Write logger

logger/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "logger"
+version = "0.1.0"

logger/Cargo.toml

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+[package]
+name = "logger"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

logger/src/main.rs

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+pub trait Logger {
+    /// Log a message at the given verbosity level.
+    fn log(&self, verbosity: u8, message: &str);
+}
+
+struct StdoutLogger;
+
+impl Logger for StdoutLogger {
+    fn log(&self, verbosity: u8, message: &str) {
+        println!("verbosity={verbosity}: {message}");
+    }
+}
+
+struct VerbosityFilter {
+    max_verbosity: u8,
+    inner: StdoutLogger,
+}
+
+impl Logger for VerbosityFilter {
+    fn log(&self, verbosity: u8, message: &str) {
+        if verbosity <= self.max_verbosity {
+            self.inner.log(verbosity, message)
+        }
+    }
+}
+
+fn main() {
+    let logger = VerbosityFilter {
+        max_verbosity: 3,
+        inner: StdoutLogger,
+    };
+    logger.log(5, "FYI");
+    logger.log(2, "Uhoh");
+}

logger/target/.rustc_info.json

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+{"rustc_fingerprint":6732347950899328623,"outputs":{"4614504638168534921":{"success":true,"status":"","code":0,"stdout":"rustc 1.78.0 (9b00956e5 2024-04-29) (Alpine Linux 1.78.0-r0)\nbinary: rustc\ncommit-hash: 9b00956e56009bab2aa15d7bff10916599e3d6d6\ncommit-date: 2024-04-29\nhost: x86_64-alpine-linux-musl\nrelease: 1.78.0\nLLVM version: 17.0.6\n","stderr":""},"15729799797837862367":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/usr\noff\npacked\nunpacked\n___\ndebug_assertions\npanic=\"unwind\"\nproc_macro\ntarget_abi=\"\"\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"musl\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_has_atomic=\"16\"\ntarget_has_atomic=\"32\"\ntarget_has_atomic=\"64\"\ntarget_has_atomic=\"8\"\ntarget_has_atomic=\"ptr\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"alpine\"\nunix\n","stderr":""}},"successes":{}}

logger/target/CACHEDIR.TAG

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+Signature: 8a477f597d28d172789f06886806bc55
+# This file is a cache directory tag created by cargo.
+# For information about cache directory tags see https://bford.info/cachedir/

logger/target/debug/.fingerprint/logger-24dda9cfa85dde2e/bin-logger

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+e93c6c14f8990fed

logger/target/debug/.fingerprint/logger-24dda9cfa85dde2e/bin-logger.json

@@ -0,0 +1 @@
+{"rustc":527819051023801553,"features":"[]","declared_features":"","target":16938823611516788830,"profile":11597332650809196192,"path":1684066648322511884,"deps":[],"local":[{"CheckDepInfo":{"dep_info":"debug/.fingerprint/logger-24dda9cfa85dde2e/dep-bin-logger"}}],"rustflags":[],"metadata":7797948686568424061,"config":2202906307356721367,"compile_kind":0}

logger/target/debug/.fingerprint/logger-24dda9cfa85dde2e/invoked.timestamp

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+This file has an mtime of when this was started.

logger/target/debug/.fingerprint/logger-25d7fa76bb1e13bd/invoked.timestamp

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+This file has an mtime of when this was started.

logger/target/debug/.fingerprint/logger-25d7fa76bb1e13bd/test-bin-logger

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+c1fb9f4ae6f812af

logger/target/debug/.fingerprint/logger-25d7fa76bb1e13bd/test-bin-logger.json

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+{"rustc":527819051023801553,"features":"[]","declared_features":"","target":16938823611516788830,"profile":11983525691607113661,"path":1684066648322511884,"deps":[],"local":[{"CheckDepInfo":{"dep_info":"debug/.fingerprint/logger-25d7fa76bb1e13bd/dep-test-bin-logger"}}],"rustflags":[],"metadata":7797948686568424061,"config":2202906307356721367,"compile_kind":0}

logger/target/debug/.fingerprint/logger-93bf7dd47194b21e/bin-logger

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+f8f84ecbc97cbdac

logger/target/debug/.fingerprint/logger-93bf7dd47194b21e/bin-logger.json

@@ -0,0 +1 @@
+{"rustc":527819051023801553,"features":"[]","declared_features":"","target":16938823611516788830,"profile":5601947868832436996,"path":1684066648322511884,"deps":[],"local":[{"CheckDepInfo":{"dep_info":"debug/.fingerprint/logger-93bf7dd47194b21e/dep-bin-logger"}}],"rustflags":[],"metadata":7797948686568424061,"config":2202906307356721367,"compile_kind":0}

logger/target/debug/.fingerprint/logger-93bf7dd47194b21e/invoked.timestamp

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+This file has an mtime of when this was started.

logger/target/debug/deps/logger-24dda9cfa85dde2e.d

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+/home/caskd/Sources/Repositories/Personal/Rust/logger/target/debug/deps/logger-24dda9cfa85dde2e: src/main.rs
+
+/home/caskd/Sources/Repositories/Personal/Rust/logger/target/debug/deps/logger-24dda9cfa85dde2e.d: src/main.rs
+
+src/main.rs:

logger/target/debug/deps/logger-25d7fa76bb1e13bd.d

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+/home/caskd/Sources/Repositories/Personal/Rust/logger/target/debug/deps/liblogger-25d7fa76bb1e13bd.rmeta: src/main.rs
+
+/home/caskd/Sources/Repositories/Personal/Rust/logger/target/debug/deps/logger-25d7fa76bb1e13bd.d: src/main.rs
+
+src/main.rs:

logger/target/debug/deps/logger-93bf7dd47194b21e.d

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+/home/caskd/Sources/Repositories/Personal/Rust/logger/target/debug/deps/liblogger-93bf7dd47194b21e.rmeta: src/main.rs
+
+/home/caskd/Sources/Repositories/Personal/Rust/logger/target/debug/deps/logger-93bf7dd47194b21e.d: src/main.rs
+
+src/main.rs:

logger/target/debug/logger.d

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+/home/caskd/Sources/Repositories/Personal/Rust/logger/target/debug/logger: /home/caskd/Sources/Repositories/Personal/Rust/logger/src/main.rs