initial commit

Signed-off-by: Xe <me@christine.website>

.envrc

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+use flake

.gitignore

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+result
+.direnv

README.md

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+## Build
+
+```console
+$ nix build
+```

flake.lock

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+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1645433236,
+        "narHash": "sha256-4va4MvJ076XyPp5h8sm5eMQvCrJ6yZAbBmyw95dGyw4=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "7f9b6e2babf232412682c09e57ed666d8f84ac2d",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-unstable",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "utils": "utils"
+      }
+    },
+    "utils": {
+      "locked": {
+        "lastModified": 1644229661,
+        "narHash": "sha256-1YdnJAsNy69bpcjuoKdOYQX0YxZBiCYZo4Twxerqv7k=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "3cecb5b042f7f209c56ffd8371b2711a290ec797",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  description = "A basic Go web server setup";
+
+  inputs = {
+    nixpkgs.url = "nixpkgs/nixos-unstable";
+    utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, utils }:
+    utils.lib.eachSystem [
+      "x86_64-linux"
+      "aarch64-linux"
+      "x86_64-darwin"
+      "aarch64-darwin"
+    ] (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+        version = builtins.substring 0 8 self.lastModifiedDate;
+      in {
+        defaultPackage = pkgs.buildGoModule {
+          pname = "go-hello";
+          inherit version;
+          src = ./.;
+
+          # This hash locks the dependencies of this package. It is
+          # necessary because of how Go requires network access to resolve
+          # VCS.  See https://www.tweag.io/blog/2021-03-04-gomod2nix/ for
+          # details. Normally one can build with a fake sha256 and rely on native Go
+          # mechanisms to tell you what the hash should be or determine what
+          # it should be "out-of-band" with other tooling (eg. gomod2nix).
+          # To begin with it is recommended to set this, but one must
+          # remeber to bump this hash when your dependencies change.
+          #vendorSha256 = pkgs.lib.fakeSha256;
+          vendorSha256 = "sha256-pQpattmS9VmO3ZIQUFn66az8GSmB4IvYhTTCFn6SUmo=";
+        };
+
+        packages = {};
+
+        defaultApp = self.defaultPackage.${system};
+
+        devShell = pkgs.mkShell {
+          buildInputs = with pkgs; [ go gopls goimports go-tools ];
+        };
+      });
+}

go.mod

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+module repository.host/org/name
+
+go 1.17

main.go

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+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"net/http"
+)
+
+var (
+	bindhost = flag.String("bind", ":3031", "host/port to listen on")
+)
+
+func main() {
+	flag.Parse()
+
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprintln(w, "hello from nix!")
+	})
+
+	log.Printf("listening for HTTP on %s", *bindhost)
+	log.Fatal(http.ListenAndServe(*bindhost, nil))
+}