add datadog tracing decorator template

.gitignore

@@ -15,3 +15,5 @@
 # Goreleaser artifacts
 /dist
 /.gh_token
+
+.idea

README.md

@@ -18,7 +18,7 @@ With GoWrap you can easily add metrics, tracing, fallbacks, pools, and many othe
 ## Installation
 
 ```
-go get -u github.com/hexdigest/gowrap/cmd/gowrap
+go install github.com/hexdigest/gowrap/cmd/gowrap@latest
 ```
 
 ## Usage of gowrap
@@ -69,6 +69,7 @@ List of available templates:
   - [opencensus](https://github.com/hexdigest/gowrap/tree/master/templates/opencensus) instruments the source interface with opencensus spans
   - [opentelemetry](https://github.com/hexdigest/gowrap/tree/master/templates/opentelemetry) instruments the source interface with opentelemetry spans
   - [opentracing](https://github.com/hexdigest/gowrap/tree/master/templates/opentracing) instruments the source interface with opentracing spans
+  - [datadog\_tracing](https://github.com/hexdigest/gowrap/tree/master/templates/datadog_tracing) instruments the source interface with datadog spans
   - [prometheus](https://github.com/hexdigest/gowrap/tree/master/templates/prometheus) instruments the source interface with prometheus metrics
   - [ratelimit](https://github.com/hexdigest/gowrap/tree/master/templates/ratelimit) instruments the source interface with RPS limit and concurrent calls limit
   - [retry](https://github.com/hexdigest/gowrap/tree/master/templates/retry) instruments the source interface with retries

cmd_generate.go

@@ -13,9 +13,10 @@ import (
 	"unicode"
 
 	"github.com/Masterminds/sprig/v3"
+	"github.com/pkg/errors"
+
 	"github.com/hexdigest/gowrap/generator"
 	"github.com/hexdigest/gowrap/pkg"
-	"github.com/pkg/errors"
 )
 
 // GenerateCommand implements Command interface

cmd_generate_test.go

@@ -7,10 +7,11 @@ import (
 	"testing"
 	"time"
 
-	minimock "github.com/gojuno/minimock/v3"
-	"github.com/hexdigest/gowrap/generator"
+	"github.com/gojuno/minimock/v3"
 	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
+
+	"github.com/hexdigest/gowrap/generator"
 )
 
 func TestNewGenerateCommand(t *testing.T) {

cmd_template.go

@@ -72,9 +72,9 @@ func (gc *TemplateCommand) list(w io.Writer) error {
 		return errNoTemplatesFound
 	}
 
-	fmt.Fprintln(w, "List of available remote templates:")
+	_, _ = fmt.Fprintln(w, "List of available remote templates:")
 	for _, t := range templates {
-		fmt.Fprintf(w, "  %s\n", t)
+		_, _ = fmt.Fprintf(w, "  %s\n", t)
 	}
 
 	return nil
@@ -96,6 +96,6 @@ func (gc *TemplateCommand) fetch(w io.Writer, wf writeFileFunc, args []string) e
 		return err
 	}
 
-	fmt.Fprintf(w, "successfully copied from %s\n", url)
+	_, _ = fmt.Fprintf(w, "successfully copied from %s\n", url)
 	return nil
 }

go.mod

@@ -3,60 +3,78 @@ module github.com/hexdigest/gowrap
 require (
 	github.com/Masterminds/sprig/v3 v3.2.2
 	github.com/gojuno/minimock/v3 v3.0.10
-	github.com/opentracing/opentracing-go v1.1.0
+	github.com/opentracing/opentracing-go v1.2.0
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.12.1
 	github.com/sirupsen/logrus v1.8.1
-	github.com/stretchr/testify v1.7.1
-	github.com/twitchtv/twirp v5.8.0+incompatible
+	github.com/stretchr/testify v1.8.1
+	github.com/twitchtv/twirp v8.1.1+incompatible
 	go.elastic.co/apm/v2 v2.2.0
 	go.opencensus.io v0.23.0
 	go.opentelemetry.io/otel v1.0.1
 	go.opentelemetry.io/otel/trace v1.0.1
-	golang.org/x/tools v0.1.11-0.20220316014157-77aa08bb151a
+	golang.org/x/tools v0.4.0
 	google.golang.org/grpc v1.45.0
+	gopkg.in/DataDog/dd-trace-go.v1 v1.47.0
 )
 
