go.opentelemetry.io/otel/metric v1.37.0: WithInstrumentationAttributes

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify go.opentelemetry.io/otel/metric.WithInstrumentationAttributes in pkg:golang/go.opentelemetry.io/otel/metric@v1.37.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/go.opentelemetry.io/otel/metric@v1.37.0
Demonstrate these symbols/APIs:
  - go.opentelemetry.io/otel/metric.WithInstrumentationAttributes

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:33e5baf96978bf254960cb8eeaa89fd31d8a030c2dddc0b9652076faef1cf6dd","contract":["WithInstrumentationAttributes returns a MeterOption that configures InstrumentationAttributes on MeterConfig","MeterConfig.InstrumentationAttributes returns the attribute.Set containing the configured key-value attributes","WithInstrumentationAttributes deduplicates duplicate keys and preserves distinct keys","MeterProvider accepts WithInstrumentationAttributes when obtaining a Meter","Later WithInstrumentationAttributes option replaces previously configured instrumentation attributes","WithInstrumentationAttributes with no arguments yields an empty attribute Set"],"goal":"verify go.opentelemetry.io/otel/metric.WithInstrumentationAttributes in pkg:golang/go.opentelemetry.io/otel/metric@v1.37.0","kind":"HOW","packages":["pkg:golang/go.opentelemetry.io/otel/metric@v1.37.0"],"schemaVersion":1,"symbols":["go.opentelemetry.io/otel/metric.WithInstrumentationAttributes"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/go.opentelemetry.io/otel/metric@v1.37.0"],"schemaVersion":1,"subject":"pkg:golang/go.opentelemetry.io/otel/metric@v1.37.0","symbols":["go.opentelemetry.io/otel/metric.WithInstrumentationAttributes"],"verifierAdapter":"golang@1"}

module sample

go 1.23.0

require (
	go.opentelemetry.io/otel v1.37.0
	go.opentelemetry.io/otel/metric v1.37.0
)

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/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
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/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
go.opentelemetry.io/auto/sdk v1.1.0/go.mod h1:3wSPjt5PWp2RhlCcmmOial7AvC4DQqZb7a7wCow3W8A=
go.opentelemetry.io/otel v1.37.0 h1:9zhNfelUvx0KBfu/gb+ZgeAfAgtWrfHJZcAqFC228wQ=
go.opentelemetry.io/otel v1.37.0/go.mod h1:ehE/umFRLnuLa/vSccNq9oS1ErUlkkK71gMcN34UG8I=
go.opentelemetry.io/otel/metric v1.37.0 h1:mvwbQS5m0tbmqML4NqK+e3aDiO02vsf/WgbsdpcPoZE=
go.opentelemetry.io/otel/metric v1.37.0/go.mod h1:04wGrZurHYKOc+RKeye86GwKiTb9FKm1WHtO+4EVr2E=
go.opentelemetry.io/otel/trace v1.37.0 h1:HLdcFNbRQBE2imdSEgm/kwqmQj1Or1l/7bW6mxVK7z4=
go.opentelemetry.io/otel/trace v1.37.0/go.mod h1:TlgrlQ+PtQO5XFerSPUYG0JSgGyryXewPGyayAWSBS0=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

package main

import (
	"fmt"
	"os"

	"go.opentelemetry.io/otel/attribute"
	"go.opentelemetry.io/otel/metric"
	"go.opentelemetry.io/otel/metric/noop"
)

// ConfigureMeter creates a Meter and MeterConfig configured with instrumentation attributes.
func ConfigureMeter(name string, attrs ...attribute.KeyValue) (metric.Meter, metric.MeterConfig) {
	opt := metric.WithInstrumentationAttributes(attrs...)
	cfg := metric.NewMeterConfig(opt)

	mp := noop.NewMeterProvider()
	meter := mp.Meter(name, opt)
	return meter, cfg
}

func main() {
	attr1 := attribute.String("library.language", "go")
	attr2 := attribute.String("component", "http-client")

	_, cfg := ConfigureMeter("example-service", attr1, attr2)
	set := cfg.InstrumentationAttributes()

	val, ok := set.Value("component")
	if !ok || val.AsString() != "http-client" {
		fmt.Fprintf(os.Stderr, "InstrumentationAttributes verification failed: expected component=http-client\n")
		os.Exit(1)
	}

	fmt.Printf("Configured meter with %d instrumentation attributes successfully.\n", set.Len())
}

{
  "schemaVersion": 1,
  "goal": "verify go.opentelemetry.io/otel/metric.WithInstrumentationAttributes in pkg:golang/go.opentelemetry.io/otel/metric@v1.37.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/go.opentelemetry.io/otel/metric@v1.37.0"
  ],
  "symbols": [
    "go.opentelemetry.io/otel/metric.WithInstrumentationAttributes"
  ]
}

package main

import (
	"fmt"
	"os"

