utils/github/api: simplify pagination

Library/Homebrew/utils/github.rb

@@ -306,11 +306,11 @@ module GitHub
   end
 
   def public_member_usernames(org, per_page: 100)
-    url = "#{API_URL}/orgs/#{org}/public_members?per_page=#{per_page}"
+    url = "#{API_URL}/orgs/#{org}/public_members"
     members = []
 
-    (1..API_MAX_PAGES).each do |page|
-      result = API.open_rest("#{url}&page=#{page}").map { |member| member["login"] }
+    API.paginate_rest(url, per_page: per_page) do |result|
+      result = result.map { |member| member["login"] }
       members.concat(result)
 
       return members if result.length < per_page
@@ -562,8 +562,7 @@ module GitHub
       raise API::Error, "Getting #{commit_count} commits would exceed limit of #{API_MAX_ITEMS} API items!"
     end
 
-    (1..API_MAX_PAGES).each do |page|
-      result = API.open_rest(commits_api + "?per_page=#{per_page}&page=#{page}")
+    API.paginate_rest(commits_api, per_page: per_page) do |result, page|
       commits.concat(result.map { |c| c["sha"] })
 
       return commits if commits.length == commit_count

Library/Homebrew/utils/github/api.rb

@@ -249,6 +249,13 @@ module GitHub
       end
     end
 
+    def paginate_rest(url, per_page: 100)
+      (1..API_MAX_PAGES).each do |page|
+        result = API.open_rest("#{url}?per_page=#{per_page}&page=#{page}")
+        yield(result, page)
+      end
+    end
+
     def open_graphql(query, scopes: [].freeze)
       data = { query: query }
       result = open_rest("https://api.github.com/graphql", scopes: scopes, data: data, request_method: "POST")