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Add showConfig tsc flag for debugging configs #27353
Add showConfig tsc flag for debugging configs #27353
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Ping @sheetalkamat - would be nice to get this reviewed, too; |
@@ -132,6 +132,11 @@ namespace ts { | |||
const commandLineOptions = commandLine.options; | |||
if (configFileName) { | |||
const configParseResult = parseConfigFileWithSystem(configFileName, commandLineOptions, sys, reportDiagnostic)!; // TODO: GH#18217 | |||
if (commandLineOptions.showConfig) { |
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Interesting. Should we intentionally be ignoring this in --b mode? Should it error when invoked without tsconfig file?
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I think it could be fine without a config file - serves as a fine way to convert a response file or other command line args to a tsconfig.
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Afaik it is ignored in -b
mode; iirc that bails out way early on in the command line parser, since it has its own subset of args.
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I think we could have this even in --b just like how we have eg (list files, list emitted files) could be good information I think. Especially in verbose mode?
@sheetalkamat I've updated this to support showing a config when there's no config file, but didn't enable it in |
I tried to use this today but ran into a couple of issues. The first one's simple The second is that the PR doesn't appear to implement the feature as requested in #15213. I could be using it incorrectly, but my output only shows |
Hmm, as is it contains everything less some things that are implied defaults/equivalent to their defaults. I suppose in that respect it makes more of a minimal config. But not doing that would be... Unfortunate. Because then we'd have to list every option. And there's a lot of options. |
It's true, but that's exactly what I want to see. I'm not sure how else to easily discover what those defaults actually are. I could be off base here, but it looks to me like the documentation for tsconfig.json shows the implied default, but not the resolved one. I might want to extend something that has implied default values when unset, like |
tsc --init prints with a ton of commented out defaults and help text. |
Fixes #15213
I happened to be in the area today, saw the issue while looking through something else, and though it'd actually be a somewhat useful utility to have.