feat: add --year flag for download script

Author: fspoettel

README.md

@@ -30,8 +30,8 @@ Generated with the [advent-of-code-rust](https://github.com/fspoettel/advent-of-
 ### Setup new day
 
 ```sh
-# example: `./scripts/scaffold.sh 1`
-./scripts/scaffold.sh <day>
+# example: `./bin/scaffold 1`
+./bin/scaffold <day>
 
 # output:
 # Created module "src/bin/01.rs"
@@ -46,8 +46,8 @@ Every [solution](https://git.io/JyXa8) has _unit tests_ referencing the _example
 ### Download inputs for a day
 
 ```sh
-# example: `./scripts/download.sh 1`
-./scripts/download.sh <day>
+# example: `./bin/download 1`
+./bin/download <day>
 
 # output:
 # Loaded session cookie from "/home/felix/.adventofcode.session".
@@ -58,9 +58,9 @@ Every [solution](https://git.io/JyXa8) has _unit tests_ referencing the _example
 # 🎄 Successfully wrote input to "src/inputs/01.txt"!
 ```
 
-Puzzle inputs are not checked into git. [See here](https://old.reddit.com/r/adventofcode/comments/k99rod/sharing_input_data_were_we_requested_not_to/gf2ukkf/?context=3) why.
+To download inputs for previous years, append the `--year` flag. _(example: `./bin/download 1 --year 2020`)_
 
-> This script does not support downloading inputs for previous years. If you want to use this template for a previous aoc, [use the underlying `aoc-cli` binary directly](https://github.com/scarvalhojr/aoc-cli/#download-puzzle-input) or download your inputs manually.
+Puzzle inputs are not checked into git. [See here](https://old.reddit.com/r/adventofcode/comments/k99rod/sharing_input_data_were_we_requested_not_to/gf2ukkf/?context=3) why.
 
 ### Run solutions for a day
 

bin/download

@@ -0,0 +1,56 @@
+#!/bin/bash
+
+set -e;
+
+if ! command -v 'aoc' &> /dev/null
+then
+    echo "command \`aoc\` not found. Try running \`cargo install aoc-cli\` to install it."
+    exit 1
+fi
+
+POSITIONAL=()
+while [[ $# -gt 0 ]]; do
+  key="$1"
+
+  case $key in
+    -y|--year)
+      year="$2"
+      shift
+      shift
+      ;;
+    *)
+      POSITIONAL+=("$1")
+      shift
+      ;;
+  esac
+done
+
+set -- "${POSITIONAL[@]}"
+
+if [ -z "$1" ]; then
+    >&2 echo "Argument is required for day."
+    exit 1
+fi
+
+day=$(echo "$1" | sed 's/^0*//');
+day_padded=$(printf %02d "$day");
+
+filename="$day_padded";
+input_path="src/inputs/$filename.txt";
+
+tmp_dir=$(mktemp -d);
+tmp_file_path="$tmp_dir/input";
+
+if [[ "$year" != "" ]]
+then
+aoc download --day "$day" --year "$year" --file "$tmp_file_path";
+else
+aoc download --day "$day" --file "$tmp_file_path";
+fi
+
+cat "$tmp_file_path" > "$input_path";
+echo "---"
+echo "🎄 Successfully wrote input to \"$input_path\"!"
+
+trap "exit 1"            HUP INT PIPE QUIT TERM
+trap 'rm -rf "$tmp_dir"' EXIT

scripts/scaffold.sh renamed to bin/scaffold

@@ -2,23 +2,23 @@
 
 set -e;
 
-if [ ! -n "$1" ]; then
+if [ -z "$1" ]; then
     >&2 echo "Argument is required for day."
     exit 1
 fi
 
-day=$(echo $1 | sed 's/^0*//');
-day_padded=`printf %02d $day`;
+day=$(echo "$1" | sed 's/^0*//');
+day_padded=$(printf %02d "$day");
 
 filename="$day_padded";
 
 input_path="src/inputs/$filename.txt";
 example_path="src/examples/$filename.txt";
 module_path="src/bin/$filename.rs";
 
-touch $module_path;
+touch "$module_path";
 
-cat > $module_path <<EOF
+cat > "$module_path" <<EOF
 pub fn part_one(input: &str) -> u32 {
     0
 }
@@ -51,14 +51,14 @@ mod tests {
 }
 EOF
 
-perl -pi -e "s,DAYNUM,$day,g" $module_path;
+perl -pi -e "s,DAYNUM,$day,g" "$module_path";
 
 echo "Created module \"$module_path\"";
 
-touch $input_path;
+touch "$input_path";
 echo "Created empty input file \"$input_path\"";
 
-touch $example_path;
+touch "$example_path";
 echo "Created empty example file \"$example_path\"";
 echo "---"
 echo "🎄 Type \`cargo run --bin $day_padded\` to run your solution."