replace dep with go mod (#3907)

Replace sha1sum with jack's gosum and get rid of vendor-deps. Also don't compute hash on vendor/ contents. Instead hash go.sum. Disable unconvert lint check. It does not work very well with go mod. Remove update_vendor_deps once and for all. Upgrade to go 1.12 Closes: #3919 #3630
2019-03-18 13:45:25 +01:00 · 2019-03-18 13:45:25 +01:00 · 6ce4d5efd1
parent 5f92fef4b0
commit 6ce4d5efd1
20 changed files with 325 additions and 889 deletions
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@ -3,7 +3,7 @@ version: 2
 defaults: &linux_defaults
  working_directory: /go/src/github.com/cosmos/cosmos-sdk
  docker:
-    - image: circleci/golang:1.11.5
+    - image: circleci/golang:1.12.1
  environment:
    GOBIN: /tmp/workspace/bin

@ -17,7 +17,7 @@ macos_config: &macos_defaults
    xcode: "10.1.0"
  working_directory: /Users/distiller/project/src/github.com/cosmos/cosmos-sdk
  environment:
-    GO_VERSION: "1.11.5"
+    GO_VERSION: "1.12.1"

 set_macos_env: &macos_env
  run:
@ -27,6 +27,7 @@ set_macos_env: &macos_env
      echo 'export GOPATH=$HOME/project' >> $BASH_ENV
      echo 'export GOBIN=$GOPATH/bin' >> $BASH_ENV
      echo 'export PATH=$PATH:$HOME/go/bin:$GOBIN' >> $BASH_ENV
+      echo 'export GO111MODULE=on'

 ############
 #
@ -44,7 +45,6 @@ deps: &dependencies
    name: dependencies
    command: |
      export PATH="$GOBIN:$PATH"
-      make vendor-deps

 jobs:
  setup_dependencies:
@ -63,6 +63,7 @@ jobs:
          name: binaries
          command: |
            export PATH="$GOBIN:$PATH"
+            make go-mod-cache
            make install
      - persist_to_workspace:
          root: /tmp/workspace
@ -172,6 +173,7 @@ jobs:
          name: Test multi-seed Gaia simulation long
          command: |
            export PATH="$GOBIN:$PATH"
+            export GO111MODULE=on
            scripts/multisim.sh 500 50 TestFullGaiaSimulation

  test_sim_gaia_multi_seed:
@ -186,6 +188,7 @@ jobs:
          name: Test multi-seed Gaia simulation short
          command: |
            export PATH="$GOBIN:$PATH"
+            export GO111MODULE=on
            scripts/multisim.sh 50 10 TestFullGaiaSimulation

  test_cover:
@ -202,9 +205,10 @@ jobs:
          command: |
            export PATH="$GOBIN:$PATH"
            export VERSION="$(git describe --tags --long | sed 's/v\(.*\)/\1/')"
+            export GO111MODULE=on
            for pkg in $(go list ./... | grep -v github.com/cosmos/cosmos-sdk/cmd/gaia/cli_test | grep -v '/simulation' | circleci tests split --split-by=timings); do
              id=$(echo "$pkg" | sed 's|[/.]|_|g')
-              GOCACHE=off go test -timeout 8m -race -coverprofile=/tmp/workspace/profiles/$id.out -covermode=atomic -tags='ledger test_ledger_mock' "$pkg" | tee "/tmp/logs/$id-$RANDOM.log"
+              go test -timeout 8m -race -coverprofile=/tmp/workspace/profiles/$id.out -covermode=atomic -tags='ledger test_ledger_mock' "$pkg" | tee "/tmp/logs/$id-$RANDOM.log"
            done
      - persist_to_workspace:
          root: /tmp/workspace
@ -253,7 +257,7 @@ jobs:
        GOPATH: /home/circleci/.go_workspace/
        GOOS: linux
        GOARCH: amd64
-        GO_VERSION: "1.11.5"
+        GO_VERSION: "1.12.1"
      parallelism: 1
      steps:
        - checkout
@ -268,7 +272,6 @@ jobs:
              popd
              set -x
              make tools
-              make vendor-deps
              make build-linux
              make localnet-start
              ./scripts/localnet-blocks-test.sh 40 5 10 localhost
@ -315,7 +318,6 @@ jobs:
          command: |
            source $BASH_ENV
            make tools
-            make vendor-deps
            make install
      - run:
          name: Integration tests
--- a/.gitignore
+++ b/.gitignore
@ -10,8 +10,6 @@

 # Build
 vendor
-vendor-deps
-.vendor-new
 build
 tools/bin/*
 examples/build/*
--- a/.pending/improvements/sdk/3907-Drop-dep-in-fav
+++ b/.pending/improvements/sdk/3907-Drop-dep-in-fav
@ -0,0 +1,3 @@
+#3907: dep -> go mod migration
+- Drop dep in favor of go modules.
+- Upgrade to Go 1.12.1.
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@ -100,21 +100,15 @@ Please don't make Pull Requests to `master`.

