npm 如何处理锁文件

Question

所以我在npm install xyz另一个 npm 模块的 postinstall npm 钩子调用的脚本中运行。（让我们不要深入探讨为什么，但这与 npm 不支持的可选依赖项有关）

npm install moduleA
  -> installing moduleA
    -> running postinstall hook (my script)
      -> my script runs npm install xyz

当我运行脚本本身时，npm install 运行得相当快，但是当我在 postinstall 挂钩中安装模块时，脚本会等待锁定文件至少 1 分钟。（或者我假设）

当我在 npm 中启用详细日志级别时，我得到如下输出：

[a lot more lines above]
npm verb addNamed "latest" is being treated as a dist-tag for invert-kv
npm info addNameTag [ 'invert-kv', 'latest' ]
npm verb addNameTag registry:https://registry.npmjs.org/invert-kv already in flight; waiting
npm verb addNamed "1.0.0" is a plain semver version for invert-kv
npm verb afterAdd /Users/path/.npm/invert-kv/1.0.0/package/package.json not in flight; writing
npm verb correctMkdir /Users/path/.npm correctMkdir not in flight; initializing
npm verb afterAdd /Users/path/.npm/invert-kv/1.0.0/package/package.json written
npm verb cache add spec camelcase@^3.0.0
npm verb addNamed ">=3.0.0 <4.0.0" is a valid semver range for camelcase
npm verb addNameRange registry:https://registry.npmjs.org/camelcase not in flight; fetching
npm verb get https://registry.npmjs.org/camelcase not expired, no request
npm verb addNamed "3.0.0" is a plain semver version for camelcase
npm verb afterAdd /Users/path/.npm/camelcase/3.0.0/package/package.json not in flight; writing
npm verb correctMkdir /Users/path/.npm correctMkdir not in flight; initializing
npm verb afterAdd /Users/path/.npm/camelcase/3.0.0/package/package.json written
npm verb correctMkdir /Users/path/.npm/_locks correctMkdir not in flight; initializing

在这里等待至少一分钟

npm verb lock using /Users/path/.npm/_locks/staging-d21af557b41d4821.lock for /Users/path/Desktop/t/node_modules/.staging
npm verb unbuild node_modules/.staging/abbrev-ac014442
npm verb unbuild node_modules/.staging/ansi-regex-12e09986
npm verb unbuild node_modules/.staging/ansi-styles-1359ba2f
npm verb unbuild node_modules/.staging/aproba-d9971840
npm verb unbuild node_modules/.staging/array-find-index-c1ddfc4c
[a lot more lines below]

现在查看correctMkdir的代码似乎只是将所有文件加载/Users/path/.npm/_locks到内存中并尝试修复权限？没有把握。

correctMkdir由lock调用。这似乎散列文件和一些加密？也不确定。

逆向工程经过一番NPM代码我提出通过改变配置进取cache-lock-stale，cache-lock-wait为10ms。不幸的是，在正确安装所有内容之前，它仍然挂起太久。我怀疑在更改之前和 npm 正在运行时没有考虑更改的配置？也许？也许这是完全不同的东西？:)

谁能提示我正确的方向？有什么我可以做的事情来加快速度吗？

Answer 1

经过一晚的睡眠后，现在安装速度似乎快了很多。我猜测一些缓存仍然挂在我的 _locks 文件夹中。

所以答案是：

临时设置cache-lock-stale和，npm 不会等待你的锁定文件过期。据我了解，npm 正在尝试等待 _lock 文件夹中的所有锁定文件完成，并且因为我们在 npm install 内运行 npm install ，所以父进程中的锁定文件显然仍在使用中。这更多的是猜测，但我希望它对将来的人有所帮助。cache-lock-wait10ms