pantsbuild / pants / 25443604553

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100.0
/src/python/pants/backend/typescript/subsystem.py
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# Copyright 2025 Pants project contributors (see CONTRIBUTORS.md).
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# Licensed under the Apache License, Version 2.0 (see LICENSE).
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from __future__ import annotations




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import logging




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from pants.backend.javascript.subsystems.nodejs_tool import NodeJSToolBase




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from pants.option.option_types import SkipOption, StrListOption




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from pants.util.strutil import softwrap




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logger = logging.getLogger(__name__)




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class TypeScriptSubsystem(NodeJSToolBase):




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    options_scope = "typescript"




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    name = "TypeScript"




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    help = """TypeScript type checker (tsc)."""




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    # TypeScript always uses resolve-based execution because it needs access to project










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    # dependencies for type checking. The resolve is determined dynamically in check.py.










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    # This default version is never used - TypeScript must come from project package.json.











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    default_version = "typescript@FROM_PACKAGE_JSON"




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    skip = SkipOption("check")




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    extra_build_args = StrListOption(




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        default=[],










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        help=(










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            "Extra arguments to pass to tsc when running in --build mode. "










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            "These args are added to the base command 'tsc --build'. "










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            "Commonly used: --verbose, --force, --dry."










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        ),










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    )










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    def __init__(self, *args, **kwargs):




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        super().__init__(*args, **kwargs)




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        if self.version != "typescript@FROM_PACKAGE_JSON":




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            logger.warning(




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                softwrap(f"""










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                    You set --typescript-version={self.version}. This setting is ignored because










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                    TypeScript always uses the version from your project's package.json dependencies










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                    or devDependencies. Please ensure TypeScript is listed in your package.json.










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                """)










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            )










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        self._binary_name_override = "tsc"




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    @property




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    def binary_name(self) -> str:




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        """The binary name to run for this tool."""











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        return self._binary_name_override or super().binary_name




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