diagnostic: check kernel, glibc versions [Linux]

Library/Homebrew/extend/os/linux/diagnostic.rb

@@ -1,6 +1,8 @@
 require "tempfile"
 require "utils/shell"
 require "os/linux/diagnostic"
+require "os/linux/glibc"
+require "os/linux/kernel"
 
 module Homebrew
   module Diagnostic
@@ -59,6 +61,33 @@ module Homebrew
             echo 'umask 002' >> #{shell_profile}
         EOS
       end
+
+      def check_glibc_minimum_version
+        return unless OS::Linux::Glibc.below_minimum_version?
+
+        <<~EOS
+          Your system glibc #{OS::Linux::Glibc.system_version} is too old.
+          We only support glibc #{OS::Linux::Glibc.minimum_version} or later.
+          #{please_create_pull_requests}
+          We recommend updating to a newer version via your distribution's
+          package manager, upgrading your distribution to the latest version,
+          or changing distributions.
+        EOS
+      end
+
+      def check_kernel_minimum_version
+        return unless OS::Linux::Kernel.below_minimum_version?
+
+        <<~EOS
+          Your Linux kernel #{OS::Linux::Kernel.version} is too old.
+          We only support kernel #{OS::Linux::Kernel.minimum_version} or later.
+          You will be unable to use binary packages (bottles).
+          #{please_create_pull_requests}
+          We recommend updating to a newer version via your distribution's
+          package manager, upgrading your distribution to the latest version,
+          or changing distributions.
+        EOS
+      end
     end
   end
 end

Library/Homebrew/test/os/linux/diagnostic_spec.rb

@@ -0,0 +1,17 @@
+require "diagnostic"
+
+describe Homebrew::Diagnostic::Checks do
+  specify "#check_glibc_minimum_version" do
+    allow(OS::Linux::Glibc).to receive(:below_minimum_version?).and_return(true)
+
+    expect(subject.check_glibc_minimum_version)
+      .to match(/Your system glibc .+ is too old/)
+  end
+
+  specify "#check_kernel_minimum_version" do
+    allow(OS::Linux::Kernel).to receive(:below_minimum_version?).and_return(true)
+
+    expect(subject.check_kernel_minimum_version)
+      .to match(/Your Linux kernel .+ is too old/)
+  end
+end