feat(options): read sample rates from env vars#1540
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Support SENTRY_SAMPLE_RATE and SENTRY_TRACES_SAMPLE_RATE environment variables during sentry_options_new(), using locale-independent parsing with validation. Values are clamped to [0.0, 1.0] by existing setters. https://develop.sentry.dev/sdk/expected-features/environment-variables#supported-environment-variables Closes: #1519 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Reject NaN values parsed from SENTRY_SAMPLE_RATE and SENTRY_TRACES_SAMPLE_RATE, as NaN bypasses the clamping logic in the setter functions. Also restore env vars after tests and add a NaN-specific test case. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Extract parse_double_env helper to deduplicate sample rate env parsing and tolerate trailing whitespace. Replace SETENV/UNSETENV macros with pushenv/popenv functions that clone the old value before overwriting, preventing use of dangling getenv pointers. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Replace isnan with !isfinite to also reject inf/-inf values, which would otherwise get clamped and silently enable full sampling. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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SENTRY_SAMPLE_RATEandSENTRY_TRACES_SAMPLE_RATEenvironment variables duringsentry_options_new(), using locale-independent parsing with validation. Values are clamped to [0.0, 1.0] by the existing setter functions.See also:
https://develop.sentry.dev/sdk/expected-features/environment-variables#supported-environment-variables
Closes: #1519