golds: init at 0.7.1

Signed-off-by: phanirithvij <phanirithvij2000@gmail.com>
Co-authored-by: Kenichi Kamiya <kachick1@gmail.com>

pkgs/by-name/go/golds/info_module-gover.patch

@@ -0,0 +1,25 @@
+diff --git a/internal/server/info_module.go b/internal/server/info_module.go
+index d2513bd..ad2921e 100644
+--- a/internal/server/info_module.go
++++ b/internal/server/info_module.go
+@@ -8,6 +8,7 @@ import (
+ 	"io/ioutil"
+ 	"log"
+ 	"os"
++	"os/exec"
+ 	"path/filepath"
+ 	"regexp"
+ 	"strings"
+@@ -756,7 +757,11 @@ func findGoToolchainVersionFromGoRoot(goroot string) (string, error) {
+ 		versionData, err = ioutil.ReadFile(filepath.Join(goroot, "VERSION.cache"))
+ 	}
+ 	if err != nil {
+-		return "", fmt.Errorf("failed to get Go toolchain version in GOROOT (%s)", goroot)
++		cmd := exec.Command("go", "env", "GOVERSION")
++		versionData, err = cmd.Output()
++		if err != nil {
++			return "", fmt.Errorf("failed to get Go toolchain version in GOROOT (%s)", goroot)
++		}
+ 	}
+ 	matches := findGoVersionRegexp.FindSubmatch(versionData)
+ 	if len(matches) >= 1 {

pkgs/by-name/go/golds/package.nix

@@ -0,0 +1,42 @@
+{
+  lib,
+  buildGoModule,
+  fetchFromGitHub,
+  testers,
+  golds, # self
+}:
+
+buildGoModule rec {
+  pname = "golds";
+  version = "0.7.1";
+
+  src = fetchFromGitHub {
+    owner = "go101";
+    repo = "golds";
+    tag = "v${version}";
+    hash = "sha256-6YkyKJtSAFFYidMlZXSjNpjyIIaTlibg/QMMin/NbU0=";
+  };
+
+  # nixpkgs is not using the go distpack archive and missing a VERSION file in the source
+  # but we can use go env to get the same information
+  # https://github.com/NixOS/nixpkgs/pull/358316#discussion_r1855322027
+  patches = [ ./info_module-gover.patch ];
+
+  vendorHash = "sha256-omjHRZB/4VzPhc6RrFY11s6BRD69+Y4RRZ2XdeKbZf0=";
+
+  ldflags = [ "-s" ];
+
+  passthru.tests.version = testers.testVersion {
+    package = golds;
+    version = "v${version}";
+  };
+
+  meta = {
+    description = "Experimental Go local docs server/generator and code reader implemented with some fresh ideas";
+    homepage = "https://github.com/go101/golds";
+    license = lib.licenses.mit;
+    platforms = lib.platforms.unix;
+    maintainers = with lib.maintainers; [ phanirithvij ];
+    mainProgram = "golds";
+  };
+}