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From Jan Matèrne (JIRA) <j...@apache.org>
Subject [jira] Issue Comment Edited: (IVY-608) Add support for importing environment variables
Date Mon, 24 Sep 2007 13:06:50 GMT

    [ https://issues.apache.org/jira/browse/IVY-608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12529849
] 

jhm edited comment on IVY-608 at 9/24/07 6:05 AM:
----------------------------------------------------------

Regarding the maintenance of Ant code ... some thoughts ...

{code:title=EnvironmentLoading}
interface EnvironmentLoader {
    Map getEnvironment();
}
abstract class EnvironmentLoader {
    EnvironmentLoader getEnvLoader() {
        // 1. check for Java5, then return the Java5EnvLoader
        // 2. check if Ants <property> is on classpath; then use AntEnvLoader
        // 3. other implementations?
        // NoEnvLoader
    }
}
public class NoEnvironmentLoader implements EnvironmentLoader {
    Map getEnvironment() {
        // error statements
        // maybe an exception?
    }
}
public class AntEnvironmentLoader implements EnvironmentLoader {
    Map getEnvironment() {
        oata.taskdefs.Properties propTask = new ...
        // some more configuration needed?
        propTask.setEnvironment("env");
        propTask.execute();
        // read the env key-value pairs
        return ...
    }
}
public class Java5EnvLoader implements EnvironmentLoader {
    Map getEnvironment() {
        // based on Jings implementation
    }
}
{code}

      was (Author: jhm):
    Regarding the maintenance of Ant code ... some thoughts ...

interface EnvironmentLoader {
    Map getEnvironment();
}
abstract class EnvLoaderFactory {
    EnvironmentLoader getEnvLoader() {
        // 1. check for Java5, then return the Java5EnvLoader
        // 2. check if Ants <property> is on classpath; then use AntEnvLoader
        // 3. other implementations?
        // NoEnvLoader
    }
}
interface EnvironmentLoader {
    Map getEnvironment();
}
public class NoEnvironmentLoader implements EnvironmentLoader {
    Map getEnvironment() {
        // error statements
        // maybe an exception?
    }
}
public class AntEnvironmentLoader implements EnvironmentLoader {
    Map getEnvironment() {
        oata.taskdefs.Properties propTask = new ...
        // some more configuration needed?
        propTask.setEnvironment("env");
        propTask.execute();
        // read the env key-value pairs
        return ...
    }
}
public class Java5EnvLoader implements EnvironmentLoader {
    Map getEnvironment() {
        // based on Jings implementation
    }
}
  
> Add support for importing environment variables
> -----------------------------------------------
>
>                 Key: IVY-608
>                 URL: https://issues.apache.org/jira/browse/IVY-608
>             Project: Ivy
>          Issue Type: New Feature
>          Components: Core
>    Affects Versions: 2.0.0-alpha-2
>            Reporter: Jing Xue
>            Priority: Minor
>         Attachments: import-env-1.patch
>
>
> Ant supports importing environment variables into properties via the <properties environment="env"
/> task.  If an ivysettings.xml relies on an environment variable, the lack of support
for this feature in Ivy makes it difficult to reuse the same ivysettings.xml in a non-Ant
environment, such as in IvyDE.  I'm submitting a patch to add the support for JDK 1.5+. This
implementation will throw an exception when running in lesser JVMs.

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