[all] remove nix

When this works, it's slow; when it doesn't work, I can't figure out how to fix it ;(

.github/workflows/common.yml

@@ -106,106 +106,3 @@ jobs:
     - name: Benchmark Test
       shell: bash
       run: ./all.py bench ${{ inputs.workdir }} --default --frames 10
-
-  nix:
-    name: Nix
-    runs-on: ubuntu-22.04
-    if: ${{ !contains(github.event.head_commit.message, '[skip nix]') }}
-    outputs:
-      flake_status: ${{ steps.early.outputs.flake_status }}
-      shell_status: ${{ steps.early.outputs.shell_status }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-      - id: early
-        name: Check if nix files exist
-        shell: bash
-        working-directory: ${{ inputs.workdir }}
-        run: |
-          flake_status="skip"
-          if [ -f "derivation.nix" ]; then
-            flake_status="found"
-          fi
-          echo "flake_status=${flake_status}" >> "${GITHUB_OUTPUT}"
-
-          shell_status="skip"
-          if [ -f "shell.nix" ]; then
-            shell_status="found"
-          fi
-          echo "shell_status=${shell_status}" >> "${GITHUB_OUTPUT}"
-
-  nix-flake:
-    name: Nix Flake
-    runs-on: ubuntu-22.04
-    needs: nix
-    if: ${{ !contains(github.event.head_commit.message, '[skip nix flake]') && needs.nix.outputs.flake_status == 'found' }}
-    steps:
-    - name: Checkout
-      uses: actions/checkout@v3
-      with:
-        submodules: recursive
-    - name: Set Up Build Cache
-      uses: actions/cache@v3
-      id: nix-cache
-      with:
-        path: /tmp/nix-store.nar
-        key: ${{ runner.os }}-${{ inputs.workdir }}-nix-store.nar-${{ hashFiles('flake.nix', 'flake.lock', format('{0}/derivation.nix', inputs.workdir)) }}
-        restore-keys: ${{ runner.os }}-${{ inputs.workdir }}-nix-store.nar-
-    - name: Install Deps
-      uses: cachix/install-nix-action@v15
-      with:
-        nix_path: nixpkgs=channel:nixos-22.11
-      # see: https://github.com/cachix/install-nix-action/issues/56#issuecomment-1300421537
-    - name: "Import Nix Store Cache"
-      if: "steps.nix-cache.outputs.cache-hit == 'true'"
-      run: "nix-store --import < /tmp/nix-store.nar"
-    - name: Flake Build
-      shell: bash
-      run: |
-        nix eval .#packages --impure --raw \
-            --apply '(import ./utils/get-builds-for-lang.nix { lang = "${{ inputs.workdir }}"; attr = "packages"; })' \
-          | xargs nix build -L
-    - name: Flake Run
-      shell: bash
-      run: |
-        nix eval .#packages --impure --raw \
-            --apply '(import ./utils/get-builds-for-lang.nix { lang = "${{ inputs.workdir }}"; prefix = ".#"; })' \
-          | xargs -I{} nix run {} -- --help
-    - name: Flake Shell
-      shell: bash
-      working-directory: ${{ inputs.workdir }}
-      run: nix develop ..#${{ inputs.workdir }} --command bash -c './build.sh && ./rosettaboy-release --help'
-    - name: Flake Checks
-      shell: bash
-      run: |
-        nix eval .#checks --impure --raw \
-            --apply '(import ./utils/get-builds-for-lang.nix { lang = "${{ inputs.workdir }}"; attr = "checks"; })' \
-          | xargs nix build -L
-    - name: "Export Nix Store Cache"
-      shell: bash
-      # we could add devShells here but it might fill the cache fast...
-      run: |
-        nix eval .#packages --impure --raw \
-            --apply '(import ./utils/get-builds-for-lang.nix { lang = "${{ inputs.workdir }}"; attr = "packages"; })' \
-          | xargs -I{} bash -c "nix eval --raw {}; echo" \
-          | xargs nix-store -qR \
-          | xargs nix-store --export > /tmp/nix-store.nar
-
-  nix-shell:
-    name: Nix Shell
-    runs-on: ubuntu-22.04
-    needs: nix
-    if: ${{ !contains(github.event.head_commit.message, '[skip nix flake]') && needs.nix.outputs.shell_status == 'found' }}
-    steps:
-    - name: Checkout
-      uses: actions/checkout@v3
-      with:
-        submodules: recursive
-    - name: Install Nix
-      uses: cachix/install-nix-action@v15
-      with:
-        nix_path: nixpkgs=channel:nixos-22.11
-    - name: Run Shell
-      shell: bash
-      working-directory: ${{ inputs.workdir }}
-      run: nix-shell --pure --run './build.sh && ./rosettaboy-release --help'

README.md

@@ -66,11 +66,7 @@ that the user has the standard language dev kits installed (eg we assume
 anyone who wants to work on the Rust version will have Cargo installed;
 anyone who wants to work on Python will have virtualenv + pip; etc)
 
-If you have either Nix or Docker available, you can run `./utils/shell.sh` to create and run an environment with all necessary dev tools pre-installed. — `./build.sh && ./rosettaboy-release --headless --silent` should be able to pass tests for all languages.
-
-If you prefer Docker, you can use `./utils/shell-docker.sh` instead.
-
-If you prefer Nix, you can manually run `nix develop` or `nix-shell` instead. When run with an implementation as an argument, e.g.  `nix develop .#py`, it will only provide what is needed for that language, and when run in the project root it will provide everything needed for all languages. Alternatively, there is also an integration with [nix-direnv](https://github.com/nix-community/nix-direnv).
+If you have Docker available, you can run `./utils/shell.sh` to create and run an environment with all necessary dev tools pre-installed. — `./build.sh && ./rosettaboy-release --headless --silent` should be able to pass tests for all languages.
 
 
 Benchmarks