在某些CI,CD平台部署服务上线后，我们往往难以获取当前部署应用的git版本，或由于时间、文档缺失难以获知当前上线版本，为此我们可以在应用中添加查询git版本接口。
以下实现方式以 gradle+ spring boot为例

在jar包中添加git info文件

首先在gradle中添加task，在代码库resource目录下生成git.properties文件

buildscript {
    dependencies {
        classpath("org.ajoberstar:grgit:1.1.0")
    }
}
task injectGitInfo {
    def gitRepo = org.ajoberstar.grgit.Grgit.open(project.file('.'))
    def propertyFile = file 'src/main/resources/git.properties'
    propertyFile.deleteOnExit()
    propertyFile.createNewFile()

    def props = new Properties()
    def map = ["git.branch"             : gitRepo.branch.current.name
               , "git.commitId"        : gitRepo.head().id
               , "git.commitAbbrevId" : gitRepo.head().abbreviatedId
               , "git.commitUserName" : gitRepo.head().author.name
               , "git.commitUserEmail": gitRepo.head().author.email
               , "git.commitMessage"   : gitRepo.head().fullMessage
               , "git.commitTime"      : gitRepo.head().time.toString()]
    props.putAll(map)

    props.store(propertyFile.newOutputStream(), "add git info")
}

为了在每次build jar的时候自动执行该任务，我们还需要添加

build.dependsOn injectGitInfo

增加git查询接口

首先利用Spring ConfigurationProperties注解读取git.properties

@Component
@PropertySource("classpath:git.properties")
@ConfigurationProperties("git")
@Data
public class GitCommitInfo {
    private String commitId;
    private String commitAbbrevId;
    private String commitTime;
    private String commitUserName;
    private String branch;
    private String commitUserEmail;
    private String commitMessage;
}

增加git查询接口

@RestController
public class GitCommitInfoController {
    @Autowired
    private GitCommitInfo gitCommitInfo;

    @GetMapping("/git_info")
    public GitCommitInfo getGitCommitInfo() {
        return gitCommitInfo;
    }
}

验证接口

curl http://localhost:8001/git_info

{
    "commitId": "72fe61581be54cf300aa0d8ea3b1ca65e0cbdb08",
    "commitAbbrevId": "72fe61",
    "commitTime": "1533721585",
    "commitUserName": "Huang Yan",
    "branch": "master",
    "commitUserEmail": "huangydyn@gmail.com",
    "commitMessage": "[Tech] implement git commit api"
}