Gábor Boskovits <boskovits@gmail.com> writes:

> Hello Chris!
>
> Could you help me out on this?
>
> It seems that I should somehow extract the version string from the input to
> use in substitute*, to fix the version string in tests. What would be the
> proper way of doing this?

It looks like the existing code is already substituting the version
string (by hard-coding it):

--8<---------------cut here---------------start------------->8---
(arguments
     `(#:jar-name "java-ops4j-pax-tinybundles.jar"
       #:source-dir "src/main/java"
       #:test-exclude
       ;; Abstract base classes for other tests
       (list "**/BndTest.java" "**/CoreTest.java")
       #:phases
       (modify-phases %standard-phases
         (add-before 'check 'fix-version
           (lambda _
             ;; This test has a reference to an old version of bndlib we are not
             ;; packaging.  It uses the version referenced in pom.xml.  We replace
             ;; it with our own version.
             (substitute* "src/test/java/org/ops4j/pax/tinybundles/bnd/BndTest.java"
               (("2.4.0.201411031534") "3.4.0")))))))
--8<---------------cut here---------------end--------------->8---

I think we could probably just make a change like the following (I
haven't tested this, though):

--8<---------------cut here---------------start------------->8---
             (substitute* "src/test/java/org/ops4j/pax/tinybundles/bnd/BndTest.java"
-               (("2.4.0.201411031534") "3.4.0")))))))
+               (("2.4.0.201411031534") ,(package-version java-aqute-bndlib))))))))
--8<---------------cut here---------------end--------------->8---

The comma is 'unquote' (see: (guile) Expression Syntax), which should
insert the package version of java-aqute-bndlib into the quasi-quoted
list.

Does that help?

-- 
Chris