	"go.opentelemetry.io/otel/attribute"
	"go.opentelemetry.io/otel/metric"
	"go.opentelemetry.io/otel/metric/noop"
)

func main() {
	// Assertion 1: WithInstrumentationAttributes returns a MeterOption that configures InstrumentationAttributes on MeterConfig
	attr1 := attribute.String("service.component", "worker")
	attr2 := attribute.Int("schema.version", 1)
	opt := metric.WithInstrumentationAttributes(attr1, attr2)
	if opt == nil {
		fmt.Fprintf(os.Stderr, "CONTRACT FAIL: WithInstrumentationAttributes returned nil option\n")
		os.Exit(1)
	}

	cfg := metric.NewMeterConfig(opt)
	set := cfg.InstrumentationAttributes()
	if set.Len() != 2 {
		fmt.Fprintf(os.Stderr, "CONTRACT FAIL: expected 2 attributes in set, got %d\n", set.Len())
		os.Exit(1)
	}

	// Assertion 2: MeterConfig.InstrumentationAttributes returns the attribute.Set containing the configured key-value attributes
	val, ok := set.Value("service.component")
	if !ok || val.AsString() != "worker" {
		fmt.Fprintf(os.Stderr, "CONTRACT FAIL: expected service.component=worker, got %v (ok=%v)\n", val, ok)
		os.Exit(1)
	}
	valInt, ok := set.Value("schema.version")
	if !ok || valInt.AsInt64() != 1 {
		fmt.Fprintf(os.Stderr, "CONTRACT FAIL: expected schema.version=1, got %v (ok=%v)\n", valInt, ok)
		os.Exit(1)
	}

	// Assertion 3: WithInstrumentationAttributes deduplicates duplicate keys and preserves distinct keys
	dedupOpt := metric.WithInstrumentationAttributes(
		attribute.String("env", "staging"),
		attribute.String("region", "us-east"),
		attribute.String("env", "production"),
	)
	cfgDedup := metric.NewMeterConfig(dedupOpt)
	setDedup := cfgDedup.InstrumentationAttributes()
	if setDedup.Len() != 2 {
		fmt.Fprintf(os.Stderr, "CONTRACT FAIL: expected 2 attributes after deduplication, got %d\n", setDedup.Len())
		os.Exit(1)
	}
	envVal, ok := setDedup.Value("env")
	if !ok || envVal.AsString() != "production" {
		fmt.Fprintf(os.Stderr, "CONTRACT FAIL: expected last duplicate key to win (env=production), got %v\n", envVal)
		os.Exit(1)
	}

	// Assertion 4: MeterProvider accepts WithInstrumentationAttributes when obtaining a Meter
	mp := noop.NewMeterProvider()
	meter := mp.Meter("example.com/contract-test", opt)
	if meter == nil {
		fmt.Fprintf(os.Stderr, "CONTRACT FAIL: MeterProvider.Meter returned nil\n")
		os.Exit(1)
	}

	// Assertion 5: Later WithInstrumentationAttributes option replaces previously configured instrumentation attributes
	optA := metric.WithInstrumentationAttributes(attribute.String("stage", "initial"))
	optB := metric.WithInstrumentationAttributes(attribute.String("stage", "final"), attribute.Bool("ready", true))
	cfgMulti := metric.NewMeterConfig(optA, optB)
	setMulti := cfgMulti.InstrumentationAttributes()
	if setMulti.Len() != 2 {
		fmt.Fprintf(os.Stderr, "CONTRACT FAIL: expected 2 attributes after replacement, got %d\n", setMulti.Len())
		os.Exit(1)
	}
	stageVal, ok := setMulti.Value("stage")
	if !ok || stageVal.AsString() != "final" {
		fmt.Fprintf(os.Stderr, "CONTRACT FAIL: expected stage=final after replacement, got %v\n", stageVal)
		os.Exit(1)
	}

	// Assertion 6: WithInstrumentationAttributes with no arguments yields an empty attribute Set
	emptyOpt := metric.WithInstrumentationAttributes()
	cfgEmpty := metric.NewMeterConfig(emptyOpt)
	setEmpty := cfgEmpty.InstrumentationAttributes()
	if setEmpty.Len() != 0 {
		fmt.Fprintf(os.Stderr, "CONTRACT FAIL: expected empty attribute set, got %d\n", setEmpty.Len())
		os.Exit(1)
	}

	fmt.Println("Contract tests passed successfully.")
}