CI: Add a CI job that runs JET tests

.github/workflows/ci.yml

@@ -15,6 +15,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}-${{ github.ref != 'refs/heads/main' || startsWith(github.ref, 'refs/heads/release-') || github.run_number }}
   cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
 
+permissions:
+  contents: read
+
 jobs:
   test:
     name: julia -t${{ matrix.threads}} - ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
@@ -40,6 +43,8 @@ jobs:
             arch: x86
     steps:
       - uses: actions/checkout@v6
+        with:
+            persist-credentials: false
       - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
@@ -59,6 +64,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
+        with:
+            persist-credentials: false
       - uses: julia-actions/setup-julia@latest
         with:
           # version: '1.6'
@@ -70,3 +77,18 @@ jobs:
           julia --project=docs --color=yes docs/make.jl pdf
         env:
           DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }}
+
+  jet:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+        with:
+            persist-credentials: false
+      - uses: julia-actions/setup-julia@latest
+        with:
+          version: '1'
+          # version: 'nightly'
+      - uses: julia-actions/cache@v2
+      - run: julia --color=yes --project=ci/jet -e 'import Pkg; Pkg.instantiate()'
+      - name: Run the JET tests
+        run: julia --color=yes -t4 --project=ci/jet ci/jet/check.jl

ci/jet/Project.toml

@@ -0,0 +1,8 @@
+[deps]
+Distributed = "8ba89e20-285c-5b6f-9357-94700520ee1b"
+JET = "c3a54625-cd67-489e-a8e7-0a5a0ff4e31b"
+Serialization = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
+Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+
+[sources]
+Distributed = {path = "../.."}

ci/jet/check.jl

@@ -0,0 +1,20 @@
+using Distributed: Distributed
+
+using JET: JET
+using Serialization: Serialization
+using Test: Test, @testset
+
+# We don't want to fail PkgEval because of a JET failure
+# Therefore, we don't put the JET tests in the regular Distributed test suite
+# Instead, we put it in a separate CI job, which runs on the Distributed repo
+
+@testset "JET" begin
+    ignored_modules = (
+        # We will ignore Base:
+        Base,
+
+        # We'll ignore the Serialization stdlib:
+        Serialization,
+    )
+    JET.test_package(Distributed; ignored_modules)
+end