ci: Fix pnpm store path for GitHub Actions.

This would ordinarily be determined by running ‘pnpm store path’, but
pnpm is not installed yet at that point.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

.github/workflows/production-suite.yml

@@ -75,7 +75,7 @@ jobs:
       - name: Restore pnpm store
         uses: actions/cache@v3
         with:
-          path: ~/.local/share/pnpm/store
+          path: /__w/.pnpm-store
           key: v1-pnpm-store-focal-${{ hashFiles('pnpm-lock.yaml') }}
 
       - name: Restore python cache
@@ -102,6 +102,12 @@ jobs:
           path: /tmp/production-build
           retention-days: 1
 
+      - name: Verify pnpm store path
+        run: |
+          set -x
+          path="$(pnpm store path)"
+          [[ "$path" == /__w/.pnpm-store/* ]]
+
       - name: Generate failure report string
         id: failure_report_string
         if: ${{ failure() && github.repository == 'zulip/zulip' && github.event_name == 'push' }}

.github/workflows/zulip-ci.yml

@@ -79,7 +79,7 @@ jobs:
       - name: Restore pnpm store
         uses: actions/cache@v3
         with:
-          path: ~/.local/share/pnpm/store
+          path: /__w/.pnpm-store
           key: v1-pnpm-store-${{ matrix.os }}-${{ hashFiles('pnpm-lock.yaml') }}
 
       - name: Restore python cache
@@ -245,6 +245,12 @@ jobs:
       - name: Check development database build
         run: ./tools/ci/setup-backend
 
+      - name: Verify pnpm store path
+        run: |
+          set -x
+          path="$(pnpm store path)"
+          [[ "$path" == /__w/.pnpm-store/* ]]
+
       - name: Generate failure report string
         id: failure_report_string
         if: ${{ failure() && github.repository == 'zulip/zulip' && github.event_name == 'push' }}