wip

pre_commit/tools/node.py

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+from __future__ import annotations
+
+import functools
+import json
+
+from pre_commit.prefix import Prefix
+from pre_commit.request import fetch
+
+RESOLVABLE = ('latest', 'lts')
+
+
+@functools.cache
+def _node_versions() -> dict[str, str]:
+    resp = fetch('https://nodejs.org/download/release/index.json')
+    contents = json.load(resp)
+
+    ret = {'latest': contents[0]['version']}
+    for dct in contents:
+        if dct['lts']:
+            ret['lts'] = dct['version']
+            break
+    else:
+        raise AssertionError('unreachable')
+
+    return ret
+
+
+def resolve(version: str) -> str:
+    return _node_versions()[version]
+
+
+@functools.cache
+def _target_platform() -> str:
+    # to support:
+    # linux-arm64, linux-ppc64le, linux-s390x, linux-x64
+    # osx-arm64-tar, osx-x86-tar
+    # win-arm64-zip, win-x64-zip
+    # or fallback to `src` ?
+    raise NotImplementedError
+
+
+def install(prefix: Prefix, version: str) -> None:
+    # TODO: download and extract to prefix
+    raise NotImplementedError
+
+
+def health_check(prefix: Prefix, version: str) -> str | None:
+    # TODO: previously checked `node --version`
+    # TODO: but maybe just check that the installed os/arch is correct?
+    return None