 require (
+	github.com/DataDog/datadog-agent/pkg/obfuscate v0.0.0-20211129110424-6491aa3bf583 // indirect
+	github.com/DataDog/datadog-agent/pkg/remoteconfig/state v0.42.0-rc.1 // indirect
+	github.com/DataDog/datadog-go v4.8.2+incompatible // indirect
+	github.com/DataDog/datadog-go/v5 v5.0.2 // indirect
+	github.com/DataDog/go-tuf v0.3.0--fix-localmeta-fork // indirect
+	github.com/DataDog/sketches-go v1.2.1 // indirect
 	github.com/Masterminds/goutils v1.1.1 // indirect
 	github.com/Masterminds/semver/v3 v3.1.1 // indirect
+	github.com/Microsoft/go-winio v0.5.1 // indirect
 	github.com/armon/go-radix v1.0.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.1.2 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/dgraph-io/ristretto v0.1.0 // indirect
+	github.com/dustin/go-humanize v1.0.0 // indirect
 	github.com/elastic/go-licenser v0.4.0 // indirect
 	github.com/elastic/go-sysinfo v1.7.1 // indirect
 	github.com/elastic/go-windows v1.0.1 // indirect
+	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
-	github.com/google/go-cmp v0.5.7 // indirect
 	github.com/google/uuid v1.3.0 // indirect
 	github.com/huandu/xstrings v1.3.2 // indirect
 	github.com/imdario/mergo v0.3.12 // indirect
 	github.com/jcchavezs/porto v0.1.0 // indirect
 	github.com/joeshaw/multierror v0.0.0-20140124173710-69b34d4ec901 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
 	github.com/kr/pretty v0.3.0 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
 	github.com/mitchellh/copystructure v1.1.2 // indirect
 	github.com/mitchellh/reflectwalk v1.0.1 // indirect
+	github.com/philhofer/fwd v1.1.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/prometheus/client_model v0.2.0 // indirect
 	github.com/prometheus/common v0.32.1 // indirect
 	github.com/prometheus/procfs v0.7.3 // indirect
 	github.com/rogpeppe/go-internal v1.8.1 // indirect
 	github.com/santhosh-tekuri/jsonschema v1.2.4 // indirect
+	github.com/secure-systems-lab/go-securesystemslib v0.4.0 // indirect
 	github.com/shopspring/decimal v1.2.0 // indirect
 	github.com/spf13/cast v1.4.1 // indirect
+	github.com/tinylib/msgp v1.1.6 // indirect
 	go.elastic.co/fastjson v1.1.0 // indirect
+	go4.org/intern v0.0.0-20211027215823-ae77deb06f29 // indirect
+	go4.org/unsafe/assume-no-moving-gc v0.0.0-20220617031537-928513b29760 // indirect
 	golang.org/x/crypto v0.0.0-20220411220226-7b82a4e95df4 // indirect
-	golang.org/x/mod v0.6.0-dev.0.20220106191415-9b9b3d81d5e3 // indirect
-	golang.org/x/net v0.0.0-20220412020605-290c469a71a5 // indirect
-	golang.org/x/sys v0.0.0-20220422013727-9388b58f7150 // indirect
+	golang.org/x/mod v0.7.0 // indirect
+	golang.org/x/sys v0.3.0 // indirect
+	golang.org/x/time v0.0.0-20211116232009-f0f3c7e86c11 // indirect
 	golang.org/x/xerrors v0.0.0-20220411194840-2f41105eb62f // indirect
 	google.golang.org/genproto v0.0.0-20220407144326-9054f6ed7bac // indirect
 	google.golang.org/protobuf v1.28.0 // indirect
-	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 	howett.net/plist v1.0.0 // indirect
+	inet.af/netaddr v0.0.0-20220617031823-097006376321 // indirect
 )
 
-go 1.17
+go 1.19