Write result to a file

.gitignore

@@ -1,2 +1,3 @@
 .idea/
 .env
+changelog.json

changelog/generate.go

@@ -90,6 +90,7 @@ func (clg *ChangelogGenerator) Generate(ctx context.Context) (changelog *output.
 				Name:        release.Name,
 				Component:   repository,
 				Description: release.Description,
+				Date:        release.CreatedAt,
 			}
 			slog.Info("Adding entry", "tag", entry.Tag, "name", entry.Name, "component", entry.Component, "description.len", len(entry.Description))
 			changelog.AddEntry(entry)

changelog/output/format.go

@@ -103,6 +103,7 @@ func (c *Changelog) AddEntry(entry Entry) error {
 				Name:        entry.Component,
 				Title:       entry.Name,
 				Description: entry.Description,
+				Date:        entry.Date,
 			})
 			break
 		}

config/config.go

@@ -18,13 +18,16 @@ const (
 	keyRepositoriesEnvironment = "REPOSITORIES"
 	keyOrganization            = "organization"
 	keyOrganizationEnvironment = "ORGANIZATION"
+	keyOutputFile              = "output-file"
+	keyOutputFileEnvironment   = "OUTPUT_FILE"
 )
 
 type Config struct {
 	Verbose      *int
 	GithubToken  string
 	Repositories string
 	Organization string
+	OutputFile   string
 }
 
 func New() (*Config, error) {
@@ -33,6 +36,7 @@ func New() (*Config, error) {
 	flag.StringVar(&c.GithubToken, keyGithubToken, lookupEnvOrString(keyGithubTokenEnvironment, ""), "The GitHub Token to use for authentication.")
 	flag.StringVar(&c.Repositories, keyRepositories, lookupEnvOrString(keyRepositoriesEnvironment, ""), "The repositories to generate changelog for.")
 	flag.StringVar(&c.Organization, keyOrganization, lookupEnvOrString(keyOrganizationEnvironment, ""), "The organization to generate changelog for.")
+	flag.StringVar(&c.OutputFile, keyOutputFile, lookupEnvOrString(keyOutputFileEnvironment, ""), "The output file to write the changelog to.")
 	flag.Parse()
 
 	level := slog.LevelError
@@ -62,6 +66,10 @@ func New() (*Config, error) {
 		return nil, fmt.Errorf("missing required environment variable: %s", keyOrganization)
 	}
 
+	if c.OutputFile == "" {
+		return nil, fmt.Errorf("missing required environment variable: %s", keyOutputFile)
+	}
+
 	return &c, nil
 }
 

main.go

@@ -41,9 +41,10 @@ func main() {
 		os.Exit(1)
 	}
 
-	_, err = os.Stdout.Write(output)
+	// write changelog to file
+	err = os.WriteFile(c.OutputFile, output, 0644)
 	if err != nil {
-		slog.Error("unable to write changelog", "error", err)
+		slog.Error("unable to write changelog to file", "error", err)
 		os.Exit(1)
 	}
 }