 ## Dependencies

-We use [dep](https://github.com/golang/dep) to manage dependencies.
+We use [Go 1.11 Modules](https://github.com/golang/go/wiki/Modules) to manage
+dependency versions.

-That said, the master branch of every Cosmos repository should just build
-with `go get`, which means they should be kept up-to-date with their
-dependencies so we can get away with telling people they can just `go get` our
-software.
+The master branch of every Cosmos repository should just build with `go get`,
+which means they should be kept up-to-date with their dependencies so we can
+get away with telling people they can just `go get` our software.

 Since some dependencies are not under our control, a third party may break our
-build, in which case we can fall back on `dep ensure` (or `make
-get_vendor_deps`). Even for dependencies under our control, dep helps us to
-keep multiple repos in sync as they evolve. Anything with an executable, such
-as apps, tools, and the core, should use dep.
-
-Run `dep status` to get a list of vendor dependencies that may not be
-up-to-date.
+build, in which case we can fall back on `go mod tidy -v`.

 ## Testing

--- a/2
+++ b/2
@ -16,8 +16,6 @@ COPY . .
 # Install minimum necessary dependencies, build Cosmos SDK, remove packages
 RUN apk add --no-cache $PACKAGES && \
    make tools && \
-    make vendor-deps && \
-    make build && \
    make install

