ci: run canary tests in matrix one job per lib

Take a stab at running each canary lib test as a GitHub Action job.

If this works, it should run canary tests in parallel, which is nice.

But the real benefit will be able to rerun a single failed canary lib
that has flaked out on CI rather than having to rerun them all.

Author: lread

.github/workflows/libs-test.yml

@@ -3,8 +3,32 @@ name: Libs Test
 on: [push, pull_request]
 
 jobs:
+  enumerate-libs:
+    runs-on: ubuntu-latest
+
+    outputs:
+      libs: ${{ steps.set-libs.outputs.libs }}
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Install babashka
+      uses: turtlequeue/[email protected]
+      with:
+        babashka-version: 0.8.1
+
+    - id: set-libs
+      name: Set libs var for matrix
+      ## call bb script directly instead of as task to avoid task status output
+      run: echo "::set-output name=libs::$(bb script/test_libs.clj list --format=json)"
+
   libs-test:
+    needs: enumerate-libs
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        lib: ${{fromJSON(needs.enumerate-libs.outputs.libs)}}
 
     steps:
     - uses: actions/checkout@v3
@@ -36,7 +60,7 @@ jobs:
     - name: Install babashka
       uses: turtlequeue/[email protected]
       with:
-        babashka-version: 0.7.8
+        babashka-version: 0.8.1
 
     - name: Install Clojure
       run: curl -s https://download.clojure.org/install/linux-install-1.10.3.986.sh | sudo bash
@@ -55,4 +79,4 @@ jobs:
         planck --version
 
     - name: Run Libs Tests
-      run: bb test-libs run
+      run: bb test-libs run $${ matrix.lib }

script/test_libs.clj

@@ -509,7 +509,7 @@
                        0 1))))))
 
 (def args-usage "Valid args:
-  list
+  list [--format=json]
   run [<lib-name>...]
   outdated [<lib-name>...]
   --help
@@ -528,7 +528,9 @@ Specifying no lib-names selects all libraries.")
   (when-let [opts (main/doc-arg-opt args-usage args)]
     (cond
       (get opts "list")
-      (status/line :detail (str "available libs: " (string/join " " (map :name libs))))
+      (if (= "json" (get opts "--format"))
+        (status/line :detail (->> libs (map :name) json/generate-string))
+        (status/line :detail (str "available libs: " (string/join " " (map :name libs)))))
 
       :else
       (let [lib-names (get opts "<lib-name>")