Move go installation so that it takes place before the cache task

Some variables defined in the go installation are used in the cache
task, so the go installation must happen first.

Co-authored-by: Nick M. <50747025+mcdonnnj@users.noreply.github.com>

.github/workflows/build.yml

@@ -23,6 +23,20 @@ jobs:
         uses: actions/setup-python@v2
         with:
           python-version: 3.9
+      # GO_VERSION and GOCACHE are used by the cache task, so the go
+      # installation must happen before that.
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '1.16'
+      - name: Store installed Go version
+        run: |
+          echo "GO_VERSION="\
+          "$(go version | sed 's/^go version go\([0-9.]\+\) .*/\1/')" \
+          >> $GITHUB_ENV
+      - name: Lookup go cache directory
+        id: go-cache
+        run: |
+          echo "::set-output name=dir::$(go env GOCACHE)"
       - uses: actions/cache@v2
         env:
           BASE_CACHE_KEY: "${{ github.job }}-${{ runner.os }}-\
@@ -48,18 +62,6 @@ jobs:
             ${{ hashFiles('**/.pre-commit-config.yaml') }}"
           restore-keys: |
             ${{ env.BASE_CACHE_KEY }}
-      - uses: actions/setup-go@v2
-        with:
-          go-version: '1.16'
-      - name: Store installed Go version
-        run: |
-          echo "GO_VERSION="\
-          "$(go version | sed 's/^go version go\([0-9.]\+\) .*/\1/')" \
-          >> $GITHUB_ENV
-      - name: Lookup go cache directory
-        id: go-cache
-        run: |
-          echo "::set-output name=dir::$(go env GOCACHE)"
       - name: Setup curl cache
         run: mkdir -p ${{ env.CURL_CACHE_DIR }}
       - name: Install Packer