CI: GitHub: Cabal: split Core & Remote into separate workflows

Before: I fixed Core, but CI was falling due to Hackage Core failing in Remote
build.

This change reassambles of how they link togather versionally.

M  .github/workflows/Core-Cabal-Linux.yml

Author: Anton-Latukha

.github/workflows/Cabal-Linux.yml renamed to .github/workflows/Cabal-Linux-Remote.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        packageRoot: [ hnix-store-core, hnix-store-remote ]
+        packageRoot: [ hnix-store-remote ]
         ghc: [ "8.10", "8.4" ]
     defaults:
       run:

.github/workflows/Core-Cabal-Linux.yml

@@ -0,0 +1,71 @@
+name: "Hackage, Cabal, Linux"
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+  schedule:
+    - cron: "45 02 * * *"
+
+env:
+  cabalConfig: --enable-tests --disable-optimization --enable-deterministic
+
+jobs:
+
+  build10:
+    name: "GHC"
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        # Separation between Core & Store workflows made deliberately, so when one fixes Core, CI does not falls because of the Hackage Core Remote builds with.
+        # Also singleton also use is deliberate, it allows to reference the value in the further configuration & also leaves a name in the CI & preserves matrix flexibility for the future.
+        packageRoot: [ hnix-store-core ]
+        ghc: [ "8.10", "8.4" ]
+    defaults:
+      run:
+        working-directory: "./${{ matrix.packageRoot }}"
+    steps:
+
+      - name: "Git checkout"
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+
+      - name: "Haskell env setup"
+        id: HaskEnvSetup
+        uses: haskell/actions/setup@v1
+        with:
+          ghc-version: ${{ matrix.ghc }}
+
+      - name: "Repository update"
+        run: cabal v2-update
+
+      - name: "Install additional system packages"
+        run: sudo apt install libsodium-dev
+
+      # NOTE: Freeze is for the caching
+      - name: "Configuration freeze"
+        run: cabal v2-freeze $cabalConfig
+
+      - name: "Hack: Copy freeze file to the root dir"
+        run: cp -a cabal.project.freeze ../cabal.project.freeze
+
+      - name: "Configuring GitHub cache"
+        uses: actions/cache@v2
+        with:
+          path: |
+            ${{ steps.HaskEnvSetup.outputs.cabal-store }}
+            dist-newstyle
+          key: ${{ matrix.packageRoot }}-${{ runner.os }}-Cabal-${{ matrix.ghc }}-${{ hashFiles( 'cabal.project.freeze' ) }}
+          restore-keys: ${{ matrix.packageRoot }}-${{ runner.os }}-Cabal-${{ matrix.ghc }}-
+
+      - name: "Build"
+        run: cabal v2-build $cabalConfig
+
+      - name: "Tests"
+        run: cabal v2-test $cabalConfig
+
+      - name: "Source distribution file"
+        if: ${{ matrix.ghc == '8.10' }}
+        run: cabal v2-sdist

.github/workflows/Cabal-macOS.yml renamed to .github/workflows/Core-Cabal-macOS.yml

@@ -13,14 +13,12 @@ env:
 
 jobs:
 
-  #  2021-03-12: NOTE: Please, enable uncommented working code when `remote` builds on macOS.
   build10:
     name: "GHC"
     runs-on: macos-latest
     strategy:
       matrix:
         packageRoot: [ hnix-store-core ]
-        # packageRoot: [ hnix-store-core, hnix-store-remote ]
     defaults:
       run:
         working-directory: "./${{ matrix.packageRoot }}"
@@ -43,16 +41,6 @@ jobs:
       - name: "Install additional system packages"
         run: cabal v2-install tasty-discover
 
-      # # Still required for Remote
-      # - name: "Install Nix"
-      #   uses: cachix/install-nix-action@v12
-      #   if: matrix.packageRoot == 'hnix-store-remote'
-
-      # # Remote: Enabling testsuite, because it requires networking in the default Nix environment.
-      # - name: "Project-specific Cabal configuration"
-      #   if: matrix.packageRoot == 'hnix-store-remote'
-      #   run: echo "cabalConfig=$cabalConfig -f io-testsuite" >> $GITHUB_ENV
-
       # NOTE: Freeze is for the caching
       - name: "Configuration freeze"
         run: cabal v2-freeze $cabalConfig