 # Final image
--- a/Gopkg.lock
+++ b/Gopkg.lock
@ -1,725 +0,0 @@
-# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
-
-
-[[projects]]
-  branch = "master"
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-  packages = ["."]
-  pruneopts = "UT"
-  revision = "a05967ea095d81c8fe4833776774cfaff8e5036c"
-
-[[projects]]
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-
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-  revision = "94f6ae3ed3bceceafa716478c5fbf8d29ca601a1"
-  version = "v1.1.0"
-
-[[projects]]
-  digest = "1:c1b1102241e7f645bc8e0c22ae352e8f0dc6484b6cb4d132fa9f24174e0119e2"
-  name = "github.com/spf13/pflag"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "298182f68c66c05229eb03ac171abe6e309ee79a"
-  version = "v1.0.3"
-
-[[projects]]
-  digest = "1:ba07ec7953d565ac57a11b123a3bf0c8e848f2c7f637fccb0f9ce4f9e489d69a"
-  name = "github.com/spf13/viper"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "a1b837276271029e31f796ae5d03ba9ffb017244"
-  version = "v1.0.3"
-
-[[projects]]
-  digest = "1:7e8d267900c7fa7f35129a2a37596e38ed0f11ca746d6d9ba727980ee138f9f6"
-  name = "github.com/stretchr/testify"
-  packages = [
-    "assert",
-    "require",
-  ]
-  pruneopts = "UT"
-  revision = "12b6f73e6084dad08a7c6e575284b177ecafbc71"
-  version = "v1.2.1"
-
-[[projects]]
-  digest = "1:b3cfb8d82b1601a846417c3f31c03a7961862cb2c98dcf0959c473843e6d9a2b"
-  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",
-  ]
-  pruneopts = "UT"
-  revision = "c4c61651e9e37fa117f53c5a906d3b63090d8445"
-
-[[projects]]
-  digest = "1:83f5e189eea2baad419a6a410984514266ff690075759c87e9ede596809bd0b8"
-  name = "github.com/tendermint/btcd"
-  packages = ["btcec"]
-  pruneopts = "UT"
-  revision = "80daadac05d1cd29571fccf27002d79667a88b58"
-  version = "v0.1.1"
-
-[[projects]]
-  digest = "1:ad9c4c1a4e7875330b1f62906f2830f043a23edb5db997e3a5ac5d3e6eadf80a"
-  name = "github.com/tendermint/go-amino"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "dc14acf9ef15f85828bfbc561ed9dd9d2a284885"
-  version = "v0.14.1"
-
-[[projects]]
-  digest = "1:1bb088f6291e5426e3874a60bca0e481a91a5633395d7e0c427ec3e49b626e7b"
-  name = "github.com/tendermint/iavl"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "ac7c35c12e8633a1e9fd0b52a00b900b40f32cd3"
-  version = "v0.12.1"
-
-[[projects]]
-  digest = "1:088088db7ae1174ce66abecbca6924e969cd05632053532ed7dadc7cc35f7885"
-  name = "github.com/tendermint/tendermint"
-  packages = [
-    "abci/client",
-    "abci/example/code",
-    "abci/example/counter",
-    "abci/example/kvstore",
-    "abci/server",
-    "abci/types",
-    "blockchain",
-    "cmd/tendermint/commands",
-    "config",
-    "consensus",
-    "consensus/types",
-    "crypto",
-    "crypto/armor",
-    "crypto/ed25519",
-    "crypto/encoding/amino",
-    "crypto/merkle",
-    "crypto/multisig",
-    "crypto/multisig/bitarray",
-    "crypto/secp256k1",
-    "crypto/tmhash",
-    "crypto/xsalsa20symmetric",
-    "evidence",
-    "libs/autofile",
-    "libs/bech32",
-    "libs/cli",
-    "libs/cli/flags",
-    "libs/clist",
-    "libs/common",
-    "libs/db",
-    "libs/events",
-    "libs/fail",
-    "libs/flowrate",
-    "libs/log",
-    "libs/pubsub",
-    "libs/pubsub/query",
-    "lite",
-    "lite/client",
-    "lite/errors",
-    "lite/proxy",
-    "mempool",
-    "node",
-    "p2p",
-    "p2p/conn",
-    "p2p/pex",
-    "p2p/upnp",
-    "privval",
-    "proxy",
-    "rpc/client",
-    "rpc/core",
-    "rpc/core/types",
-    "rpc/grpc",
-    "rpc/lib/client",
-    "rpc/lib/server",
-    "rpc/lib/types",
-    "state",
-    "state/txindex",
-    "state/txindex/kv",
-    "state/txindex/null",
-    "types",
-    "types/time",
-    "version",
-  ]
-  pruneopts = "UT"
-  revision = "v0.31.0-dev0"
-
-[[projects]]
-  digest = "1:b73f5e117bc7c6e8fc47128f20db48a873324ad5cfeeebfc505e85c58682b5e4"
-  name = "github.com/zondax/hid"
-  packages = ["."]
-  pruneopts = "T"
-  revision = "302fd402163c34626286195dfa9adac758334acc"
-  version = "v0.9.0"
-
-[[projects]]
-  digest = "1:f8e4c0b959174a1fa5946b12f1f2ac7ea5651bef20a9e4a8dac55dbffcaa6cd6"
-  name = "github.com/zondax/ledger-go"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "69c15f1333a9b6866e5f66096561c7d138894bc5"
