Add gorelease Make target (#4169)

* Add gorelease Make target

* Update RELEASING.md

* Update RELEASING.md

* Fix merge

---------

Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
Co-authored-by: Tyler Yahn <codingalias@gmail.com>

Makefile

@@ -71,7 +71,10 @@ $(CROSSLINK): PACKAGE=go.opentelemetry.io/build-tools/crosslink
 GOTMPL = $(TOOLS)/gotmpl
 $(GOTMPL): PACKAGE=go.opentelemetry.io/build-tools/gotmpl
 
-tools: $(GOLANGCI_LINT) $(MISSPELL) $(GOCOVMERGE) $(STRINGER) $(PORTO) $(MULTIMOD) $(DBOTCONF) $(CROSSLINK) $(GOTMPL)
+GORELEASE = $(TOOLS)/gorelease
+$(GORELEASE): PACKAGE=golang.org/x/exp/cmd/gorelease
+
+tools: $(GOLANGCI_LINT) $(MISSPELL) $(GOCOVMERGE) $(STRINGER) $(PORTO) $(MULTIMOD) $(DBOTCONF) $(CROSSLINK) $(GOTMPL) $(GORELEASE)
 
 # Generate
 
@@ -289,13 +292,21 @@ test-gomemcache:
 
 # Releasing
 
+.PHONY: gorelease
+gorelease: $(OTEL_GO_MOD_DIRS:%=gorelease/%)
+gorelease/%: DIR=$*
+gorelease/%:| $(GORELEASE)
+	@echo "gorelease in $(DIR):" \
+		&& cd $(DIR) \
+		&& $(GORELEASE) \
+		|| echo ""
+
 COREPATH ?= "../opentelemetry-go"
 .PHONY: sync-core
 sync-core: | $(MULTIMOD)
 	@[ ! -d $COREPATH ] || ( echo ">> Path to core repository must be set in COREPATH and must exist"; exit 1 )
 	$(MULTIMOD) verify && $(MULTIMOD) sync -a -o ${COREPATH}
 
-
 .PHONY: prerelease
 prerelease: | $(MULTIMOD)
 	@[ "${MODSET}" ] || ( echo ">> env var MODSET is not set"; exit 1 )

RELEASING.md

@@ -12,6 +12,13 @@ versions will be. If you are making a release to upgrade the upstream
 go.opentelemetry.io/otel packages, all module sets will likely need to be
 released.
 
+### Breaking changes validation
+
+You can run `make gorelease` that runs [gorelease](https://pkg.go.dev/golang.org/x/exp/cmd/gorelease)
+to ensure that there are no unwanted changes done in the public API.
+
+You can check/report problems with `gorelease` [here](https://golang.org/issues/26420).
+
 ### Create a release branch
 
 Update the versions of the module sets you have identified in `versions.yaml`.

tools/go.mod

@@ -13,6 +13,7 @@ require (
 	go.opentelemetry.io/build-tools/dbotconf v0.11.0
 	go.opentelemetry.io/build-tools/gotmpl v0.11.0
 	go.opentelemetry.io/build-tools/multimod v0.11.0
+	golang.org/x/exp v0.0.0-20230510235704-dd950f8aeaea
 	golang.org/x/tools v0.12.0
 )
 
@@ -193,7 +194,6 @@ require (
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/zap v1.24.0 // indirect
 	golang.org/x/crypto v0.12.0 // indirect
-	golang.org/x/exp v0.0.0-20230510235704-dd950f8aeaea // indirect
 	golang.org/x/exp/typeparams v0.0.0-20230307190834-24139beb5833 // indirect
 	golang.org/x/mod v0.12.0 // indirect
 	golang.org/x/net v0.14.0 // indirect

tools/tools.go

@@ -26,5 +26,6 @@ import (
 	_ "go.opentelemetry.io/build-tools/dbotconf"
 	_ "go.opentelemetry.io/build-tools/gotmpl"
 	_ "go.opentelemetry.io/build-tools/multimod"
+	_ "golang.org/x/exp/cmd/gorelease"
 	_ "golang.org/x/tools/cmd/stringer"
 )