feat: support .config/adventofcode.session

Cargo.toml

@@ -17,13 +17,13 @@ path = "src/main.rs"
 [dependencies]
 chrono = "0.4"
 clap = { version = "4", features = ["color", "derive"]}
-home = "0.5"
 html2text = "0.4"
 regex = "1.7"
 reqwest = { version = "0.11", features = ["blocking"] }
 term_size = "0.3"
 html2md = "0.2"
+dirs = "4.0.0"
 
 # Use static linking of OpenSSL on Linux with MUSL
 [target.x86_64-unknown-linux-musl.dependencies]
-openssl = { version = "0.10", features = ["vendored"] }
+openssl = { version = "0.10", features = ["vendored"] }

README.md

@@ -88,8 +88,8 @@ input and submit your answer, you need an adventofcode.com session cookie. To
 obtain your session cookie, login to the
 [Advent of Code](https://adventofcode.com) website and inspect the `session`
 value of the cookie that gets stored in your browser. Put the session number (a
-long hex string) in a file called `.adventofcode.session` in your home
-directory. This file should only contain your session number, in a single line.
+long hex string) either in a file called `.adventofcode.session` in your home
+directory or `adventofcode.session` in your users config directory (`~/.config` on Linux, `~/Library/Application Support` on macOS or `~\AppData\Roaming` on Windows). This file should only contain your session number, in a single line.
 
 ## Usage
 

src/main.rs

@@ -4,12 +4,12 @@ mod args;
 use aoc::*;
 use args::*;
 use clap::Parser;
-use home::home_dir;
 use std::fs::read_to_string;
 use std::path::PathBuf;
 use std::process::exit;
 
-const SESSION_COOKIE_FILE: &str = ".adventofcode.session";
+const SESSION_COOKIE_FILE: &str = "adventofcode.session";
+const HIDDEN_SESSION_COOKIE_FILE: &str = ".adventofcode.session";
 const DEFAULT_COL_WIDTH: usize = 80;
 
 fn main() -> Result<(), String> {
@@ -34,10 +34,15 @@ fn main() -> Result<(), String> {
 fn read_session_cookie(session_file: &Option<String>) -> String {
     let path = if let Some(file) = session_file {
         PathBuf::from(file)
-    } else if let Some(dir) = home_dir() {
+    } else if let Some(file) = dirs::home_dir()
+        .map(|dir| dir.join(HIDDEN_SESSION_COOKIE_FILE))
+        .filter(|file| file.exists())
+    {
+        file
+    } else if let Some(dir) = dirs::config_dir() {
         dir.join(SESSION_COOKIE_FILE)
     } else {
-        eprintln!("error: Failed to find home directory.");
+        eprintln!("error: Failed to find config directory.");
         exit(2);
     };