-  version = "v0.8.0"
-
-[[projects]]
-  digest = "1:6f6dc6060c4e9ba73cf28aa88f12a69a030d3d19d518ef8e931879eaa099628d"
-  name = "golang.org/x/crypto"
-  packages = [
-    "bcrypt",
-    "blowfish",
-    "chacha20poly1305",
-    "curve25519",
-    "ed25519",
-    "ed25519/internal/edwards25519",
-    "hkdf",
-    "internal/chacha20",
-    "internal/subtle",
-    "nacl/box",
-    "nacl/secretbox",
-    "openpgp/armor",
-    "openpgp/errors",
-    "pbkdf2",
-    "poly1305",
-    "ripemd160",
-    "salsa20/salsa",
-  ]
-  pruneopts = "UT"
-  revision = "3764759f34a542a3aef74d6b02e35be7ab893bba"
-  source = "https://github.com/tendermint/crypto"
-
-[[projects]]
-  digest = "1:d36f55a999540d29b6ea3c2ea29d71c76b1d9853fdcd3e5c5cb4836f2ba118f1"
-  name = "golang.org/x/net"
-  packages = [
-    "context",
-    "http/httpguts",
-    "http2",
-    "http2/hpack",
-    "idna",
-    "internal/timeseries",
-    "netutil",
-    "trace",
-  ]
-  pruneopts = "UT"
-  revision = "292b43bbf7cb8d35ddf40f8d5100ef3837cced3f"
-
-[[projects]]
-  digest = "1:4bd75b1a219bc590b05c976bbebf47f4e993314ebb5c7cbf2efe05a09a184d54"
-  name = "golang.org/x/sys"
-  packages = [
-    "cpu",
-    "unix",
-  ]
-  pruneopts = "UT"
-  revision = "4e1fef5609515ec7a2cee7b5de30ba6d9b438cbf"
-
-[[projects]]
-  digest = "1:a2ab62866c75542dd18d2b069fec854577a20211d7c0ea6ae746072a1dccdd18"
-  name = "golang.org/x/text"
-  packages = [
-    "collate",
-    "collate/build",
-    "internal/colltab",
-    "internal/gen",
-    "internal/tag",
-    "internal/triegen",
-    "internal/ucd",
-    "language",
-    "secure/bidirule",
-    "transform",
-    "unicode/bidi",
-    "unicode/cldr",
-    "unicode/norm",
-    "unicode/rangetable",
-  ]
-  pruneopts = "UT"
-  revision = "f21a4dfb5e38f5895301dc265a8def02365cc3d0"
-  version = "v0.3.0"
-
-[[projects]]
-  digest = "1:077c1c599507b3b3e9156d17d36e1e61928ee9b53a5b420f10f28ebd4a0b275c"
-  name = "google.golang.org/genproto"
-  packages = ["googleapis/rpc/status"]
-  pruneopts = "UT"
-  revision = "383e8b2c3b9e36c4076b235b32537292176bae20"
-
-[[projects]]
-  digest = "1:cbc746de4662c66fd24a037501bd65aa0f8ad0bfca0c92576e0abb88864e3741"
-  name = "google.golang.org/grpc"
-  packages = [
-    ".",
-    "balancer",
-    "balancer/base",
-    "balancer/roundrobin",
-    "binarylog/grpc_binarylog_v1",
-    "codes",
-    "connectivity",
-    "credentials",
-    "credentials/internal",
-    "encoding",
-    "encoding/proto",
-    "grpclog",
-    "internal",
-    "internal/backoff",
-    "internal/binarylog",
-    "internal/channelz",
-    "internal/envconfig",
-    "internal/grpcrand",
-    "internal/grpcsync",
-    "internal/syscall",
-    "internal/transport",
-    "keepalive",
-    "metadata",
-    "naming",
-    "peer",
-    "resolver",
-    "resolver/dns",
-    "resolver/passthrough",
-    "stats",
-    "status",
-    "tap",
-  ]
-  pruneopts = "UT"
-  revision = "2fdaae294f38ed9a121193c51ec99fecd3b13eb7"
-  version = "v1.19.0"
-
-[[projects]]
-  digest = "1:4d2e5a73dc1500038e504a8d78b986630e3626dc027bc030ba5c75da257cdb96"
-  name = "gopkg.in/yaml.v2"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "51d6538a90f86fe93ac480b35f37b2be17fef232"
-  version = "v2.2.2"
-
-[solve-meta]
-  analyzer-name = "dep"
-  analyzer-version = 1
-  input-imports = [
-    "github.com/bartekn/go-bip39",
-    "github.com/bgentry/speakeasy",
-    "github.com/btcsuite/btcd/btcec",
-    "github.com/cosmos/go-bip39",
-    "github.com/cosmos/ledger-cosmos-go",
-    "github.com/gogo/protobuf/proto",
-    "github.com/golang/protobuf/proto",
-    "github.com/gorilla/mux",
-    "github.com/mattn/go-isatty",
-    "github.com/otiai10/copy",
-    "github.com/pelletier/go-toml",
-    "github.com/pkg/errors",
-    "github.com/rakyll/statik/fs",
-    "github.com/spf13/cobra",
-    "github.com/spf13/pflag",
-    "github.com/spf13/viper",
-    "github.com/stretchr/testify/assert",
-    "github.com/stretchr/testify/require",
-    "github.com/tendermint/btcd/btcec",
-    "github.com/tendermint/go-amino",
-    "github.com/tendermint/iavl",
-    "github.com/tendermint/tendermint/abci/server",
-    "github.com/tendermint/tendermint/abci/types",
-    "github.com/tendermint/tendermint/blockchain",
-    "github.com/tendermint/tendermint/cmd/tendermint/commands",
