porter/cli/cmd/create.go

package cmd

import (
	"fmt"
	"io/ioutil"
	"os"
	"path/filepath"

	"github.com/fatih/color"
	"github.com/porter-dev/porter/cli/cmd/api"
	"github.com/porter-dev/porter/cli/cmd/deploy"
	"github.com/porter-dev/porter/cli/cmd/gitutils"
	"github.com/spf13/cobra"
	"sigs.k8s.io/yaml"
)

// createCmd represents the "porter create" base command when called
// without any subcommands
var createCmd = &cobra.Command{
	Use:   "create [kind]",
	Args:  cobra.ExactArgs(1),
	Short: "Creates a new application with name given by the --app flag.",
	Long: fmt.Sprintf(`
%s 

Creates a new application with name given by the --app flag and a "kind", which can be one of 
web, worker, or job. For example:

  %s

To modify the default configuration of the application, you can pass a values.yaml file in via the 
--values flag. 

  %s

To read more about the configuration options, go here: 

https://docs.getporter.dev/docs/deploying-from-the-cli#common-configuration-options

This command will automatically build from a local path, and will create a new Docker image in your 
default Docker registry. The path can be configured via the --path flag. For example:
  
  %s

To connect the application to Github, so that the application rebuilds and redeploys on each push 
to a Github branch, you can specify "--source github". If your local branch is set to track changes 
from an upstream remote branch, Porter will try to use the connected remote and remote branch as the 
Github repository to link to. Otherwise, Porter will use the remote given by origin. For example:

  %s

To deploy an application from a Docker registry, use "--source registry" and pass the image in via the
--image flag. The image flag must be of the form repository:tag. For example:

  %s 
`,
		color.New(color.FgBlue, color.Bold).Sprintf("Help for \"porter create\":"),
		color.New(color.FgGreen, color.Bold).Sprintf("porter create web --app example-app"),
		color.New(color.FgGreen, color.Bold).Sprintf("porter create web --app example-app --values values.yaml"),
		color.New(color.FgGreen, color.Bold).Sprintf("porter create web --app example-app --path ./path/to/app"),
		color.New(color.FgGreen, color.Bold).Sprintf("porter create web --app example-app --source github"),
		color.New(color.FgGreen, color.Bold).Sprintf("porter create web --app example-app --source registry --image gcr.io/snowflake-12345/example-app:latest"),
	),
	Run: func(cmd *cobra.Command, args []string) {
		err := checkLoginAndRun(args, createFull)

		if err != nil {
			os.Exit(1)
		}
	},
}

var name string
var values string
var source string
var image string
var registryURL string

func init() {
	rootCmd.AddCommand(createCmd)

	createCmd.PersistentFlags().StringVar(
		&name,
		"app",
		"",
		"name of the new application/job/worker.",
	)

	createCmd.MarkPersistentFlagRequired("app")

	createCmd.PersistentFlags().StringVarP(
		&localPath,
		"path",
		"p",
		".",
		"if local build, the path to the build directory",
	)

	createCmd.PersistentFlags().StringVar(
		&namespace,
		"namespace",
		"default",
		"namespace of the application",
	)

	createCmd.PersistentFlags().StringVarP(
		&values,
		"values",
		"v",
		"",
		"filepath to a values.yaml file",
	)

	createCmd.PersistentFlags().StringVar(
		&dockerfile,
		"dockerfile",
		"",
		"the path to the dockerfile",
	)

	createCmd.PersistentFlags().StringVar(
		&method,
		"method",
		"",
		"the build method to use (\"docker\" or \"pack\")",
	)

	createCmd.PersistentFlags().StringVar(
		&source,
		"source",
		"local",
		"the type of source (\"local\", \"github\", or \"registry\")",
	)

	createCmd.PersistentFlags().StringVar(
		&image,
		"image",
		"",
		"if the source is \"registry\", the image to use, in repository:tag format",
	)

	createCmd.PersistentFlags().StringVar(
		&registryURL,
		"registry-url",
		"",
		"the registry URL to use (must exist in \"porter registries list\")",
	)
}

var supportedKinds = map[string]string{"web": "", "job": "", "worker": ""}

func createFull(resp *api.AuthCheckResponse, client *api.Client, args []string) error {
	// check the kind
	if _, exists := supportedKinds[args[0]]; !exists {
		return fmt.Errorf("%s is not a supported type: specify web, job, or worker", args[0])
	}

