Change Shellcheck GitHub action to lint all files at once.

.github/workflows/shellcheck.yml

@@ -1,57 +1,15 @@
----
-# The idea here is to run Shellcheck for each file, so violations can be fixed
-# incrementally. As soon as a file has been fixed to pass shellcheck, it should
-# no longer be allowed to fail.
-#
-# Once all files have been fixed, the jobs can all be replaced by one single run
-# that checks all files at once.
-#
-# For discussion and further details see: https://github.com/bpkg/bpkg/issues/78
-
 on:
   - push
   - pull_request
 
 jobs:
-  allowed_to_fail:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        file:
-          - bpkg.sh
-          - setup.sh
-          - lib/init/init.sh
-          - lib/install/install.sh
-          - lib/json/JSON.sh
-          - lib/suggest/suggest.sh
-    steps:
-      - uses: actions/checkout@v2
-      - uses: pipeline-components/shellcheck@v0.6.1
-        continue-on-error: true
-        with:
-          directory: ${{ matrix.file }}
-          options: -f gcc -x lib/utils/utils.sh
-
-  must_pass:
+  shellcheck:
     runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        file:
-          - lib/getdeps/getdeps.sh
-          - lib/list/list.sh
-          - lib/package/package.sh
-          - lib/show/show.sh
-          - lib/term/term.sh
-          - lib/update/update.sh
-          - lib/utils/utils.sh
-          - lib/env/env.sh
-          - lib/run/run.sh
-          - lib/source/source.sh
     steps:
       - uses: actions/checkout@v2
-      - uses: pipeline-components/shellcheck@v0.6.1
+      - env:
+          PIPELINECOMPONENTS_GLOBASSIST: true
+        uses: pipeline-components/shellcheck@v0.10.0
         with:
-          directory: ${{ matrix.file }}
-          options: -f gcc -x lib/utils/utils.sh
+          directory: "**/*.sh"
+          options: --format=gcc --external-sources