-    "github.com/tendermint/tendermint/config",
-    "github.com/tendermint/tendermint/crypto",
-    "github.com/tendermint/tendermint/crypto/armor",
-    "github.com/tendermint/tendermint/crypto/ed25519",
-    "github.com/tendermint/tendermint/crypto/encoding/amino",
-    "github.com/tendermint/tendermint/crypto/merkle",
-    "github.com/tendermint/tendermint/crypto/multisig",
-    "github.com/tendermint/tendermint/crypto/secp256k1",
-    "github.com/tendermint/tendermint/crypto/tmhash",
-    "github.com/tendermint/tendermint/crypto/xsalsa20symmetric",
-    "github.com/tendermint/tendermint/libs/bech32",
-    "github.com/tendermint/tendermint/libs/cli",
-    "github.com/tendermint/tendermint/libs/cli/flags",
-    "github.com/tendermint/tendermint/libs/common",
-    "github.com/tendermint/tendermint/libs/db",
-    "github.com/tendermint/tendermint/libs/log",
-    "github.com/tendermint/tendermint/lite",
-    "github.com/tendermint/tendermint/lite/errors",
-    "github.com/tendermint/tendermint/lite/proxy",
-    "github.com/tendermint/tendermint/node",
-    "github.com/tendermint/tendermint/p2p",
-    "github.com/tendermint/tendermint/privval",
-    "github.com/tendermint/tendermint/proxy",
-    "github.com/tendermint/tendermint/rpc/client",
-    "github.com/tendermint/tendermint/rpc/core/types",
-    "github.com/tendermint/tendermint/rpc/lib/client",
-    "github.com/tendermint/tendermint/rpc/lib/server",
-    "github.com/tendermint/tendermint/state",
-    "github.com/tendermint/tendermint/types",
-    "github.com/tendermint/tendermint/types/time",
-    "github.com/tendermint/tendermint/version",
-    "golang.org/x/crypto/bcrypt",
-  ]
-  solver-name = "gps-cdcl"
-  solver-version = 1
--- a/Gopkg.toml
+++ b/Gopkg.toml
@ -1,93 +0,0 @@
-[[constraint]]
-  name = "github.com/bgentry/speakeasy"
-  version = "~0.1.0"
-
-[[override]]
-  name = "github.com/golang/protobuf"
-  version = "=1.1.0"
-
-[[constraint]]
-  name = "github.com/mattn/go-isatty"
-  version = "~0.0.3"
-
-[[constraint]]
-  name = "github.com/spf13/cobra"
-  version = "~0.0.1"
-
-[[constraint]]
-  name = "github.com/spf13/viper"
-  version = "~1.0.0"
-
-[[constraint]]
-  name = "github.com/pkg/errors"
-  version = "=0.8.0"
-
-[[constraint]]
-  name = "github.com/stretchr/testify"
-  version = "=1.2.1"
-
-[[constraint]]
-  name = "github.com/otiai10/copy"
-  revision = "7e9a647135a142c2669943d4a4d29be015ce9392"
-
-[[override]]
-  name = "github.com/tendermint/go-amino"
-  version = "v0.14.1"
-
-[[override]]
-  name = "github.com/tendermint/iavl"
-  version = "~v0.12.0"
-
-[[override]]
-  name = "github.com/tendermint/tendermint"
-  revision = "v0.31.0-dev0"
-
-[[constraint]]
-  name = "github.com/cosmos/ledger-cosmos-go"
-  version = "=v0.9.8"
-
-## deps without releases:
-
-[[constraint]]
-  name = "github.com/btcsuite/btcd"
-  revision = "ed77733ec07dfc8a513741138419b8d9d3de9d2d"
-
-[[override]]
-  name = "golang.org/x/crypto"
-  source = "https://github.com/tendermint/crypto"
-  revision = "3764759f34a542a3aef74d6b02e35be7ab893bba"
-
-[[constraint]]
-  name = "github.com/cosmos/go-bip39"
-  revision = "52158e4697b87de16ed390e1bdaf813e581008fa"
-
-## transitive deps, with releases:
-
-[[override]]
-  name = "github.com/davecgh/go-spew"
-  version = "=v1.1.0"
-
-[[constraint]]
-  name = "github.com/rakyll/statik"
-  version = "=v0.1.4"
-
-## transitive deps, without releases:
-
-[[override]]
-  name = "github.com/syndtr/goleveldb"
-  revision = "c4c61651e9e37fa117f53c5a906d3b63090d8445"
-
-[[override]]
-  name = "golang.org/x/sys"
-  revision = "4e1fef5609515ec7a2cee7b5de30ba6d9b438cbf"
-
-[[override]]
-  name = "google.golang.org/genproto"
-  revision = "383e8b2c3b9e36c4076b235b32537292176bae20"
-
-[prune]
-  go-tests = true
-  unused-packages = true
-  [[prune.project]]
-      name = "github.com/zondax/hid"
-      unused-packages = false
--- a/67
+++ b/67
@ -5,10 +5,12 @@ COMMIT := $(shell git log -1 --format='%H')
 CAT := $(if $(filter $(OS),Windows_NT),type,cat)
 LEDGER_ENABLED ?= true
 GOTOOLS = \
-	github.com/golang/dep/cmd/dep \
 	github.com/alecthomas/gometalinter \
 	github.com/rakyll/statik
 GOBIN ?= $(GOPATH)/bin
+GOSUM := $(shell which gosum)
+
+export GO111MODULE = on

