[BUG] Dry run reporting unpretty files when all files match styles

[davwheat]

What exactly happened?
When performing a dry run, Prettier reports that all files match the code style, but this action reports unpretty files.

See: https://github.com/flarumite/simple-spoilers/runs/1731327132#step:4:19

How did it look?

[creyD]

Pretty weird, sorry I wasn't able to investigate, will take a couple of days more. Do you have an idea what causes this? Maybe git changes the newline chars or something? There must be some kind of change.

[davwheat]

Honestly I have no clue.

Prettier outputs that it all matches, then the action reports a failure.

I ended up switching to my own action in the end.

[fsz-codeshop]

Hi guys! Maybe it is caused by this block on entry point?

  if $INPUT_DRY; then
    echo "Prettier found unpretty files!"
    exit 1
  else

[creyD]

@fsz-codeshop Can you please test it with the new push in dev? I tried your fix a couple of times now and it doesn't seem to work (https://github.com/creyD/prettier_test/runs/2313102123)

[fsz-codeshop]

Hi @creyD, you are indeed right. It is not working with the dev branch. I am getting:

Error:  No parser and no file path given, couldn't infer a parser.

I have forked and worked on top of the main branch for that dry-run fix.
Nevertheless, I have also checked out the last commit on dev before merging my changes and I am still getting the same error (87e1553). When using fsz-codeshop/prettier_action@issue-37-dry-run-reporting-unpretty I get it working as expected:

Installing prettier...
/usr/local/bin/prettier -> /usr/local/lib/node_modules/prettier/bin-prettier.js
+ prettier@2.2.1
added 1 package from 1 contributor in 0.627s
Prettifying files...
Files:
Checking formatting...
[warn] .github/PULL_REQUEST_TEMPLATE.md
[warn] docs/CONTRIBUTING.md
[warn] index.js
[warn] README.md
[warn] test.js
[warn] Code style issues found in the above file(s). Forgot to run Prettier?
Problem running prettier with --check --ignore-path ./.prettierignore --config ./prettier.config.js **/*.{js,ts,md}
Nothing to commit. Exiting.

Maybe it is something else of the other changes?

[fsz-codeshop]

Furthermore, checking the provided link (https://github.com/creyD/prettier_test/runs/2313102123) it seems that it worked as expected

No unpretty files! Finishing dry-run.

Did I miss something?

[creyD]

Furthermore, checking the provided link (https://github.com/creyD/prettier_test/runs/2313102123) it seems that it worked as expected

No unpretty files! Finishing dry-run.

Did I miss something?

It states that it worked, but there was a unpretty file and it even showed it in the "Files:" statement.

[fsz-codeshop]

Ok. I think I got it.
The logic only works when using --check configuration because of the prettier command status code

Anyway, I reopened the PR (#49) with the change of the logic to handle the cases using --write + dry-run and --check + dry-run.

I have forked the prettier_test and ran some tests and it seems it is working as expected now. If you can check it =)