Build examples during testing (#99)

Makefile

@@ -25,6 +25,10 @@ build:
 	CGO_ENABLED=0 go build -ldflags="-s -w" -o $(DIST_PATH)/go-httpbin ./cmd/go-httpbin
 .PHONY: build
 
+buildexamples: build
+	./examples/build-all
+.PHONY: buildexamples
+
 buildtests:
 	CGO_ENABLED=0 go test -ldflags="-s -w" -v -c -o $(DIST_PATH)/go-httpbin.test ./httpbin
 .PHONY: buildtests
@@ -45,7 +49,7 @@ test:
 # Test command to run for continuous integration, which includes code coverage
 # based on codecov.io's documentation:
 # https://github.com/codecov/example-go/blob/b85638743b972bd0bd2af63421fe513c6f968930/README.md
-testci: build
+testci: build buildexamples
 	go test $(TEST_ARGS) $(COVERAGE_ARGS) ./...
 	git diff --exit-code
 .PHONY: testci

examples/build-all

+#!/bin/bash
+
+set -euo pipefail
+
+cd "$(dirname "$0")"
+for dir in $(find . -name go.mod -mindepth 2 -maxdepth 2 | cut -d/ -f2); do
+    pushd "$dir" >/dev/null
+    echo "building example $dir ..." 1>&2
+    go build -o /dev/null .
+    popd >/dev/null
+done

examples/custom-instrumentation/go.mod

@@ -4,12 +4,19 @@ go 1.18
 
 require (
 	github.com/DataDog/datadog-go v4.8.3+incompatible
-	github.com/mccutchen/go-httpbin/v2 v2.3.0
+	github.com/mccutchen/go-httpbin/v2 v2.5.1
 )
 
 require (
-	github.com/Microsoft/go-winio v0.5.2 // indirect
+	github.com/Microsoft/go-winio v0.6.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/stretchr/objx v0.3.0 // indirect
 	github.com/stretchr/testify v1.3.0 // indirect
-	golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c // indirect
+	golang.org/x/mod v0.7.0 // indirect
+	golang.org/x/sys v0.2.0 // indirect
+	golang.org/x/tools v0.3.0 // indirect
 )
+
+// Always build against the local version, to make it easier to update examples
+// in sync with changes to go-httpbin
+replace github.com/mccutchen/go-httpbin/v2 => ../..

examples/custom-instrumentation/go.sum

 github.com/DataDog/datadog-go v4.8.3+incompatible h1:fNGaYSuObuQb5nzeTQqowRAd9bpDIRRV4/gUtIBjh8Q=
 github.com/DataDog/datadog-go v4.8.3+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
-github.com/Microsoft/go-winio v0.5.2 h1:a9IhgEQBCUEk6QCdml9CiJGhAws+YwffDHEMp1VMrpA=
-github.com/Microsoft/go-winio v0.5.2/go.mod h1:WpS1mjBmmwHBEWmogvA2mj8546UReBk4v8QkMxJ6pZY=
+github.com/Microsoft/go-winio v0.6.0 h1:slsWYD/zyx7lCXoZVlvQrj0hPTM1HI4+v1sIda2yDvg=
+github.com/Microsoft/go-winio v0.6.0/go.mod h1:cTAf44im0RAYeL23bpB+fzCyDH2MJiz2BO69KH/soAE=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/mccutchen/go-httpbin/v2 v2.3.0 h1:NqVqPVI8Ushb/YJIe9bXiruBl0CDBSvp7BQSPXrY5qs=
-github.com/mccutchen/go-httpbin/v2 v2.3.0/go.mod h1:+DBHcmg6EOeoizuiOI8iL12VIHXx+9YQNlz+gjB9uxk=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.3.0 h1:NGXK3lHquSN08v5vWalVI/L8XU9hdzE/G6xsrze47As=
 github.com/stretchr/objx v0.3.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE=
-github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
-golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c h1:VwygUrnw9jn88c4u8GD3rZQbqrP/tgas88tPUbBxQrk=
-golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/mod v0.7.0 h1:LapD9S96VoQRhi/GrNTqeBJFrUjs5UHCAtTlgwA5oZA=
+golang.org/x/mod v0.7.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
+golang.org/x/sys v0.2.0 h1:ljd4t30dBnAvMZaQCevtY0xLLD0A+bRZXbgLMLU1F/A=
+golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/tools v0.3.0 h1:SrNbZl6ECOS1qFzgTdQfWXZM9XBkiA6tkFrH9YSTPHM=
+golang.org/x/tools v0.3.0/go.mod h1:/rWhSS2+zyEVwoJf8YAX6L2f0ntZ7Kn/mGgAWcipA5k=