Create a Nix shell for the project

.travis.yml

@@ -1,25 +1,16 @@
-dist: focal
-language: go
-go:
-  - 1.13
+language: nix
 
-before_install:
-  - sudo apt-get update
-  - sudo apt-get install git jq wget graphviz
-  - wget "https://github.com/gohugoio/hugo/releases/download/v${HUGO_RELEASE}/hugo_extended_${HUGO_RELEASE}_Linux-64bit.deb"
-  - sudo dpkg -i *.deb
-  - sudo gem install asciidoctor asciidoctor-diagram
-  - go version
+before_script:
+  - sudo mkdir -p /etc/nix && echo 'sandbox = true' | sudo tee /etc/nix/nix.conf
 
 script:
-  - git clone https://git.sr.ht/~sircmpwn/openring && cd openring && go build && cd ../
-  - chmod +x ./bin/openring-create && ./bin/openring-create
+  - nix-shell --pure ./shell.nix --run "./bin/openring-create"
+  - nix-env -i hugo go asciidoctor
   - hugo
 
 env:
   global:
     - PRODUCTION=true
-    - HUGO_RELEASE=0.76.0
 
 deploy:
   local_dir: "./public/"

shell.nix

@@ -0,0 +1,53 @@
+let
+  # See https://nixos.wiki/wiki/FAQ/Pinning_Nixpkgs for more information on pinning
+  nixpkgs = builtins.fetchTarball {
+    # Descriptive name to make the store path easier to identify
+    name = "nixpkgs-unstable-2020-11-07";
+    # Commit hash for nixos-unstable as of 2019-02-26
+    url = https://github.com/NixOS/nixpkgs/archive/c54c614000644ecf9b8f8e9c873cfa91d1c05bf1.tar.gz;
+    # Hash obtained using `nix-prefetch-url --unpack <url>`
+    sha256 = "19xmsj1dhq25arhsfx0sl3r1y0zgpzfwhybc5dsxr1szh71wz3xs";
+  };
+in
+{ pkgs ? import <nixpkgs> {} }:
+
+with pkgs;
+
+let
+  openring = buildGoModule rec {
+    pname = "openring";
+    version = "af9038b5";
+
+    src = fetchgit {
+      url = "https://git.sr.ht/~sircmpwn/openring";
+      rev = "af9038b5bbf8d0bac9f401ccab263990df900dab";
+      sha256 = "1r8vnqbsrjrafva12v5cbv4229qsx7z5lp19zhqzky9chais4c9k";
+    };
+
+    vendorSha256 = "sha256-BbBTmkGyLrIWphXC+dBaHaVzHuXRZ+4N/Jt2k3nF7Z4=";
+
+    subPackages = [ "." ];
+
+    meta = with stdenv.lib; {
+      description = "Tool for generating a webring from a list of RSS feeds.";
+      homepage = "https://git.sr.ht/~sircmpwn/openring";
+      license = licenses.gpl3;
+    };
+  };
+in
+mkShell {
+  buildInputs = [
+    asciidoctor
+    git
+    go
+    hugo
+    jq
+    openring
+  ];
+
+  shellHook = ''
+    chmod +x ./bin/openring-create
+    go version
+    hugo version
+  '';
+}