Merge pull request #11 from thomasf/add-features

Add features for #9 and #10

DOCS.md

@@ -3,7 +3,9 @@ can override the default configuration with the following parameters:
 
 * `api_key` - GitHub oauth token with public_repo or repo permission
 * `files` - Files to upload to GitHub Release, globs are allowed
+* `file_exists` - What to do if an file asset already exists, supported values: **overwrite** (default), **skip** and **fail**
 * `checksum` - Checksum takes hash methods to include in your GitHub release for the files specified. Supported hash methods include md5, sha1, sha256, sha512, adler32, and crc32.
+* `draft` - create a draft release if set to true
 * `base_url` - GitHub base URL, only required for GHE
 * `upload_url` - GitHub upload URL, only required for GHE
 

main.go

@@ -37,6 +37,13 @@ func main() {
 		os.Exit(0)
 	}
 
+	if vargs.FileExists == "" {
+		vargs.FileExists = "overwrite"
+	}
+	if !fileExistsValues[vargs.FileExists] {
+		fmt.Printf("invalid value for file_exists: use [empty], overwrite, skip or fail")
+	}
+
 	if vargs.BaseURL == "" {
 		vargs.BaseURL = "https://api.github.com/"
 	} else if !strings.HasSuffix(vargs.BaseURL, "/") {
@@ -98,22 +105,47 @@ func main() {
 	client.BaseURL = baseURL
 	client.UploadURL = uploadURL
 
-	release, err := buildRelease(client, repo.Owner, repo.Name, filepath.Base(build.Ref))
+	rc := releaseClient{
+		Client: client,
+		Owner:  repo.Owner,
+		Repo:   repo.Name,
+		Tag:    filepath.Base(build.Ref),
+		Draft:  vargs.Draft,
+		FileExists: vargs.FileExists,
+	}
+
+	release, err := rc.buildRelease()
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)
 	}
 
-	if err := uploadFiles(client, repo.Owner, repo.Name, *release.ID, files); err != nil {
+	if err := rc.uploadFiles(*release.ID, files); err != nil {
 		fmt.Println(err)
 		os.Exit(1)
 	}
 }
 
-func buildRelease(client *github.Client, owner string, repo string, tag string) (*github.RepositoryRelease, error) {
+var fileExistsValues = map[string]bool{
+	"overwrite": true,
+	"fail":      true,
+	"skip":      true,
+}
+
+// Release holds ties the drone env data and github client together.
+type releaseClient struct {
+	*github.Client
+	Owner      string
+	Repo       string
+	Tag        string
+	Draft      bool
+	FileExists string
+}
+
+func (rc *releaseClient) buildRelease() (*github.RepositoryRelease, error) {
 
 	// first attempt to get a release by that tag
-	release, err := getRelease(client, owner, repo, tag)
+	release, err := rc.getRelease()
 	if err != nil && release == nil {
 		fmt.Println(err)
 	} else if release != nil {
@@ -121,7 +153,7 @@ func buildRelease(client *github.Client, owner string, repo string, tag string)
 	}
 
 	// if no release was found by that tag, create a new one
-	release, err = newRelease(client, owner, repo, tag)
+	release, err = rc.newRelease()
 	if err != nil {
 		return nil, fmt.Errorf("Failed to retrieve or create a release: %s", err)
 	}
@@ -129,34 +161,58 @@ func buildRelease(client *github.Client, owner string, repo string, tag string)
 	return release, nil
 }
 
-func getRelease(client *github.Client, owner string, repo string, tag string) (*github.RepositoryRelease, error) {
-	release, _, err := client.Repositories.GetReleaseByTag(owner, repo, tag)
+func (rc *releaseClient) getRelease() (*github.RepositoryRelease, error) {
+	release, _, err := rc.Client.Repositories.GetReleaseByTag(rc.Owner, rc.Repo, rc.Tag)
 	if err != nil {
-		return nil, fmt.Errorf("Release %s not found", tag)
+		return nil, fmt.Errorf("Release %s not found", rc.Tag)
 	}
 
-	fmt.Printf("Successfully retrieved %s release\n", tag)
+	fmt.Printf("Successfully retrieved %s release\n", rc.Tag)
 	return release, nil
 }
 