 # process build tags

@ -46,9 +48,12 @@ build_tags := $(strip $(build_tags))

 ldflags = -X github.com/cosmos/cosmos-sdk/version.Version=$(VERSION) \
 	-X github.com/cosmos/cosmos-sdk/version.Commit=$(COMMIT) \
-  -X github.com/cosmos/cosmos-sdk/version.VendorDirHash=$(shell $(CAT) vendor-deps) \
  -X "github.com/cosmos/cosmos-sdk/version.BuildTags=$(build_tags)"

+ifneq ($(GOSUM),)
+ldflags += -X github.com/cosmos/cosmos-sdk/version.VendorDirHash=$(shell $(GOSUM) go.sum)
+endif
+
 ifeq ($(WITH_CLEVELDB),yes)
  ldflags += -X github.com/cosmos/cosmos-sdk/types.DBBackend=cleveldb
 endif
@ -57,7 +62,7 @@ ldflags := $(strip $(ldflags))

 BUILD_FLAGS := -tags "$(build_tags)" -ldflags '$(ldflags)'

-all: devtools vendor-deps install test_lint test
+all: devtools install test_lint test

 # The below include contains the tools target.
 include scripts/Makefile
@ -65,36 +70,36 @@ include scripts/Makefile
 ########################################
 ### CI

-ci: devtools vendor-deps install test_cover test_lint test
+ci: devtools install test_cover test_lint test

