cabin: renamed from poac

See https://github.com/orgs/cabinpkg/discussions/1052

Formula/c/cabin.rb

@@ -0,0 +1,49 @@
+class Cabin < Formula
+  desc "Package manager and build system for C++"
+  homepage "https://github.com/cabinpkg/cabin"
+  url "https://github.com/cabinpkg/cabin/archive/refs/tags/0.11.0.tar.gz"
+  sha256 "0ffefbfa8aa26a55c9acb058943a35a4d316ad13f588fee0c66ee5e16673e657"
+  license "Apache-2.0"
+  head "https://github.com/cabinpkg/cabin.git", branch: "main"
+
+  depends_on "nlohmann-json" => :build
+  depends_on "toml11" => :build
+  depends_on "curl"
+  depends_on "fmt"
+  depends_on "libgit2"
+  depends_on "pkgconf"
+  depends_on "tbb"
+
+  on_macos do
+    depends_on "llvm" => [:build, :test] if DevelopmentTools.clang_build_version <= 1200
+  end
+
+  on_linux do
+    depends_on "gcc" # C++20
+  end
+
+  fails_with :clang do
+    build 1200
+    cause "Requires C++20"
+  end
+
+  fails_with :gcc do
+    version "11"
+    cause "Requires C++20"
+  end
+
+  def install
+    ENV.llvm_clang if OS.mac? && (DevelopmentTools.clang_build_version <= 1200)
+    # Avoid cloning `toml11` at build-time.
+    (buildpath/"build-out/DEPS/toml11").install_symlink Formula["toml11"].opt_include
+    system "make", "RELEASE=1", "PREFIX=#{prefix}", "install"
+  end
+
+  test do
+    ENV.clang if OS.mac? && (DevelopmentTools.clang_build_version <= 1200)
+    system bin/"cabin", "new", "hello_world"
+    cd "hello_world" do
+      assert_equal "Hello, world!", shell_output("#{bin}/cabin run").split("\n").last
+    end
+  end
+end

audit_exceptions/linux_only_gcc_dependency_allowlist.json

@@ -1,5 +1,5 @@
 [
+  "cabin",
   "gsmartcontrol",
-  "nghttp2",
-  "poac"
+  "nghttp2"
 ]

formula_renames.json

@@ -120,6 +120,7 @@
   "[email protected]": "[email protected]",
   "parallelstl": "onedpl",
   "pev": "readpe",
+  "poac": "cabin",
   "polarssl": "mbedtls",
   "postgresql": "postgresql@14",
   "prest": "prestd",