Add no-std Read/Write Support

.envrc

@@ -0,0 +1,6 @@
+use_flake() {
+  watch_file flake.nix
+  watch_file flake.lock
+  eval "$(nix print-dev-env)"
+}
+use flake

.github/workflows/nix.yml

@@ -0,0 +1,31 @@
+name: "Nix flakes CI"
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+      - master
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    env:
+      NIX_BUILD_ARGS: -v --print-build-logs --fallback --show-trace
+    steps:
+    - uses: actions/checkout@v2.3.4
+    - uses: cachix/install-nix-action@v13
+      with:
+        install_url: https://nixos-nix-install-tests.cachix.org/serve/i6laym9jw3wg9mw6ncyrk6gjx4l34vvx/install
+        install_options: '--tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve'
+        extra_nix_config: |
+          experimental-features = nix-command flakes
+          access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
+    - uses: cachix/cachix-action@v10
+      with:
+        name: yatima
+        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+    - name: Nix build
+      run: nix build $NIX_BUILD_ARGS
+    - name: Nix check
+      run: nix flake check $NIX_BUILD_ARGS
+    - name: Nix shell
+      run: nix shell $NIX_BUILD_ARGS --command echo OK

.gitignore

@@ -1,4 +1,3 @@
 target
-Cargo.lock
 *.bk
 .idea