一 environment指令指定一系列键值对，这些对值将被定义为所有步骤的环境变量或阶段特定步骤
environment{…}, 大括号里面写一些键值对，也就是定义一些变量并赋值，这些变量就是环境变量。环境变量的作用范围，取决你environment{…}所写的位置，你可以写在顶层环境变量，让所有的stage下的step共享这些变量，也可以单独定义在某一个stage下，只能供这个stage去调用变量，其他的stage不能共享这些变量。一般来说，我们基本上上定义全局环境变量，如果是局部环境变量，我们直接用def关键字声明就可以，没必要放environment{…}里面。
//全局
pipeline { agent any environment { unit_test = true } stages { stage('Example') { steps { script{ if(unit_test == true){ println "变量为真 " } }} } } }
二 dir ,deleteDir
dir()方法：就是改变当前的工作目录，在dir语句块里执行的其他路径或者相对路径
deleteDir()方法：默认递归删除WORKSPACE下的文件和文件夹，没有参数，使用这个方法会留下一个后遗症：
执行这个job的时候，你之前已经在这个工作目录下面，你再建一个目录就会报错：mkdir: 无法创建目录"testdata": 没有那个文件或目录，这是个很矛盾的报错
解决方法：使用cd重新切换到当前目录，再执行mkdir操作
举例如下：
pipeline{ agent any stages{ stage("deleteDir") { steps{ script{ println env.WORKSPACE dir("${env.WORKSPACE}/testdata"){ //切换到当前工作目录下的testdata目录 sh "pwd" //sh命令可以 sh "command..." 也可以 sh("command....") } sh("ls -al ${env.WORKSPACE}") deleteDir() // clean up current work directory //清空目录 sh("ls -al ${env.WORKSPACE}") } } } } }
执行结果
Started by user admin Running in Durability level: MAX_SURVIVABILITY [Pipeline] Start of Pipeline [Pipeline] node Running on Jenkins in /root/.jenkins/workspace/pipe-example [Pipeline] { [Pipeline] stage [Pipeline] { (deleteDir) [Pipeline] script [Pipeline] { [Pipeline] echo /root/.jenkins/workspace/pipe-example #println env.WORKSPACE
[Pipeline] dir Running in /root/.jenkins/workspace/pipe-example/testdata
[Pipeline] { [Pipeline] sh + pwd /root/.jenkins/workspace/pipe-example/testdata [Pipeline] }
[Pipeline] // dir
[Pipeline] sh
+ ls -al /root/.jenkins/workspace/pipe-example
总用量 4
drwxr-xr-x 4 root root 42 9月 4 11:33 .
drwxr-xr-x 28 root root 4096 9月 4 11:24 ..
drwxr-xr-x 2 root root 22 9月 4 11:28 testdata
drwxr-xr-x 2 root root 6 9月 4 11:33 testdata@tmp
[Pipeline] deleteDir
[Pipeline] sh
+ ls -al /root/.jenkins/workspace/pipe-example
总用量 4
drwxr-xr-x 2 root root 6 9月 4 11:33 .
drwxr-xr-x 28 root root 4096 9月 4 11:33 ..
[Pipeline] }
[Pipeline] // script
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
Finished: SUCCESS
三 readJSON,writeJSON
要使用这两个方法，必须安装插件Pipeline Utility Steps，否则报错：java.lang.NoSuchMethodError: No such DSL method 'readJSON'
我们先来使用readJSON
1 先建一个json文件，路径在工作目录的testdata/test_json.json
{ "NAME":"xinxin", "AGE":30, "CITY":"Beijing", "GENDER":"male" }
2 重写方法，有两种，路径放在工作目录下面的module/pipeline-demo-module.groovy
import hudson.model.*; def find_files(filetype) { def files = findFiles(glob:filetype) for (file in files) { println file.name } } def read_json_file(file_path) { //读取文件的情况 def propMap = readJSON file : file_path propMap.each { println ( it.key + " = " + it.value ) } } def read_json_file2(json_string) { //读取字符串的情况 def propMap = readJSON text : json_string propMap.each { println ( it.key + " = " + it.value ) } } return this;
最后设置pipeline stage文件内容
import hudson.model.*; println env.JOB_NAME println env.BUILD_NUMBER pipeline{ agent any stages{ stage("init") { steps{ script{ model_test = load env.WORKSPACE + "/module/pipeline-demo-module.groovy" //采用路径的拼接来读取 } } } stage("Parse json") { //分别调用两种方式读取 steps{ script{ json_file = env.WORKSPACE + "/testdata/test_json.json" model_test.read_json_file(json_file) println "================================" json_string = '{"NAME":"xinxin","AGE":30,"CITY":"Beijing","GENDER":"male"}' model_test.read_json_file2(json_string) } } } } }
结果：
