当前位置：网站首页>Ant advanced task

Ant advanced task

2022-07-27 10:13:00 【51CTO】

One Task Command line parameters of

There are some task Acceptable parameters , And pass it to another process . In order to include space characters in variables , Nested arg Elements .

Attribute Description Required

value A command line variable ; Can contain space characters . Only one

line Space separated list of command line variables .

file File name as a command line variable ; Will be replaced by the absolute name of the file .

path As a single command line variable path-like String ; Or as a separator ,Ant Will turn it into a platform specific separator .

Example

<arg value="-l -a"/> Is a single command line variable with spaces .

<arg line="-l -a"/> Is a command line variable separated by two spaces .

<arg path="/dir;/dir2:\dir3"/> Is a command line variable , Its value is DOS The system is \dir;\dir2;\dir3; stay Unix The system is /dir:/dir2:/dir3 .

Two Time stamp <tstamp/>

Use the current time and date in the build environment , Mark the output of a build task in some way , In order to record when it was generated , This is often desirable . This may involve editing a file , To insert a string specifying the date and time , Or combine this information into JAR or zip The file name of the file .

This need is through simple but very useful tstamp Task to solve . This task is usually called at the beginning of a generation process , Like in one init On target . This task does not require attributes , In many cases, just <tstamp/> That's enough .

tstamp No output ; contrary , It is set according to the current system time and date Ant attribute . Here is tstamp Set some properties of 、 Description of each attribute , And examples of values to which these attributes can be set ：

Attribute description example

DSTAMP Set as current date , The default format is yyyymmdd 20031217

TSTAMP Set to current time , The default format is hhmm 1603

TODAY Set as current date , With full month 2003 year 12 month 17 Japan

for example , In the previous section , We created a JAR file ：

Calling tstamp After the mission , We can name this according to the date JAR file , As shown below ：

therefore , If the task is 2003 year 12 month 17 Day call , The JAR The file will be named package-20031217.jar.

It can also be configured tstamp Task to set different properties , Apply a time offset before or after the current time , Or format the string in a different way . All of these are using a nested format Elements , As shown below ：

       
       <
       
       tstamp
       
       > 
       
       <
       
       format 
       
       property=
       
       "OFFSET_TIME" 
       
       pattern=
       
       "HH:mm:ss" 
       
       offset=
       
       "10" 
       
       unit=
       
       "minute"
       
       /> 
       
       </
       
       tstamp
       
       >
      
1.
2.
3.
4.
5.

The above list will OFFSET_TIME Property is set to the distance from the current time 10 Hours after minutes 、 Minutes and seconds .

The characters used to define the format string are the same as java.text.SimpleDateFormat The format characters defined by the class are the same .

3、 ... and send out email Of task

Use SMTP The server sends mail

Example ：

       
       <
       
       mail 
       
       mailhost=
       
       "smtp.myisp.com" 
       
       mailport=
       
       "1025" 
       
       subject=
       
       "Test build"
       
       > 
       
       <
       
       from 
       
       address=
       
       "[email protected]"
       
       /> 
       
       <
       
       to 
       
       address=
       
       "[email protected]"
       
       /> 
       
       <
       
       message
       
       >The {buildname} nightly build has completed
       
       </
       
       message
       
       > 
       
       <
       
       fileset 
       
       dir=
       
       "dist"
       
       > 
       
       <
       
       includes 
       
       name=
       
       "**/*.zip"
       
       /> 
       
       </
       
       fileset
       
       > 
       
       </
       
       mail
       
       >
      
1.
2.
3.
4.
5.
6.
7.
8.

Four ssh and scp

stay ant in , Use ssh Command to remotely start and stop tomcat

Here is the remote stop 192.168.0.2 On this machine ｔｏｍｃａｔ：

       
       <
       
       target 
       
       name=
       
       "sshexecstop" 
       
       >
       
       < 
       
       sshexec 
       
       host=
       
       "192.168.0.2" 
       
       username=
       
       "root" 
       
       password=
       
       "123456" 
       
       trust=
       
       "true" 
       
       command=
       
       "cd /usr/local/tomcat/bin;./shutdown.sh" 
       
       />
       
       < 
       
       /target
       
       >
      
1.
2.
3.

