Meson: add sage cli

pyproject.toml

@@ -85,6 +85,9 @@ R = [
 file = "README.md"
 content-type = "text/markdown"
 
+[project.scripts]
+sage = "sage.cli:main"
+
 [tool.conda-lock]
 platforms = [
     'osx-64', 'linux-64', 'linux-aarch64', 'osx-arm64'

src/sage/cli/__init__.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+
+import argparse
+import logging
+import sys
+
+from sage.cli.interactive_shell_cmd import InteractiveShellCmd
+from sage.cli.options import CliOptions
+from sage.cli.version_cmd import VersionCmd
+
+
+def main() -> int:
+    input_args = sys.argv[1:]
+    parser = argparse.ArgumentParser(
+        prog="sage",
+        description="If no command is given, starts the interactive interpreter where you can enter statements and expressions, immediately execute them and see their results.",
+    )
+    parser.add_argument(
+        "-v",
+        "--verbose",
+        action="store_true",
+        default=False,
+        help="print additional information",
+    )
+
+    VersionCmd.extend_parser(parser)
+
+    if not input_args:
+        InteractiveShellCmd(CliOptions()).run()
+
+    args = parser.parse_args(input_args)
+    options = CliOptions(**vars(args))
+
+    logging.basicConfig(level=logging.DEBUG if options.verbose else logging.INFO)
+
+    return InteractiveShellCmd(options).run()
+
+
+if __name__ == "__main__":
+    sys.exit(main())

src/sage/cli/interactive_shell_cmd.py

@@ -0,0 +1,25 @@
+from sage.cli.options import CliOptions
+
+
+class InteractiveShellCmd:
+    def __init__(self, options: CliOptions):
+        r"""
+        Initialize the command.
+        """
+        self.options = options
+
+    def run(self) -> int:
+        r"""
+        Start the interactive shell.
+        """
+        # Display startup banner. Do this before anything else to give the user
+        # early feedback that Sage is starting.
+        from sage.misc.banner import banner
+
+        banner()
+
+        from sage.repl.interpreter import SageTerminalApp
+
+        app = SageTerminalApp.instance()
+        app.initialize([])
+        return app.start()  # type: ignore

src/sage/cli/meson.build

@@ -0,0 +1,8 @@
+
+py.install_sources(
+  '__init__.py',
+  'interactive_shell_cmd.py',
+  'options.py',
+  'version_cmd.py',
+  subdir: 'sage/cli',
+)

src/sage/cli/options.py

@@ -0,0 +1,13 @@
+from dataclasses import dataclass
+
+
+@dataclass
+class CliOptions:
+    """
+    A TypedDict for command-line interface options.
+
+    Attributes:
+        verbose (bool): Indicates whether verbose output is enabled.
+    """
+
+    verbose: bool = False

src/sage/cli/version_cmd.py

@@ -0,0 +1,25 @@
+import argparse
+
+from sage.version import version
+
+
+class VersionCmd:
+    @staticmethod
+    def extend_parser(parser: argparse.ArgumentParser):
+        r"""
+        Extend the parser with the version command.
+
+        INPUT:
+
+        - ``parsers`` -- the parsers to extend.
+
+        OUTPUT:
+
+        - the extended parser.
+        """
+        parser.add_argument(
+            "--version",
+            action="version",
+            version=version,
+            help="print the version number and exit",
+        )

src/sage/meson.build

@@ -142,3 +142,4 @@ subdir('symbolic')
 subdir('tests')
 subdir('dynamics')
 subdir('sat')
+subdir('cli')

src/sage/misc/banner.py

@@ -27,6 +27,9 @@ def version():
        sage: version()
        'SageMath version ..., Release Date: ...'
     """
+    from sage.misc.superseded import deprecation
+
+    deprecation(1, "Use sage.version instead.")
     return SAGE_VERSION_BANNER