Description

Alex Ewerlöf (alexewerlof)

opened on Apr 16, 2017

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Suggestion

I'm using Typedoc which has very similar options to tsc and book keeping and converting these options is tedious and error prone. It would be nice if tsc could dump its effective compiler options (considering the default values, extends rules, etc.) as a json file. This can be particularly useful when debugging the configurations to see what config is effectively being used for the compilation process.

See: TypeStrong/typedoc#480

TypeScript Version: 2.2.1 / nightly (2.2.0-dev.201xxxxx)

Expected behavior:

tsc --effectiveConfig
# Prints out a json object on STDOUT that is ready to be redirected to a JSON file
{
    "compilerOptions": {
        "module": "commonjs",
        "sourceMap": true,
        "target": "es2016",
        "noEmitOnError": true,
        "alwaysStrict": true,
        "importHelpers": true,
        "lib": [
            "es2015"
        ]
        ...
    }
}

Reacted by Aluan Haddad, Derek Christensen, Loïc Coenen, Huafu Gandon, Sviataslau Shchaurouski, Paul Sanchez, Dan Brown, ahagelstein, SlurpTheo, Dmitry Druganov and 3 more

Reacted by vandalouze and Loïc Coenen

Activity

1. Ryan Cavanaugh (RyanCavanaugh)

   added

   Awaiting More FeedbackThis means we'd like to hear from more people who would be helped by this featureThis means we'd like to hear from more people who would be helped by this feature

   SuggestionAn idea for TypeScriptAn idea for TypeScript

   on Apr 17, 2017
2. huafu commented on Jul 6, 2018

   

   Huafu Gandon (huafu)

   on Jul 6, 2018

   More actions

   I was looking for an option on how to output the effective config when I found this. I'm stuck since an hour trying to find out how extends actually extends stuff. I could only find in the docs:

   files, include and exclude from the inheriting config file overwrite those from the base config file.

   All relative paths found in the configuration file will be resolved relative to the configuration file they originated in.

   But nothing about what happens to deeper arrays such as types or typeRoots, ... are they merged? how?

   This is why I'm totally 👍 for something like Jest has with jest --showConfig, but for tsc.
3. Wesley Wigham (weswigham)

   closed this as completedin #27353on Oct 31, 2018

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