Initial scaffolding for doing advent of code challenges

Mostly just having a project and a convenient way of reading in a
file.

2 files changed, 41 insertions, 0 deletions

diff --git a/src/bin/day_1.rs b/src/bin/day_1.rs
new file mode 100644
index 0000000..7c9cdbf
--- /dev/null
+++ b/src/bin/day_1.rs
@@ -0,0 +1,18 @@
+extern crate advent_of_code_2018;
+use advent_of_code_2018::*;
+
+use std::error::Error;
+use std::path::PathBuf;
+
+// cargo watch -cs "cargo run --bin day_1"
+
+fn main() -> Result<(), Box<Error>> {
+    let input = read_file(&PathBuf::from("inputs/1.txt"))?;
+
+    println!("Input: {:?}", input);
+
+
+
+
+    Ok(())
+}
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..01d6242
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,23 @@
+use std::path::PathBuf;
+use std::io::BufReader;
+use std::io::prelude::*;
+use std::fs::File;
+
+/// Reads a specified file into a vector of strings, one line of the
+/// file per string. Fails if any part of reading the file fails.
+pub fn read_file(file: &PathBuf) -> Result<Vec<String>, std::io::Error> {
+    let file = File::open(file)?;
+    let file_reader = BufReader::new(file);
+    file_reader.lines()
+        .collect::<Result<Vec<_>, _>>()
+        .map(preprocess_file_lines)
+}
+
+/// Removes any empty lines and makes sure that lines don't have
+/// problematic whitespace.
+pub fn preprocess_file_lines(lines: Vec<String>) -> Vec<String> {
+    lines.iter()
+        .filter(|line| line.len() > 0)
+        .map(|line| line.trim_right().to_string())
+        .collect()
+}