pulling_gauge: fix build with --no-default-features

tikv / rust-prometheus

Prometheus instrumentation library for Rust applications

Apache License 2.0

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Closed tyranron closed 1 year ago

tyranron commented 1 year ago

After merging #405 the master fails to build with --no-default-features. The regression wasn't caught by CI as it doesn't check this scenario.

Fix the compilation issue by using crate::from_vec!() in PullingGauge implementation (as the other metric types do).
Add commands to check --no-default-features scenario on CI.