add support for PEP 621: poetry init and poetry new (#9135)

src/poetry/console/commands/init.py

@@ -105,8 +105,8 @@ def _init_pyproject(
         if pyproject.file.exists():
             if pyproject.is_poetry_project():
                 self.line_error(
-                    "<error>A pyproject.toml file with a poetry section already"
-                    " exists.</error>"
+                    "<error>A pyproject.toml file with a project and/or"
+                    " a poetry section already exists.</error>"
                 )
                 return 1
 
@@ -255,7 +255,7 @@ def _init_pyproject(
         if create_layout:
             layout_.create(project_path, with_pyproject=False)
 
-        content = layout_.generate_poetry_content()
+        content = layout_.generate_project_content()
         for section, item in content.items():
             pyproject.data.append(section, item)
 

src/poetry/layouts/layout.py

@@ -5,12 +5,14 @@
 from typing import Any
 
 from packaging.utils import canonicalize_name
+from poetry.core.packages.package import AUTHOR_REGEX
 from poetry.core.utils.helpers import module_name
 from tomlkit import inline_table
 from tomlkit import loads
 from tomlkit import table
 from tomlkit.toml_document import TOMLDocument
 
+from poetry.factory import Factory
 from poetry.pyproject.toml import PyProjectTOML
 
 
@@ -21,16 +23,20 @@
 
 
 POETRY_DEFAULT = """\
-[tool.poetry]
+[project]
 name = ""
 version = ""
 description = ""
-authors = []
-license = ""
+authors = [
+]
+license = {}
 readme = ""
-packages = []
+requires-python = ""
+dependencies = [
+]
 
-[tool.poetry.dependencies]
+[tool.poetry]
+packages = []
 
 [tool.poetry.group.dev.dependencies]
 """
@@ -48,7 +54,7 @@ def __init__(
         readme_format: str = "md",
         author: str | None = None,
         license: str | None = None,
-        python: str = "*",
+        python: str | None = None,
         dependencies: Mapping[str, str | Mapping[str, Any]] | None = None,
         dev_dependencies: Mapping[str, str | Mapping[str, Any]] | None = None,
     ) -> None:
@@ -117,34 +123,49 @@ def create(
         if with_pyproject:
             self._write_poetry(path)
 
-    def generate_poetry_content(self) -> TOMLDocument:
+    def generate_project_content(self) -> TOMLDocument:
         template = POETRY_DEFAULT
 
         content: dict[str, Any] = loads(template)
 
-        poetry_content = content["tool"]["poetry"]
-        poetry_content["name"] = self._project
-        poetry_content["version"] = self._version
-        poetry_content["description"] = self._description
-        poetry_content["authors"].append(self._author)
+        project_content = content["project"]
+        project_content["name"] = self._project
+        project_content["version"] = self._version
+        project_content["description"] = self._description
+        m = AUTHOR_REGEX.match(self._author)
+        if m is None:
+            # This should not happen because author has been validated before.
+            raise ValueError(f"Invalid author: {self._author}")
+        else:
+            author = {"name": m.group("name")}
+            if email := m.group("email"):
+                author["email"] = email
+            project_content["authors"].append(author)
 
         if self._license:
-            poetry_content["license"] = self._license
+            project_content["license"]["text"] = self._license
+        else:
+            project_content.remove("license")
+
+        project_content["readme"] = f"README.{self._readme_format}"
+
+        if self._python:
+            project_content["requires-python"] = self._python
         else:
-            poetry_content.remove("license")
+            project_content.remove("requires-python")
+
+        for dep_name, dep_constraint in self._dependencies.items():
+            dependency = Factory.create_dependency(dep_name, dep_constraint)
+            project_content["dependencies"].append(dependency.to_pep_508())
+
+        poetry_content = content["tool"]["poetry"]
 
-        poetry_content["readme"] = f"README.{self._readme_format}"
         packages = self.get_package_include()
         if packages:
             poetry_content["packages"].append(packages)
         else:
             poetry_content.remove("packages")
 
-        poetry_content["dependencies"]["python"] = self._python
-
-        for dep_name, dep_constraint in self._dependencies.items():
-            poetry_content["dependencies"][dep_name] = dep_constraint
-
         if self._dev_dependencies:
             for dep_name, dep_constraint in self._dev_dependencies.items():
                 poetry_content["group"]["dev"]["dependencies"][dep_name] = (
@@ -153,6 +174,9 @@ def generate_poetry_content(self) -> TOMLDocument:
         else:
             del poetry_content["group"]
 
+        if not poetry_content:
+            del content["tool"]["poetry"]
+
         # Add build system
         build_system = table()
         build_system_version = ""
@@ -194,7 +218,7 @@ def _create_tests(path: Path) -> None:
 
     def _write_poetry(self, path: Path) -> None:
         pyproject = PyProjectTOML(path / "pyproject.toml")
-        content = self.generate_poetry_content()
+        content = self.generate_project_content()
         for section, item in content.items():
             pyproject.data.append(section, item)
         pyproject.save()

tests/console/commands/conftest.py

@@ -12,7 +12,7 @@ def init_basic_inputs() -> str:
             "This is a description",  # Description
             "n",  # Author
             "MIT",  # License
-            "~2.7 || ^3.6",  # Python
+            ">=3.6",  # Python
             "n",  # Interactive packages
             "n",  # Interactive dev packages
             "\n",  # Generate
@@ -23,14 +23,14 @@ def init_basic_inputs() -> str:
 @pytest.fixture()
 def init_basic_toml() -> str:
     return """\
-[tool.poetry]
+[project]
 name = "my-package"
 version = "1.2.3"
 description = "This is a description"
-authors = ["Your Name <[email protected]>"]
-license = "MIT"
+authors = [
+    {name = "Your Name",email = "[email protected]"}
+]
+license = {text = "MIT"}
 readme = "README.md"
-
-[tool.poetry.dependencies]
-python = "~2.7 || ^3.6"
+requires-python = ">=3.6"
 """