Toolchain+CI: Remove cache handling logic from `BuildIt.sh`

Instead of manually compressing/decompressing a toolchain tarball if
`TRY_USE_LOCAL_TOOLCHAIN` is set, let's use the cache action's automatic
built-in compression (which is zstd, I believe).

3 files changed, 16 insertions, 11 deletions

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 51f2c1fc7f..efa7aed1d0 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -86,14 +86,15 @@ jobs:
         uses: actions/cache/restore@v3
         id: toolchain-cache
         with:
-          path: ${{ github.workspace }}/Toolchain/Cache/
+          path: ${{ github.workspace }}/Toolchain/Local/${{ matrix.arch }}
           # This assumes that *ALL* LibC and LibPthread headers have an impact on the Toolchain.
           # This is wrong, and causes more Toolchain rebuilds than necessary.
           # However, we want to avoid false cache hits at all costs.
           key: ${{ runner.os }}-toolchain-${{ matrix.arch }}-${{ steps.stamps.outputs.libc_headers }}
 
-      - name: Restore or regenerate Toolchain
-        run: TRY_USE_LOCAL_TOOLCHAIN=y ARCH="${{ matrix.arch }}" ${{ github.workspace }}/Toolchain/BuildIt.sh
+      - name: Build toolchain
+        if: ${{ !steps.toolchain-cache.outputs.cache-hit }}
+        run: ARCH="${{ matrix.arch }}" ${{ github.workspace }}/Toolchain/BuildIt.sh
 
       - name: Update toolchain cache
         uses: actions/cache/save@v3
@@ -101,7 +102,7 @@ jobs:
         # as it would be discarded after being merged anyway.
         if: ${{ github.event_name != 'pull_request' && !steps.toolchain-cache.outputs.cache-hit }}
         with:
-          path: ${{ github.workspace }}/Toolchain/Cache/
+          path: ${{ github.workspace }}/Toolchain/Local/${{ matrix.arch }}
           key: ${{ steps.toolchain-cache.outputs.cache-primary-key }}
 
       - name: ccache(1) cache
diff --git a/.github/workflows/pvs-studio-static-analysis.yml b/.github/workflows/pvs-studio-static-analysis.yml
index e03afbf0bb..148b68a747 100644
--- a/.github/workflows/pvs-studio-static-analysis.yml
+++ b/.github/workflows/pvs-studio-static-analysis.yml
@@ -48,15 +48,17 @@ jobs:
       - name: Toolchain cache
         # This job should always read the cache, never populate it.
         uses: actions/cache/restore@v3
+        id: toolchain-cache
         with:
-          path: ${{ github.workspace }}/Toolchain/Cache/
+          path: ${{ github.workspace }}/Toolchain/Local/${{ env.PVS_STUDIO_ANALYSIS_ARCH }}
           # This assumes that *ALL* LibC and LibPthread headers have an impact on the Toolchain.
           # This is wrong, and causes more Toolchain rebuilds than necessary.
           # However, we want to avoid false cache hits at all costs.
-          key: ${{ runner.os }}-toolchain-${{ env.PVS_STUDIO_NALYSIS_ARCH }}-${{ steps.stamps.outputs.libc_headers }}
+          key: ${{ runner.os }}-toolchain-${{ env.PVS_STUDIO_ANALYSIS_ARCH }}-${{ steps.stamps.outputs.libc_headers }}
 
-      - name: Restore or regenerate Toolchain
-        run: TRY_USE_LOCAL_TOOLCHAIN=y ARCH="${{ env.PVS_STUDIO_ANALYSIS_ARCH }}" ${{ github.workspace }}/Toolchain/BuildIt.sh
+      - name: Build toolchain
+        if: ${{ !steps.toolchain-cache.outputs.cache-hit }}
+        run: ARCH="${{ env.PVS_STUDIO_ANALYSIS_ARCH }}" ${{ github.workspace }}/Toolchain/BuildIt.sh
 
       - name: Create build directory
         run: |
diff --git a/.github/workflows/sonar-cloud-static-analysis.yml b/.github/workflows/sonar-cloud-static-analysis.yml
index d94b3a45b9..a8e575a433 100644
--- a/.github/workflows/sonar-cloud-static-analysis.yml
+++ b/.github/workflows/sonar-cloud-static-analysis.yml
@@ -80,15 +80,17 @@ jobs:
       - name: Toolchain cache
         # This job should always read the cache, never populate it.
         uses: actions/cache/restore@v3
+        id: toolchain-cache
         with:
-          path: ${{ github.workspace }}/Toolchain/Cache/
+          path: ${{ github.workspace }}/Toolchain/Local/${{ env.SONAR_ANALYSIS_ARCH }}
           # This assumes that *ALL* LibC and LibPthread headers have an impact on the Toolchain.
           # This is wrong, and causes more Toolchain rebuilds than necessary.
           # However, we want to avoid false cache hits at all costs.
           key: ${{ runner.os }}-toolchain-${{ env.SONAR_ANALYSIS_ARCH }}-${{ steps.stamps.outputs.libc_headers }}
 
-      - name: Restore or regenerate Toolchain
-        run: TRY_USE_LOCAL_TOOLCHAIN=y ARCH="${{ env.SONAR_ANALYSIS_ARCH }}" ${{ github.workspace }}/Toolchain/BuildIt.sh
+      - name: Build toolchain
+        if: ${{ !steps.toolchain-cache.outputs.cache-hit }}
+        run: ARCH="${{ env.SONAR_ANALYSIS_ARCH }}" ${{ github.workspace }}/Toolchain/BuildIt.sh
 
       - name: Create build directory
         run: |