 ########################################
 ### Build/Install

-build:
+build: go.sum
 ifeq ($(OS),Windows_NT)
-	go build $(BUILD_FLAGS) -o build/gaiad.exe ./cmd/gaia/cmd/gaiad
-	go build $(BUILD_FLAGS) -o build/gaiacli.exe ./cmd/gaia/cmd/gaiacli
+	go build -mod=readonly $(BUILD_FLAGS) -o build/gaiad.exe ./cmd/gaia/cmd/gaiad
+	go build -mod=readonly $(BUILD_FLAGS) -o build/gaiacli.exe ./cmd/gaia/cmd/gaiacli
 else
-	go build $(BUILD_FLAGS) -o build/gaiad ./cmd/gaia/cmd/gaiad
-	go build $(BUILD_FLAGS) -o build/gaiacli ./cmd/gaia/cmd/gaiacli
-	go build $(BUILD_FLAGS) -o build/gaiareplay ./cmd/gaia/cmd/gaiareplay
-	go build $(BUILD_FLAGS) -o build/gaiakeyutil ./cmd/gaia/cmd/gaiakeyutil
+	go build -mod=readonly $(BUILD_FLAGS) -o build/gaiad ./cmd/gaia/cmd/gaiad
+	go build -mod=readonly $(BUILD_FLAGS) -o build/gaiacli ./cmd/gaia/cmd/gaiacli
+	go build -mod=readonly $(BUILD_FLAGS) -o build/gaiareplay ./cmd/gaia/cmd/gaiareplay
+	go build -mod=readonly $(BUILD_FLAGS) -o build/gaiakeyutil ./cmd/gaia/cmd/gaiakeyutil
 endif

-build-linux: vendor-deps
+build-linux: go.sum
 	LEDGER_ENABLED=false GOOS=linux GOARCH=amd64 $(MAKE) build

 update_gaia_lite_docs:
 	@statik -src=client/lcd/swagger-ui -dest=client/lcd -f

-install: vendor-deps check-ledger update_gaia_lite_docs
-	go install $(BUILD_FLAGS) ./cmd/gaia/cmd/gaiad
-	go install $(BUILD_FLAGS) ./cmd/gaia/cmd/gaiacli
-	go install $(BUILD_FLAGS) ./cmd/gaia/cmd/gaiareplay
-	go install $(BUILD_FLAGS) ./cmd/gaia/cmd/gaiakeyutil
+install: go.sum check-ledger update_gaia_lite_docs
+	go install -mod=readonly $(BUILD_FLAGS) ./cmd/gaia/cmd/gaiad
+	go install -mod=readonly $(BUILD_FLAGS) ./cmd/gaia/cmd/gaiacli
+	go install -mod=readonly $(BUILD_FLAGS) ./cmd/gaia/cmd/gaiareplay
+	go install -mod=readonly $(BUILD_FLAGS) ./cmd/gaia/cmd/gaiakeyutil

-install_debug:
-	go install $(BUILD_FLAGS) ./cmd/gaia/cmd/gaiadebug
+install_debug: go.sum
+	go install -mod=readonly $(BUILD_FLAGS) ./cmd/gaia/cmd/gaiadebug

 dist:
 	@bash publish/dist.sh
@ -122,22 +127,19 @@ devtools-stamp: tools
 	@echo "--> Downloading linters (this may take awhile)"
 	$(GOPATH)/src/github.com/alecthomas/gometalinter/scripts/install.sh -b $(GOBIN)
 	go get github.com/tendermint/lint/golint
-	go install ./cmd/sdkch
+	go install -mod=readonly ./cmd/sdkch
 	touch $@

 devtools-clean: tools-clean
 	rm -f devtools-stamp

-vendor-deps: tools
-	@echo "--> Generating vendor directory via dep ensure"
-	@rm -rf .vendor-new
-	@dep ensure -v -vendor-only
-	tar -c vendor/ | sha1sum | cut -d' ' -f1 > $@
+go-mod-cache: go.sum
+	@echo "--> Download go modules to local cache"
+	@go mod download

-update_vendor_deps: tools
-	@echo "--> Running dep ensure"
-	@rm -rf .vendor-new
-	@dep ensure -v
+go.sum: tools go.mod
+	@echo "--> Generating vendor directory via go mod vendor"
+	@go mod verify

 draw_deps: tools
 	@# requires brew install graphviz or apt-get install graphviz
@ -145,7 +147,7 @@ draw_deps: tools
 	@goviz -i github.com/cosmos/cosmos-sdk/cmd/gaia/cmd/gaiad -d 2 | dot -Tpng -o dependency-graph.png

 clean:
-	rm -f devtools-stamp vendor-deps snapcraft-local.yaml
+	rm -f devtools-stamp snapcraft-local.yaml

 distclean: clean
 	rm -rf vendor/
@ -229,8 +231,7 @@ test_lint:
 	gometalinter --config=tools/gometalinter.json ./...
 	!(gometalinter --exclude /usr/lib/go/src/ --exclude client/lcd/statik/statik.go --exclude 'vendor/*' --disable-all --enable='errcheck' --vendor ./... | grep -v "client/")
 	find . -name '*.go' -type f -not -path "./vendor*" -not -path "*.git*" | xargs gofmt -d -s
-	dep status >> /dev/null
-	!(grep -n branch Gopkg.toml)
+	go mod verify

 format:
 	find . -name '*.go' -type f -not -path "./vendor*" -not -path "*.git*" -not -path "./client/lcd/statik/statik.go" | xargs gofmt -w -s
@ -297,4 +298,4 @@ build-linux build-docker-gaiadnode localnet-start localnet-stop \
 format check-ledger test_sim_gaia_nondeterminism test_sim_modules test_sim_gaia_fast \
 test_sim_gaia_custom_genesis_fast test_sim_gaia_custom_genesis_multi_seed \
 test_sim_gaia_multi_seed test_sim_gaia_import_export update_tools update_dev_tools \
-devtools-clean
+devtools-clean go-mod-cache
--- a/README.md
+++ b/README.md
@ -18,7 +18,7 @@ It is being used to build `Gaia`, the first implementation of the Cosmos Hub.
 **WARNING**: The SDK has mostly stabilized, but we are still making some
 breaking changes.

