don't do fetchTarball

nix/update-my-projects.mjs

@@ -1,11 +1,28 @@
 import fs from "node:fs/promises";
+import child_process from "node:child_process";
+
+const fetchHash = (url) => {
+  const res = child_process.execFileSync("nix", [
+    "store",
+    "prefetch-file",
+    "--unpack",
+    "--hash-type",
+    "sha256",
+    "--json",
+    url,
+  ]);
+  const out = new TextDecoder().decode(res).trim();
+  const { hash } = JSON.parse(out);
+  return hash;
+};
 
 const path = `${import.meta.dirname}/my-projects.json`;
 const projects = JSON.parse(await fs.readFile(path));
 
 let hasChanges = false;
 
-for (const [name, commit] of Object.entries(projects)) {
+for (const [name, state] of Object.entries(projects)) {
+  const { commit } = state;
   const res = await fetch(
     `https://api.github.com/repos/Noratrieb/${name}/commits/HEAD`
   );
@@ -21,7 +38,18 @@ for (const [name, commit] of Object.entries(projects)) {
     console.log(
       `${name} changed from ${commit} -> ${latestCommit} (${body.commit.message})`
     );
-    projects[name] = latestCommit;
+
+    const url = `https://github.com/Noratrieb/${name}/archive/${latestCommit}.tar.gz`;
+
+    projects[name] = {
+      commit: latestCommit,
+      fetchFromGitHub: {
+        owner: "Noratrieb",
+        repo: name,
+        rev: latestCommit,
+        hash: fetchHash(url),
+      },
+    };
     hasChanges = true;
   }
 }