[bugfix] Downstep otel to fix freebsd compile issue (#1773)

https://github.com/open-telemetry/opentelemetry-go/issues/4076

2 files changed, 15 insertions, 6 deletions

diff --git a/vendor/go.opentelemetry.io/otel/sdk/internal/env/env.go b/vendor/go.opentelemetry.io/otel/sdk/internal/env/env.go
index 59dcfab25..5e94b8ae5 100644
--- a/vendor/go.opentelemetry.io/otel/sdk/internal/env/env.go
+++ b/vendor/go.opentelemetry.io/otel/sdk/internal/env/env.go
@@ -70,8 +70,8 @@ const (
 // returned.
 func firstInt(defaultValue int, keys ...string) int {
 	for _, key := range keys {
-		value := os.Getenv(key)
-		if value == "" {
+		value, ok := os.LookupEnv(key)
+		if !ok {
 			continue
 		}
 
@@ -88,10 +88,10 @@ func firstInt(defaultValue int, keys ...string) int {
 }
 
 // IntEnvOr returns the int value of the environment variable with name key if
-// it exists, it is not empty, and the value is an int. Otherwise, defaultValue is returned.
+// it exists and the value is an int. Otherwise, defaultValue is returned.
 func IntEnvOr(key string, defaultValue int) int {
-	value := os.Getenv(key)
-	if value == "" {
+	value, ok := os.LookupEnv(key)
+	if !ok {
 		return defaultValue
 	}
 
diff --git a/vendor/go.opentelemetry.io/otel/sdk/internal/internal.go b/vendor/go.opentelemetry.io/otel/sdk/internal/internal.go
index dfeaaa8ca..84a02306e 100644
--- a/vendor/go.opentelemetry.io/otel/sdk/internal/internal.go
+++ b/vendor/go.opentelemetry.io/otel/sdk/internal/internal.go
@@ -14,7 +14,16 @@
 
 package internal // import "go.opentelemetry.io/otel/sdk/internal"
 
-import "time"
+import (
+	"fmt"
+	"time"
+
+	"go.opentelemetry.io/otel"
+)
+
+// UserAgent is the user agent to be added to the outgoing
+// requests from the exporters.
+var UserAgent = fmt.Sprintf("opentelemetry-go/%s", otel.Version())
 
 // MonotonicEndTime returns the end time at present
 // but offset from start, monotonically.