Use cache to do `dep ensure` faster in circleci (#17)

Use cache to do `dep ensure` faster in circleci.

2 files changed, 74 insertions, 4 deletions

diff --git a/.circleci/config.yml b/.circleci/config.yml
index d0d618d..7611454 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -10,9 +10,23 @@ jobs:
 
     steps:
       - checkout
+      - restore_cache:
+          keys:
+            - v1-Gopkg.lock-{{ .Branch }}-{{ checksum "Gopkg.toml" }}
+      - restore_cache:
+          keys:
+            - v1-vendor-{{ .Branch }}-{{ checksum "Gopkg.lock" }}
       - run: bin/install_tools.sh
       - run: make check-format
       - run: dep ensure
+      - save_cache:
+          key: v1-Gopkg.lock-{{ .Branch }}-{{ checksum "Gopkg.toml" }}
+          paths:
+            - Gopkg.lock
+      - save_cache:
+          key: v1-vendor-{{ .Branch }}-{{ checksum "Gopkg.lock" }}
+          paths:
+            - vendor
       - run: make lint
       - run: make vet
       - run: make test
diff --git a/Gopkg.lock b/Gopkg.lock
index e2c0896..f6ae37f 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -2,50 +2,106 @@
 
 
 [[projects]]
+  digest = "1:a2c1d0e43bd3baaa071d1b9ed72c27d78169b2b269f71c105ac4ba34b1be4a39"
   name = "github.com/davecgh/go-spew"
   packages = ["spew"]
+  pruneopts = "UT"
   revision = "346938d642f2ec3594ed81d874461961cd0faa76"
   version = "v1.1.0"
 
 [[projects]]
   branch = "master"
+  digest = "1:4a0c6bb4805508a6287675fac876be2ac1182539ca8a32468d8128882e9d5009"
   name = "github.com/golang/snappy"
   packages = ["."]
+  pruneopts = "UT"
   revision = "2e65f85255dbc3072edf28d6b5b8efc472979f5a"
 
 [[projects]]
+  digest = "1:b56c589214f01a5601e0821387db484617392d0042f26234bf2da853a2f498a1"
   name = "github.com/naoina/go-stringutil"
   packages = ["."]
+  pruneopts = "UT"
   revision = "6b638e95a32d0c1131db0e7fe83775cbea4a0d0b"
   version = "v0.1.0"
 
 [[projects]]
+  digest = "1:ce268ac5ab983535f7372bf9d4f8e4807f51ea961f71510d73e433e164208e34"
   name = "github.com/naoina/toml"
-  packages = [".","ast"]
+  packages = [
+    ".",
+    "ast",
+  ]
+  pruneopts = "UT"
   revision = "e6f5723bf2a66af014955e0888881314cf294129"
   version = "v0.1.1"
 
 [[projects]]
+  digest = "1:0028cb19b2e4c3112225cd871870f2d9cf49b9b4276531f03438a88e94be86fe"
   name = "github.com/pmezard/go-difflib"
   packages = ["difflib"]
+  pruneopts = "UT"
   revision = "792786c7400a136282c1664665ae0a8db921c6c2"
   version = "v1.0.0"
 
 [[projects]]
+  digest = "1:38aee443dc6b1610660b68fb6ff259315aa4219c4772da84a410029a06bc1f76"
   name = "github.com/stretchr/testify"
-  packages = ["assert","require","suite"]
+  packages = [
+    "assert",
+    "require",
+    "suite",
+  ]
+  pruneopts = "UT"
   revision = "f35b8ab0b5a2cef36673838d662e249dd9c94686"
   version = "v1.2.2"
 
 [[projects]]
   branch = "master"
+  digest = "1:922191411ad8f61bcd8018ac127589bb489712c1d1a0ab2497aca4b16de417d2"
   name = "github.com/syndtr/goleveldb"
-  packages = ["leveldb","leveldb/cache","leveldb/comparer","leveldb/errors","leveldb/filter","leveldb/iterator","leveldb/journal","leveldb/memdb","leveldb/opt","leveldb/storage","leveldb/table","leveldb/util"]
+  packages = [
+    "leveldb",
+    "leveldb/cache",
+    "leveldb/comparer",
+    "leveldb/errors",
+    "leveldb/filter",
+    "leveldb/iterator",
+    "leveldb/journal",
+    "leveldb/memdb",
+    "leveldb/opt",
+    "leveldb/storage",
+    "leveldb/table",
+    "leveldb/util",
+  ]
+  pruneopts = "UT"
   revision = "c4c61651e9e37fa117f53c5a906d3b63090d8445"
 
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "fdad0896fd0b14f0f84c7b77ee9d6335968e200efa7d48562ed6e4a80b923d79"
+  input-imports = [
+    "github.com/davecgh/go-spew/spew",
+    "github.com/golang/snappy",
+    "github.com/naoina/go-stringutil",
+    "github.com/naoina/toml",
+    "github.com/naoina/toml/ast",
+    "github.com/pmezard/go-difflib/difflib",
+    "github.com/stretchr/testify/assert",
+    "github.com/stretchr/testify/require",
+    "github.com/stretchr/testify/suite",
+    "github.com/syndtr/goleveldb/leveldb",
+    "github.com/syndtr/goleveldb/leveldb/cache",
+    "github.com/syndtr/goleveldb/leveldb/comparer",
+    "github.com/syndtr/goleveldb/leveldb/errors",
+    "github.com/syndtr/goleveldb/leveldb/filter",
+    "github.com/syndtr/goleveldb/leveldb/iterator",
+    "github.com/syndtr/goleveldb/leveldb/journal",
+    "github.com/syndtr/goleveldb/leveldb/memdb",
+    "github.com/syndtr/goleveldb/leveldb/opt",
+    "github.com/syndtr/goleveldb/leveldb/storage",
+    "github.com/syndtr/goleveldb/leveldb/table",
+    "github.com/syndtr/goleveldb/leveldb/util",
+  ]
   solver-name = "gps-cdcl"
   solver-version = 1