From: Peter Lane <peter@peterlane.info>
To: kawa@sourceware.org
Subject: import path vs CLASSPATH
Date: Wed, 08 Feb 2017 18:37:00 -0000 [thread overview]
Message-ID: <4f61b6b2-78f7-a327-6eb3-7778eab00233@peterlane.info> (raw)
(This is not really a question, but more an observation - perhaps a
curious query.)
I found there's a difference between import path and CLASSPATH, with
respect to how kawa locates libraries: "import path" seems to be
relative to the input program, whereas CLASSPATH is relative to the caller.
The Kawa documentation says "The default search path is |"."| - i.e.
just search relative to the current root"; I was expecting the current
root to be the directory where I ran kawa, but it appears to be the
location of the program.
e.g. if I use -Dkawa.import.path="./*.sld", library files are found only
in the same directory as the program I run:
> kawa --r7rs -Dkawa.import.path="./*.sld" dir/program.sps
only finds libraries within dir, and fails if the required library is in
the current (caller's) directory. (If the libraries are in 'dir' the
import is unnecessary: kawa --r7rs dir/program.sps will find
dir/mylibrary.sld.)
However, if I compile the library: > kawa -C mylibrary.sld, and set
CLASSPATH=.
then the .class file for the library will be found relative to the
caller's directory.
I came across this because I'm working with a Java library and writing
lots of scripts for different tasks. Some common functions are bundled
up in a library, for them all to use. The library sits in the directory
I run kawa from, and child directories hold the scripts. I've set my
run script to use the import path:
-Dkawa.import.path="$(cd "$(dirname "$0")" ; pwd)/*.sld"
which finds the script's path and sets up an absolute path to the import
location.
Now I'm aware of this, it's not a problem, but it did confuse me for a bit.
--
Peter Lane
http://peterlane.info/scheme.html
next reply other threads:[~2017-02-08 18:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-08 18:37 Peter Lane [this message]
2017-02-08 21:42 ` Per Bothner
2017-02-13 19:31 ` Peter Lane
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