npm主包执行npm install时本地模块依赖未自动安装的问题

Hey there, let's break this down into two parts for you:

When you use a file: path in your package.json dependencies, npm doesn't treat this like a regular published npm package—here's why:

• By default, npm just creates a symlink (or copies the module files, depending on your npm version) to your local module. It assumes you, as the developer of the local module, have already set up its dependencies separately.
• This is intentional behavior: local file: dependencies are meant for development workflows where you're actively working on both the main project and the local module, so npm doesn't overwrite or interfere with the local module's own node_modules or setup.

Fixes to auto-install the local module's dependencies #

If you want npm to handle the local module's dependencies during the main project's npm install, try these options:

1. Use the --install-links flag (npm 7+)
   Run this command in your main project:

   npm install --install-links
   

   This tells npm to install the dependencies of any linked/local file: dependencies into your main project's node_modules.
2. Package your local module as a tarball
   In your local module directory, run:

   npm pack
   

   This creates a .tgz file of your module. Update your main project's package.json to point to this tarball instead of the file: path:

   { "dependencies": { "local_module": "../path/to/local_module-1.0.0.tgz" } }
   

   When you run npm install in the main project, npm will treat this like a regular published package and install all its dependencies automatically.
3. Pre-install dependencies in the local module (the standard workflow)
   While it's an extra step, this is the most common approach for local module development:
   • First run npm install in your local module directory to set up its dependencies
   • Then run npm install in your main project to link the module

Stack Overflow's community tends to downvote questions that don't align with its guidelines. Here are the most likely reasons in your case:

• Combining multiple unrelated questions: You asked two separate things—one about npm dependency behavior, and another about why your question was downvoted. Stack Overflow expects one question per post; mixing them makes the post less focused and less useful for future readers.
• Not fully documenting prior research: Even if you found old/unreliable answers, it's helpful to mention what you tried from those posts and why they didn't work. This shows you've done your due diligence before asking.
• Missing context details: While your npm config snippet is good, adding details like your npm version, operating system, or any silent errors (even if there were none) could have made the question more actionable for responders.

To improve future questions:

• Stick to one specific problem per post
• Include all relevant details (versions, environment, steps you've already tried)
• Reference existing answers you've checked and explain why they didn't solve your issue

内容的提问来源于stack exchange，提问作者DutchKevv