config(github/install-nix): Add gitlab token and domain

[MartinNikov]

No description provided.

[github-actions]

Thanks for your Pull Request!

Below you will find a summary of the cachix status of each package, for each supported platform.

package	x86_64-linux	x86_64-darwin	aarch64-darwin
cachix	❌ build failed	❌ build failed	❌ build failed
dcd	✅ cached	🚫 not supported	🚫 not supported
dmd	✅ cached	🚫 not supported	🚫 not supported
dscanner	✅ cached	🚫 not supported	🚫 not supported
dub	✅ cached	✅ cached	✅ cached
folder-size-metrics	✅ cached	🚫 not supported	🚫 not supported
foundry	✅ cached	✅ cached	✅ cached
geth	✅ cached	🚫 not supported	✅ cached
ldc	✅ cached	🚫 not supported	🚫 not supported
lido-withdrawals-automation	✅ cached	✅ cached	✅ cached
mcl	✅ cached	🚫 not supported	🚫 not supported
mev-boost	✅ cached	🚫 not supported	🚫 not supported
nethermind	✅ cached	🚫 not supported	🚫 not supported
nimbus	✅ cached	🚫 not supported	🚫 not supported
nix	❌ build failed	❌ build failed	❌ build failed
nix-eval-jobs	❌ build failed	❌ build failed	❌ build failed
nix-fast-build	❌ build failed	❌ build failed	❌ build failed
pyroscope	✅ cached	✅ cached	✅ cached
random-alerts	✅ cached	✅ cached	✅ cached
rustToolchain	✅ cached	✅ cached	✅ cached
secret	✅ cached	🚫 not supported	✅ cached
serve-d	✅ cached	🚫 not supported	🚫 not supported
terraform	✅ cached	🚫 not supported	🚫 not supported
terranix	✅ cached	🚫 not supported	🚫 not supported
web3signer	✅ cached	🚫 not supported	🚫 not supported

[EmilIvanichkovv]

suggestion

- name: Configure Nix
  shell: bash
  run: |
    mkdir -p "$HOME/.config/nix"

    access_tokens=""
    if [[ -n "${{ inputs.nix-github-token }}" && -n "${{ inputs.nix-gitlab-token }}" && -n "${{ inputs.nix-gitlab-domain }}" ]]; then
      access_tokens="access-tokens = github.com=${{ inputs.nix-github-token }} ${{ inputs.nix-gitlab-domain }}=PAT:${{ inputs.nix-gitlab-token }}"
    elif [[ -n "${{ inputs.nix-github-token }}" ]]; then
      access_tokens="access-tokens = github.com=${{ inputs.nix-github-token }}"
    elif [[ -n "${{ inputs.nix-gitlab-token }}" && -n "${{ inputs.nix-gitlab-domain }}" ]]; then
      access_tokens="access-tokens = ${{ inputs.nix-gitlab-domain }}=PAT:${{ inputs.nix-gitlab-token }}"
    fi

    cat > "$HOME/.config/nix/nix.conf" <<EOF
$access_tokens
allow-import-from-derivation = true
substituters = https://cache.nixos.org ${{ inputs.substituters }}
trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= ${{ inputs.trusted-public-keys }}
netrc-file = $HOME/.config/nix/netrc
EOF

    cat > "$HOME/.config/nix/netrc" <<EOF
machine ${{ inputs.cachix-cache }}.cachix.org password ${{ inputs.cachix-auth-token }}
EOF

You can update the whole run clause with this above.
This version is easier to read and modify without needing to mentally parse a long ternary chain.

Note: I have not tested it. Be conscious if you decide to use it.