Initial QSfera import

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/LICENSE

@@ -0,0 +1,231 @@
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Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/README.md

@@ -0,0 +1,3 @@
+# STDOUT Trace Exporter
+
+[![PkgGoDev](https://pkg.go.dev/badge/go.opentelemetry.io/otel/exporters/stdout/stdouttrace)](https://pkg.go.dev/go.opentelemetry.io/otel/exporters/stdout/stdouttrace)

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/config.go

@@ -0,0 +1,85 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package stdouttrace // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
+
+import (
+	"io"
+	"os"
+)
+
+var (
+	defaultWriter      = os.Stdout
+	defaultPrettyPrint = false
+	defaultTimestamps  = true
+)
+
+// config contains options for the STDOUT exporter.
+type config struct {
+	// Writer is the destination.  If not set, os.Stdout is used.
+	Writer io.Writer
+
+	// PrettyPrint will encode the output into readable JSON. Default is
+	// false.
+	PrettyPrint bool
+
+	// Timestamps specifies if timestamps should be printed. Default is
+	// true.
+	Timestamps bool
+}
+
+// newConfig creates a validated Config configured with options.
+func newConfig(options ...Option) config {
+	cfg := config{
+		Writer:      defaultWriter,
+		PrettyPrint: defaultPrettyPrint,
+		Timestamps:  defaultTimestamps,
+	}
+	for _, opt := range options {
+		cfg = opt.apply(cfg)
+	}
+	return cfg
+}
+
+// Option sets the value of an option for a Config.
+type Option interface {
+	apply(config) config
+}
+
+// WithWriter sets the export stream destination.
+func WithWriter(w io.Writer) Option {
+	return writerOption{w}
+}
+
+type writerOption struct {
+	W io.Writer
+}
+
+func (o writerOption) apply(cfg config) config {
+	cfg.Writer = o.W
+	return cfg
+}
+
+// WithPrettyPrint prettifies the emitted output.
+func WithPrettyPrint() Option {
+	return prettyPrintOption(true)
+}
+
+type prettyPrintOption bool
+
+func (o prettyPrintOption) apply(cfg config) config {
+	cfg.PrettyPrint = bool(o)
+	return cfg
+}
+
+// WithoutTimestamps sets the export stream to not include timestamps.
+func WithoutTimestamps() Option {
+	return timestampsOption(false)
+}
+
+type timestampsOption bool
+
+func (o timestampsOption) apply(cfg config) config {
+	cfg.Timestamps = bool(o)
+	return cfg
+}

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/doc.go

@@ -0,0 +1,9 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package stdouttrace contains an OpenTelemetry exporter for tracing
+// telemetry to be written to an output destination as JSON.
+//
+// See [go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/x] for information about
+// the experimental features.
+package stdouttrace // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace"

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/counter/counter.go

@@ -0,0 +1,31 @@
+// Code generated by gotmpl. DO NOT MODIFY.
+// source: internal/shared/counter/counter.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package counter provides a simple counter for generating unique IDs.
+//
+// This package is used to generate unique IDs while allowing testing packages
+// to reset the counter.
+package counter // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/counter"
+
+import "sync/atomic"
+
+// exporterN is a global 0-based count of the number of exporters created.
+var exporterN atomic.Int64
+
+// NextExporterID returns the next unique ID for an exporter.
+func NextExporterID() int64 {
+	const inc = 1
+	return exporterN.Add(inc) - inc
+}
+
+// SetExporterID sets the exporter ID counter to v and returns the previous
+// value.
+//
+// This function is useful for testing purposes, allowing you to reset the
+// counter. It should not be used in production code.
+func SetExporterID(v int64) int64 {
+	return exporterN.Swap(v)
+}

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/gen.go

@@ -0,0 +1,12 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package internal provides internal functionality for the stdouttrace
+// package.
+package internal // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal"
+
+//go:generate gotmpl --body=../../../../internal/shared/counter/counter.go.tmpl "--data={ \"pkg\": \"go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/counter\" }" --out=counter/counter.go
+//go:generate gotmpl --body=../../../../internal/shared/counter/counter_test.go.tmpl "--data={}" --out=counter/counter_test.go
+
+//go:generate gotmpl --body=../../../../internal/shared/x/x.go.tmpl "--data={ \"pkg\": \"go.opentelemetry.io/otel/exporters/stdout/stdouttrace\" }" --out=x/x.go
+//go:generate gotmpl --body=../../../../internal/shared/x/x_test.go.tmpl "--data={}" --out=x/x_test.go

