How to use "mergeWithRules " merge multilevel configuration

[23cicada]

I want to merge the "modules " under the a and b files.

const a = {
  module: {
    rules: [
      {
        test: /\.(sa|sc|c)ss/,
        use: [
          {
            loader: 'css-loader',
            options: {
              importLoaders: 2,
              modules: { auto: true },
            }
          }
        ]
      }
    ]
  }
}

const b = {
  module: {
    rules: [
      {
        test: /\.(sa|sc|c)ss/,
        use: [
          {
            loader: 'css-loader',
            options: {
              modules: {
                localIdentName: '[hash:base64]'
              }
            }
          }
        ]
      }
    ]
  }
}

const mergeRules = mergeWithRules({
  module: {
    rules: {
      test: CustomizeRule.Match,
      use: {
        loader: CustomizeRule.Match,
        options: {
          modules: CustomizeRule.Append
        }
      }
    }
  }
})(a, b)

result:

{
  "module":
  {
    "rules":
    [
      {
        "test": {},
        "use": [
          {
            "loader": "css-loader",
            "options": {
              "importLoaders": 2,
              "modules": {"auto": true}
            }
          }
        ]
      }
    ]
  }
}

I don't think that's allowed. Is there another way?

[bebraw]

Yeah, I see. It looks like I'll have to add a bit of extra code to support this use case. Thanks for bringing this up.

[23cicada]

Yeah, I see. It looks like I'll have to add a bit of extra code to support this use case. Thanks for bringing this up.

I don't know if such a multi-level merger is in order.

[bebraw]

@23cicada I mean, I need to add a bit of extra logic to cover for this use case. When I've done that, then your proposed configuration should work. 👍

[23cicada]

@23cicada I mean, I need to add a bit of extra logic to cover for this use case. When I've done that, then your proposed configuration should work. 👍

Okay, thank you. Should I close this issue?

[bebraw]

@23cicada Nope, please keep it open and I'll close once it works.

[bebraw]

@23cicada It looks like this works as a side effect of the work on #151 and #159. I added a test to verify.

If you are using 5.5.0 or newer, it should work as you expect.