Feature request: add warning for missing compilers

[kbarendrecht]

Context

We use mise to manage our dev env and have a monorepo. We added dependency-cruiser to our setup and ran it. We were under the assumption that ✔ no dependency violations found meant there weren't any violations. But we were wrong! It turned out that dependency-cruiser needs a typescript compiler in the same folder as where it is installed. This behaviour is fine, but it could be made more apparant.

Expected Behavior

It would be nice if it could at least show a warning if it finds files it can handle, but doesn't have a compiler for them. for example:

Warning: Typescript files found, but missing compiler
@see https://github.com/sverweij/dependency-cruiser/blob/main/doc/faq.md#q-typescript-coffeescript-livescript-or-vue-single-file-component-sfc-dependencies-dont-show-up-how-can-i-fix-that

Current Behavior

It just shows ✔ no dependency violations found

Possible Solution

Considered alternatives

[sverweij]

Hi @kbarendrecht thanks for the suggestion. Warning about a mismatch between files found and available compilers is a good idea. It'd probably go in initialisation functionality (--init command line option) as that is the only spot where dependency-cruiser sees all files in the repository. Everywhere else it often doesn't even see files with extensions it doesn't have a compiler or transpiler for.

[kbarendrecht]

Hi @sverweij, we didnt use the --init arg but just copied a base from the docs. As I saw your comment here. Maybe the check can be something simple like spawning a find . -type f -printf '%f\n' | sed -n 's/.*\.//p' | sort -u ?
(finds all extensions in a folder, very fast, sub 100ms OMM). It could be cached as well, no need to run it every time i guess.

[github-actions]

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