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/observ/instrumentation.go

@@ -0,0 +1,230 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package observ provides experimental observability instrumentation
+// for the stdout trace exporter.
+package observ // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/observ"
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"sync"
+	"time"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal"
+	"go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/x"
+	"go.opentelemetry.io/otel/metric"
+	semconv "go.opentelemetry.io/otel/semconv/v1.40.0"
+	"go.opentelemetry.io/otel/semconv/v1.40.0/otelconv"
+)
+
+const (
+	// ComponentType uniquely identifies the OpenTelemetry Exporter component
+	// being instrumented.
+	//
+	// The STDOUT trace exporter is not a standardized OTel component type, so
+	// it uses the Go package prefixed type name to ensure uniqueness and
+	// identity.
+	ComponentType = "go.opentelemetry.io/otel/exporters/stdout/stdouttrace.Exporter"
+
+	// ScopeName is the unique name of the meter used for instrumentation.
+	ScopeName = "go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/observ"
+
+	// SchemaURL is the schema URL of the metrics produced by this
+	// instrumentation.
+	SchemaURL = semconv.SchemaURL
+
+	// Version is the current version of this instrumentation.
+	//
+	// This matches the version of the exporter.
+	Version = internal.Version
+)
+
+var (
+	measureAttrsPool = &sync.Pool{
+		New: func() any {
+			// "component.name" + "component.type" + "error.type"
+			const n = 1 + 1 + 1
+			s := make([]attribute.KeyValue, 0, n)
+			// Return a pointer to a slice instead of a slice itself
+			// to avoid allocations on every call.
+			return &s
+		},
+	}
+
+	addOptPool = &sync.Pool{
+		New: func() any {
+			const n = 1 // WithAttributeSet
+			o := make([]metric.AddOption, 0, n)
+			return &o
+		},
+	}
+
+	recordOptPool = &sync.Pool{
+		New: func() any {
+			const n = 1 // WithAttributeSet
+			o := make([]metric.RecordOption, 0, n)
+			return &o
+		},
+	}
+)
+
+func get[T any](p *sync.Pool) *[]T { return p.Get().(*[]T) }
+
+func put[T any](p *sync.Pool, s *[]T) {
+	*s = (*s)[:0] // Reset.
+	p.Put(s)
+}
+
+func ComponentName(id int64) string {
+	return fmt.Sprintf("%s/%d", ComponentType, id)
+}
+
+// Instrumentation is experimental instrumentation for the exporter.
+type Instrumentation struct {
+	inflightSpans metric.Int64UpDownCounter
+	exportedSpans metric.Int64Counter
+	opDuration    metric.Float64Histogram
+
+	attrs  []attribute.KeyValue
+	setOpt metric.MeasurementOption
+}
+
+// NewInstrumentation returns instrumentation for a STDOUT trace exporter with
+// the provided ID using the global MeterProvider.
+//
+// If the experimental observability is disabled, nil is returned.
+func NewInstrumentation(id int64) (*Instrumentation, error) {
+	if !x.Observability.Enabled() {
+		return nil, nil
+	}
+
+	i := &Instrumentation{
+		attrs: []attribute.KeyValue{
+			semconv.OTelComponentName(ComponentName(id)),
+			semconv.OTelComponentTypeKey.String(ComponentType),
+		},
+	}
+
+	s := attribute.NewSet(i.attrs...)
+	i.setOpt = metric.WithAttributeSet(s)
+
+	mp := otel.GetMeterProvider()
+	m := mp.Meter(
+		ScopeName,
+		metric.WithInstrumentationVersion(Version),
+		metric.WithSchemaURL(SchemaURL),
+	)
+
+	var err error
+
