[main] Fixes for GH workflows for older OpenTofu versions (#3485)

Signed-off-by: Andrei Ciobanu <andrei.ciobanu@opentofu.org>

.github/workflows/website.yml

@@ -39,9 +39,20 @@ jobs:
       - name: Prepare website container
         run: docker compose -f docker-compose.build.yml build
         working-directory: website
+      # The segregation between the next 2 steps is because on non-main branches, there are
+      # blog posts that point to the 'main' branch documentation that is fully missing from
+      # the branches that are used to maintain older versions of OpenTofu.
+      # Therefore, we run the full website check on main (and any branch in a PR that points
+      # to the main branch) and we run a trimmed down website checks for any runs against
+      # a non-main branch (or a PR that points to a non-main branch)
       - name: Build website
+        if: github.ref == 'refs/heads/main' || github.base_ref == 'main'
         run: docker compose -f docker-compose.build.yml up --exit-code-from website
         working-directory: website
+      - name: Build website with warns
+        if: github.ref != 'refs/heads/main' && github.base_ref != 'main'
+        run: docker compose -f docker-compose.build-non-main.yml up --exit-code-from website
+        working-directory: website
 
   installation-instructions:
     name: "Test Installation Instructions"

website/docker-compose.build-non-main.yml

@@ -0,0 +1,18 @@
+# Copyright (c) The OpenTofu Authors
+# SPDX-License-Identifier: MPL-2.0
+# Copyright (c) 2023 HashiCorp, Inc.
+# SPDX-License-Identifier: MPL-2.0
+
+# This file is meant to be used only in running the `website` GH workflow on non-main branches and PRs that are targeting non-main branches.
+# This is because the [blog/](https://github.com/opentofu/opentofu.org/tree/main/blog) content can point to documentation that is not available
+# in branches of lower versions of OpenTofu.
+services:
+  website:
+    build: .
+    ports:
+      - "3000:3000"
+    volumes:
+      - ../:/work/opentofu-repo/main
+    command: >
+      sh -c "sed -i 's#throw#warn#g' docusaurus.config.ts && npm run build"
+    restart: no

website/docs/intro/install/test-install-instructions.sh

@@ -36,7 +36,7 @@ for SERVICE in $SERVICES; do
     docker compose logs ${SERVICE}
     FAILED=$((${FAILED}+1))
   fi
-  cat $TEMPFILE | grep -a -E "^[a-zA-Z]+-${SERVICE}-1\s+\| " | sed -E "s/^[a-zA-Z]+-${SERVICE}-1\s+\| //"
+  cat $TEMPFILE | grep -a -E "^${SERVICE}-1\s+\| " | sed -E "s/^${SERVICE}-1\s+\| //"
   echo "::endgroup::"
 done