[Feature]: Support loaderContext._module.issuer

[luhc228]

What problem does this feature solve?

To align Webpack loader context.

What does the proposed API of configuration look like?

// loader.js
export default function loader(loaderContext, content) {
  console.log(loaderContext._module.issuer)
}

[hardfist]

@luhc228 can you add more usage context about this api?

[luhc228]

@luhc228 can you add more usage context about this api?

Yes.

In my implement, I want to get the entry of current module because I need to collect some information about the entry. For example:

const entryInfo = new Map()

// loader.js
export default function loader(loaderContext, content) {
  // get info, for example
  const __HAS_COMPONENT__ = content.includes('components: {}')
 
  // get the entry module
  const entryModule = getEntryModule(loaderContext._module)
  
  // collect
  entryInfo.set(entryModule.name, { __HAS_COMPONENT__ })  
} 

function getEntryModule(_module) {
  if (!_module.issuer) {
    return _module
  }
  
 return getEntryModule(_module.issuer)
}

[hardfist]

since a module can be imported by multi entries, I'm not sure you can get entryModule by issuer this way?

[hardfist]

you may need module-graph api to find all the entrypoint contains the specfic module and you may need to do it in plugin other than loader

 {
      /**
       * 
       * @param {import('webpack').Compiler} compiler 
       */
      apply(compiler){

        compiler.hooks.done.tap('s', (stats) => {
          const entries = [];
          stats.compilation.entrypoints.forEach(entry => {
            entry.chunks.forEach(chunk => {
              chunk.getModules().forEach(m =>{
                 if(m.identifier() == your_module.identifier()){
                          entries.push(entry);
                 }
              })
            })
          })
        })
      }
    }

[luhc228]

you may need module-graph api to find all the entrypoint contains the specfic module and you may need to do it in plugin other than loader

Thanks for your advices! It seems that I don't need the loaderContext._module.issuer now.

[hardfist]

close since it is not needed now