Parse command-line-arguments

Use command-line-arguments to set the config file path and the log
level.

Cargo.lock

@@ -44,6 +44,43 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "clap"
+version = "4.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d8d93d855ce6a0aa87b8473ef9169482f40abaa2e9e0993024c35c902cbd5920"
+dependencies = [
+ "bitflags",
+ "clap_derive",
+ "clap_lex",
+ "is-terminal",
+ "once_cell",
+ "strsim",
+ "termcolor",
+]
+
+[[package]]
+name = "clap_derive"
+version = "4.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "684a277d672e91966334af371f1a7b5833f9aa00b07c84e92fbce95e00208ce8"
+dependencies = [
+ "heck",
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "783fe232adfca04f90f56201b26d79682d4cd2625e0bc7290b95123afe558ade"
+dependencies = [
+ "os_str_bytes",
+]
+
 [[package]]
 name = "core-foundation"
 version = "0.9.3"
@@ -103,6 +140,27 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2153bd83ebc09db15bcbdc3e2194d901804952e3dc96967e1cd3b0c5c32d112"
 
+[[package]]
+name = "errno"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f639046355ee4f37944e44f60642c6f3a7efa3cf6b78c78a0d989a8ce6c396a1"
+dependencies = [
+ "errno-dragonfly",
+ "libc",
+ "winapi",
+]
+
+[[package]]
+name = "errno-dragonfly"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa68f1b12764fab894d2755d2518754e71b4fd80ecfb822714a1206c2aab39bf"
+dependencies = [
+ "cc",
+ "libc",
+]
+
 [[package]]
 name = "fastrand"
 version = "1.8.0"
@@ -166,6 +224,21 @@ version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
 
+[[package]]
+name = "heck"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2540771e65fc8cb83cd6e8a237f70c319bd5c29f78ed1084ba5d50eeac86f7f9"
+
+[[package]]
+name = "hermit-abi"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee512640fe35acbfb4bb779db6f0d80704c2cacfa2e39b601ef3e3f47d1ae4c7"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "hostname"
 version = "0.3.1"
@@ -213,6 +286,28 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "io-lifetimes"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7d6c6f8c91b4b9ed43484ad1a938e393caf35960fce7f82a040497207bd8e9e"
+dependencies = [
+ "libc",
+ "windows-sys",
+]
+
+[[package]]
+name = "is-terminal"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "28dfb6c8100ccc63462345b67d1bbc3679177c75ee4bf59bf29c8b1d110b8189"
+dependencies = [
+ "hermit-abi",
+ "io-lifetimes",
+ "rustix",
+ "windows-sys",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.5"
@@ -254,6 +349,12 @@ version = "0.2.139"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "201de327520df007757c1f0adce6e827fe8562fbc28bfd9c15571c66ca1f5f79"
 
+[[package]]
+name = "linux-raw-sys"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f051f77a7c8e6957c0696eac88f26b0117e54f52d3fc682ab19397a8812846a4"
+
 [[package]]
 name = "lock_api"
 version = "0.4.9"
@@ -401,6 +502,12 @@ dependencies = [
  "vcpkg",
 ]
 
+[[package]]
+name = "os_str_bytes"
+version = "6.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b7820b9daea5457c9f21c69448905d723fbd21136ccf521748f23fd49e723ee"
+
 [[package]]
 name = "overload"
 version = "0.1.1"
@@ -534,6 +641,20 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "rustix"
+version = "0.36.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d4fdebc4b395b7fbb9ab11e462e20ed9051e7b16e42d24042c776eca0ac81b03"
+dependencies = [
+ "bitflags",
+ "errno",
+ "io-lifetimes",
+ "libc",
+ "linux-raw-sys",
+ "windows-sys",
+]
+
 [[package]]
 name = "schannel"
 version = "0.1.21"
@@ -644,6 +765,12 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "strsim"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
+
 [[package]]
 name = "syn"
 version = "1.0.107"
@@ -669,6 +796,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "termcolor"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be55cf8942feac5c765c2c993422806843c9a9a45d4d5c407ad6dd2ea95eb9b6"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "thread_local"
 version = "1.1.4"
@@ -856,6 +992,7 @@ name = "whakarite"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "clap",
  "diesel",
  "lettre",
  "log",
@@ -882,6 +1019,15 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"

Cargo.toml

@@ -19,3 +19,4 @@ lettre = { version = "0.10", features = ["tracing"] }
 diesel = { version = "2", features = ["postgres", "r2d2", "time"] }
 serde = { version = "1", features = ["derive"] }
 toml = "0.6"
+clap = { version = "4", features = ["derive"] }

src/args.rs

@@ -0,0 +1,15 @@
+use clap::Parser;
+use std::path::PathBuf;
+use tracing::Level;
+
+#[derive(Parser)]
+#[command(author, version, about)]
+pub struct Args {
+    /// Use a custom config file
+    #[arg(short, long, value_name = "FILE")]
+    config: Option<PathBuf>,
+
+    /// Set a log level
+    #[arg(short, long, value_name = "LEVEL", default_value_t = Level::INFO)]
+    pub log_level: Level,
+}

src/main.rs

@@ -1,4 +1,5 @@
 use anyhow::Result;
+use clap::Parser;
 use diesel::{
     prelude::*,
     r2d2::{ConnectionManager, Pool, PooledConnection},
@@ -8,10 +9,12 @@ use std::{env, thread::park_timeout};
 use time::{Duration, OffsetDateTime};
 use tracing::{debug, info, trace};
 
+mod args;
 mod config;
 mod models;
 mod schema;
 
+use args::Args;
 use config::Config;
 use models::{NewReminder, Reminder};
 
@@ -54,6 +57,12 @@ fn remind(
 }
 
 fn main() -> Result<()> {
+    let args = Args::parse();
+
+    if env::var("RUST_LOG").is_err() {
+        env::set_var("RUST_LOG", format!("{}", args.log_level));
+    }
+
     tracing_subscriber::fmt::init();
 
     info!(