Added scheduled builds and updated to install Swift and use simpler Swift Bazel config for Linux.

.github/workflows/ci.yml

@@ -3,6 +3,9 @@ name: CI for PR Merge
 on:
   pull_request:
     branches: [ main ]
+  schedule:
+    # Every day at 11:14 UTC.
+    - cron: '14 11 * * *'
 
 jobs:
 
@@ -24,21 +27,29 @@ jobs:
     env:
       CC: clang
     steps:
+    - uses: cgrindel/gha_install_swift_on_ubuntu@v1
+      with:
+        swift_release_tag: "swift-5.5.2-RELEASE"
+        ubuntu_version: "20.04"
     - uses: actions/checkout@v2
-    - name: Bazel Config for Linux
+    - name: Update local.bazelrc with Linux Flags
       shell: bash
       run: |
-        # Make sure that the Swift bin directory is first in the PATH. This addresses
-        # the `invalid linker name in argument '-fuse-ld=gold'` error when running
-        # SPM. In short, it allows SPM to find the correct linker.
-        swift_exec=$(which swift)
-        real_swift_exec=$(realpath $swift_exec)
-        real_swift_dir=$(dirname $real_swift_exec)
-        new_path="${real_swift_dir}:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
-        cat >>local.bazelrc <<EOF
-        build --action_env=PATH=${new_path}
+        cat >> "local.bazelrc" <<EOF
+        # Need to expose the PATH so that the Swift toolchain can be found
+        build --action_env=PATH
         EOF
     - uses: cgrindel/gha_set_up_bazel@v1
       with:
         repo_name: rules_spm
     - uses: ./.github/actions/build_and_test
+
+  all_ci_tests:
+    runs-on: ubuntu-20.04
+    needs: [macos_build, ubuntu_build]
+    steps:
+      - name: All is Well
+        shell: bash
+        run: |
+          echo "All is well!"
+

README.md

@@ -1,6 +1,6 @@
 # Swift Package Manager Rules for Bazel
 
-[![Build](https://github.com/cgrindel/rules_spm/actions/workflows/ci.yml/badge.svg)](https://github.com/cgrindel/rules_spm/actions/workflows/ci.yml)
+[![Build](https://github.com/cgrindel/rules_spm/actions/workflows/ci.yml/badge.svg?event=schedule)](https://github.com/cgrindel/rules_spm/actions/workflows/ci.yml)
 
 This repository contains rules for [Bazel](https://bazel.build/) that can be used to download, build
 and consume Swift packages with [rules_swift](https://github.com/bazelbuild/rules_swift) rules.  The