From 388e744ab26588c57fe51ebcf9367cae543be7f6 Mon Sep 17 00:00:00 2001
From: anthony sottile <asottile@umich.edu>
Date: Fri, 24 Jul 2026 16:48:28 -0400
Subject: [PATCH] update nodejs

---
 Dockerfile |  6 +++---
 bin/update | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+), 3 deletions(-)
 create mode 100755 bin/update

diff --git a/Dockerfile b/Dockerfile
index 9bf4719..d6f17dd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -106,12 +106,12 @@ RUN echo 'end: minimal'
 
 FROM minimal AS final
 
-ARG NODE=24.15.0
-ARG NODE_SHA256=44836872d9aec49f1e6b52a9a922872db9a2b02d235a616a5681b6a85fec8d89
+ARG NODE=v24.18.0
+ARG NODE_SHA256=783130984963db7ba9cbd01089eaf2c2efb055c7c1693c943174b967b3050cb8
 ENV PATH=/opt/node/bin:$PATH
 RUN : \
     && echo 'lang: node' \
-    && curl --silent --location --output /tmp/node.tar.gz "https://nodejs.org/dist/v${NODE}/node-v${NODE}-linux-x64.tar.gz" \
+    && curl --silent --location --output /tmp/node.tar.gz "https://nodejs.org/dist/${NODE}/node-${NODE}-linux-x64.tar.gz" \
     && echo "${NODE_SHA256}  /tmp/node.tar.gz" | sha256sum --check \
     && mkdir /opt/node \
     && tar --strip-components 1 --directory /opt/node -xf /tmp/node.tar.gz \
diff --git a/bin/update b/bin/update
new file mode 100755
index 0000000..503a762
--- /dev/null
+++ b/bin/update
@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+from __future__ import annotations
+
+import argparse
+import hashlib
+import json
+import os.path
+import urllib.request
+
+_HERE = os.path.join(os.path.dirname(__file__), '..')
+
+
+def _replace_args(**kwargs: str) -> None:
+    fname = os.path.join(_HERE, 'Dockerfile')
+
+    with open(fname) as f:
+        lines = list(f)
+
+    for i, line in enumerate(lines):
+        if line.startswith('ARG '):
+            before, _, after = line.rstrip().partition('=')
+            varname = before.removeprefix('ARG ')
+            if varname in kwargs:
+                val = kwargs.pop(varname)
+                if after == val:
+                    print(f'{varname}: up to date!')
+                else:
+                    print(f'{varname}: {after} => {val}')
+                    lines[i] = f'ARG {varname}={val}\n'
+
+    if kwargs:
+        raise AssertionError(f'unmatched: {sorted(kwargs)}')
+
+    with open(fname, 'w') as f:
+        f.writelines(lines)
+
+
+def _update_node() -> int:
+    req = urllib.request.urlopen('https://nodejs.org/dist/index.json')
+    resp = json.load(req)
+
+    target = next(d for d in resp if d['lts'])
+    node = target['version']
+
+    url = f'https://nodejs.org/dist/{node}/node-{node}-linux-x64.tar.gz'
+    req = urllib.request.urlopen(url)
+    h = hashlib.file_digest(req, 'sha256')
+
+    _replace_args(NODE=node, NODE_SHA256=h.hexdigest())
+    return 0
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument('target', choices=('node',))
+    args = parser.parse_args()
+
+    return {'node': _update_node}[args.target]()
+
+
+if __name__ == '__main__':
+    raise SystemExit(main())