chore: tweak azure-pipelines.yml

[ikatyang]

• add missing AST_COMPARE
• test on Node 4/10

---

• I’ve added tests to confirm my change works.
• (If changing the API or CLI) I’ve documented the changes I’ve made (in the docs/ directory)
• I’ve read the contributing guidelines.

✨Try the playground for this PR✨

[j-f1]

Can you move the new files to a .azure-pipelines directory?

[kachkaev]

Can there be two azure pipelines with tests? One with git config --global core.autocrlf true (checks out files with CRLF by default) and git config --global core.autocrlf false (checks out files as is).

If the repo’s gtattributes are configured correctly, that should not affect tests as all files will be checked out equally regardless of the global setting.

[j-f1]

Netlify is segfaulting :/

[ikatyang]

@kachkaev I'd like to use eol=lf in #5494 and add another test flag TEST_CRLF to test CRLF by replacing LF with CRLF before formatting. We shouldn't need to configure global settings and we should be able to test CRLF locally even if it's on LF system (via TEST_CRLF).

@j-f1 It looks like a random error, I've rebuilt it and it's green now.

I'm going to merge this PR now since it's only for tweaking the current settings, CRLF should be handled in #5494.

[kachkaev]

We shouldn't need to configure global settings and we should be able to test CRLF locally even if it's on LF system (via TEST_CRLF).

Testing on Windows machines with globally configured CRLF and LF in git is what I meant. This can be useful because Windows folks have different preferencess and all of them should be able to contribute to Prettier without problems of running local tests. By default, git’s core.autocrlf is true, but some devs set it to false, e.g. create-react-app contribution guidelines recommend doing so.

I did not know Azure pipelines had a flag for CRLF, interesting!

[kachkaev]

Running tests on a Windows machine with LF ia different than doing this on Linux, because on Windows os.EOL is CRLF regardless of how git is configured. Some modules refer to this value and this can affect what Prettier generates in the end.

[ikatyang]

@kachkaev Can you move your comments to #5494? It should be the better place for CRLF discussion.

[ikatyang]

(TEST_CRLF is a new flag I added in our run_spec.js. 😅)