Optimize Go's mod cache usage across GH Actions

In order to be able to share caches between operating systems, you have
to set enableCrossOsArchive to true, and the cache paths have to be
identical (which was already the case).

Also make sure that go.mod/go.sum files always use LF line endings, even
on Windows. Otherwise the cache keys would be different.

See: https://github.com/actions/cache/blob/v4.2.0/tips-and-workarounds.md#cross-os-cache
Signed-off-by: Tom Wieczorek <[email protected]>

Author: twz123

.gitattributes

@@ -0,0 +1,2 @@
+go.mod text eol=lf
+go.sum text eol=lf

.github/workflows/build-k0s.yml

@@ -80,9 +80,9 @@ jobs:
       - name: "Cache :: GOMODCACHE"
         uses: actions/cache@v4
         with:
-          key: build-k0s-${{ inputs.target-os }}-${{ inputs.target-arch }}-gomodcache-${{ hashFiles('go.sum') }}
-          path: |
-            build/cache/go/mod
+          key: build-k0s-gomodcache-${{ hashFiles('go.sum') }}
+          path: build/cache/go/mod
+          enableCrossOsArchive: true
 
       - name: "Build :: k0s"
         run: |

.github/workflows/check-network.yaml

@@ -89,11 +89,11 @@ jobs:
           path: |
             build/cache/go/build
       - name: Cache GOMODCACHE
-        uses: actions/cache@v4
+        uses: actions/cache/restore@v4
         with:
-          key: ${{ runner.os }}-build-gomodcache-linux-${{ hashFiles('go.sum') }}
-          path: |
-            build/cache/go/mod
+          key: build-k0s-gomodcache-${{ hashFiles('go.sum') }}
+          path: build/cache/go/mod
+          enableCrossOsArchive: true
 
       - name: Build k0s Binary
         id: k0s_build

.github/workflows/go.yml

@@ -182,8 +182,8 @@ jobs:
         uses: actions/cache@v4
         with:
           key: unittests-k0s-gomodcache-${{ hashFiles('go.sum') }}
-          path: |
-            build/cache/go/mod
+          path: build/cache/go/mod
+          enableCrossOsArchive: true
 
       - name: Run unit tests
         run: make check-unit $UNITTEST_EXTRA_ARGS