feat(tools): dir_list

internal/gitea/files.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"net/url"
 )
 
 type FileContents struct {
@@ -150,6 +151,36 @@ func (c *Client) GetBranchProtection(ctx context.Context, owner, repo, branch st
 	return &bp, nil
 }
 
+type DirEntry struct {
+	Name string `json:"name"`
+	Path string `json:"path"`
+	Type string `json:"type"`
+	Sha  string `json:"sha"`
+	Size int64  `json:"size"`
+}
+
+func (c *Client) ListContents(ctx context.Context, owner, repo, path, ref string) ([]DirEntry, error) {
+	p := fmt.Sprintf("/api/v1/repos/%s/%s/contents/%s", owner, repo, path)
+	if ref != "" {
+		p += "?ref=" + url.QueryEscape(ref)
+	}
+	body, status, err := c.GetJSON(ctx, p)
+	if err != nil {
+		return nil, err
+	}
+	if err := MapStatus(status, body); err != nil {
+		return nil, err
+	}
+	if len(body) > 0 && body[0] == '{' {
+		return nil, fmt.Errorf("path is a file, not a directory — use file_read: %w", ErrValidation)
+	}
+	var entries []DirEntry
+	if err := json.Unmarshal(body, &entries); err != nil {
+		return nil, err
+	}
+	return entries, nil
+}
+
 // UpsertFile creates a file when args.Sha is empty (POST) or updates an existing
 // file when args.Sha is set (PUT). Gitea routes both operations by HTTP method on
 // the same /contents/{path} URL, and rejects PUT without a sha.

internal/gitea/files_test.go

@@ -198,3 +198,38 @@ func TestGetBranchProtectionNotFoundReturnsUnprotected(t *testing.T) {
 	require.NoError(t, err)
 	assert.False(t, bp.Protected)
 }
+
+func TestListContentsDirectory(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		assert.Equal(t, "/api/v1/repos/o/r/contents/src", r.URL.Path)
+		assert.Equal(t, "main", r.URL.Query().Get("ref"))
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write([]byte(`[
+			{"name":"main.go","path":"src/main.go","type":"file","sha":"abc","size":100},
+			{"name":"lib","path":"src/lib","type":"dir","sha":"def","size":0}
+		]`))
+	}))
+	defer srv.Close()
+
+	c := gitea.NewClient(srv.URL, "tok")
+	entries, err := c.ListContents(context.Background(), "o", "r", "src", "main")
+	require.NoError(t, err)
+	require.Len(t, entries, 2)
+	assert.Equal(t, "main.go", entries[0].Name)
+	assert.Equal(t, "file", entries[0].Type)
+	assert.Equal(t, "lib", entries[1].Name)
+	assert.Equal(t, "dir", entries[1].Type)
+}
+
+func TestListContentsOnFileReturnsError(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write([]byte(`{"path":"main.go","sha":"abc","size":100,"content":"","encoding":"base64"}`))
+	}))
+	defer srv.Close()
+
+	c := gitea.NewClient(srv.URL, "tok")
+	_, err := c.ListContents(context.Background(), "o", "r", "main.go", "")
+	require.Error(t, err)
+	assert.ErrorIs(t, err, gitea.ErrValidation)
+}