feat(init): allow multiple author options

docs/cli.md

@@ -465,9 +465,9 @@ poetry init
 
 * `--name`: Name of the package.
 * `--description`: Description of the package.
-* `--author`: Author of the package.
+* `--author`: Author of the package. Can be specified multiple times.
 * `--python` Compatible Python versions.
-* `--dependency`: Package to require with a version constraint. Should be in format `foo:1.0.0`.
+* `--dependency`: Package to require with a version constraint. Should be in the format `foo:1.0.0`.
 * `--dev-dependency`: Development requirements, see `--dependency`.
 
 ## install
@@ -717,9 +717,9 @@ my-package
   keep the [recommendations for a PyPI-friendly README](https://packaging.python.org/en/latest/guides/making-a-pypi-friendly-readme/)
   in mind.
 * `--description`: Description of the package.
-* `--author`: Author of the package.
+* `--author`: Author of the package. Can be specified multiple times.
 * `--python` Compatible Python versions.
-* `--dependency`: Package to require with a version constraint. Should be in format `foo:1.0.0`.
+* `--dependency`: Package to require with a version constraint. Should be in the format `foo:1.0.0`.
 * `--dev-dependency`: Development requirements, see `--dependency`.
 
 ## publish

src/poetry/console/commands/init.py

@@ -39,7 +39,13 @@ class InitCommand(Command):
     options: ClassVar[list[Option]] = [
         option("name", None, "Name of the package.", flag=False),
         option("description", None, "Description of the package.", flag=False),
-        option("author", None, "Author name of the package.", flag=False),
+        option(
+            "author",
+            None,
+            "Author name of the package. Can be specified multiple times.",
+            flag=False,
+            multiple=True,
+        ),
         option("python", None, "Compatible Python versions.", flag=False),
         option(
             "dependency",
@@ -148,21 +154,28 @@ def _init_pyproject(
         if not description and is_interactive:
             description = self.ask(self.create_question("Description []: ", default=""))
 
-        author = self.option("author")
-        if not author and vcs_config.get("user.name"):
-            author = vcs_config["user.name"]
+        provided_authors = self.option("author")
+        default_author = provided_authors[0] if provided_authors else None
+        if not default_author and vcs_config.get("user.name"):
+            default_author = vcs_config["user.name"]
             author_email = vcs_config.get("user.email")
             if author_email:
-                author += f" <{author_email}>"
+                default_author += f" <{author_email}>"
 
-        if is_interactive:
+        if is_interactive and len(provided_authors) < 2:
             question = self.create_question(
-                f"Author [<comment>{author}</comment>, n to skip]: ", default=author
+                f"Author [<comment>{default_author}</comment>, n to skip]: ",
+                default=default_author,
             )
-            question.set_validator(lambda v: self._validate_author(v, author))
-            author = self.ask(question)
-
-        authors = [author] if author else []
+            question.set_validator(
+                lambda v: self._validate_author(v, default_author or "")
+            )
+            selected_author = self.ask(question)
+            authors = [selected_author] if selected_author else []
+        else:
+            authors = list(provided_authors) if provided_authors else []
+            if not authors and default_author:
+                authors = [default_author]
 
         license_name = self.option("license")
         if not license_name and is_interactive:
@@ -237,7 +250,7 @@ def _init_pyproject(
             name,
             version,
             description=description,
-            author=authors[0] if authors else None,
+            authors=authors or None,
             readme_format=readme_format,
             license=license_name,
             python=python,

src/poetry/layouts/layout.py

@@ -20,6 +20,7 @@
 
 if TYPE_CHECKING:
     from collections.abc import Mapping
+    from collections.abc import Sequence
 
     from tomlkit.items import InlineTable
     from tomlkit.toml_document import TOMLDocument
@@ -66,6 +67,7 @@ def __init__(
         description: str = "",
         readme_format: str = "md",
         author: str | None = None,
+        authors: Sequence[str] | None = None,
         license: str | None = None,
         python: str | None = None,
         dependencies: Mapping[str, str | Mapping[str, Any]] | None = None,
@@ -86,10 +88,9 @@ def __init__(
         self._dependencies = dependencies or {}
         self._dev_dependencies = dev_dependencies or {}
 
-        if not author:
-            author = "Your Name <you@example.com>"
-
-        self._author = author
+        self._authors = list(authors or ([author] if author else []))
+        if not self._authors:
+            self._authors = ["Your Name <you@example.com>"]
 
     @property
     def basedir(self) -> Path:
@@ -147,15 +148,16 @@ def generate_project_content(
         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")}
+        for author in self._authors:
+            m = AUTHOR_REGEX.match(author)
+            if m is None:
+                # This should not happen because authors are validated before.
+                raise ValueError(f"Invalid author: {author}")
+
+            author_content = {"name": m.group("name")}
             if email := m.group("email"):
-                author["email"] = email
-            project_content["authors"].append(author)
+                author_content["email"] = email
+            project_content["authors"].append(author_content)
 
         if self._license:
             project_content["license"] = self._license

tests/console/commands/test_init.py

@@ -17,6 +17,7 @@
 from poetry.console.application import Application
 from poetry.console.commands.init import InitCommand
 from poetry.repositories import RepositoryPool
+from poetry.toml import TOMLFile
 from tests.helpers import get_package
 
 
@@ -879,6 +880,24 @@ def test_predefined_all_options(tester: CommandTester, repo: DummyRepository) ->
     assert expected in output
 
 
+def test_noninteractive_multiple_authors(
+    tester: CommandTester, source_dir: Path
+) -> None:
+    tester.execute(
+        "--name my-package "
+        "--author 'Foo Bar <foo@example.com>' "
+        "--author 'Baz Qux <baz@example.com>'",
+        interactive=False,
+    )
+
+    pyproject_file = source_dir / "pyproject.toml"
+    authors = TOMLFile(pyproject_file).read()["project"]["authors"]
+    assert [dict(author) for author in authors] == [
+        {"name": "Foo Bar", "email": "foo@example.com"},
+        {"name": "Baz Qux", "email": "baz@example.com"},
+    ]
+
+
 def test_add_package_with_extras_and_whitespace(tester: CommandTester) -> None:
     command = tester.command
     assert isinstance(command, InitCommand)

tests/console/commands/test_new.py

@@ -10,6 +10,7 @@
 from poetry.core.utils.helpers import module_name
 
 from poetry.factory import Factory
+from poetry.toml import TOMLFile
 
 
 if TYPE_CHECKING:
@@ -199,6 +200,23 @@ def test_command_new_with_readme(
     assert project_section["readme"] == readme_file.name
 
 
+def test_command_new_multiple_authors(tester: CommandTester, tmp_path: Path) -> None:
+    path = tmp_path / "package"
+
+    tester.execute(
+        "--author 'Foo Bar <foo@example.com>' "
+        "--author 'Baz Qux <baz@example.com>' "
+        f"{path.as_posix()}"
+    )
+
+    pyproject_file = path / "pyproject.toml"
+    authors = TOMLFile(pyproject_file).read()["project"]["authors"]
+    assert [dict(author) for author in authors] == [
+        {"name": "Foo Bar", "email": "foo@example.com"},
+        {"name": "Baz Qux", "email": "baz@example.com"},
+    ]
+
+
 @pytest.mark.parametrize(
     ["use_poetry_python", "python"],
     [