Missing gray-matter dependency in @vuepress/shared-utils

[jdoubleu]

• I confirm that this is a issue rather than a question.

Bug report

I am using the @vuepress/markdown-loader package in another project.
This package requires @vuepress/shared-utils.

The parseFrontmatter.ts file requires the gray-matter module which is not present in the package.json of @vuepress/shared-utils.

Version

$ npm list | grep -2  @vuepress/markdown-loader
└─┬ @vuepress/markdown-loader@1.0.0-alpha.0
  ├─┬ @vuepress/markdown@1.0.0-alpha.0
  │ ├─┬ @vuepress/shared-utils@1.0.0-alpha.0

Steps to reproduce

1. Create a package that requires @vuepress/markdown-loader (e.g. npm install @vuepress/markdown-loader)
2. Install webpack: npm install webpack webpack-cli
3. Add a Markdown file (e.g. Example.md)
4. Configure webpack to use the markdown file as entry and the the markdown-loader to compile it:

const path = require('path')

module.exports = {
    entry: path.resolve(__dirname, 'Example.md'),
    output: {
        path: path.resolve(__dirname, 'dist'),
        filename: 'file.js'
    },
    module: {
        rules: [
            {
                test: /\.md$/,
                use: [
                    {
                        loader: require.resolve('@vuepress/markdown-loader'),
                        options: {
                            sourceDir: path.resolve('chapters')
                        }
                    }
                ]
            }
        ]
    }
}

5. Run webpack

What is expected?

The markdown loader compiles all Markdown files.

What is actually happening?

Webpack throws the following warnings:

WARNING in ./Example.md
Module build failed (from ../@vuepress/markdown-loader/index.js):
Error: Cannot find module 'gray-matter'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:603:15)
    at Function.Module._load (internal/modules/cjs/loader.js:529:25)
    at Module.require (internal/modules/cjs/loader.js:657:17)
    at require (/path/to/project/node_modules/v8-compile-cache/v8-compile-cache.js:159:20)
    at parseFrontmatter (/path/to/project/node_modules/@vuepress/shared-utils/lib/parseFrontmatter.js:2:18)
    at Object.module.exports (/path/to/project/node_modules/@vuepress/markdown-loader/index.js:41:23)
 @ ./ sync nonrecursive \.md$ ./Example.md
 @ ./index.js

Other relevant information

• Your OS: macOS
• Node.js version: v11.6.0
• Browser version: n/a
• Is this a global or local install? local
• Which package manager did you use for the install? npm

[jdoubleu]

Seems like semver is missing, too.

...
Error: Cannot find module 'semver'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:603:15)
    at Function.Module._load (internal/modules/cjs/loader.js:529:25)
    at Module.require (internal/modules/cjs/loader.js:657:17)
    at require (/path/to/project/node_modules/v8-compile-cache/v8-compile-cache.js:159:20)
    at Object.<anonymous> (/path/to/project/node_modules/@vuepress/shared-utils/lib/module.js:3:16)
...

(cc @ulivz )

[ulivz]

@jdoubleu Thanks, fixed at 1161507, it will be out at next alpha version, for now you can install it temporarily.