+	inflightSpans, e := otelconv.NewSDKExporterSpanInflight(m)
+	if e != nil {
+		e = fmt.Errorf("failed to create span inflight metric: %w", e)
+		err = errors.Join(err, e)
+	}
+	i.inflightSpans = inflightSpans.Inst()
+
+	exportedSpans, e := otelconv.NewSDKExporterSpanExported(m)
+	if e != nil {
+		e = fmt.Errorf("failed to create span exported metric: %w", e)
+		err = errors.Join(err, e)
+	}
+	i.exportedSpans = exportedSpans.Inst()
+
+	opDuration, e := otelconv.NewSDKExporterOperationDuration(m)
+	if e != nil {
+		e = fmt.Errorf("failed to create operation duration metric: %w", e)
+		err = errors.Join(err, e)
+	}
+	i.opDuration = opDuration.Inst()
+
+	return i, err
+}
+
+// ExportSpans instruments the ExportSpans method of the exporter. It returns a
+// function that needs to be deferred so it is called when the method returns.
+func (i *Instrumentation) ExportSpans(ctx context.Context, nSpans int) ExportOp {
+	start := time.Now()
+
+	if i.inflightSpans.Enabled(ctx) {
+		addOpt := get[metric.AddOption](addOptPool)
+		defer put(addOptPool, addOpt)
+		*addOpt = append(*addOpt, i.setOpt)
+		i.inflightSpans.Add(ctx, int64(nSpans), *addOpt...)
+	}
+
+	return ExportOp{
+		ctx:    ctx,
+		start:  start,
+		nSpans: int64(nSpans),
+		inst:   i,
+	}
+}
+
+// ExportOp is an in-progress ExportSpans operation.
+type ExportOp struct {
+	ctx    context.Context
+	start  time.Time
+	nSpans int64
+	inst   *Instrumentation
+}
+
+// End ends the ExportSpans operation, recording its success and duration.
+//
+// The success parameter indicates how many spans were successfully exported.
+// The err parameter indicates whether the operation failed. If err is not nil,
+// the number of failed spans (nSpans - success) is also recorded.
+func (e ExportOp) End(success int64, err error) {
+	inflightSpansEnable := e.inst.inflightSpans.Enabled(e.ctx)
+	exportedSpansEnable := e.inst.exportedSpans.Enabled(e.ctx)
+	opDurationEnable := e.inst.opDuration.Enabled(e.ctx)
+
+	if !inflightSpansEnable && !exportedSpansEnable && !opDurationEnable {
+		return
+	}
+
+	addOpt := get[metric.AddOption](addOptPool)
+	defer put(addOptPool, addOpt)
+	*addOpt = append(*addOpt, e.inst.setOpt)
+
+	if inflightSpansEnable {
+		e.inst.inflightSpans.Add(e.ctx, -e.nSpans, *addOpt...)
+	}
+
+	// Record the success and duration of the operation.
+	//
+	// Do not exclude 0 values, as they are valid and indicate no spans
+	// were exported which is meaningful for certain aggregations.
+	if exportedSpansEnable {
+		e.inst.exportedSpans.Add(e.ctx, success, *addOpt...)
+	}
+
+	mOpt := e.inst.setOpt
+	if err != nil && exportedSpansEnable {
+		attrs := get[attribute.KeyValue](measureAttrsPool)
+		defer put(measureAttrsPool, attrs)
+		*attrs = append(*attrs, e.inst.attrs...)
+		*attrs = append(*attrs, semconv.ErrorType(err))
+
+		// Do not inefficiently make a copy of attrs by using
+		// WithAttributes instead of WithAttributeSet.
+		set := attribute.NewSet(*attrs...)
+		mOpt = metric.WithAttributeSet(set)
+
+		// Reset addOpt with new attribute set.
+		*addOpt = append((*addOpt)[:0], mOpt)
+
+		e.inst.exportedSpans.Add(e.ctx, e.nSpans-success, *addOpt...)
+	}
+
+	if opDurationEnable {
+		recordOpt := get[metric.RecordOption](recordOptPool)
+		defer put(recordOptPool, recordOpt)
+		*recordOpt = append(*recordOpt, mOpt)
+		e.inst.opDuration.Record(e.ctx, time.Since(e.start).Seconds(), *recordOpt...)
+	}
+}

