From a07ce59fac14211009b7e4c8bdeb32be939476ce Mon Sep 17 00:00:00 2001
From: "jakub.coufal" <jakub.coufal@wandera.com>
Date: Mon, 16 Jul 2018 10:51:21 +0200
Subject: [PATCH] Improve memory footprint for large git index

---
 Gopkg.lock         | 76 +++++++++++++++++++++++-----------------------
 Gopkg.toml         |  6 +---
 pkg/fetch/fetch.go |  1 +
 3 files changed, 40 insertions(+), 43 deletions(-)

diff --git a/Gopkg.lock b/Gopkg.lock
index 6ce3322..eee096b 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -31,8 +31,8 @@
     ".",
     "log"
   ]
-  revision = "92cd0815dd1a028a6e69faee9757c7436238e252"
-  version = "v2.6.1"
+  revision = "3eb9738c1697594ea6e71a7156a9bb32ed216cf0"
+  version = "v2.8.0"
 
 [[projects]]
   name = "github.com/emirpasic/gods"
@@ -54,28 +54,28 @@
   version = "v1.0.0"
 
 [[projects]]
-  branch = "master"
   name = "github.com/go-openapi/jsonpointer"
   packages = ["."]
   revision = "3a0015ad55fa9873f41605d3e8f28cd279c32ab2"
+  version = "0.15.0"
 
 [[projects]]
-  branch = "master"
   name = "github.com/go-openapi/jsonreference"
   packages = ["."]
   revision = "3fb327e6747da3043567ee86abd02bb6376b6be2"
+  version = "0.15.0"
 
 [[projects]]
-  branch = "master"
   name = "github.com/go-openapi/spec"
   packages = ["."]
-  revision = "bcff419492eeeb01f76e77d2ebc714dc97b607f5"
+  revision = "bce47c9386f9ecd6b86f450478a80103c3fe1402"
+  version = "0.15.0"
 
 [[projects]]
-  branch = "master"
   name = "github.com/go-openapi/swag"
   packages = ["."]
-  revision = "811b1089cde9dad18d4d0c2d09fbdbf28dbd27a5"
+  revision = "2b0bd4f193d011c203529df626a65d63cb8a79e8"
+  version = "0.15.0"
 
 [[projects]]
   name = "github.com/gogo/protobuf"
@@ -83,8 +83,8 @@
     "proto",
     "sortkeys"
   ]
-  revision = "1adfc126b41513cc696b209667c8656ea7aac67c"
-  version = "v1.0.0"
+  revision = "7d68e886eac4f7e34d0d82241a6273d6c304c5cf"
+  version = "v1.1.0"
 
 [[projects]]
   branch = "master"
@@ -101,8 +101,8 @@
     "ptypes/duration",
     "ptypes/timestamp"
   ]
-  revision = "925541529c1fa6821df4e44ce2723319eb2be768"
-  version = "v1.0.0"
+  revision = "b4deda0973fb4c70b50d226b1af49f3da59f5265"
+  version = "v1.1.0"
 
 [[projects]]
   branch = "master"
@@ -123,8 +123,8 @@
     "compiler",
     "extensions"
   ]
-  revision = "ee43cbb60db7bd22502942cccbc39059117352ab"
-  version = "v0.1.0"
+  revision = "7c663266750e7d82587642f65e60bc4083f1f84e"
+  version = "v0.2.0"
 
 [[projects]]
   branch = "master"
@@ -144,8 +144,8 @@
 [[projects]]
   name = "github.com/imdario/mergo"
   packages = ["."]
-  revision = "9d5f1277e9a8ed20c3684bda8fde67c05628518c"
-  version = "v0.3.4"
+  revision = "9316a62528ac99aaecb4e47eadd6dc8aa6533d58"
+  version = "v0.3.5"
 
 [[projects]]
   name = "github.com/inconshreveable/mousetrap"
@@ -162,8 +162,8 @@
 [[projects]]
   name = "github.com/json-iterator/go"
   packages = ["."]
-  revision = "ca39e5af3ece67bbcda3d0f4f56a8e24d9f2dad4"
-  version = "1.1.3"
+  revision = "ab8a2e0c74be9d3be70b3184d9acc634935ded82"
+  version = "1.1.4"
 
 [[projects]]
   name = "github.com/juju/ratelimit"
@@ -185,13 +185,13 @@
     "jlexer",
     "jwriter"
   ]
-  revision = "8b799c424f57fa123fc63a99d6383bc6e4c02578"
+  revision = "3fdea8d05856a0c8df22ed4bc71b3219245e4485"
 
 [[projects]]
   branch = "master"
   name = "github.com/mitchellh/go-homedir"
   packages = ["."]
-  revision = "b8bc1bf767474819792c23f32d8286a45736f1c6"
+  revision = "3864e76763d94a6df2f9960b16a20a33da9f9a66"
 
 [[projects]]
   name = "github.com/modern-go/concurrent"
@@ -202,8 +202,8 @@
 [[projects]]
   name = "github.com/modern-go/reflect2"
   packages = ["."]
-  revision = "1df9eeb2bb81f327b96228865c5687bc2194af3f"
-  version = "1.0.0"
+  revision = "4b7aa43c6742a2c18fdef89dd197aaae7dac7ccd"
+  version = "1.0.1"
 
