simplifications

src/poetry_plugin_export/exporter.py

@@ -98,17 +98,9 @@ def _export_requirements_txt(self, cwd: Path, output: IO | str) -> None:
         ops = solver.solve().calculate_operations()
         packages = sorted((op.package for op in ops), key=lambda pkg: pkg.name)
 
-        # Get project dependencies.
-        if self._groups is not None:
-            root_package = self._poetry.package.with_dependency_groups(
-                list(self._groups), only=True
-            )
-        else:
-            root_package = self._poetry.package.without_optional_dependency_groups()
-
         for dependency_package in self._poetry.locker.get_project_dependency_packages(
-            project_requires=root_package.all_requires,
-            project_python_marker=root_package.python_marker,
+            project_requires=root.all_requires,
+            project_python_marker=root.python_marker,
             dev=True,
             extras=self._extras,
         ):
@@ -162,11 +154,9 @@ def _export_requirements_txt(self, cwd: Path, output: IO | str) -> None:
 
                     hashes.append(f"{algorithm}:{h}")
 
-                if hashes:
-                    line += " \\\n"
-                    for i, h in enumerate(hashes):
-                        suffix = " \\\n" if i < len(hashes) - 1 else ""
-                        line += f"    --hash={h}{suffix}"
+                for h in hashes:
+                    line += f" \\\n    --hash={h}"
+
             dependency_lines.add(line)
 
         content += "\n".join(sorted(dependency_lines))