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All the Perl that's Practical to Extract and Report

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  • Runtime.exec(String[] cmdarray, String[] envp, File dir) [sun.com] does envvars and working dirs for forked processes. Which is a little bit toward what you want...

    A major problem with envvars and working dirs as implemented in Perl, for example, is that they are process global. That wreaks havoc on the extreme isolation that Java strives for. So, I would argue that give Java's goals, the lack of %ENV and setcwd() is a feature.

    But the lack of copy? That's a real nuisance.

    • Yeah, I can set it for subprocesses, and I am. But I want to just set it for my current process so the subprocesses can inherit it. Also I am calling an ant build that unfortunately depends on environment variables (for the moment -- hopefully to be corrected next year, but there's no time right now), and since there is no way to set them, I had to rip out all of the nice code I had for calling that in my current process and pleasantly reading and organizing its output, and replace it with code to call it

      --
      J. David works really hard, has a passion for writing good software, and knows many of the world's best Perl programmers
      • A hack: when you first start the build, re-invoke ant via the java [apache.org] task with the proper envvars. Then all subsequent execs get that env.

        $work does a similar re-invoke to ensure that the build is running with the proper JDK and Ant (bundled with the code) to guarantee that all developers build with the selected JRE for each project.

  • I heard on a podcast recently that the NIO2 work that should (will?) be in Java 7 finally, finally has some sane file operations. (It's awful and idiotic that it's taken so long.) This has some examples: http://today.java.net/pub/a/today/2008/07/03/jsr-203-new-file-apis.html [java.net]
    • Thanks!

      I love this sentence:

      In Java 1.0 the language was so new we barely noticed that it had no reliable way to copy or move a file.

      I think those of us who were in an intoxicated crush with the language just noticed things like that and moved on. That is not a very inclusive "we" in that statement.

      --
      J. David works really hard, has a passion for writing good software, and knows many of the world's best Perl programmers