Complete rewrite to use golang/dep for source deduction

Gopkg.toml

@@ -26,16 +26,9 @@
 
 
 [[constraint]]
+  branch = "master"
   name = "github.com/golang/dep"
-  version = "0.4.1"
-
-[[constraint]]
-  name = "github.com/pelletier/go-toml"
-  version = "1.1.0"
-
-[[constraint]]
-  name = "github.com/pkg/errors"
-  version = "0.8.0"
+  source = "https://github.com/CrushedPixel/dep"
 
 [prune]
   go-tests = true

deps.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"fmt"
+)
+
+const depNixFormat = `
+  {
+    goPackagePath  = "%s";
+    fetch = {
+      type = "%s";
+      url = "%s";
+      rev =  "%s";
+      sha256 = "%s";
+    };
+  }`
+
+// Dep represents a project dependency
+// to write to deps.nix.
+type Dep struct {
+	PackagePath string
+	VCS         string
+	URL         string
+	Revision    string
+	SHA256      string
+}
+
+// toNix converts d into a nix set
+// for use in the generated deps.nix.
+func (d *Dep) toNix() string {
+	return fmt.Sprintf(depNixFormat,
+		d.PackagePath, d.VCS, d.URL,
+		d.Revision, d.SHA256)
+}
+
+const depsFileHeader = `# file generated from Gopkg.lock using dep2nix (https://github.com/nixcloud/dep2nix)
+[`
+const depsFileFooter = `
+]`
+
+type Deps []*Dep
+
+// toNix converts d into a deps.nix file
+// for use with pkgs.buildGoPackage.
+func (d Deps) toNix() string {
+	nix := depsFileHeader
+	for _, dep := range d {
+		nix += dep.toNix()
+	}
+	nix += depsFileFooter
+	return nix
+}

deps.nix

@@ -46,9 +46,9 @@
       goPackagePath  = "github.com/golang/dep";
       fetch = {
         type = "git";
-        url = "https://github.com/golang/dep";
-        rev =  "37d9ea0ac16f0e0a05afc3b60e1ac8c364b6c329";
-        sha256 = "0183xq5l4sinnclynv6xi85vmk69mqpy5wjfsgh8bxwziq3vkd7y";
+        url = "https://github.com/CrushedPixel/dep";
+        rev =  "fa9f32339c8855ebe7e7bc66e549036a7e06d37a";
+        sha256 = "1knaxs1ji1b0b68393f24r8qzvahxz9x7rqwc8jsjlshvpz0hlm6";
       };
     }