The following is remote startup 192.168.0.2 On this machine ｔｏｍｃａｔ：

       
       <
       
       target 
       
       name=
       
       "sshexecstart"
       
       >
       
       <
       
       sshexec 
       
       host=
       
       "192.168.0.2" 
       
       username=
       
       "root" 
       
       password=
       
       "123456" 
       
       trust=
       
       "true" 
       
       command=
       
       "cd /usr/local/tomcat/bin;./startup.sh" 
       
       />
       
       </
       
       target
       
       >
      
1.
2.
3.

stay ant in , Use scp Put the local file （appwar A file in a directory ） Remote copy to another machine tomcat Next ：

       
       <
       
       target 
       
       name=
       
       "copy" 
       
       >
       
       < 
       
       scp 
       
       todir=
       
       "root:[email protected]:/usr/local/tomcat/webapps/" 
       
       trust=
       
       "true"
       
       >
       
       < 
       
       fileset 
       
       dir=
       
       "/home/cruisecontrol/projects/eholderWeb/build/appwar" 
       
       />
       
       < 
       
       /scp
       
       >
       
       < 
       
       /target
       
       >
      
1.
2.
3.
4.
5.

5、 ... and input

Interactive input with users task

       
       < 
       
       input 
       
       message=
       
       " Please select one Target " 
       
       validargs=
       
       "compile,jar,test"  
       
       addproperty=
       
       "my.input"
       
       />
      
1.

6、 ... and exec

Execute other processes task

       
       <
       
       exec 
       
       executable=
       
       "cmd.exe"
       
       >
       
       <
       
       arg 
       
       line=
       
       "/c start ​​​http://localhost:8080​​​>
       
       </exec>
      
1.
2.
3.

VII. Others task

if task
ant It could be in target Level carry if Judge (unless,if attribute ), But it's too inconvenient .

Conditions
but Ant A bunch of pre packaged condition It's very convenient . these condition Proceed completely from reality , Including whether the file exists , http://localhost:8080 Connectivity can be used as a condition , see Ant Reference manual for .

For task
Support "a,b,c,d" Loop of string array and file directory ,Fileset The cycle of .

Parallel task
Parallel Very useful , For example, I want to drive tomcat, While doing something else , You need to use it , Otherwise, it will only be used spawn=true Attribute to tomcat Run in the background .spawn There are a lot of bad things , For example, you can't immediately console See the message , stop it ant Running cannot turn tomcat Turn it off, etc .

Parallel Equivalent to a container , Every one in it task Will be executed in parallel . If you want to put some task Sequential execution , It is equivalent to () Of Sequential task wrap up .

Waitfor task
Pause ant Execute until the conditions are met , such as <waitfor><http url=http://localhost:8080/></waitfor> Will wait tomcat The execution will continue after startup .

8、 ... and antcall And ant

depends：depends Medium targets In Ben target Before execution, call .

antcall ： Used to call the same build.xml Other in target, Equivalent to function call in high-level language .

ant： Call other build.xml Medium target.

Nine Customize TASK Use

ANT There are many built-in task, image copy、replace、javac wait , But sometimes some specific tasks are needed to complete the operation , For example, when generating JAD file when , Need one Midlet-Jar-Size Parameters of , obtain JAR File size , But through the inside task It can't be done , Therefore, you can write your own classes to achieve this function , But it must be guaranteed This kind of certificate is from Task Class inherited .

example ：

       
       <
       
       taskdef 
       
       name=
       
       "filesize" 
       
       classname=
       
       "ant.FileSizeTask" 
       
       classpath=
       
       "${LIB_PATH}/FileSizeTask.jar" 
       
       /> 
       
       <
       
       filesize 
       
       file=
       
       "${Base}/Demo_Build/${jarName}" 
       
       property=
       
       "size" 
       
       /> 
       
       <
       
       replace 
       
       dir=
       
       "store" 
       
       includes=
       
       "${jadName}" 
       
       encoding=
       
       "UTF-8"
       
       > 
       
       <
       
       replacefilter 
       
       token=
       
       "@[email protected]" 
       
       value=
       
       "${size}" 
       
       /> 
       
       </
       
       replace
       
       >
      
1.
2.
3.
4.
5.