Started by user admin Running in Durability level: MAX_SURVIVABILITY [Pipeline] Start of Pipeline [Pipeline] echo pipe-example [Pipeline] echo 58 [Pipeline] node Running on Jenkins in /root/.jenkins/workspace/pipe-example [Pipeline] { [Pipeline] stage [Pipeline] { (init) [Pipeline] script [Pipeline] { [Pipeline] load [Pipeline] { (/root/.jenkins/workspace/pipe-example/module/pipeline-demo-module.groovy) [Pipeline] } [Pipeline] // load [Pipeline] } [Pipeline] // script [Pipeline] } [Pipeline] // stage [Pipeline] stage [Pipeline] { (Parse json) [Pipeline] script [Pipeline] { [Pipeline] readJSON [Pipeline] echo NAME = xinxin [Pipeline] echo AGE = 30 [Pipeline] echo CITY = Beijing [Pipeline] echo GENDER = male [Pipeline] echo ================================ [Pipeline] readJSON [Pipeline] echo NAME = xinxin [Pipeline] echo AGE = 30 [Pipeline] echo CITY = Beijing [Pipeline] echo GENDER = male [Pipeline] } [Pipeline] // script [Pipeline] } [Pipeline] // stage [Pipeline] } [Pipeline] // node [Pipeline] End of Pipeline Finished: SUCCESS
下面看看writeJSON
看名称就知道是是将json格式的文件或者字符串写入文件
wirteJSON方法有两个必须的字段，分别是json和file，
json是一个json对象，是你需要把这个json写入到文件的内容，
第二个file字段是一个文件的路径，这个文件肯定在jenkins的workspace范围之内。
第三个字段pretty是可选，也就是可以选择把json对象插入到一个指定的位置。
1 修改module/pipeline-demo-module.groovy
import hudson.model.*; import groovy.json.*; //这个省略，在使用JsonOutput类的时候必须导入 def find_files(filetype) { def files = findFiles(glob:filetype) for (file in files) { println file.name } } def read_json_file(file_path) { def propMap = readJSON file : file_path propMap.each { println ( it.key + " = " + it.value ) } } def read_json_file2(json_string) { def propMap = readJSON text : json_string propMap.each { println ( it.key + " = " + it.value ) } } def write_json_to_file(input_json, tofile_path) { //增加的部分 def input = '' if(input_json.toString().endsWith(".json")) { input = readJSON file : input_json }else { //def output = new JsonOutput() //def new_json_object = output.toJson(input_json) //input = new_json_object input = readJSON text : input_json } writeJSON file: tofile_path, json: input } return this;
2 修改pipeline stage文件内容
println env.JOB_NAME println env.BUILD_NUMBER pipeline{ agent any stages{ stage("init") { steps{ script{ model_test = load env.WORKSPACE + "/module/pipeline-demo-module.groovy" } } } stage("write json") { steps{ script{ json_file = env.WORKSPACE + "/testdata/test_json.json" tojson_file = env.WORKSPACE + "/testdata/new_json.json" //new_json.json文件可以事先不存在，它会自动创建 model_test.write_json_to_file(json_file,tojson_file) println "================================" json_string = '{"NAME":"xinxin","AGE":30,"CITY":"Beijing","GENDER":"male"}' tojson_file = env.WORKSPACE + "/testdata/new_json1.json" model_test.write_json_to_file(json_string,tojson_file) } } } } }
执行结果
Started by user admin Running in Durability level: MAX_SURVIVABILITY [Pipeline] Start of Pipeline [Pipeline] echo pipe-example [Pipeline] echo 65 [Pipeline] node Running on Jenkins in /root/.jenkins/workspace/pipe-example [Pipeline] { [Pipeline] stage [Pipeline] { (init) [Pipeline] script [Pipeline] { [Pipeline] load [Pipeline] { (/root/.jenkins/workspace/pipe-example/module/pipeline-demo-module.groovy) [Pipeline] } [Pipeline] // load [Pipeline] } [Pipeline] // script [Pipeline] } [Pipeline] // stage [Pipeline] stage [Pipeline] { (write json) [Pipeline] script [Pipeline] { [Pipeline] readJSON [Pipeline] writeJSON [Pipeline] echo ================================ [Pipeline] readJSON [Pipeline] writeJSON [Pipeline] } [Pipeline] // script [Pipeline] } [Pipeline] // stage [Pipeline] } [Pipeline] // node [Pipeline] End of Pipeline Finished: SUCCESS
查看系统上面的文件
[root@localhost testdata]# ls new_json1.json new_json.json test_json.json [root@localhost testdata]# cat new_json.json {"NAME":"xinxin","AGE":30,"CITY":"Beijing","GENDER":"male"}[root@localhost testdata]# [root@localhost testdata]# cat new_json1.json {"NAME":"xinxin","AGE":30,"CITY":"Beijing","GENDER":"male"}[root@localhost testdata]#