chore: pin instrumentation itself (#102)

* pin instrumentation itself

* chore: fix test

tool/preprocess/dependency.go

@@ -660,7 +660,13 @@ func (dp *DepProcessor) setupDeps() error {
 		return fmt.Errorf("failed to update otel: %w", err)
 	}
 
-	// Befor generating compile commands, let's run go mod tidy first
+	// Try to pin opentelemetry-go-auto-instrumentation itself
+	tpe := dp.tryPinInstVersion()
+	if tpe != nil {
+		log.Printf("failed to pin opentelemetry-go-auto-instrumentation itself")
+	}
+
+	// Before generating compile commands, let's run go mod tidy first
 	// to fetch all dependencies
 	err = runModTidy()
 	if err != nil {

tool/preprocess/preprocess.go

@@ -16,6 +16,7 @@ package preprocess
 
 import (
 	"fmt"
+	"github.com/alibaba/opentelemetry-go-auto-instrumentation/tool/version"
 	"log"
 	"os"
 	"os/exec"
@@ -42,6 +43,10 @@ const (
 
 const FixedOtelDepVersion = "v1.30.0"
 
+const instDependency = "github.com/alibaba/opentelemetry-go-auto-instrumentation"
+
+const OTEL_INST_VERSION = "OTEL_INST_VERSION"
+
 var fixedOtelDeps = []string{
 	"go.opentelemetry.io/otel",
 	"go.opentelemetry.io/otel/sdk",
@@ -146,7 +151,7 @@ func (dp *DepProcessor) pinDepVersion() error {
 
 // We want to fetch otel dependencies in a fixed version instead of the latest
 // version, so we need to pin the version in go.mod. All used otel dependencies
-// should be listed and pinned here, because go mod tidy  will fetch the latest
+// should be listed and pinned here, because go mod tidy will fetch the latest
 // version even if we have pinned some of them.
 func (dp *DepProcessor) pinOtelVersion() error {
 	for _, dep := range fixedOtelDeps {
@@ -159,6 +164,21 @@ func (dp *DepProcessor) pinOtelVersion() error {
 	return nil
 }
 
+// Users will import github.com/alibaba/opentelemetry-go-auto-instrumentation
+// dependency while using otelbuild to use the inst-api and inst-semconv package.
+// We need to pin the version to let the users use the fixed version
+func (dp *DepProcessor) tryPinInstVersion() error {
+	instVersion := os.Getenv(OTEL_INST_VERSION)
+	if instVersion == "" {
+		instVersion = version.Tag
+	}
+	err := runGoGet(instDependency + "@" + instVersion)
+	if err != nil {
+		return fmt.Errorf("failed to pin %s %w", instDependency, err)
+	}
+	return nil
+}
+
 func checkModularized() error {
 	go11module := os.Getenv("GO111MODULE")
 	if go11module == "off" {
@@ -221,7 +241,7 @@ func Preprocess() error {
 			return fmt.Errorf("failed to update dependencies: %w", err)
 		}
 
-		// Pinning otel version in go.mod
+		// Pinning otel sdk dependencies version in go.mod
 		err = dp.pinOtelVersion()
 		if err != nil {
 			return fmt.Errorf("failed to update otel: %w", err)
@@ -233,6 +253,11 @@ func Preprocess() error {
 			return fmt.Errorf("failed to run mod tidy: %w", err)
 		}
 
+		tpe := dp.tryPinInstVersion()
+		if tpe != nil {
+			log.Printf("failed to pin opentelemetry-go-auto-instrumentation itself")
+		}
+
 		log.Printf("Preprocess took %v", time.Since(start))
 	}
 

tool/version/version.go

@@ -0,0 +1,18 @@
+// Copyright (c) 2024 Alibaba Group Holding Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package version
+
+// Tag specifies the current release tag. It needs to be manually updated.
+const Tag = "v0.2.0"