Support link_overwrite and conflicts_with in API

Library/Homebrew/formula.rb

@@ -2119,6 +2119,8 @@ def to_hash
       "uses_from_macos"          => uses_from_macos_elements.uniq,
       "requirements"             => [],
       "conflicts_with"           => conflicts.map(&:name),
+      "conflicts_with_reasons"   => conflicts.map(&:reason),
+      "link_overwrite"           => self.class.link_overwrite_paths.to_a,
       "caveats"                  => caveats&.gsub(HOMEBREW_PREFIX, HOMEBREW_PREFIX_PLACEHOLDER),
       "installed"                => [],
       "linked_keg"               => linked_version&.to_s,

Library/Homebrew/formulary.rb

@@ -244,6 +244,14 @@ def self.load_formula_from_api(name, flags:)
         depends_on req_name => req_tags
       end
 
+      json_formula["conflicts_with"].each_with_index do |conflict, index|
+        conflicts_with conflict, because: json_formula.dig("conflicts_with_reasons", index)
+      end
+
+      json_formula["link_overwrite"]&.each do |overwrite_path|
+        link_overwrite overwrite_path
+      end
+
       def install
         raise "Cannot build from source from abstract formula."
       end

Library/Homebrew/test/formulary_spec.rb

@@ -253,6 +253,9 @@ def formula_json_contents(extra_items = {})
                 "contexts" => ["build"],
               },
             ],
+            "conflicts_with"           => ["conflicting_formula"],
+            "conflicts_with_reasons"   => ["it does"],
+            "link_overwrite"           => ["bin/abc"],
             "caveats"                  => "example caveat string",
           }.merge(extra_items),
         }
@@ -330,6 +333,10 @@ def formula_json_contents(extra_items = {})
         expect(req.version).to eq "1.0"
         expect(req.tags).to eq [:build]
 
+        expect(formula.conflicts.map(&:name)).to include "conflicting_formula"
+        expect(formula.conflicts.map(&:reason)).to include "it does"
+        expect(formula.class.link_overwrite_paths).to include "bin/abc"
+
         expect(formula.caveats).to eq "example caveat string"
 
         expect {