Add assignment 4

scripts/grade-04.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+set -e
+set -uo pipefail
+IFS=$'\n\t'
+
+# Imports library.
+BASEDIR=$(dirname "$0")
+source $BASEDIR/grade-utils.sh
+
+RUNNERS=(
+    "cargo"
+    "cargo --release"
+    "cargo_asan"
+    "cargo_asan --release"
+    "cargo_tsan"
+    "cargo_tsan --release"
+)
+
+# Lints.
+cargo fmt --check
+cargo clippy
+
+# Executes test for each runner.
+for RUNNER in "${RUNNERS[@]}"; do
+    echo "Running with $RUNNER..."
+
+    TESTS=("--lib assignment04_grade")
+    if [ $(run_tests) -ne 0 ]; then
+        exit 1
+    fi
+done
+
+exit 0

scripts/prepare-submissions.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+set -e
+
+BASEDIR=$(dirname "$0")/..
+
+mkdir -p $BASEDIR/target
+
+zip -rj $BASEDIR/target/assignment04.zip src/assignments/assignment04