Ant: The Definitive Guide, 2nd Edition

Executing External Programs

The exec task executes a system command or external program. The attributes for this task appear in Table 7-2.

Table 7-2. The exec task's attributes

Attribute	Description	Required	Default
append	Specifies whether you want to append to output and error files.	No	false
command	Deprecated. Use executable and nested arg elements. Specifies the command you want to run.	Exactly one of command or executable.
dir	Specifies the directory where you want to run the command.	No
error	Specifies the file where standard error output should be stored.	No
errorproperty	Specifies the name of a property where you want to store errors.	No
executable	Specifies the command you want to run (without any command-line arguments).	Exactly one of command or executable.
failifexecutionfails	Specifies the build should be stopped if the executable can't start.	No	true
failonerror	Specifies the build should be stopped if the task encounters errors.	No	false
input	Specifies the file where the task should take input to run the executable with.	No
inputstring	Specifies a string holding the input stream for the executable to run.	No
logError	Specifies you want to send error output to Ant's log.	No
newenvironment	Specifies old environment variables should not be passed as new environment variables to a forked JVM.	No	false
os	Specifies the operating systems in which the executable can be run.	No
output	Specifies the name of a file in which to store the output.	No
outputproperty ...