npm如何处理锁文件

Question

所以我运行ning npm install xyz 在一个脚本中，该脚本由另一个 npm 模块的安装后 npm 挂钩调用。（我们不要讨论为什么，但它与 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 安装运行相当快，但是当我在安装后挂钩中安装模块时，脚本等待锁定文件至少 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]

现在看correctMkdir的代码好像是把/Users/path/.npm/_locks里面的所有文件都加载到内存里试试修复权限？不确定。

correctMkdir 被 lock 调用。这似乎对文件进行了散列和一些加密？也不确定。

在对一些 npm 代码进行逆向工程后，我通过将 cache-lock-stale、cache-lock-wait 的配置更改为 10ms 取得了进展。不幸的是，在正确安装所有内容之前它仍然挂起太久。我怀疑在之前更改并且 npm 正在运行时没有考虑更改的配置？可能是？也许这是完全不同的东西？ :)

谁能告诉我正确的方向？我可以做些什么来加快速度吗？

Answer 1

经过一夜的睡眠，现在安装速度似乎快多了。我猜某些缓存仍然挂在我的 _locks 文件夹中。

所以答案是：

暂时将 cache-lock-stale 和 cache-lock-wait 设置为 10ms，npm 不会等待您的锁定文件过期。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，因为我们在 npm install 中运行 npm install，父进程的锁定文件显然仍在使用中。这更像是一个猜测，但我希望它能帮助将来的人。

npm如何处理锁文件

How does npm handle lock files

node.js

npm

post-install

npm-install