{"id":16852915,"url":"https://github.com/lann/builder","last_synced_at":"2025-05-15T23:03:00.606Z","repository":{"id":13171151,"uuid":"15854220","full_name":"lann/builder","owner":"lann","description":"Fluent immutable builders for golang","archived":false,"fork":false,"pushed_at":"2018-08-02T20:07:27.000Z","size":18,"stargazers_count":223,"open_issues_count":2,"forks_count":17,"subscribers_count":2,"default_branch":"master","last_synced_at":"2025-05-15T23:01:57.458Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":"","language":"Go","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/lann.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2014-01-13T00:45:06.000Z","updated_at":"2025-01-25T02:30:19.000Z","dependencies_parsed_at":"2022-09-17T05:01:29.687Z","dependency_job_id":null,"html_url":"https://github.com/lann/builder","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lann%2Fbuilder","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lann%2Fbuilder/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lann%2Fbuilder/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lann%2Fbuilder/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/lann","download_url":"https://codeload.github.com/lann/builder/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":254436943,"owners_count":22070946,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-10-13T13:49:05.711Z","updated_at":"2025-05-15T23:03:00.541Z","avatar_url":"https://github.com/lann.png","language":"Go","readme":"# Builder - fluent immutable builders for Go\n\n[![GoDoc](https://godoc.org/github.com/lann/builder?status.png)](https://godoc.org/github.com/lann/builder)\n[![Build Status](https://travis-ci.org/lann/builder.png?branch=master)](https://travis-ci.org/lann/builder)\n\nBuilder was originally written for\n[Squirrel](https://github.com/lann/squirrel), a fluent SQL generator. It\nis probably the best example of Builder in action.\n\nBuilder helps you write **fluent** DSLs for your libraries with method chaining:\n\n```go\nresp := ReqBuilder.\n    Url(\"http://golang.org\").\n    Header(\"User-Agent\", \"Builder\").\n    Get()\n```\n\nBuilder uses **immutable** persistent data structures\n([these](https://github.com/mndrix/ps), specifically)\nso that each step in your method chain can be reused:\n\n```go\nbuild := WordBuilder.AddLetters(\"Build\")\nbuilder := build.AddLetters(\"er\")\nbuilding := build.AddLetters(\"ing\")\n```\n\nBuilder makes it easy to **build** structs using the **builder** pattern\n(*surprise!*):\n\n```go\nimport \"github.com/lann/builder\"\n\ntype Muppet struct {\n    Name string\n    Friends []string\n}\n\ntype muppetBuilder builder.Builder\n\nfunc (b muppetBuilder) Name(name string) muppetBuilder {\n    return builder.Set(b, \"Name\", name).(muppetBuilder)\n}\n\nfunc (b muppetBuilder) AddFriend(friend string) muppetBuilder {\n    return builder.Append(b, \"Friends\", friend).(muppetBuilder)\n}\n\nfunc (b muppetBuilder) Build() Muppet {\n    return builder.GetStruct(b).(Muppet)\n}\n\nvar MuppetBuilder = builder.Register(muppetBuilder{}, Muppet{}).(muppetBuilder)\n```\n```go\nMuppetBuilder.\n    Name(\"Beaker\").\n    AddFriend(\"Dr. Honeydew\").\n    Build()\n\n=\u003e Muppet{Name:\"Beaker\", Friends:[]string{\"Dr. Honeydew\"}}\n```\n\n## License\n\nBuilder is released under the\n[MIT License](http://www.opensource.org/licenses/MIT).\n","funding_links":[],"categories":["Go"],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flann%2Fbuilder","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Flann%2Fbuilder","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flann%2Fbuilder/lists"}