build: Use tmpfs for cargo cache

That seems to workaround rust-lang/cargo#8719.

.github/workflows/bleeding.yml

@@ -45,6 +45,13 @@ jobs:
     env:
       MATRIX_ARCHITECTURE: ${{ matrix.architecture }}
     steps:
+      - run: |
+          # Workaround for https://github.com/rust-lang/cargo/issues/8719
+          find /var/lib/docker
+          sudo mv /var/lib/docker /var/lib/docker-tmp
+          sudo mkdir -p /var/lib/docker
+          sudo mount -t tmpfs none /var/lib/docker
+          sudo mv /var/lib/docker-tmp/* /var/lib/docker/
       - uses: actions/[email protected]
       - name: Set up QEMU
         uses: docker/[email protected]

.github/workflows/dockerimage.yml

@@ -43,6 +43,12 @@ jobs:
     env:
       MATRIX_ARCHITECTURE: ${{ matrix.architecture }}
     steps:
+      - run: |
+          # Workaround for https://github.com/rust-lang/cargo/issues/8719
+          sudo mkdir -p /var/lib/docker
+          sudo mount -t tmpfs none /var/lib/docker
+          sudo systemctl status
+          sudo systemctl restart docker
       - uses: actions/[email protected]
       - name: Set up QEMU
         uses: docker/[email protected]

Dockerfile

@@ -110,11 +110,6 @@ RUN \
     fi \
   && curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y \
   && source $HOME/.cargo/env \
-  # Handle an extremely specific issue when building the cryptography package for \
-  # 32-bit architectures within QEMU running on a 64-bit host (issue #30). \
-  && if [ "${BUILDX_QEMU_ENV}" = "true" -a "$(getconf LONG_BIT)" = "32" ] ; then \
-        sed -i s/^cryptography==/cryptography==3.3.2/ /usr/src/weblate/requirements.txt ; \
-  fi \
   && python3 -m pip install --no-cache-dir --upgrade $(grep -E '^(pip|wheel|setuptools)==' /usr/src/weblate/requirements.txt) \
   && python3 -m pip install --no-cache-dir --no-binary :all: $(grep ^cffi== /usr/src/weblate/requirements.txt) \
   && case "$VERSION" in \
@@ -159,7 +154,7 @@ RUN \
   && apt-get -y autoremove \
   && apt-get clean \
   && rustup self uninstall -y \
-  && rm -rf /root/.cache /tmp/* /var/lib/apt/lists/*
+  && rm -rf /root/.cache /root/.cargo /tmp/* /var/lib/apt/lists/*
 
 # Apply hotfixes on Weblate
 RUN find /usr/src/weblate -name '*.patch' -print0 | sort -z | \