Install Wasp from linked PR

Author: cprecioso

.github/workflows/e2e-tests.yml

@@ -20,12 +20,6 @@ jobs:
       - name: Checkout the repo
         uses: actions/checkout@v4
 
-      - name: Get linked PR branch
-        id: get-linked-pr-branch
-        uses: ./.github/actions/get-linked-pr
-        with:
-          target-repo: wasp-lang/wasp
-
       - name: Setup Node.js
         id: setup-node
         uses: actions/setup-node@v4
@@ -35,7 +29,25 @@ jobs:
       - name: Docker setup
         uses: docker/setup-buildx-action@v3
 
-      - name: Install Wasp
+      - name: Get linked PR branch
+        id: get-linked-pr-branch
+        uses: ./.github/actions/get-linked-pr
+        with:
+          target-repo: wasp-lang/wasp
+
+      - name: Download Wasp build artifacts from linked PR
+        if: steps.get-linked-pr-branch.outputs.pr-branch
+        uses: wasp-lang/wasp/.github/actions/fetch-nightly-cli@main
+        with:
+          branch: ${{ steps.get-linked-pr-branch.outputs.pr-branch }}
+          output-dir: ${{ runner.temp }}/wasp-cli
+
+      - name: Install Wasp (branch ${{ steps.get-linked-pr-branch.outputs.pr-branch }})
+        if: ${{ steps.get-linked-pr-branch.outputs.pr-branch }}
+        run: curl -sSL https://get.wasp.sh/installer.sh | sh -s -- -f ${{ runner.temp }}/wasp-cli/wasp-*.tar.gz
+
+      - name: Install Wasp (version ${{ env.WASP_VERSION }})
+        if: ${{ !steps.get-linked-pr-branch.outputs.pr-branch }}
         run: curl -sSL https://get.wasp.sh/installer.sh | sh -s -- -v ${{ env.WASP_VERSION }}
 
       - name: Cache global node modules