refactor(gh-actions): Use bash heredoc string

Author: PetarKirov

.github/install-nix/action.yml

@@ -32,14 +32,15 @@ runs:
       shell: bash
       run: |
         mkdir -p $HOME/.config/nix
-        {
-          echo "machine ${{inputs.cachix-cache}}.cachix.org password ${{inputs.cachix-auth-token}}"
-        } >> $HOME/.config/nix/netrc
-        {
-          echo "${{ inputs.nix-github-token != '' && format('access-tokens = github.com={0}', inputs.nix-github-token) || '' }}
-          accept-flake-config = true
+
+        cat << EOF > "$HOME/.config/nix/nix.conf"
+          ${{ inputs.nix-github-token != '' && format('access-tokens = github.com={0}', inputs.nix-github-token) || '' }}
           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"
-        } > $HOME/.config/nix/nix.conf
+        EOF
+
+        cat << EOF > "$HOME/.config/nix/netrc"
+          machine ${{inputs.cachix-cache}}.cachix.org password ${{inputs.cachix-auth-token}}
+        EOF

.github/workflows/update-flake-lock.yml

@@ -36,11 +36,10 @@ jobs:
         shell: bash
         run: |
           mkdir -p $HOME/.config/nix
-          {
-            echo "${{ secrets.NIX_GITHUB_TOKEN != '' && format('access-tokens = github.com={0}', secrets.NIX_GITHUB_TOKEN) || '' }}
-            accept-flake-config = true"
-          } > $HOME/.config/nix/nix.conf
-
+          cat << EOF > "$HOME/.config/nix/nix.conf"
+            ${{ secrets.NIX_GITHUB_TOKEN != '' && format('access-tokens = github.com={0}', secrets.NIX_GITHUB_TOKEN) || '' }}
+            allow-import-from-derivation = true
+          EOF
 
       - name: Run `nix flake update`
         id: update-lockfile

.github/workflows/update-flake-packages.yml

@@ -36,11 +36,10 @@ jobs:
         shell: bash
         run: |
           mkdir -p $HOME/.config/nix
-          {
-            echo "${{ secrets.NIX_GITHUB_TOKEN != '' && format('access-tokens = github.com={0}', secrets.NIX_GITHUB_TOKEN) || '' }}
-            accept-flake-config = true
-            allow-import-from-derivation = true"
-          } > $HOME/.config/nix/nix.conf
+          cat << EOF > "$HOME/.config/nix/nix.conf"
+            ${{ secrets.NIX_GITHUB_TOKEN != '' && format('access-tokens = github.com={0}', secrets.NIX_GITHUB_TOKEN) || '' }}
+            allow-import-from-derivation = true
+          EOF
 
       - uses: tibdex/[email protected]
         id: generate-token