Use Go modules (jaegertracing#424)

* Use Go modules

Signed-off-by: Yuri Shkuro <ys@uber.com>

* Update docs

Signed-off-by: Yuri Shkuro <ys@uber.com>

.travis.yml

@@ -11,13 +11,19 @@ matrix:
     env:
     - TESTS=true
     - COVERAGE=true
+    - GO111MODULE=on
   - go: 1.12.x
     env:
     - CROSSDOCK=true
+    - GO111MODULE=on
   - go: 1.12.x
     env:
     - TESTS=true
     - USE_DEP=true
+  - go: 1.12.x
+    env:
+    - TESTS=true
+    - USE_GLIDE=true
   - go: 1.11.x
     env:
     - TESTS=true

CONTRIBUTING.md

@@ -19,23 +19,20 @@ file for details.
 
 ## Getting Started
 
-This library uses [glide](https://github.com/Masterminds/glide) to manage dependencies.
+This library uses Go modules to manage dependencies.
 
-To get started, make sure you clone the Git repository into the correct location
-`github.com/uber/jaeger-client-go` relative to `$GOPATH`:
+To get started, clone the Git repository into any location (does not need to be under `$GOPATH`):
 
 ```
-mkdir -p $GOPATH/src/github.com/uber
-cd $GOPATH/src/github.com/uber
+cd you-dev-root
 git clone git@github.com:jaegertracing/jaeger-client-go.git jaeger-client-go
 cd jaeger-client-go
+git submodule update --init --recursive
 ```
 
-Then install dependencies and run the tests:
+Go will download dependencies automatically when you run the tests:
 
 ```
-git submodule update --init --recursive
-glide install
 make test
 ```
 
@@ -45,13 +42,13 @@ This projects follows the following pattern for grouping imports in Go files:
   * imports from standard library
   * imports from other projects
   * imports from `jaeger-client-go` project
-  
+
 For example:
 
 ```go
 import (
 	"fmt"
- 
+
 	"github.com/uber/jaeger-lib/metrics"
 	"go.uber.org/zap"
 

Makefile

@@ -1,5 +1,5 @@
 PROJECT_ROOT=github.com/uber/jaeger-client-go
-PACKAGES := $(shell glide novendor | grep -v -e ./thrift-gen/... -e ./thrift/...)
+PACKAGES := $(go list ./... | awk -F/ 'NR>1 {print "./"$4"/..."}' | grep -v -e ./thrift-gen/... -e ./thrift/... | sort -u)
 # all .go files that don't exist in hidden directories
 ALL_SRC := $(shell find . -name "*.go" | grep -v -e vendor -e thrift-gen -e ./thrift/ \
         -e ".*/\..*" \
@@ -56,19 +56,22 @@ lint:
 
 .PHONY: install
 install:
-	glide --version || go get github.com/Masterminds/glide
 ifeq ($(USE_DEP),true)
 	dep ensure
-else
+endif
+ifeq ($(USE_GLIDE),true)
+	glide --version || go get github.com/Masterminds/glide
 	glide install
 endif
 
 
 .PHONY: cover
 cover:
-	./scripts/cover.sh $(shell go list $(PACKAGES))
-	go tool cover -html=cover.out -o cover.html
+	$(GOTEST) -cover -coverprofile cover.out $(PACKAGES)
 
+.PHONY: cover-html
+cover-html: cover
+	go tool cover -html=cover.out -o cover.html
 
 # This is not part of the regular test target because we don't want to slow it
 # down.
@@ -112,8 +115,7 @@ install-ci: install-dep-ci install
 	go get golang.org/x/lint/golint
 
 .PHONY: test-ci
-test-ci:
-	@./scripts/cover.sh $(shell go list $(PACKAGES))
+test-ci: cover
 ifeq ($(CI_SKIP_LINT),true)
 	echo 'skipping lint'
 else

README.md

@@ -15,26 +15,14 @@ Please see [CONTRIBUTING.md](CONTRIBUTING.md).
 
 ## Installation
 
-We recommended using a dependency manager like [glide](https://github.com/Masterminds/glide)
-and [semantic versioning](http://semver.org/) when including this library into an application.
-For example, Jaeger backend imports this library like this:
+We recommended using [semantic versioning](http://semver.org/) when including this library into an application. For example, Jaeger backend imports this library like this (if using Dep):
 
 ```yaml
 - package: github.com/uber/jaeger-client-go
   version: ^2.7.0
 ```
 
-If you instead want to use the latest version in `master`, you can pull it via `go get`.
-Note that during `go get` you may see build errors due to incompatible dependencies, which is why
-we recommend using semantic versions for dependencies.  The error  may be fixed by running
-`make install` (it will install `glide` if you don't have it):
-
-```shell
-go get -u github.com/uber/jaeger-client-go/
-cd $GOPATH/src/github.com/uber/jaeger-client-go/
-git submodule update --init --recursive
-make install
-```
+If you instead want to use the latest version in `master`, you can pull it via `go get github.com/uber/jaeger-client-go`.
 
 ## Initialization
 
@@ -222,7 +210,7 @@ import (
 )
 
 span := opentracing.SpanFromContext(ctx)
-ext.SamplingPriority.Set(span, 1)    
+ext.SamplingPriority.Set(span, 1)
 ```
 
 #### Via HTTP Headers

go.mod

@@ -0,0 +1,21 @@
+module github.com/uber/jaeger-client-go
+
+go 1.12
+
+require (
+	github.com/crossdock/crossdock-go v0.0.0-20160816171116-049aabb0122b
+	github.com/golang/protobuf v1.3.1 // indirect
+	github.com/opentracing/opentracing-go v1.1.0
+	github.com/pkg/errors v0.8.1
+	github.com/prometheus/client_golang v0.9.1
+	github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90 // indirect
+	github.com/prometheus/common v0.2.0 // indirect
+	github.com/prometheus/procfs v0.0.0-20190322151404-55ae3d9d5573 // indirect
+	github.com/stretchr/testify v1.3.0
+	github.com/uber-go/atomic v1.3.2
+	github.com/uber/jaeger-lib v0.0.0-20190905211531-e48c2c0b31ab
+	go.uber.org/atomic v1.3.2 // indirect
+	go.uber.org/multierr v1.1.0 // indirect
+	go.uber.org/zap v1.9.1
+	golang.org/x/net v0.0.0-20190322120337-addf6b3196f6 // indirect
+)

go.sum

@@ -0,0 +1,84 @@
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+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
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+github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd h1:qMd81Ts1T2OTKmB4acZcyKaMtRnY5Y44NuXGX2GFJ1w=
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+github.com/crossdock/crossdock-go v0.0.0-20160816171116-049aabb0122b h1:WR1qVJzbvrVywhAk4kMQKRPx09AZVI0NdEdYs59iHcA=
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