Simplified dialyzer caches

Removed elixir file caches and projects directory (which doesn't exist
any more).

We do update this cache on every run. The thinking here is to minimize
the changes in the PLT by keeping more of our updated code in the plts.

Author: scohen

.github/workflows/elixir.yml

@@ -78,9 +78,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Run Dialyzer
     env:
-      project_mix_lock: ${{ format('{0}{1}', github.workspace, '/mix.lock') }}
-      projects_ex_blob: ${{ format('{0}{1}', github.workspace, '/projects/**/*.ex') }}
-      projects_locks_blob: ${{ format('{0}{1}', github.workspace, '/projects/*/mix.lock') }}
+      apps_mix_lock: ${{ format('{0}{1}', github.workspace, 'apps/**/mix.lock') }}
       MIX_ENV: dev
     steps:
       # Step: Setup Elixir + Erlang image as the base.
@@ -95,13 +93,6 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
 
-      - name: Set Variables
-        id: set_mix_lock_hash
-        run: |
-          mix_lock_hash="${{ hashFiles(env.project_mix_lock) }}"
-          projects_hash="${{ hashFiles(env.projects_ex_blob, env.projects_locks_blob) }}"
-          echo "mix_lock_hash=$mix_lock_hash::$projects_hash" >> "$GITHUB_OUTPUT"
-
       # Step: Define how to cache deps. Restores existing cache if present.
       - name: Cache deps
         id: cache-deps
@@ -113,7 +104,7 @@ jobs:
             apps/**/deps
             apps/**/_build
 
-          key: ${{ runner.os }}-mix-${{ env.DEFAULT_ELIXIR }}-${{ env.DEFAULT_OTP }}-${{ hashFiles('**/mix.lock') }}
+          key: ${{ runner.os }}-mix-${{ env.DEFAULT_ELIXIR }}-${{ env.DEFAULT_OTP }}-${{ hashFiles('apps/**/mix.lock') }}
           restore-keys: |
             ${{ runner.os }}-mix-${{ env.DEFAULT_ELIXIR }}-${{ env.DEFAULT_OTP }}-
 
@@ -123,7 +114,10 @@ jobs:
         uses: actions/cache@v3
         with:
           path: "priv/plts"
-          key: lexical-plts-2-${{ env.DEFAULT_OTP }}-${{ env.DEFAULT_ELIXIR }}-${{ steps.set_mix_lock_hash.outputs.mix_lock_hash }}
+          key: lexical-plts-2-${{ env.DEFAULT_OTP }}-${{ env.DEFAULT_ELIXIR }}-${{ hashFiles('apps/**/mix.lock' ) }}-${{ github.run_id }}
+          restore-keys: |
+            lexical-plts-2-${{ env.DEFAULT_OTP }}-${{ env.DEFAULT_ELIXIR }}-${{ hashFiles('apps/**/mix.lock') }}-
+            lexical-plts-2-${{ env.DEFAULT_OTP }}-${{ env.DEFAULT_ELIXIR }}-
 
       # Step: Download project dependencies. If unchanged, uses
       # the cached version.