add apps detect command

Author: pulkit-khullar

args.go

@@ -406,4 +406,13 @@ const (
 
 	// ArgAlertPolicySlackURLs are the Slack URLs to send alerts to.
 	ArgAlertPolicySlackURLs = "slack-urls"
+
+	// ArgCommitHash are the Git commit hash.
+	ArgCommitHash = "sha"
+	// ArgProjectSource is either git, github or gitlab.
+	ArgProjectSource = "source"
+	// ArgDeployOnPush allow auto deploy on project update.
+	ArgDeployOnPush = "deployonpush"
+	// ArgProjectBrach is git project branch.
+	ArgProjectBrach = "branch"
 )

commands/apps.go

@@ -22,6 +22,7 @@ import (
 	"net/http"
 	"net/url"
 	"os"
+	"strconv"
 	"strings"
 	"time"
 
@@ -113,6 +114,15 @@ This permanently deletes the app and all its associated deployments.`,
 	)
 	AddBoolFlag(deleteApp, doctl.ArgForce, doctl.ArgShortForce, false, "Delete the App without a confirmation prompt")
 
+	// output is global flag
+	detect := CmdBuilder(cmd,
+		RunAppsDetect, "detect", "Detect functions", "Detect functions project and convert it into apps project by adding the AppSpec.", Writer, aliasOpt("dt"))
+	AddStringFlag(detect, doctl.ArgProjectSource, "", "", `Project source.`)
+	AddStringFlag(detect, doctl.ArgCommitHash, "", "", `Git commit hash`) // not sure if need to support commit hash?
+	AddStringFlag(detect, doctl.ArgProjectName, "", "", `App name to be used`)
+	AddStringFlag(detect, doctl.ArgProjectBrach, "", "", `Project branch to be used`)
+	AddBoolFlag(detect, doctl.ArgDeployOnPush, "", *boolPtr(true), `Auto deploy on project update.`)
+
 	deploymentCreate := CmdBuilder(
 		cmd,
 		RunAppsCreateDeployment,
@@ -393,6 +403,69 @@ func RunAppsDelete(c *CmdConfig) error {
 	return nil
 }
 
+// RunAppsDetect detects an function project and converts it into apps project.
+func RunAppsDetect(c *CmdConfig) error {
+	source, err := c.Doit.GetString(c.NS, doctl.ArgProjectSource)
+	if err != nil {
+		return err
+	}
+	if len(source) == 0 {
+		return fmt.Errorf("source cannot be empty")
+	}
+
+	sha, err := c.Doit.GetString(c.NS, doctl.ArgCommitHash)
+	if err != nil {
+		return err
+	}
+
+	name, err := c.Doit.GetString(c.NS, doctl.ArgProjectName)
+	if err != nil {
+		return err
+	}
+	if len(name) == 0 {
+		return fmt.Errorf("name cannot be empty")
+	}
+
+	branch, err := c.Doit.GetString(c.NS, doctl.ArgProjectBrach)
+	if err != nil {
+		return err
+	}
+	if len(branch) == 0 {
+		return fmt.Errorf("branch cannot be empty")
+	}
+
+	// Need to check, How user value will be overrided
+	autoDeploy, err := c.Doit.GetBool(c.NS, doctl.ArgDeployOnPush)
+	if err != nil {
+		return err
+	}
+	if len(c.Args) > 0 {
+		fmt.Println(c.Args[0])
+		x, err := strconv.ParseBool(c.Args[0])
+		if err == nil {
+			autoDeploy = x
+		} else {
+			return fmt.Errorf("expected true/false for deployonpush, received : %s", c.Args[0])
+		}
+	}
+
+	spec, err := c.Apps().Detect(source, sha, name, branch, autoDeploy)
+	if err != nil {
+		return err
+	}
+
+	switch Output {
+	case "json":
+		e := json.NewEncoder(c.Out)
+		e.SetIndent("", "  ")
+		return e.Encode(spec)
+	case "text":
+		return nil
+	default:
+		return fmt.Errorf("unknown output type")
+	}
+}
+
 // RunAppsCreateDeployment creates a deployment for an app.
 func RunAppsCreateDeployment(c *CmdConfig) error {
 	if len(c.Args) < 1 {

do/apps.go

@@ -15,6 +15,7 @@ package do
 
 import (
 	"context"
+	"strings"
 
