Initial commit

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-11-05 23:07:59 +07:00
commit f65d10e998
377 changed files with 31301 additions and 0 deletions
@@ -0,0 +1,45 @@
+import {cp, copyFile, lstat, mkdir, readdir, realpath, symlink} from 'node:fs/promises';
+import {dirname, join, relative, sep} from 'node:path';
+
+export const under=(path,base)=>path===base||path.startsWith(base+sep);
+
+/**
+ * Copy a release tree for npm or pnpm layouts.
+ * In-tree symlinks are rewritten as relative links inside `to` so the package is relocatable.
+ * Symlinks that escape `from` but stay under `root` are materialized; anything else is rejected.
+ */
+export async function copyReleaseTree(from,to,{root=from,filter=async()=>true}={}) {
+  from=await realpath(from);
+  root=await realpath(root);
+  async function walk(srcDir,destDir) {
+    await mkdir(destDir,{recursive:true});
+    for(const entry of await readdir(srcDir,{withFileTypes:true})) {
+      const srcPath=join(srcDir,entry.name);
+      if(!await filter(srcPath))continue;
+      const destPath=join(destDir,entry.name);
+      if(entry.isSymbolicLink()){
+        const target=await realpath(srcPath).catch(()=>null);
+        if(!target||(!under(target,from)&&!under(target,root)))
+          throw new Error(`Release source contains a symbolic link: ${srcPath}`);
+        if(under(target,from)){
+          const mapped=join(to,relative(from,target));
+          await symlink(relative(dirname(destPath),mapped),destPath);
+          continue;
+        }
+        await cp(target,destPath,{recursive:true,dereference:true,filter});
+        continue;
+      }
+      if(entry.isDirectory()){
+        await walk(srcPath,destPath);
+        continue;
+      }
+      if(entry.isFile()){
+        await copyFile(srcPath,destPath);
+        continue;
+      }
+      // Rare non-file entries (sockets/devices) should never ship.
+      throw new Error(`Release source contains an unsupported file type: ${srcPath}`);
+    }
+  }
+  await walk(from,to);
+}