fixup! ci: also run the Windows test suite with BusyBox' ash

Author: dscho

.github/workflows/main.yml

@@ -152,9 +152,22 @@ jobs:
     - name: download BusyBox' ash.exe and use it as the POSIX shell
       if: matrix.use-busybox == true
       shell: bash
+      env:
+        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       run: |
-        curl -fLo /mingw64/bin/ash.exe \
-          https://github.com/git-for-windows/git-sdk-64/raw/c7bf8b60df36106efa91fc0f68034bcef4896bfb/mingw64/libexec/busybox/ash.exe &&
+        # TEMPORARY: pull the freshly-built, heap-corruption-fixed ash.exe
+        # straight from the busybox-w32 PR build (git-for-windows/busybox-w32#15)
+        # instead of the stale copy shipped in git-sdk-64. Once that fix is
+        # released into the SDK this step reverts to the pinned download.
+        run_id="$(gh run list -R git-for-windows/busybox-w32 \
+          --branch fix-quote-arg-msys2-heap-corruption \
+          --workflow build.yml --status success --limit 1 \
+          --json databaseId --jq '.[0].databaseId')" &&
+        test -n "$run_id" &&
+        gh run download -R git-for-windows/busybox-w32 "$run_id" \
+          -n busybox -D bb &&
+        test -f bb/busybox.exe &&
+        cp bb/busybox.exe /mingw64/bin/ash.exe &&
         ash="$(cygpath -am /mingw64/bin/ash.exe)" &&
         echo "GIT_TEST_SHELL_PATH=$ash" >>$GITHUB_ENV &&
         echo "SHELL=$ash" >>$GITHUB_ENV &&