100 lines
3.9 KiB
TypeScript
100 lines
3.9 KiB
TypeScript
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// FUSE-backed filesystems (e.g. Android's SDCARD in Termux) do not support
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// hard links and fail linkat with EACCES or EPERM instead of EXDEV. The
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// hardlink install backend must fall back to copying files, like it already
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// does for EXDEV. https://github.com/oven-sh/bun/issues/36852
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import { describe, expect, test } from "bun:test";
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import { bunEnv, bunExe, isLinux, isMusl, tempDir } from "harness";
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import { cpSync, statSync } from "node:fs";
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import { join } from "node:path";
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const cc = Bun.which("cc") || Bun.which("gcc") || Bun.which("clang");
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const shimC = (errno: string) => /* c */ `
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#define _GNU_SOURCE
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#include <errno.h>
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int linkat(int olddirfd, const char *oldpath, int newdirfd, const char *newpath,
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int flags) {
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(void)olddirfd; (void)oldpath; (void)newdirfd; (void)newpath; (void)flags;
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errno = ${errno};
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return -1;
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}
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int link(const char *oldpath, const char *newpath) {
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(void)oldpath; (void)newpath;
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errno = ${errno};
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return -1;
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}
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`;
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// bun-musl is statically linked, so LD_PRELOAD cannot intercept linkat.
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describe.skipIf(!isLinux || isMusl || !cc)("hardlink backend falls back to copyfile", () => {
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for (const errno of ["EACCES", "EPERM"]) {
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for (const linker of ["hoisted", "isolated"]) {
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test.concurrent(`linkat fails with ${errno}, ${linker} linker`, async () => {
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using dir = tempDir(`hardlink-${errno}-${linker}`, {
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"shim.c": shimC(errno),
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"package.json": JSON.stringify({
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name: "hardlink-fallback-test",
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dependencies: { bar: "file:./bar-0.0.2.tgz", localdep: "file:./localdep" },
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}),
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"localdep/package.json": JSON.stringify({ name: "localdep", version: "1.2.3" }),
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"localdep/index.js": "module.exports = 1;",
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});
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cpSync(join(import.meta.dir, "bar-0.0.2.tgz"), join(String(dir), "bar-0.0.2.tgz"));
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{
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await using compile = Bun.spawn({
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cmd: [cc!, "-shared", "-fPIC", "-o", "shim.so", "shim.c"],
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cwd: String(dir),
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env: bunEnv,
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stdout: "pipe",
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stderr: "pipe",
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});
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const [compileOut, compileErr, compileExit] = await Promise.all([
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compile.stdout.text(),
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compile.stderr.text(),
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compile.exited,
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]);
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if (compileExit !== 0) {
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throw new Error(`shim compile failed: ${compileOut}${compileErr}`);
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}
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}
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await using proc = Bun.spawn({
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cmd: [bunExe(), "install", "--backend", "hardlink", "--linker", linker],
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cwd: String(dir),
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env: {
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...bunEnv,
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BUN_INSTALL_CACHE_DIR: join(String(dir), "cache"),
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LD_PRELOAD: [join(String(dir), "shim.so"), bunEnv.LD_PRELOAD].filter(Boolean).join(":"),
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},
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stderr: "pipe",
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});
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const [stdout, stderr, exitCode] = await Promise.all([proc.stdout.text(), proc.stderr.text(), proc.exited]);
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expect(stderr).not.toContain(errno);
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expect(stdout).toMatch(/\d+ packages? installed/);
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expect(exitCode).toBe(0);
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const installed = join(String(dir), "node_modules", "bar", "package.json");
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expect(await Bun.file(installed).json()).toMatchObject({
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name: "bar",
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version: "0.0.2",
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});
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// A hardlink from the cache would have nlink >= 2; nlink === 1 proves
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// the copy fallback ran.
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expect(statSync(installed).nlink).toBe(1);
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// Folder dependencies take a separate path in the isolated linker
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// that reuses the folder's dir fd across the hardlink attempt and
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// the copy fallback; the contents must still be installed.
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const installedLocal = join(String(dir), "node_modules", "localdep", "package.json");
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expect(await Bun.file(installedLocal).json()).toMatchObject({
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name: "localdep",
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version: "1.2.3",
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});
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expect(statSync(installedLocal).nlink).toBe(1);
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});
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}
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}
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});
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