Add GitHub Actions CI and migrate to edition 2021 Rust

.github/workflows/ci.yml

@@ -0,0 +1,47 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: ['**']
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt, clippy
+
+      - name: Check formatting
+        run: cargo fmt --all -- --check
+
+      - name: Build
+        run: cargo build --lib --bins --verbose
+
+      - name: Test
+        run: cargo test --verbose
+
+      - name: Clippy
+        run: cargo clippy --lib --bins --tests --verbose
+
+  # Guards the rust-version in Cargo.toml so the declared MSRV can't silently
+  # drift above the floor. The toolchain action pins 1.85 as this job's
+  # default, so a bare cargo invocation builds against it.
+  msrv:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: "1.85"
+
+      - name: Build with MSRV
+        run: cargo build --lib --bins --verbose
+
+      - name: Test with MSRV
+        run: cargo test --verbose

Cargo.toml

@@ -2,21 +2,19 @@
 name = "hornet"
 version = "0.1.0"
 authors = ["Saurav Sachidanand <sauravsachidanand@gmail.com>"]
+edition = "2021"
+rust-version = "1.84"
 license = "MIT OR Apache-2.0"
 description = "A Rust implementation of the PCP instrumentation API"
 repository = "https://github.com/performancecopilot/hornet"
 readme="README.md"
 keywords = ["performance", "instrumentation", "metric", "pcp", "mmv"]
 
 [dependencies]
-bitflags = "0.9.1"
-hdrsample = "4.0.0"
-lazy_static = "0.2.8"
+bitflags = "2"
+hdrhistogram = "=7.5.4"
 memmap2 = "0.9"
 
 [dev-dependencies]
-rand = "0.3.15"
-hyper = "0.11.2"
-futures = "0.1.14"
-curl = "0.4.8"
-iron = "0.5.1"
+rand = "0.8"
+tempfile = "3.16"

README.md

@@ -1,4 +1,4 @@
-# hornet [![crates.io badge](https://img.shields.io/crates/v/hornet.svg)](https://crates.io/crates/hornet) [![docs.rs badge](https://docs.rs/hornet/badge.svg)](https://docs.rs/hornet/0.1.0/hornet/) [![Travis CI Build Status](https://travis-ci.org/performancecopilot/hornet.svg?branch=master)](https://travis-ci.org/performancecopilot/hornet) [![AppVeyor Build Status](https://ci.appveyor.com/api/projects/status/ccvbo3chne8046vn/branch/master?svg=true)](https://ci.appveyor.com/project/saurvs/hornet-2qtki/branch/master) [![codecov](https://codecov.io/gh/performancecopilot/hornet/branch/master/graph/badge.svg)](https://codecov.io/gh/performancecopilot/hornet)
+# hornet [![crates.io badge](https://img.shields.io/crates/v/hornet.svg)](https://crates.io/crates/hornet) [![docs.rs badge](https://docs.rs/hornet/badge.svg)](https://docs.rs/hornet/0.1.0/hornet/) [![CI](https://github.com/performancecopilot/hornet/actions/workflows/ci.yml/badge.svg)](https://github.com/performancecopilot/hornet/actions/workflows/ci.yml)
 
 `hornet` is a Performance Co-Pilot (PCP) Memory Mapped Values (MMV) instrumentation library written in Rust.
 

examples/acme.rs

@@ -1,9 +1,6 @@
-extern crate hornet;
-extern crate rand;
-
 use hornet::client::metric::*;
 use hornet::client::Client;
-use rand::random;
+use rand::Rng;
 use std::thread;
 use std::time::Duration;
 
@@ -60,9 +57,9 @@ fn main() {
     /* update metrics */
 
     loop {
-        let rnd_idx = random::<usize>() % products.len();
+        let rnd_idx = rand::thread_rng().gen_range(0..products.len());
         let product = products[rnd_idx];
-        let working_time = random::<u64>() % 3;
+        let working_time = rand::thread_rng().gen_range(0..3);
         thread::sleep(Duration::from_secs(working_time));
 
         let count = *counts.val(product).unwrap();

examples/growth.rs

@@ -1,6 +1,3 @@
-extern crate hornet;
-extern crate rand;
-
 use hornet::client::metric::*;
 use hornet::client::Client;
 use std::thread;

examples/histogram.rs

@@ -1,14 +1,10 @@
-extern crate hornet;
-extern crate rand;
-
 use hornet::client::metric::*;
 use hornet::client::Client;
-use rand::distributions::{IndependentSample, Range};
-use rand::thread_rng;
+use rand::Rng;
 
 /*
     For detailed usage and behaviour of the underlying HDR histogram object,
-    check out jonhoo's hdrsample crate at https://github.com/jonhoo/hdrsample
+    check out the hdrhistogram crate at https://github.com/HdrHistogram/HdrHistogram_rust
 */
 
 fn main() {
@@ -42,15 +38,13 @@ fn main() {
 
     /* record 100 random values */
 
-    let range = Range::new(low, high);
-    let mut thread_rng = thread_rng();
+    let mut rng = rand::thread_rng();
 
     for _ in 0..100 {
-        hist.record(range.ind_sample(&mut thread_rng)).unwrap();
+        hist.record(rng.gen_range(low..high)).unwrap();
     }
 
     /* record a single random value 100 times */
 
-    hist.record_n(range.ind_sample(&mut thread_rng), 100)
-        .unwrap();
+    hist.record_n(rng.gen_range(low..high), 100).unwrap();
 }