add tarball url endpoint

api/server/handlers/gitinstallation/get_tarball_url.go

@@ -0,0 +1,86 @@
+package gitinstallation
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/google/go-github/github"
+	"github.com/porter-dev/porter/api/server/authz"
+	"github.com/porter-dev/porter/api/server/handlers"
+	"github.com/porter-dev/porter/api/server/shared"
+	"github.com/porter-dev/porter/api/server/shared/apierrors"
+	"github.com/porter-dev/porter/api/server/shared/config"
+	"github.com/porter-dev/porter/api/server/shared/requestutils"
+	"github.com/porter-dev/porter/api/types"
+)
+
+type GithubGetTarballURLHandler struct {
+	handlers.PorterHandlerReadWriter
+	authz.KubernetesAgentGetter
+}
+
+func NewGithubGetTarballURLHandler(
+	config *config.Config,
+	decoderValidator shared.RequestDecoderValidator,
+	writer shared.ResultWriter,
+) *GithubGetTarballURLHandler {
+	return &GithubGetTarballURLHandler{
+		PorterHandlerReadWriter: handlers.NewDefaultPorterHandler(config, decoderValidator, writer),
+	}
+}
+
+func (c *GithubGetTarballURLHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	owner, name, ok := GetOwnerAndNameParams(c, w, r)
+
+	if !ok {
+		return
+	}
+
+	branch, reqErr := requestutils.GetURLParamString(r, types.URLParamGitBranch)
+
+	if reqErr != nil {
+		c.HandleAPIError(w, r, reqErr)
+		return
+	}
+
+	client, err := GetGithubAppClientFromRequest(c.Config(), r)
+
+	if err != nil {
+		c.HandleAPIError(w, r, apierrors.NewErrInternal(err))
+		return
+	}
+
+	branchResp, _, err := client.Repositories.GetBranch(
+		context.TODO(),
+		owner,
+		name,
+		branch,
+	)
+
+	if err != nil {
+		c.HandleAPIError(w, r, apierrors.NewErrInternal(err))
+		return
+	}
+
+	ghURL, _, err := client.Repositories.GetArchiveLink(
+		context.TODO(),
+		owner,
+		name,
+		github.Zipball,
+		&github.RepositoryContentGetOptions{
+			Ref: *branchResp.Commit.SHA,
+		},
+	)
+
+	if err != nil {
+		c.HandleAPIError(w, r, apierrors.NewErrInternal(err))
+		return
+	}
+
+	apiResp := &types.GetTarballURLResponse{
+		URLString:       ghURL.String(),
+		LatestCommitSHA: *branchResp.Commit.SHA,
+	}
+
+	c.WriteResult(w, r, apiResp)
+}

api/server/router/git_installation.go

@@ -257,5 +257,42 @@ func getGitInstallationRoutes(
 		Router:   r,
 	})
 
+	//  GET /api/projects/{project_id}/gitrepos/{installation_id}/repos/{kind}/{owner}/{name}/{branch}/tarball_url ->
+	// gitinstallation.NewGithubGetTarballURLHandler
+	getTarballURLEndpoint := factory.NewAPIEndpoint(
+		&types.APIRequestMetadata{
+			Verb:   types.APIVerbGet,
+			Method: types.HTTPVerbGet,
+			Path: &types.Path{
+				Parent: basePath,
+				RelativePath: fmt.Sprintf(
+					"%s/repos/{%s}/{%s}/{%s}/{%s}/tarball_url",
+					relPath,
+					types.URLParamGitKind,
+					types.URLParamGitRepoOwner,
+					types.URLParamGitRepoName,
+					types.URLParamGitBranch,
+				),
+			},
+			Scopes: []types.PermissionScope{
+				types.UserScope,
+				types.ProjectScope,
+				types.GitInstallationScope,
+			},
+		},
+	)
+
+	getTarballURLHandler := gitinstallation.NewGithubGetTarballURLHandler(
+		config,
+		factory.GetDecoderValidator(),
+		factory.GetResultWriter(),
+	)
+
+	routes = append(routes, &Route{
+		Endpoint: getTarballURLEndpoint,
+		Handler:  getTarballURLHandler,
+		Router:   r,
+	})
+
 	return routes, newPath
 }

api/types/git_installation.go

@@ -60,3 +60,8 @@ type GetProcfileRequest struct {
 }
 
 type GetProcfileResponse map[string]string
+
+type GetTarballURLResponse struct {
+	URLString       string `json:"url"`
+	LatestCommitSHA string `json:"latest_commit_sha"`
+}

docs/developing/backend-refactor-status.md

@@ -56,7 +56,7 @@
 | <li>- [X] `GET /api/projects/{project_id}/gitrepos/{installation_id}/repos/{kind}/{owner}/{name}/{branch}/buildpack/detect` | AB          |                 |             |                  |
 | <li>- [X] `GET /api/projects/{project_id}/gitrepos/{installation_id}/repos/{kind}/{owner}/{name}/{branch}/contents`         | AB          |                 |             |                  |
 | <li>- [X] `GET /api/projects/{project_id}/gitrepos/{installation_id}/repos/{kind}/{owner}/{name}/{branch}/procfile`         | AB          |                 |             |                  |
-| <li>- [ ] `GET /api/projects/{project_id}/gitrepos/{installation_id}/repos/{kind}/{owner}/{name}/{branch}/tarball_url`      |             |                 |             |                  |
+| <li>- [X] `GET /api/projects/{project_id}/gitrepos/{installation_id}/repos/{kind}/{owner}/{name}/{branch}/tarball_url`      | AB          |                 |             |                  |
 | <li>- [ ] `GET /api/projects/{project_id}/helmrepos`                                                                        |             |                 |             |                  |
 | <li>- [ ] `POST /api/projects/{project_id}/helmrepos`                                                                       |             |                 |             |                  |
 | <li>- [ ] `GET /api/projects/{project_id}/helmrepos/{helm_id}/charts`                                                       |             |                 |             |                  |