Avoid vendoring tooling as much as possible

Gopkg.lock

@@ -1,42 +1,16 @@
-# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
-
-
+# This was generated by ./generate-vendor.sh
 [[projects]]
   branch = "master"
   name = "golang.org/x/crypto"
-  packages = [
-    "chacha20poly1305",
-    "internal/chacha20",
-    "poly1305",
-    "blake2s",
-    "curve25519"
-  ]
   revision = "1a580b3eff7814fc9b40602fd35256c63b50f491"
 
 [[projects]]
   branch = "master"
   name = "golang.org/x/net"
-  packages = [
-    "bpf",
-    "internal/iana",
-    "internal/socket",
-    "ipv4",
-    "ipv6"
-  ]
   revision = "2491c5de3490fced2f6cff376127c667efeed857"
 
 [[projects]]
   branch = "master"
   name = "golang.org/x/sys"
-  packages = [
-    "cpu",
-    "unix"
-  ]
   revision = "7c87d13f8e835d2fb3a70a2912c811ed0c1d241b"
 
-[solve-meta]
-  analyzer-name = "dep"
-  analyzer-version = 1
-  inputs-digest = "831221f90003ef3b3b4e8277051718f6c8094b04a9cf42ebe02f25e8af866657"
-  solver-name = "gps-cdcl"
-  solver-version = 1

Gopkg.toml

@@ -1,15 +1,13 @@
+# This was generated by ./generate-vendor.sh
 [[constraint]]
   branch = "master"
   name = "golang.org/x/crypto"
 
 [[constraint]]
   branch = "master"
-  name = "golang.org/x/sys"
+  name = "golang.org/x/net"
 
 [[constraint]]
   branch = "master"
-  name = "golang.org/x/net"
+  name = "golang.org/x/sys"
 
-[prune]
-  go-tests = true
-  unused-packages = true

generate-vendor.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+echo "# This was generated by ./generate-vendor.sh" > Gopkg.lock
+echo "# This was generated by ./generate-vendor.sh" > Gopkg.toml
+
+while read -r package; do
+	cat >> Gopkg.lock <<-_EOF
+	[[projects]]
+	  branch = "master"
+	  name = "$package"
+	  revision = "$(< "$GOPATH/src/$package/.git/refs/heads/master")"
+
+	_EOF
+	cat >> Gopkg.toml <<-_EOF
+	[[constraint]]
+	  branch = "master"
+	  name = "$package"
+
+	_EOF
+done < <(sed -n 's/.*"\(golang.org\/x\/[^/]\+\)\/\?.*".*/\1/p' *.go */*.go | sort | uniq)