37 lines
986 B
Go
37 lines
986 B
Go
package childprocess
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import (
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"context"
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"go.opentelemetry.io/otel/propagation"
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)
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// Environ returns list of environment variables that need to be sent to the child process
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// in order for it to pick up cross-process tracing from same state.
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func Environ(ctx context.Context) []string {
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var tm textMap
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tc := propagation.TraceContext{}
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tc.Inject(ctx, &tm)
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var env []string
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// deprecated: removed in v0.11.0
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// previously defined in https://github.com/open-telemetry/opentelemetry-swift/blob/4ea467ed4b881d7329bf2254ca7ed7f2d9d6e1eb/Sources/OpenTelemetrySdk/Trace/Propagation/EnvironmentContextPropagator.swift#L14-L15
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if tm.parent != "" {
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env = append(env, "OTEL_TRACE_PARENT="+tm.parent)
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}
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if tm.state != "" {
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env = append(env, "OTEL_TRACE_STATE="+tm.state)
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}
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// open-telemetry/opentelemetry-specification#740
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if tm.parent != "" {
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env = append(env, "TRACEPARENT="+tm.parent)
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}
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if tm.state != "" {
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env = append(env, "TRACESTATE="+tm.state)
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}
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return env
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}
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