Hello there.
While I am trying to package my project using jpackage 16.0.1 on Ubuntu
20 LTS I have difficulty in assembling the correct commands.
The documentation covers a lot but not everything. For example, it is
not clear to me when I have to provide an option - especially since I
meanwhile take a two step approach of building the appimage, then
tweaking something (that could have done by JPackage directly) and
finally building the DEB package.
While I believe the documentation is good enough, the error messages
presented by JPackage are not. Here is one example. Hopefully you agree
that the NullPointerException does not at all tell me what is wrong and
what I could improve on.
My feeling is that JPackage should do some better error handling and
come up with improved messages.
Hiran
$ jpackage --app-image build/app-image --verbose --dest build
[10:34:45.915] Warning: app-image dir not generated by jpackage.
[10:34:45.930] Running dpkg
[10:34:45.937] Command:
dpkg --print-architecture
[10:34:45.937] Output:
amd64
[10:34:45.939] Returned: 0
[10:34:45.944] Running dpkg
[10:34:45.961] Command:
dpkg -s coreutils
[10:34:45.962] Output:
Package: coreutils
Essential: yes
Status: install ok installed
Priority: required
Section: utils
Installed-Size: 7196
Maintainer: Ubuntu Developers <
ubuntu-devel-disc...@lists.ubuntu.com>
Architecture: amd64
Multi-Arch: foreign
Version: 8.30-3ubuntu2
Pre-Depends: libacl1 (>= 2.2.23), libattr1 (>= 1:2.4.44), libc6 (>=
2.28), libselinux1 (>= 2.1.13)
Description: GNU core utilities
This package contains the basic file, shell and text manipulation
utilities which are expected to exist on every operating system.
.
Specifically, this package includes:
arch base64 basename cat chcon chgrp chmod chown chroot cksum comm
cp
csplit cut date dd df dir dircolors dirname du echo env expand
expr
factor false flock fmt fold groups head hostid id install join
link ln
logname ls md5sum mkdir mkfifo mknod mktemp mv nice nl nohup nproc
numfmt
od paste pathchk pinky pr printenv printf ptx pwd readlink
realpath rm
rmdir runcon sha*sum seq shred sleep sort split stat stty sum sync
tac
tail tee test timeout touch tr true truncate tsort tty uname
unexpand
uniq unlink users vdir wc who whoami yes
Homepage: http://gnu.org/software/coreutils
Original-Maintainer: Michael Stone <mst...@debian.org>
[10:34:45.962] Returned: 0
[10:34:45.963] Running dpkg-deb
[10:34:45.965] Warning: app-image dir not generated by jpackage.
[10:34:45.967] Warning: app-image dir not generated by jpackage.
[10:34:45.967] java.lang.NullPointerException: Cannot invoke
"java.lang.CharSequence.length()" because "this.text" is null
at
java.base/java.util.regex.Matcher.getTextLength(Matcher.java:1769)
at java.base/java.util.regex.Matcher.reset(Matcher.java:415)
at java.base/java.util.regex.Matcher.<init>(Matcher.java:252)
at java.base/java.util.regex.Pattern.matcher(Pattern.java:1134)
at
jdk.jpackage/jdk.jpackage.internal.LinuxDebBundler.lambda$static$1(Linu
xDebBundler.java:83)
at
jdk.jpackage/jdk.jpackage.internal.LinuxPackageBundler.validate(LinuxPa
ckageBundler.java:72)
at
jdk.jpackage/jdk.jpackage.internal.Arguments.generateBundle(Arguments.j
ava:663)
at
jdk.jpackage/jdk.jpackage.internal.Arguments.processArguments(Arguments
.java:538)
at jdk.jpackage/jdk.jpackage.main.Main.execute(Main.java:98)
at jdk.jpackage/jdk.jpackage.main.Main.main(Main.java:52)
[10:34:45.969] jdk.jpackage.internal.PackagerException: Bundler DEB
Bundle failed because of java.lang.NullPointerException: Cannot invoke
"java.lang.CharSequence.length()" because "this.text" is null
at
jdk.jpackage/jdk.jpackage.internal.Arguments.generateBundle(Arguments.j
ava:685)
at
jdk.jpackage/jdk.jpackage.internal.Arguments.processArguments(Arguments
.java:538)
at jdk.jpackage/jdk.jpackage.main.Main.execute(Main.java:98)
at jdk.jpackage/jdk.jpackage.main.Main.main(Main.java:52)
Caused by: java.lang.NullPointerException: Cannot invoke
"java.lang.CharSequence.length()" because "this.text" is null
at
java.base/java.util.regex.Matcher.getTextLength(Matcher.java:1769)
at java.base/java.util.regex.Matcher.reset(Matcher.java:415)
at java.base/java.util.regex.Matcher.<init>(Matcher.java:252)
at java.base/java.util.regex.Pattern.matcher(Pattern.java:1134)
at
jdk.jpackage/jdk.jpackage.internal.LinuxDebBundler.lambda$static$1(Linu
xDebBundler.java:83)
at
jdk.jpackage/jdk.jpackage.internal.LinuxPackageBundler.validate(LinuxPa
ckageBundler.java:72)
at
jdk.jpackage/jdk.jpackage.internal.Arguments.generateBundle(Arguments.j
ava:663)
... 3 more
$