 [[projects]]
   name = "github.com/pelletier/go-buffruneio"
@@ -247,8 +247,8 @@
     ".",
     "doc"
   ]
-  revision = "a1f051bc3eba734da4772d60e2d677f47cf93ef4"
-  version = "v0.0.2"
+  revision = "ef82de70bb3f60c65fb8eebacbb2d122ef517385"
+  version = "v0.0.3"
 
 [[projects]]
   name = "github.com/spf13/pflag"
@@ -268,10 +268,10 @@
   version = "v1.3.0"
 
 [[projects]]
-  branch = "master"
   name = "github.com/xanzy/ssh-agent"
   packages = ["."]
-  revision = "ba9c9e33906f58169366275e3450db66139a31a9"
+  revision = "640f0ab560aeb89d523bb6ac322b1244d5c3796c"
+  version = "v0.2.0"
 
 [[projects]]
   branch = "master"
@@ -282,6 +282,7 @@
     "ed25519",
     "ed25519/internal/edwards25519",
     "internal/chacha20",
+    "internal/subtle",
     "openpgp",
     "openpgp/armor",
     "openpgp/elgamal",
@@ -294,7 +295,7 @@
     "ssh/knownhosts",
     "ssh/terminal"
   ]
-  revision = "e73bf333ef8920dbb52ad18d4bd38ad9d9bc76d7"
+  revision = "a49355c7e3f8fe157a85be2f77e6e269a0f89602"
 
 [[projects]]
   branch = "master"
@@ -304,10 +305,9 @@
     "http/httpguts",
     "http2",
     "http2/hpack",
-    "idna",
-    "lex/httplex"
+    "idna"
   ]
-  revision = "5f9ae10d9af5b1c89ae6904293b14b064d4ada23"
+  revision = "d0887baf81f4598189d4e12a37c6da86f0bba4d0"
 
 [[projects]]
   branch = "master"
@@ -316,7 +316,7 @@
     "unix",
     "windows"
   ]
-  revision = "79b0c6888797020a994db17c8510466c72fe75d9"
+  revision = "ac767d655b305d4e9612f5f6e33120b9176c4ad4"
 
 [[projects]]
   name = "golang.org/x/text"
@@ -355,8 +355,8 @@
     "osfs",
     "util"
   ]
-  revision = "df053870ae7070b0350624ba5a22161ba3796cc0"
-  version = "v4.1.1"
+  revision = "83cf655d40b15b427014d7875d10850f96edba14"
+  version = "v4.2.0"
 
 [[projects]]
   name = "gopkg.in/src-d/go-git.v4"
@@ -391,7 +391,7 @@
     "plumbing/transport/ssh",
     "storage",
     "storage/filesystem",
-    "storage/filesystem/internal/dotgit",
+    "storage/filesystem/dotgit",
     "storage/memory",
     "utils/binary",
     "utils/diff",
@@ -402,8 +402,8 @@
     "utils/merkletrie/internal/frame",
     "utils/merkletrie/noder"
   ]
-  revision = "b30763cb64afa91c016b23e905af0a378eb1b76d"
-  version = "v4.3.1"
+  revision = "3bd5e82b2512d85becae9677fa06b5a973fd4cfb"
+  version = "v4.5.0"
 
 [[projects]]
   name = "gopkg.in/warnings.v0"
@@ -588,11 +588,11 @@
     "pkg/common",
     "pkg/util/proto"
   ]
-  revision = "1e45fb05b06309c0d807d0930e1a81fe0a1cd4b8"
+  revision = "0cf8f7e6ed1d2e3d47d02e3b6e559369af24d803"
 
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "8d62002ccf4dad7deb18c6519fec8befe50a4362463dd4583d6fce79d10a4d58"
+  inputs-digest = "10e440025c8600f5c0e6952033d862fe15482eee9aedbd94a458a79b4218548c"
   solver-name = "gps-cdcl"
   solver-version = 1
diff --git a/Gopkg.toml b/Gopkg.toml
index 290a920..a1088e2 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -14,14 +14,10 @@
   name = "k8s.io/api"
   version = "kubernetes-1.9.1"
 
-[[constraint]]
-  name = "github.com/go-resty/resty"
-  version = "1.3.0"
-
 [[constraint]]
   name = "github.com/spf13/cobra"
   version = "0.0.2"
 
 [[constraint]]
   name = "gopkg.in/src-d/go-git.v4"
-  version = "v4.3.1"
+  version = "v4.5.0"
diff --git a/pkg/fetch/fetch.go b/pkg/fetch/fetch.go
index 83d8244..be63a39 100644
--- a/pkg/fetch/fetch.go
+++ b/pkg/fetch/fetch.go
@@ -49,6 +49,7 @@ func (f *fetcher) Fetch() (*object.Commit, error) {
 		r, err = git.PlainClone(f.directory, false, &git.CloneOptions{
 			URL:           f.url,
 			Auth:          f.auth,
+			NoCheckout:    true,
 			ReferenceName: plumbing.ReferenceName(fmt.Sprintf("refs/heads/%s", f.branch)),
 		})
 		if err != nil {