Merrill,
> * Is there a better way in NAnt to getting the environment variables
set
> for each <exec>?
Aha, finally I get to give back!
If he's using 0.85, please see the below, the sum of a discussion Ian
MacLean and I had a while ago on this list (BTW, this is still possible
in 0.84, just uglier)... Ian's the mastermind behind the streamlined
code below.
<!-- This snippet only works for NAnt 0.85 (assume and up) -->
<script language="C#" >
<imports>
<import namespace="System.Runtime.InteropServices"/>
</imports>
<code><![CDATA[
[DllImport("kernel32.dll", SetLastError=true)]
static extern bool SetEnvironmentVariable(string lpName,
string lpValue);
[TaskName("setenv")]
public class SetEnvTask : Task {
private string _name;
private string _value;
[TaskAttribute("name", Required=true)]
public string EnvName {
get { return _name; }
set { _name = value; }
}
[TaskAttribute("value", Required=true)]
public string EnvValue {
get { return _value; }
set { _value = value; }
}
protected override void ExecuteTask() {
Log(Level.Info, "Setting env var {0} to {1}",
EnvName, EnvValue );
if ( ! SetEnvironmentVariable(EnvName, EnvValue) ) {
throw new BuildException(string.Format("Error
setting env var {0} to {1}", EnvName, EnvValue ) , Location);
}
}
}
]]></code>
</script>
<!-- echo current value if it exists -->
<if test="${environment::variable-exists('X')}" >
<echo message="X = ${environment::get-variable('X')}" />
</if>
<echo message="Setting new value"/>
<setenv name="X" value="test"/>
<echo message="X = ${environment::get-variable('X')}" />
------------------------------------------------------------------------
------------------------------------------------------------------------
----------------
This way you don't have to call a specific target - just use the custom
<setenv> task. And its simple to set variables between calls to other
tasks.
The above generates the following output:
Target(s) specified: build
[script] Scanning assembly "00f_4pst" for extensions.
[echo] Setting new value
[setenv] Setting env var X to test
[echo] X = test
build:
This is probably somthing worth considering adding to NAnt. Of course we
would need to use platform #ifdefs as the above is windows specific.
Ian
One tip: if someone is using
<echo message="X = ${sys.env.x}"/>
instead of
<echo message="X = ${environment::get-variable('x')}" />
they'll need to refresh sys.env after changing (or prior to checking)
values:
<sysinfo verbose="true"/>
<echo message="X = ${sys.env.x}"/>
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