feat: Support creating repo with custom properties (#3933)

Author: mrecachinas

github/repos.go

@@ -501,21 +501,22 @@ type createRepoRequest struct {
 	// Creating an organization repository. Required for non-owners.
 	TeamID *int64 `json:"team_id,omitempty"`
 
-	AutoInit                  *bool   `json:"auto_init,omitempty"`
-	GitignoreTemplate         *string `json:"gitignore_template,omitempty"`
-	LicenseTemplate           *string `json:"license_template,omitempty"`
-	AllowSquashMerge          *bool   `json:"allow_squash_merge,omitempty"`
-	AllowMergeCommit          *bool   `json:"allow_merge_commit,omitempty"`
-	AllowRebaseMerge          *bool   `json:"allow_rebase_merge,omitempty"`
-	AllowUpdateBranch         *bool   `json:"allow_update_branch,omitempty"`
-	AllowAutoMerge            *bool   `json:"allow_auto_merge,omitempty"`
-	AllowForking              *bool   `json:"allow_forking,omitempty"`
-	DeleteBranchOnMerge       *bool   `json:"delete_branch_on_merge,omitempty"`
-	UseSquashPRTitleAsDefault *bool   `json:"use_squash_pr_title_as_default,omitempty"`
-	SquashMergeCommitTitle    *string `json:"squash_merge_commit_title,omitempty"`
-	SquashMergeCommitMessage  *string `json:"squash_merge_commit_message,omitempty"`
-	MergeCommitTitle          *string `json:"merge_commit_title,omitempty"`
-	MergeCommitMessage        *string `json:"merge_commit_message,omitempty"`
+	AutoInit                  *bool          `json:"auto_init,omitempty"`
+	GitignoreTemplate         *string        `json:"gitignore_template,omitempty"`
+	LicenseTemplate           *string        `json:"license_template,omitempty"`
+	AllowSquashMerge          *bool          `json:"allow_squash_merge,omitempty"`
+	AllowMergeCommit          *bool          `json:"allow_merge_commit,omitempty"`
+	AllowRebaseMerge          *bool          `json:"allow_rebase_merge,omitempty"`
+	AllowUpdateBranch         *bool          `json:"allow_update_branch,omitempty"`
+	AllowAutoMerge            *bool          `json:"allow_auto_merge,omitempty"`
+	AllowForking              *bool          `json:"allow_forking,omitempty"`
+	DeleteBranchOnMerge       *bool          `json:"delete_branch_on_merge,omitempty"`
+	UseSquashPRTitleAsDefault *bool          `json:"use_squash_pr_title_as_default,omitempty"`
+	SquashMergeCommitTitle    *string        `json:"squash_merge_commit_title,omitempty"`
+	SquashMergeCommitMessage  *string        `json:"squash_merge_commit_message,omitempty"`
+	MergeCommitTitle          *string        `json:"merge_commit_title,omitempty"`
+	MergeCommitMessage        *string        `json:"merge_commit_message,omitempty"`
+	CustomProperties          map[string]any `json:"custom_properties,omitempty"`
 }
 
 // Create a new repository. If an organization is specified, the new
@@ -575,6 +576,7 @@ func (s *RepositoriesService) Create(ctx context.Context, org string, repo *Repo
 		SquashMergeCommitMessage:  repo.SquashMergeCommitMessage,
 		MergeCommitTitle:          repo.MergeCommitTitle,
 		MergeCommitMessage:        repo.MergeCommitMessage,
+		CustomProperties:          repo.CustomProperties,
 	}
 
 	req, err := s.client.NewRequest("POST", u, repoReq)

github/repos_test.go

@@ -308,6 +308,53 @@ func TestRepositoriesService_Create_org(t *testing.T) {
 	}
 }
 
+func TestRepositoriesService_Create_withCustomProperties(t *testing.T) {
+	t.Parallel()
+	client, mux, _ := setup(t)
+
+	input := &Repository{
+		Name: Ptr("n"),
+		CustomProperties: map[string]any{
+			"environment": "production",
+			"team":        "backend",
+			"priority":    1,
+		},
+	}
+
+	wantAcceptHeaders := []string{mediaTypeRepositoryTemplatePreview, mediaTypeRepositoryVisibilityPreview}
+	mux.HandleFunc("/orgs/o/repos", func(w http.ResponseWriter, r *http.Request) {
+		v := new(createRepoRequest)
+		assertNilError(t, json.NewDecoder(r.Body).Decode(v))
+
+		testMethod(t, r, "POST")
+		testHeader(t, r, "Accept", strings.Join(wantAcceptHeaders, ", "))
+		want := &createRepoRequest{
+			Name: Ptr("n"),
+			CustomProperties: map[string]any{
+				"environment": "production",
+				"team":        "backend",
+				"priority":    float64(1), // JSON unmarshals numbers as float64
+			},
+		}
+		if !cmp.Equal(v, want) {
+			t.Errorf("Request body = %+v, want %+v", v, want)
+		}
+
+		fmt.Fprint(w, `{"id":1}`)
+	})
+
+	ctx := t.Context()
+	repo, _, err := client.Repositories.Create(ctx, "o", input)
+	if err != nil {
+		t.Errorf("Repositories.Create returned error: %v", err)
+	}
+
+	want := &Repository{ID: Ptr(int64(1))}
+	if !cmp.Equal(repo, want) {
+		t.Errorf("Repositories.Create returned %+v, want %+v", repo, want)
+	}
+}
+
 func TestRepositoriesService_CreateFromTemplate(t *testing.T) {
 	t.Parallel()
 	client, mux, _ := setup(t)