 	"github.com/digitalocean/godo"
 )
@@ -26,6 +27,7 @@ type AppsService interface {
 	List() ([]*godo.App, error)
 	Update(appID string, req *godo.AppUpdateRequest) (*godo.App, error)
 	Delete(appID string) error
+	Detect(source string, sha string, name string, branch string, autoDeploy bool) (*godo.AppSpec, error)
 	Propose(req *godo.AppProposeRequest) (*godo.AppProposeResponse, error)
 
 	CreateDeployment(appID string, forceRebuild bool) (*godo.Deployment, error)
@@ -119,6 +121,86 @@ func (s *appsService) Delete(appID string) error {
 	return err
 }
 
+func (s *appsService) Detect(source string, sha string, name string, branch string, autoDeploy bool) (*godo.AppSpec, error) {
+	var dr godo.DetectRequest
+	if strings.Contains(source, "github") {
+		dr.GitHub = &godo.GitHubSourceSpec{
+			Repo:         verifyGitSource(source, "github"),
+			Branch:       branch,
+			DeployOnPush: autoDeploy,
+		}
+	} else if strings.Contains(source, "gitlab") {
+		dr.GitLab = &godo.GitLabSourceSpec{
+			Repo:         verifyGitSource(source, "gitlab"),
+			Branch:       branch,
+			DeployOnPush: autoDeploy,
+		}
+	} else {
+		dr.Git = &godo.GitSourceSpec{
+			RepoCloneURL: source,
+			Branch:       branch,
+		}
+	}
+	dr.SourceDir = "/"
+	dr.CommitSHA = sha
+
+	resp, _, err := s.client.Apps.Detect(context.Background(), &dr)
+	if err != nil {
+		return nil, err
+	}
+
+	var appSpec godo.AppSpec
+
+	appSpec.Name = name
+	var funcSpecArray []*godo.AppFunctionsSpec
+	for _, component := range resp.Components {
+
+		if component.Strategy == "SERVERLESS" {
+			for _, serverlessPackage := range component.ServerlessPackages {
+				var functionSpec godo.AppFunctionsSpec
+				functionSpec.Name = serverlessPackage.Name
+				if strings.Contains(source, "github") {
+					functionSpec.GitHub = &godo.GitHubSourceSpec{
+						Repo:         verifyGitSource(source, "github"),
+						Branch:       branch,
+						DeployOnPush: autoDeploy,
+					}
+				} else if strings.Contains(source, "gitlab") {
+					functionSpec.GitLab = &godo.GitLabSourceSpec{
+						Repo:         verifyGitSource(source, "gitlab"),
+						Branch:       branch,
+						DeployOnPush: autoDeploy,
+					}
+				} else {
+					functionSpec.Git = &godo.GitSourceSpec{
+						RepoCloneURL: source,
+						Branch:       branch,
+					}
+				}
+				functionSpec.SourceDir = "/"
+				functionSpec.Routes = []*godo.AppRouteSpec{
+					{
+						Path:               "/",
+						PreservePathPrefix: false,
+					},
+				}
+				funcSpecArray = append(funcSpecArray, &functionSpec)
+
+			}
+		}
+		appSpec.Functions = funcSpecArray
+	}
+	return &appSpec, nil
+}
+
+func verifyGitSource(s string, splitter string) string {
+	x := strings.Split(s, splitter+".com/")
+	if strings.Contains(x[1], ".git") {
+		x = strings.Split(x[1], ".")
+	}
+	return x[0]
+}
+
 func (s *appsService) Propose(req *godo.AppProposeRequest) (*godo.AppProposeResponse, error) {
 	res, _, err := s.client.Apps.Propose(s.ctx, req)
 	if err != nil {