80ch

Provide linking information to Js_of_ocaml in .cmj and .cmja #3443

	name: 80ch
	on:
	push:
	branches:
	- main
	pull_request:
	types: [opened, synchronize, reopened, labeled, unlabeled]
	jobs:
	build:
	if: ${{ ! contains( github.event.pull_request.labels.*.name, 'skip 80ch') }}

	runs-on: ${{ matrix.os }}

	strategy:
	matrix:
	os: [ubuntu-latest]
	ocaml-compiler:
	- "4.14.0"

	steps:
	- name: Checkout the OxCaml repo
	uses: actions/checkout@master

	- name: Checkout the parent branch
	run: git fetch origin HEAD --deepen 1

	- name: Setup OCaml ${{ matrix.ocaml-compiler }}
	uses: ocaml/setup-ocaml@v3
	with:
	ocaml-compiler: ${{ matrix.ocaml-compiler }}

	- name: Install a recent version of re
	run: opam install 're>=1.10.0'

	- name: Install ocamlformat 0.24.1
	run: opam pin -y ocamlformat 0.24.1

	- name: Check for new >80 character lines
	run: opam exec -- bash .github/workflows/80ch.sh

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