Fix input issues on Windows

.github/workflows/linux.yml

@@ -40,7 +40,7 @@ jobs:
   deploy:
     needs: test
     if: ${{ github.event_name == 'release' }}
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         target: [i686-unknown-linux-gnu, x86_64-unknown-linux-gnu]
@@ -55,18 +55,38 @@ jobs:
       - name: "Set up Cloud SDK"
         uses: google-github-actions/setup-gcloud@v2.1.1
 
-      - name: Install dependencies
-        run: |
-          sudo dpkg --add-architecture i386
-          sudo apt update
-          sudo apt install -y gcc-multilib libssl-dev:i386 # required to build for 32-bit arch
+      - name: Cache cargo registry and build artifacts
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo-container/registry
+            ~/.cargo-container/git
+            target
+          key: ${{ runner.os }}-release-cargo-${{ matrix.target }}-${{ hashFiles('Cargo.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-release-cargo-${{ matrix.target }}-
 
+      # Build inside the official Rust image on Debian bullseye (glibc 2.31, the same floor
+      # as Ubuntu 20.04) so the binaries run on older systems and the toolchain ships in the
+      # image instead of being downloaded on every run. gcc-multilib provides the 32-bit
+      # toolchain for the i686 target; reqwest uses rustls-tls, so no OpenSSL is needed. The
+      # image tag pins the toolchain to the MSRV. Cargo caches are mounted in and ownership
+      # normalised afterwards so the cache and gsutil can read the root-owned tree.
       - name: Cargo build
         run: |
-          export I686_UNKNOWN_LINUX_GNU_OPENSSL_LIB_DIR=/usr/lib/i386-linux-gnu # required to build for 32-bit arch
-          export I686_UNKNOWN_LINUX_GNU_OPENSSL_INCLUDE_DIR=/usr/include/i386-linux-gnu # required to build for 32-bit arch
-          rustup target add ${{ matrix.target }}
-          cargo build -p tmc --release --verbose --target ${{ matrix.target }}
+          mkdir -p "$HOME/.cargo-container/registry" "$HOME/.cargo-container/git"
+          docker run --rm \
+            -v "$PWD":/w -w /w \
+            -v "$HOME/.cargo-container/registry":/usr/local/cargo/registry \
+            -v "$HOME/.cargo-container/git":/usr/local/cargo/git \
+            rust:1.88.0-bullseye bash -euo pipefail -c '
+            export DEBIAN_FRONTEND=noninteractive
+            apt-get update
+            apt-get install -y gcc-multilib
+            rustup target add ${{ matrix.target }}
+            cargo build -p tmc --release --verbose --target ${{ matrix.target }}
+          '
+          sudo chown -R "$(id -u):$(id -g)" target "$HOME/.cargo-container"
 
       - name: Get the version
         id: get_version