Bug#866845: libidw-java FTBFS: PropertyMapImpl.java:383: error: unmappable character for encoding ASCII

[Markus Koschany]

Am 04.07.2017 um 17:10 schrieb Emmanuel Bourg:
> Le 4/07/2017 à 14:08, Markus Koschany a écrit :
> 
>> Maybe let's start with an upload to
>> experimental and we try it on some guinea pig javahelper packages first.
> 
> Why not but it looks like a lot of efforts for no gain (besides the
> satisfaction of compiling with a modern encoding, but that's not a
> feature with a visible impact for our users or on the maintenance). I'd
> rather focus on fixing the Java 9 issues.

I think it is very important that the encoding is handled consistently
by all build tools. I wanted to fix this for a while now because too
many times I had to specify UTF-8 explicitly and the build system tried
to use ASCII. UTF-8 is the de-facto standard encoding in Debian and
should be a first class citizen in Debian Java too. Thus said I don't
want to force this on you. Just give me some hints where I have to look
in the javahelper package and I experiment with the available options
myself.

>> Maybe the logic should be: IF NOT EXIST property encoding in pom.xml or
>> (IF EXIST debian/maven.properties AND debian/maven.properties CONTAINS
>> STRING project.build.sourceEncoding) SET encoding to UTF-8
> 
> For Maven projects this will fix nothing. If the project has UTF-8
> encoded files and doesn't define project.build.sourceEncoding, the
> package already FTBFS on the builders and we should be aware of it.
> 
> I think our Maven based packages are fine, they either have:
> - the source encoding defined in pom.xml
> - the source encoding defined in debian/maven.properties
> - no encoding specified but have only ASCII source files
> Setting a default encoding at the maven-debian-helper level will make no
> difference.

Lately I haven't discovered any issues in Maven, so the above might be
true. Though I still don't understand why there is an ASCII fallback in
Maven and maybe other Java tools. It appears to be completely
anachronistic.





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