-**Note**: Requires [Go 1.11.5+](https://golang.org/dl/)
+**Note**: Requires [Go 1.12.1+](https://golang.org/dl/)

 ## Cosmos Hub Mainnet

--- a/cmd/gosum/main.go
+++ b/cmd/gosum/main.go
@ -0,0 +1,27 @@
+package main
+
+import (
+	"crypto/sha256"
+	"fmt"
+	"io"
+	"log"
+	"os"
+)
+
+// DONTCOVER
+
+// nolint: errcheck
+func main() {
+	f, err := os.Open(os.Args[1])
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer f.Close()
+
+	h := sha256.New()
+	if _, err := io.Copy(h, f); err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Printf("%x", h.Sum(nil))
+}
--- a/docs/gaia/installation.md
+++ b/docs/gaia/installation.md
@ -14,7 +14,7 @@ echo "export PATH=$PATH:$GOBIN" >> ~/.bash_profile
 ```

 ::: tip
-**Go 1.11.5+** is required for the Cosmos SDK.
+**Go 1.12.1+** is required for the Cosmos SDK.
 :::

 ### Install the binaries
--- a/go.mod
+++ b/go.mod
@ -0,0 +1,58 @@
+module github.com/cosmos/cosmos-sdk
+
+require (
+	bou.ke/monkey v1.0.1 // indirect
+	github.com/VividCortex/gohistogram v1.0.0 // indirect
+	github.com/bartekn/go-bip39 v0.0.0-20171116152956-a05967ea095d
+	github.com/bgentry/speakeasy v0.1.0
+	github.com/btcsuite/btcd v0.0.0-20190115013929-ed77733ec07d
+	github.com/cosmos/go-bip39 v0.0.0-20180618194314-52158e4697b8
+	github.com/cosmos/ledger-cosmos-go v0.9.8
+	github.com/ethereum/go-ethereum v1.8.23 // indirect
+	github.com/fortytw2/leaktest v1.3.0 // indirect
+	github.com/go-logfmt/logfmt v0.4.0 // indirect
+	github.com/gogo/protobuf v1.1.1
+	github.com/golang/protobuf v1.2.0
+	github.com/golang/snappy v0.0.1 // indirect
+	github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf // indirect
+	github.com/gorilla/mux v1.7.0
+	github.com/gorilla/websocket v1.4.0 // indirect
+	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/inconshreveable/mousetrap v1.0.0 // indirect
+	github.com/jmhodges/levigo v1.0.0 // indirect
+	github.com/magiconair/properties v1.8.0 // indirect
+	github.com/mattn/go-isatty v0.0.6
+	github.com/mitchellh/mapstructure v1.1.2 // indirect
+	github.com/otiai10/copy v0.0.0-20180813032824-7e9a647135a1
+	github.com/otiai10/curr v0.0.0-20150429015615-9b4961190c95 // indirect
+	github.com/otiai10/mint v1.2.3 // indirect
+	github.com/pelletier/go-toml v1.2.0
+	github.com/pkg/errors v0.8.0
+	github.com/prometheus/client_golang v0.9.2 // indirect
+	github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90 // indirect
+	github.com/prometheus/common v0.2.0 // indirect
+	github.com/prometheus/procfs v0.0.0-20190227231451-bbced9601137 // indirect
+	github.com/rakyll/statik v0.1.4
+	github.com/rcrowley/go-metrics v0.0.0-20180503174638-e2704e165165 // indirect
+	github.com/rs/cors v1.6.0 // indirect
+	github.com/spf13/afero v1.2.1 // indirect
+	github.com/spf13/cast v1.3.0 // indirect
+	github.com/spf13/cobra v0.0.3
+	github.com/spf13/jwalterweatherman v1.1.0 // indirect
+	github.com/spf13/pflag v1.0.3
+	github.com/spf13/viper v1.0.3
+	github.com/stretchr/testify v1.2.2
+	github.com/syndtr/goleveldb v0.0.0-20180708030551-c4c61651e9e3 // indirect
+	github.com/tendermint/btcd v0.1.1
+	github.com/tendermint/go-amino v0.14.1
+	github.com/tendermint/iavl v0.12.1
+	github.com/tendermint/lint v0.0.1 // indirect
+	github.com/tendermint/tendermint v0.31.0-dev0
+	github.com/zondax/hid v0.9.0 // indirect
+	github.com/zondax/ledger-go v0.8.0 // indirect
+	golang.org/x/crypto v0.0.0-20180904163835-0709b304e793
+	google.golang.org/grpc v1.19.0 // indirect
+	gopkg.in/yaml.v2 v2.2.2 // indirect
+)
+
+replace golang.org/x/crypto => github.com/tendermint/crypto v0.0.0-20180820045704-3764759f34a5
--- a/go.sum
+++ b/go.sum
@ -0,0 +1,171 @@
+bou.ke/monkey v1.0.1/go.mod h1:FgHuK96Rv2Nlf+0u1OOVDpCMdsWyOFmeeketDHE7LIg=
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/VividCortex/gohistogram v1.0.0/go.mod h1:Pf5mBqqDxYaXu3hDrrU+w6nw50o/4+TcAqDqk/vUH7g=
+github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
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--- a/scripts/Makefile
+++ b/scripts/Makefile
@ -37,11 +37,7 @@ go_install = $(call go_get,$(1),$(2),$(3)) && cd $(GITHUBDIR)$(FS)$(1)$(FS)$(2)
 # tools
 ###
 all: tools
-tools: $(GOPATH)/bin/dep $(GOPATH)/bin/gometalinter $(GOPATH)/bin/statik $(GOPATH)/bin/goimports
-
-$(GOPATH)/bin/dep:
-	$(call go_get,golang,dep,22125cfaa6ddc71e145b1535d4b7ee9744fefff2)
-	cd $(GITHUBDIR)$(FS)golang$(FS)dep$(FS)cmd$(FS)dep && $(GO) install
+tools: $(GOPATH)/bin/gometalinter $(GOPATH)/bin/statik $(GOPATH)/bin/goimports $(GOPATH)/bin/gosum

 #v2.0.11
 $(GOPATH)/bin/gometalinter:
@ -51,9 +47,12 @@ $(GOPATH)/bin/statik:
 	$(call go_install,rakyll,statik,v0.1.5)

 $(GOPATH)/bin/goimports:
-	go get golang.org/x/tools/cmd/goimports
+	go get golang.org/x/tools/cmd/goimports@v0.0.0-20190114222345-bf090417da8b
+
+$(GOPATH)/bin/gosum:
+	go install ./cmd/gosum/

 tools-clean:
-	cd $(GOPATH)/bin && rm -f dep gometalinter statik goimports
+	cd $(GOPATH)/bin && rm -f gometalinter statik goimports gosum

-.PHONY: all clean-tools
+.PHONY: all tools-clean
--- a/scripts/install/install_sdk_arm.sh
+++ b/scripts/install/install_sdk_arm.sh
@ -4,7 +4,7 @@
 BRANCH=master
 REPO=github.com/cosmos/cosmos-sdk

-GO_VERSION=1.11.5
+GO_VERSION=1.12.1

 sudo apt-get update -y
 sudo apt-get upgrade -y
--- a/scripts/install/install_sdk_bsd.sh
+++ b/scripts/install/install_sdk_bsd.sh
@ -16,7 +16,7 @@
 set BRANCH=master
 set REPO=github.com/cosmos/cosmos-sdk

-set GO_VERSION=1.11.5
+set GO_VERSION=1.12.1

 sudo pkg update

--- a/scripts/install/install_sdk_ubuntu.sh
+++ b/scripts/install/install_sdk_ubuntu.sh
@ -7,7 +7,7 @@
 BRANCH=master
 REPO=github.com/cosmos/cosmos-sdk

-GO_VERSION=1.11.5
+GO_VERSION=1.12.1

 sudo apt-get update -y
 sudo apt-get upgrade -y
--- a/scripts/multisim.sh
+++ b/scripts/multisim.sh
@ -1,5 +1,7 @@
 #!/bin/bash

+go mod download
+
 seeds=(1 2 4 7 9 20 32 123 124 582 1893 2989 3012 4728 37827 981928 87821 891823782 989182 89182391 \
 11 22 44 77 99 2020 3232 123123 124124 582582 18931893 29892989 30123012 47284728 37827)
 blocks=$1
--- a/snapcraft.yaml
+++ b/snapcraft.yaml
@ -33,12 +33,13 @@ parts:
    build-snaps: [go]
    override-build: |
        base=`pwd`
+        export GO111MODULE=on
        export GOPATH=`pwd`/go
        export GOBIN=$GOPATH/bin
        export PATH=$GOBIN:$PATH
        cd $GOPATH/src/github.com/cosmos/cosmos-sdk
+        make go-mod-cache
        make tools
-        make vendor-deps
        make install
        mkdir $SNAPCRAFT_PART_INSTALL/bin
        cp $GOPATH/bin/gaiad $SNAPCRAFT_PART_INSTALL/bin
--- a/tools/gometalinter.json
+++ b/tools/gometalinter.json
@ -2,7 +2,7 @@
    "Linters": {
        "vet": "go tool vet -composites=false :PATH:LINE:MESSAGE"
   },
-    "Enable": ["golint", "vet", "ineffassign", "unconvert", "misspell"],
+    "Enable": ["golint", "vet", "ineffassign", "misspell"],
    "Deadline": "500s",
    "Vendor": true,
    "Cyclo": 11,