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/version.go

@@ -0,0 +1,8 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package internal // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal"
+
+// Version is the current release version of the OpenTelemetry stdouttrace
+// exporter in use.
+const Version = "1.43.0"

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/x/README.md

@@ -0,0 +1,36 @@
+# Experimental Features
+
+The `stdouttrace` exporter contains features that have not yet stabilized in the OpenTelemetry specification.
+These features are added to the `stdouttrace` exporter prior to stabilization in the specification so that users can start experimenting with them and provide feedback.
+
+These features may change in backwards incompatible ways as feedback is applied.
+See the [Compatibility and Stability](#compatibility-and-stability) section for more information.
+
+## Features
+
+- [Observability](#observability)
+
+### Observability
+
+The `stdouttrace` exporter can be configured to provide observability about itself using OpenTelemetry metrics.
+
+To opt-in, set the environment variable `OTEL_GO_X_OBSERVABILITY` to `true`.
+
+When enabled, the SDK will create the following metrics using the global `MeterProvider`:
+
+- `otel.sdk.exporter.span.inflight`
+- `otel.sdk.exporter.span.exported`
+- `otel.sdk.exporter.operation.duration`
+
+Please see the [Semantic conventions for OpenTelemetry SDK metrics] documentation for more details on these metrics.
+
+[Semantic conventions for OpenTelemetry SDK metrics]: https://github.com/open-telemetry/semantic-conventions/blob/v1.36.0/docs/otel/sdk-metrics.md
+
+## Compatibility and Stability
+
+Experimental features do not fall within the scope of the OpenTelemetry Go versioning and stability [policy](../../../../../VERSIONING.md).
+These features may be removed or modified in successive version releases, including patch versions.
+
+When an experimental feature is promoted to a stable feature, a migration path will be included in the changelog entry of the release.
+There is no guarantee that any environment variable feature flags that enabled the experimental feature will be supported by the stable version.
+If they are supported, they may be accompanied with a deprecation notice stating a timeline for the removal of that support.

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/x/features.go

@@ -0,0 +1,23 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package x documents experimental features for [go.opentelemetry.io/otel/exporters/stdout/stdouttrace].
+package x // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/x"
+
+import "strings"
+
+// Observability is an experimental feature flag that determines if exporter
+// observability metrics are enabled.
+//
+// To enable this feature set the OTEL_GO_X_OBSERVABILITY environment variable
+// to the case-insensitive string value of "true" (i.e. "True" and "TRUE"
+// will also enable this).
+var Observability = newFeature(
+	[]string{"OBSERVABILITY", "SELF_OBSERVABILITY"},
+	func(v string) (string, bool) {
+		if strings.EqualFold(v, "true") {
+			return v, true
+		}
+		return "", false
+	},
+)

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/x/x.go

@@ -0,0 +1,58 @@
+// Code generated by gotmpl. DO NOT MODIFY.
+// source: internal/shared/x/x.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package x documents experimental features for [go.opentelemetry.io/otel/exporters/stdout/stdouttrace].
+package x // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/x"
+
+import (
+	"os"
+)
+
+// Feature is an experimental feature control flag. It provides a uniform way
+// to interact with these feature flags and parse their values.
+type Feature[T any] struct {
+	keys  []string
+	parse func(v string) (T, bool)
+}
+
+func newFeature[T any](suffix []string, parse func(string) (T, bool)) Feature[T] {
+	const envKeyRoot = "OTEL_GO_X_"
+	keys := make([]string, 0, len(suffix))
+	for _, s := range suffix {
+		keys = append(keys, envKeyRoot+s)
+	}
+	return Feature[T]{
+		keys:  keys,
+		parse: parse,
+	}
+}
+
+// Keys returns the environment variable keys that can be set to enable the
+// feature.
+func (f Feature[T]) Keys() []string { return f.keys }
+
+// Lookup returns the user configured value for the feature and true if the
+// user has enabled the feature. Otherwise, if the feature is not enabled, a
+// zero-value and false are returned.
+func (f Feature[T]) Lookup() (v T, ok bool) {
+	// https://github.com/open-telemetry/opentelemetry-specification/blob/62effed618589a0bec416a87e559c0a9d96289bb/specification/configuration/sdk-environment-variables.md#parsing-empty-value
+	//
+	// > The SDK MUST interpret an empty value of an environment variable the
+	// > same way as when the variable is unset.
+	for _, key := range f.keys {
+		vRaw := os.Getenv(key)
+		if vRaw != "" {
+			return f.parse(vRaw)
+		}
+	}
+	return v, ok
+}
+
+// Enabled reports whether the feature is enabled.
+func (f Feature[T]) Enabled() bool {
+	_, ok := f.Lookup()
+	return ok
+}

