exa 0.4.1 (new formula)

Closes #11817.

Signed-off-by: FX Coudert <fxcoudert@gmail.com>

Formula/exa.rb

@@ -0,0 +1,25 @@
+class Exa < Formula
+  desc "Modern replacement for 'ls'"
+  homepage "https://the.exa.website"
+  url "https://github.com/ogham/exa/archive/v0.4.1.tar.gz"
+  sha256 "1005f320aabc776971ac2adb422eaae001d7adafac47f67c9000f94e70c3b56a"
+  head "https://github.com/ogham/exa.git"
+
+  depends_on "cmake" => :build
+  depends_on "rust" => :build
+  depends_on "libgit2" => :recommended
+
+  def install
+    args = ["--release"]
+    args << "--no-default-features" if build.without? "libgit2"
+
+    system "cargo", "build", *args
+    bin.install "target/release/exa"
+    man1.install "contrib/man/exa.1"
+  end
+
+  test do
+    (testpath/"test.txt").write("")
+    assert_match "test.txt", shell_output("#{bin}/exa")
+  end
+end