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To: cygwin AT cygwin DOT com, bug-gnu-emacs AT mail DOT gnu DOT org, user AT ant DOT apache DOT org
Subject: Re: [BUG] emacs cygwin compile.el next-error fails with Ant
References: <a0he5dd5yv DOT fsf AT panix3 DOT panix DOT com> <3F1E9317 DOT 9040204 AT hekimian DOT com>
From: Mark Evenson <evenson AT panix DOT com>
Date: 24 Jul 2003 08:04:41 -0400
In-Reply-To: <3F1E9317.9040204@hekimian.com>
Message-ID: <a0n0f4yvty.fsf@panix3.panix.com>
Lines: 47
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3
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Following the suggestion of Joe Buehler the following scripts placed in
$HOME/bin, with ant-emacs chmod'd to execute

ant-emacs
----------------------------------------------------------------------
#!/bin/sh
ANT_ARGS="$ANT_ARGS -emacs" 
ANT_OPTS="$ANT_OPTS -Dbuild.compiler.emacs=true" 
export ANT_ARGS ANT_OPTS
ant $* 2>&1 | gawk -f $HOME/bin/transform.gawk 2>&1 | sed s/\\r//g | sed s/^gawk.*$//
----------------------------------------------------------------------

and the following gawk script 

transform.gawk
----------------------------------------------------------------------
/^[A-Z]:/ {
      command = "tr \\\\\\\\\ / | xargs cygpath "; 
      printf "%s", $1 | command;  
      close(command); 
      for (i = 2; i < NF; i++) {
        printf " %s", $i;
      };
      printf "\n";

      next;
}
{print}
----------------------------------------------------------------------

will make next-error work in compile.el with Emacs running under cygwin.
This is not perfect, as it changes the output slightly (I have a extra
newline emitted somehow), but it might help someone else.

After some investigation and further reflection, I think this can be
classified as a problem with Ant, and not with cygwin and/or Emacs as Ant
should emit "UNIX normalized" pathnames if it is running under
cygwin/Emacs.  The problem with implementing this is that Ant is merely
passing back the output from a native win32 javac which necessarily needs
the platform dependent path.separator variable.  Maybe I will have time his
weekend to look into this.

-- 
Mark Evenson <evenson AT panix DOT com>

"A screaming comes across the sky.  It has happened before, but there is
nothing to compare to it now."

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