refactor: use struct directly instead of constructor function

more dsl-ish

cmd/generate.go

@@ -75,17 +75,17 @@ gh jira-changelog generate --config="<path-to-config-file>.yaml" --from="v0.1.0"
 			populator, err = messages.NewCommitPopulator(fromRef, toRef)
 		}
 
-		changelog := jira_changelog.NewGenerator(
-			jira.NewClient(jira.NewClientOptions(jira.Options{
+		changelog := jira_changelog.Generator{
+			Client: jira.NewClient(jira.NewClientOptions(jira.Options{
 				jira.BaseURL:  viper.GetString("base_url"),
 				jira.ApiToken: viper.GetString("api_token"),
 				jira.User:     viper.GetString("email_id"),
 			})),
-			populator,
-			fromRef,
-			toRef,
-			repoURL,
-		)
+			Populator: populator,
+			FromRef:   fromRef,
+			ToRef:     toRef,
+			RepoURL:   repoURL,
+		}
 
 		slog.Info("Generating changelog", "From", fromRef, "To", toRef, "repoURL", repoURL)
 		changelog.Generate(ctx).Render(writer(writeTo))

pkg/jira_changelog/generator.go

@@ -10,27 +10,15 @@ import (
 )
 
 type Generator struct {
-	fromRef   string
-	toRef     string
-	repoURL   string
-	client    jira.Client
-	populator messages.Populator
-}
-
-func NewGenerator(client jira.Client, populator messages.Populator, fromRef, toRef, repoURL string) *Generator {
-	g := &Generator{
-		fromRef:   fromRef,
-		toRef:     toRef,
-		repoURL:   repoURL,
-		client:    client,
-		populator: populator,
-	}
-
-	return g
+	FromRef   string
+	ToRef     string
+	RepoURL   string
+	Client    jira.Client
+	Populator messages.Populator
 }
 
 func (c *Generator) Generate(ctx context.Context) *Changelog {
-	commits, err := c.populator.Populate(ctx)
+	commits, err := c.Populator.Populate(ctx)
 	panicIfErr(err)
 
 	issues, err := c.fetchJiraIssues(commits)
@@ -40,7 +28,7 @@ func (c *Generator) Generate(ctx context.Context) *Changelog {
 
 	slog.Debug("Total epics", "count", len(issuesByEpic))
 
-	return NewChangelog(c.fromRef, c.toRef, c.repoURL, issuesByEpic)
+	return NewChangelog(c.FromRef, c.ToRef, c.RepoURL, issuesByEpic)
 }
 
 func (c *Generator) fetchJiraIssues(commits []messages.Messager) ([]jira.Issue, error) {
@@ -67,7 +55,7 @@ func (c *Generator) fetchJiraIssue(commit messages.Messager) (jira.Issue, error)
 		return jira.NewIssue("", commit.Message(), "done", ""), nil
 	}
 
-	issue, err := c.client.FetchIssue(string(issueId))
+	issue, err := c.Client.FetchIssue(string(issueId))
 	if err != nil {
 		slog.Warn("failed to fetch jira issue", "commit", commit)
 		return jira.NewIssue("", commit.Message(), "done", ""), nil

pkg/jira_changelog/generator_test.go

@@ -35,8 +35,8 @@ func TestFetchJiraIssues(t *testing.T) {
 	mockedClient.On("FetchIssue", "TEST-4546").Return(want[1], nil).Twice()
 	mockedClient.On("FetchIssue", "TEST-12345").Return(want[2], nil)
 
-	generator := NewGenerator(jira.NewClient(jira.NewClientOptions(nil)), &messages.NoopPopulator{}, "fromRef", "toRef", "http://example-repo.com")
-	generator.client = mockedClient
+	generator := Generator{}
+	generator.Client = mockedClient
 
 	changeMessages := lo.Map(commits, func(commit messages.Commit, i int) messages.Messager { return commit })
 	got, err := generator.fetchJiraIssues(changeMessages)