	// read the values if necessary
	valuesObj, err := readValuesFile()

	if err != nil {
		return err
	}

	color.New(color.FgGreen).Printf("Creating %s release: %s\n", args[0], name)

	fullPath, err := filepath.Abs(localPath)

	if err != nil {
		return err
	}

	var buildMethod deploy.DeployBuildType

	if method != "" {
		buildMethod = deploy.DeployBuildType(method)
	} else if dockerfile != "" {
		buildMethod = deploy.DeployBuildTypeDocker
	}

	createAgent := &deploy.CreateAgent{
		Client: client,
		CreateOpts: &deploy.CreateOpts{
			SharedOpts: &deploy.SharedOpts{
				ProjectID:       config.Project,
				ClusterID:       config.Cluster,
				Namespace:       namespace,
				LocalPath:       fullPath,
				LocalDockerfile: dockerfile,
				Method:          buildMethod,
			},
			Kind:        args[0],
			ReleaseName: name,
			RegistryURL: registryURL,
		},
	}

	if source == "local" {
		subdomain, err := createAgent.CreateFromDocker(valuesObj)

		return handleSubdomainCreate(subdomain, err)
	} else if source == "github" {
		return createFromGithub(createAgent, valuesObj)
	}

	subdomain, err := createAgent.CreateFromRegistry(image, valuesObj)

	return handleSubdomainCreate(subdomain, err)
}

func handleSubdomainCreate(subdomain string, err error) error {
	if err != nil {
		return err
	}

	if subdomain != "" {
		color.New(color.FgGreen).Printf("Your web application is ready at: %s\n", subdomain)
	} else {
		color.New(color.FgGreen).Printf("Application created successfully\n")
	}

	return nil
}

func createFromGithub(createAgent *deploy.CreateAgent, overrideValues map[string]interface{}) error {
	fullPath, err := filepath.Abs(localPath)

	if err != nil {
		return err
	}

	_, err = gitutils.GitDirectory(fullPath)

	if err != nil {
		return err
	}

	remote, gitBranch, err := gitutils.GetRemoteBranch(fullPath)

	if err != nil {
		return err
	} else if gitBranch == "" {
		return fmt.Errorf("git branch not automatically detectable")
	}

	ok, remoteRepo := gitutils.ParseGithubRemote(remote)

	if !ok {
		return fmt.Errorf("remote is not a Github repository")
	}

	subdomain, err := createAgent.CreateFromGithub(&deploy.GithubOpts{
		Branch: gitBranch,
		Repo:   remoteRepo,
	}, overrideValues)

	return handleSubdomainCreate(subdomain, err)
}

func readValuesFile() (map[string]interface{}, error) {
	res := make(map[string]interface{})

	if values == "" {
		return res, nil
	}

	valuesFilePath, err := filepath.Abs(values)

	if err != nil {
		return nil, err
	}

	if info, err := os.Stat(valuesFilePath); os.IsNotExist(err) || info.IsDir() {
		return nil, fmt.Errorf("values file does not exist or is a directory")
	}

	reader, err := os.Open(valuesFilePath)

	if err != nil {
		return nil, err
	}

	bytes, err := ioutil.ReadAll(reader)

	if err != nil {
		return nil, err
	}

	err = yaml.Unmarshal(bytes, &res)

	if err != nil {
		return nil, err
	}

	return res, nil
}