对jks签名文件进行Base64编码

使用Github Actions构建Android项目需要签名，而jks文件又无法私密保存，故可以将其转为base64格式再设置安全变量 ( https://github.com/{...}/settings/secrets/actions )

openssl base64 < key.jks | tr -d '\r\n' | tee key.jks.base64.txt

---

.github\workflows\release.yml:

- name: Init Signature
        run: |
          touch local.properties
          echo ALIAS_NAME='${{ secrets.ALIAS_NAME }}' >> local.properties
          echo ALIAS_PASSWORD='${{ secrets.ALIAS_PASSWORD }}' >> local.properties
          echo KEY_PASSWORD='${{ secrets.KEY_PASSWORD }}' >> local.properties
          echo KEY_PATH='./key.jks' >> local.properties
          # 从Secrets读取无换行符Base64解码, 然后保存到到app/key.jks
          echo ${{ secrets.KEY_STORE }} | base64 --decode > $GITHUB_WORKSPACE/app/key.jks

---

build.gralde (:app):

 signingConfigs {
        release {
            //签名文件 从local.properties取值
            Properties pro = new Properties()
            InputStream input = project.rootProject.file("local.properties").newDataInputStream()
            pro.load(input)
            storeFile file(pro.getProperty("KEY_PATH"))
            storePassword pro.getProperty("KEY_PASSWORD")
            keyAlias pro.getProperty("ALIAS_NAME")
            keyPassword pro.getProperty("ALIAS_PASSWORD")
        }
    }

    buildTypes {
        release {
            signingConfig signingConfigs.release
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }

        debug {
            signingConfig signingConfigs.release
            applicationIdSuffix ".debug"
            versionNameSuffix "_debug"
        }
    }

设置Github Actions私有变量：

前往地址： https://github.com/ {user/project} /settings/secrets/actions

分别添加如下四个变量 (Repository secrets):
ALIAS_NAME 别名
ALIAS_PASSWORD别名密码
KEY_PASSWORD 密码
KEY_STORE 前面生成的base64.jks

参考Github项目地址：https://github.com/jing332/tts-server-android/blob/master/.github/workflows/release.yml