just 0.3.1 (new formula)

Closes #19320.

Signed-off-by: Alex Dunn <dunn.alex@gmail.com>

Formula/just.rb

@@ -0,0 +1,22 @@
+class Just < Formula
+  desc "Handy way to save and run project-specific commands"
+  homepage "https://github.com/casey/just"
+  url "https://github.com/casey/just/archive/v0.3.1.tar.gz"
+  sha256 "acb8e967906357476fc9328636292a1a2b369f84903a114573607ec0215bf0e7"
+
+  depends_on "rust" => :build
+
+  def install
+    system "cargo", "build", "--release"
+    bin.install "target/release/just"
+  end
+
+  test do
+    (testpath/"justfile").write <<-EOS.undent
+      default:
+        touch it-worked
+    EOS
+    system "#{bin}/just"
+    assert_predicate testpath/"it-worked", :exist?
+  end
+end