git的代码量大多数都是根据命令行统计，或者根据第三方插件统计。但是都不满足我的需求，因为我们代码都由gitlab管理，于是想到了通过gitlab暴露出来的接口获取数据。
第一步，生成私钥
登录你的gitlab申请私钥private_token
第二步，获取当前用户可见的所有项目（即使用户不是成员）
接口地址：gitlab的地址/api/v4/projects/?private_token=xxx
返回参数：
[{ "id":219, "description":"", "name":"share-5.2.3.8", "name_with_namespace":"develop / share-5.2.3.8", "path":"share-5.2.3.8", "path_with_namespace":"develop/share-5.2.3.8", "created_at":"2019-07-10T19:59:29.855+08:00", "default_branch":"master", "tag_list":[ ], "ssh_url_to_repo":"git@127.0.0.1:develop/share-5.2.3.8.git", "http_url_to_repo":"http://127.0.0.1/develop/share-5.2.3.8.git", "web_url":"http://127.0.0.1/develop/share-5.2.3.8", "readme_url":"http://127.0.0.1/develop/share-5.2.3.8/blob/master/README.md", "avatar_url":null, "star_count":0, "forks_count":0, "last_activity_at":"2019-07-11T02:53:44.831+08:00", "_links":{ "self":"http://127.0.0.1/api/v4/projects/219", "issues":"http://127.0.0.1/api/v4/projects/219/issues", "merge_requests":"http://127.0.0.1/api/v4/projects/219/merge_requests", "repo_branches":"http://127.0.0.1/api/v4/projects/219/repository/branches", "labels":"http://127.0.0.1/api/v4/projects/219/labels", "events":"http://127.0.0.1/api/v4/projects/219/events", "members":"http://127.0.0.1/api/v4/projects/219/members" }, "archived":false, "visibility":"private", "resolve_outdated_diff_discussions":false, "container_registry_enabled":true, "issues_enabled":true, "merge_requests_enabled":true, "wiki_enabled":true, "jobs_enabled":true, "snippets_enabled":true, "shared_runners_enabled":true, "lfs_enabled":true, "creator_id":14, "namespace":{ "id":17, "name":"develop", "path":"develop", "kind":"group", "full_path":"develop", "parent_id":null }, "import_status":"none", "open_issues_count":0, "public_jobs":true, "ci_config_path":null, "shared_with_groups":[ ], "only_allow_merge_if_pipeline_succeeds":false, "request_access_enabled":false, "only_allow_merge_if_all_discussions_are_resolved":false, "printing_merge_request_link_enabled":true, "merge_method":"merge", "permissions":{ "project_access":null, "group_access":{ "access_level":40, "notification_level":3 } } },...]
参数这么多我们从中抽取出需要的部分
[{ "id":219, "name":"share-5.2.3.8", "name_with_namespace":"develop / share-5.2.3.8", "path_with_namespace":"develop/share-5.2.3.8", "http_url_to_repo":"http://127.0.0.1/develop/share-5.2.3.8.git", "created_at":"2019-07-10T19:59:29.855+08:00", "_links":{ "repo_branches":"http://127.0.0.1/api/v4/projects/219/repository/branches", }, },...]
第三步，遍历项目，根据项目id获取分支列表
接口地址：http://gitlab地址/api/v4/projects/项目id/repository/branches?private_token=xxx
传入参数：无
返回参数：
[{ "name":"master", "commit":{ "id":"d1b9747ba994f19fb6afb069b3751bd3cf21rrrr", "short_id":"d1b974123", "title":"添加仓库", "created_at":"2019-07-11T02:53:32.000+08:00", "message":"添加仓库", "author_name":"admin", "author_email":"admin@gmail.com", "authored_date":"2019-07-11T02:53:32.000+08:00", "committer_name":"admin", "committer_email":"admin@gmail.com", "committed_date":"2019-07-11T02:53:32.000+08:00", "parent_ids":[ "25cf5c94b9ddc762bd2be73e1e542ebd26adadf" ] }, "merged":false, "protected":true, "developers_can_push":false, "developers_can_merge":false },...]
第四步，遍历分支，根据分支name获取commits
注意，当title或message首单词为Merge，表示合并操作，剔除此代码量
接口地址：
http://gitlab地址/api/v4/projects/项目id/repository/commits?ref_name=master&private_token=xxx
返回参数： [{ "id":"d1b9747ba994f19fb6afb069b3751bd3cf21ag32", "author_name":"admin", "authored_date":"2019-07-11T02:53:32.000+08:00", "committer_email":"admin@gmail.com", "committed_date":"2019-07-11T02:53:32.000+08:00", "created_at":"2019-07-11T02:53:32.000+08:00", "author_email":"admin@gmail.com", "short_id":"d1b9747b", "title":"添加仓库", "parent_ids":[ "25cf5c94b9ddc762bd2be73e1e542ebd26aafd" ], "message":"添加仓库 ", "committer_name":"admin" },...]
第五步，根据commits的id获取代码量
接口地址:
http://gitlab地址/api/v4/projects/项目id/repository/commits/commits的id?private_token=xxx
返回参数：
[{ "id":"d1b9747ba994f19fb6afb069b3751bd3cf21334d", "short_id":"d1b9747b", "title":"添加仓库", "created_at":"2019-07-11T02:53:32.000+08:00", "parent_ids":[ "25cf5c94b9ddc762bd2be73e1e542ebd26ad7sdf" ], "message":"添加仓库 ", "author_name":"admin", "author_email":"admin@gmail.com", "authored_date":"2019-07-11T02:53:32.000+08:00", "committer_name":"admin", "committer_email":"admin@gmail.com", "committed_date":"2019-07-11T02:53:32.000+08:00", "stats":{ "additions":21, "deletions":8, "total":29 }, "status":null, "last_pipeline":null, "project_id":219 },...]
stats里面就是我们想要的代码量了，additions为新增，deletions为删除，total为总量。修改操作实际上是删除之后再新增。
需要注意的是，这里统计出来的代码量是代码行数。
小结
拿到这些数据之后，不管你是存数据库，还是存excel都很方便，完全可以让系统每天定时去跑，不需要手动执行任何命令。
Gitlab文档：https://docs.gitlab.com/ee/api/README.html
