ncompile the proto file " + alias + ".proto:\n",
"cd " + goDir,
//"protoc --proto_path=.:$GOPATH/src --go_out=. --stack_out=. proto/" + alias + "/" + alias + ".proto\n",
"make proto",
},
}
case "api":
// create api config
c = config{
Alias: alias,
Command: command,
Namespace: namespace,
Type: atype,
FQDN: fqdn,
Dir: dir,
GoDir: goDir,
GoPath: goPath,
UseGoPath: useGoPath,
Plugins: plugins,
Files: []file{
{"main.go", tmpl.MainAPI},
{"generate.go", tmpl.GenerateFile},
{"plugin.go", tmpl.Plugin},
{"stack.yml", tmpl.StackConfig},
{"client/" + alias + ".go", tmpl.WrapperAPI},
{"handler/" + alias + ".go", tmpl.HandlerAPI},
{"proto/" + alias + "/" + alias + ".proto", tmpl.ProtoAPI},
{"Makefile", tmpl.Makefile},
{"Dockerfile", tmpl.DockerSRV},
{"README.md", tmpl.Readme},
{".gitignore", tmpl.GitIgnore},
},
Comments: []string{
"\ndownload protobuf for stack:\n",
"brew install protobuf",
"go get -u github.com/golang/protobuf/{proto,protoc-gen-go}",
"go get -u github.com/stack-labs/stack/util/protoc-gen-stack",
"\ncompile the proto file " + alias + ".proto:\n",
"cd " + goDir,
//"protoc --proto_path=.:$GOPATH/src --go_out=. --stack_out=. proto/" + alias + "/" + alias + ".proto\n",
"make proto",
},
}
case "web":
// TODO web service need redesign
fmt.Println("TODO web service unsupported")
return
// create service config
c = config{
Alias: alias,
Command: command,
Namespace: namespace,
Type: atype,
FQDN: fqdn,
Dir: dir,
GoDir: goDir,
GoPath: goPath,
UseGoPath: useGoPath,
Plugins: plugins,
Files: []file{
{"main.go", tmpl.MainWEB},
{"plugin.go", tmpl.Plugin},
{"stack.yml", tmpl.StackConfig},
{"handler/handler.go", tmpl.HandlerWEB},
{"html/index.html", tmpl.HTMLWEB},
{"Dockerfile", tmpl.DockerWEB},
{"Makefile", tmpl.Makefile},
{"README.md", tmpl.Readme},
{".gitignore", tmpl.GitIgnore},
},
Comments: []string{},
}
default:
fmt.Println("Unknown type", atype)
return
}
// set gomodule
if useGoModule != "off" {
c.Files = append(c.Files, file{"go.mod", tmpl.Module})
}
if err := create(c); err != nil {
fmt.Println(err)
return
}
}
func Commands() []cli.Command {
return []cli.Command{
{
Name: "new",
Usage: "Create a service template",
Flags: []cli.Flag{
&cli.StringFlag{
Name: "namespace",
Usage: "Namespace for the service e.g com.example",
Value: "stack.rpc",
},
&cli.StringFlag{
Name: "type",
Usage: "Type of service e.g api, function, service, web",
Value: "service",
},
&cli.StringFlag{
Name: "fqdn",
Usage: "FQDN of service e.g com.example.service.service (defaults to namespace.type.alias)",
},
&cli.StringFlag{
Name: "alias",
Usage: "Alias is the short name used as part of combined name if specified",
},
&cli.StringSliceFlag{
Name: "plugin",
Usage: "Specify plugins e.g --plugin=registry=etcd:broker=nats or use flag multiple times",
},
&cli.BoolFlag{
Name: "gopath",
Usage: "Create the service in the gopath.",
},
},
Action: func(c *cli.Context) error {
run(c)
return nil
},
},
}
}