-func newRelease(client *github.Client, owner string, repo string, tag string) (*github.RepositoryRelease, error) {
-	rr := &github.RepositoryRelease{TagName: github.String(tag)}
-	release, _, err := client.Repositories.CreateRelease(owner, repo, rr)
+func (rc *releaseClient) newRelease() (*github.RepositoryRelease, error) {
+	rr := &github.RepositoryRelease{
+		TagName: github.String(rc.Tag),
+		Draft:   &rc.Draft,
+	}
+	release, _, err := rc.Client.Repositories.CreateRelease(rc.Owner, rc.Repo, rr)
 	if err != nil {
 		return nil, fmt.Errorf("Failed to create release: %s", err)
 	}
 
-	fmt.Printf("Successfully created %s release\n", tag)
+	fmt.Printf("Successfully created %s release\n", rc.Tag)
 	return release, nil
 }
 
-func uploadFiles(client *github.Client, owner string, repo string, id int, files []string) error {
-	assets, _, err := client.Repositories.ListReleaseAssets(owner, repo, id, &github.ListOptions{})
+func (rc *releaseClient) uploadFiles(id int, files []string) error {
+	assets, _, err := rc.Client.Repositories.ListReleaseAssets(rc.Owner, rc.Repo, id, &github.ListOptions{})
 	if err != nil {
 		return fmt.Errorf("Failed to fetch existing assets: %s", err)
 	}
 
+	var uploadFiles []string
+files:
 	for _, file := range files {
+		for _, asset := range assets {
+			if *asset.Name == path.Base(file) {
+				switch rc.FileExists {
+				case "overwrite":
+					// do nothing
+				case "fail":
+					return fmt.Errorf("Asset file %s already exists", path.Base(file))
+				case "skip":
+					fmt.Printf("Skipping pre-existing %s artifact\n", *asset.Name)
+					continue files
+				default:
+					return fmt.Errorf("Internal error, unkown file_exist value %s", rc.FileExists)
+				}
+			}
+		}
+		uploadFiles = append(uploadFiles, file)
+	}
+
+	for _, file := range uploadFiles {
 		handle, err := os.Open(file)
 		if err != nil {
 			return fmt.Errorf("Failed to read %s artifact: %s", file, err)
@@ -164,7 +220,7 @@ func uploadFiles(client *github.Client, owner string, repo string, id int, files
 
 		for _, asset := range assets {
 			if *asset.Name == path.Base(file) {
-				if _, err := client.Repositories.DeleteReleaseAsset(owner, repo, *asset.ID); err != nil {
+				if _, err := rc.Client.Repositories.DeleteReleaseAsset(rc.Owner, rc.Repo, *asset.ID); err != nil {
 					return fmt.Errorf("Failed to delete %s artifact: %s", file, err)
 				}
 				fmt.Printf("Successfully deleted old %s artifact\n", *asset.Name)
@@ -172,7 +228,7 @@ func uploadFiles(client *github.Client, owner string, repo string, id int, files
 		}
 
 		uo := &github.UploadOptions{Name: path.Base(file)}
-		if _, _, err = client.Repositories.UploadReleaseAsset(owner, repo, id, uo, handle); err != nil {
+		if _, _, err = rc.Client.Repositories.UploadReleaseAsset(rc.Owner, rc.Repo, id, uo, handle); err != nil {
 			return fmt.Errorf("Failed to upload %s artifact: %s", file, err)
 		}
 

types.go

@@ -4,9 +4,11 @@ import "github.com/drone/drone-go/drone"
 
 // Params are the parameters that the GitHub Release plugin can parse.
 type Params struct {
-	BaseURL   string            `json:"base_url"`
-	UploadURL string            `json:"upload_url"`
-	APIKey    string            `json:"api_key"`
-	Files     drone.StringSlice `json:"files"`
-	Checksum  drone.StringSlice `json:"checksum"`
+	BaseURL    string            `json:"base_url"`
+	UploadURL  string            `json:"upload_url"`
+	APIKey     string            `json:"api_key"`
+	Files      drone.StringSlice `json:"files"`
+	Checksum   drone.StringSlice `json:"checksum"`
+	Draft      bool              `json:"draft"`
+	FileExists string            `json:"file_exists"`
 }