Server/vendor/go.opentelemetry.io/otel/exporters/stdout/stdouttrace/trace.go

@@ -0,0 +1,121 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package stdouttrace // import "go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"sync"
+	"time"
+
+	"go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/counter"
+	"go.opentelemetry.io/otel/exporters/stdout/stdouttrace/internal/observ"
+	"go.opentelemetry.io/otel/sdk/trace"
+	"go.opentelemetry.io/otel/sdk/trace/tracetest"
+)
+
+var zeroTime time.Time
+
+var _ trace.SpanExporter = &Exporter{}
+
+// New creates an Exporter with the passed options.
+func New(options ...Option) (*Exporter, error) {
+	cfg := newConfig(options...)
+
+	enc := json.NewEncoder(cfg.Writer)
+	if cfg.PrettyPrint {
+		enc.SetIndent("", "\t")
+	}
+
+	exporter := &Exporter{
+		encoder:    enc,
+		timestamps: cfg.Timestamps,
+	}
+
+	var err error
+	exporter.inst, err = observ.NewInstrumentation(counter.NextExporterID())
+	return exporter, err
+}
+
+// Exporter is an implementation of trace.SpanSyncer that writes spans to stdout.
+type Exporter struct {
+	encoder    *json.Encoder
+	encoderMu  sync.Mutex
+	timestamps bool
+
+	stoppedMu sync.RWMutex
+	stopped   bool
+
+	inst *observ.Instrumentation
+}
+
+// ExportSpans writes spans in json format to stdout.
+func (e *Exporter) ExportSpans(ctx context.Context, spans []trace.ReadOnlySpan) (err error) {
+	var success int64
+	if e.inst != nil {
+		op := e.inst.ExportSpans(ctx, len(spans))
+		defer func() { op.End(success, err) }()
+	}
+
+	if err := ctx.Err(); err != nil {
+		return err
+	}
+	e.stoppedMu.RLock()
+	stopped := e.stopped
+	e.stoppedMu.RUnlock()
+	if stopped {
+		return nil
+	}
+
+	if len(spans) == 0 {
+		return nil
+	}
+
+	stubs := tracetest.SpanStubsFromReadOnlySpans(spans)
+
+	e.encoderMu.Lock()
+	defer e.encoderMu.Unlock()
+	for i := range stubs {
+		stub := &stubs[i]
+		// Remove timestamps
+		if !e.timestamps {
+			stub.StartTime = zeroTime
+			stub.EndTime = zeroTime
+			for j := range stub.Events {
+				ev := &stub.Events[j]
+				ev.Time = zeroTime
+			}
+		}
+
+		// Encode span stubs, one by one
+		if e := e.encoder.Encode(stub); e != nil {
+			err = errors.Join(err, fmt.Errorf("failed to encode span %d: %w", i, e))
+			continue
+		}
+		success++
+	}
+	return err
+}
+
+// Shutdown is called to stop the exporter, it performs no action.
+func (e *Exporter) Shutdown(context.Context) error {
+	e.stoppedMu.Lock()
+	e.stopped = true
+	e.stoppedMu.Unlock()
+
+	return nil
+}
+
+// MarshalLog is the marshaling function used by the logging system to represent this Exporter.
+func (e *Exporter) MarshalLog() any {
+	return struct {
+		Type           string
+		WithTimestamps bool
+	}{
+		Type:           "stdout",
+		WithTimestamps: e.timestamps,
+	}
+}