utils/inreplace: add `inreplace_pairs`

Library/Homebrew/dev-cmd/bump-formula-pr.rb

@@ -294,7 +294,10 @@ module Homebrew
         "",
       ]
     end
-    new_contents = inreplace_pairs(formula.path, replacement_pairs.uniq.compact, args: args)
+    new_contents = Utils::Inreplace.inreplace_pairs(formula.path,
+                                                    replacement_pairs.uniq.compact,
+                                                    read_only_run: read_only_run,
+                                                    silent:        args.quiet?)
 
     new_formula_version = formula_version(formula, requested_spec, new_contents)
 
@@ -462,34 +465,6 @@ module Homebrew
     [remote_url, username]
   end
 
-  def inreplace_pairs(path, replacement_pairs, args:)
-    read_only_run = args.dry_run? && !args.write?
-    if read_only_run
-      str = path.open("r") { |f| Formulary.ensure_utf8_encoding(f).read }
-      contents = StringInreplaceExtension.new(str)
-      replacement_pairs.each do |old, new|
-        ohai "replace #{old.inspect} with #{new.inspect}" unless args.quiet?
-        raise "No old value for new value #{new}! Did you pass the wrong arguments?" unless old
-
-        contents.gsub!(old, new)
-      end
-      raise Utils::InreplaceError, path => contents.errors unless contents.errors.empty?
-
-      path.atomic_write(contents.inreplace_string) if args.write?
-      contents.inreplace_string
-    else
-      Utils::Inreplace.inreplace(path) do |s|
-        replacement_pairs.each do |old, new|
-          ohai "replace #{old.inspect} with #{new.inspect}" unless args.quiet?
-          raise "No old value for new value #{new}! Did you pass the wrong arguments?" unless old
-
-          s.gsub!(old, new)
-        end
-      end
-      path.open("r") { |f| Formulary.ensure_utf8_encoding(f).read }
-    end
-  end
-
   def formula_version(formula, spec, contents = nil)
     name = formula.name
     path = formula.path

Library/Homebrew/test/inreplace_spec.rb

@@ -305,4 +305,12 @@ describe Utils::Inreplace do
       end
     }.to raise_error(Utils::InreplaceError)
   end
+
+  describe "#inreplace_pairs" do
+    it "raises error if there is no old value" do
+      expect {
+        described_class.inreplace_pairs(file.path, [[nil, "f"]])
+      }.to raise_error(Utils::InreplaceError)
+    end
+  end
 end

Library/Homebrew/utils/inreplace.rb

@@ -11,6 +11,8 @@ module Utils
   end
 
   module Inreplace
+    module_function
+
     # Sometimes we have to change a bit before we install. Mostly we
     # prefer a patch but if you need the `prefix` of this formula in the
     # patch you have to resort to `inreplace`, because in the patch
@@ -42,6 +44,23 @@ module Utils
 
       raise InreplaceError, errors unless errors.empty?
     end
-    module_function :inreplace
+
+    def inreplace_pairs(path, replacement_pairs, read_only_run: false, silent: false)
+      str = File.open(path, "rb", &:read)
+      contents = StringInreplaceExtension.new(str)
+      replacement_pairs.each do |old, new|
+        ohai "replace #{old.inspect} with #{new.inspect}" unless silent
+        unless old
+          contents.errors << "No old value for new value #{new}! Did you pass the wrong arguments?"
+          next
+        end
+
+        contents.gsub!(old, new)
+      end
+      raise InreplaceError, path => contents.errors unless contents.errors.empty?
+
+      Pathname(path).atomic_write(contents.inreplace_string) unless read_only_run
+      contents.inreplace_string
+    end
   end
 end