Fat Jar Jar with Dependencies

snapcraft
1

Hello

Trying to build my first snap for my program highlighterpdf.

I have written it in java. I have it in a “fat jar” with all the dependencies.

Below is what I have in my Yaml file at the moment it fails with “The ‘parts’ property does not match the required schema: <ValidationError”

Here is my Yaml file:

name: highlighterpdf
title: HighlighterPdf
version: 1.0.2
summary: Highiight the text in a Pdf.
description:
        HighlighterPdf  is a free and open source software application that you can use to 
        highlight text in your pdf document. You can select text in a colour of your choice        
        and then save it.
base: core18

confinement: devmode

apps:
 highlighterpdf:
   extensions:
         - gnome-3-28
   command: java -jar highlighterpdf.jar
   environment:
         JAVA_HOME: $SNAP/usr/lib/jvm/java-11-openjdk-amd64
         PATH: $JAVA_HOME/jre/bin:$PATH
         plugs:
               -home
               -network
               -cups-control
parts:

Thanks for any help you can give me

Regards

Gerry

2

You appear to be missing the entire parts: section which defines what goes in the snap.

I wrote a blog post a couple of months back about snapping java apps. Maybe take a look at that for reference. https://snapcraft.io/blog/building-a-java-snap-by-example

3

Thank you I found your blog post really helpful

Sorry to be such a pain I have another problem now.
Here is my latest Yaml:
name: highlighterpdf
title: HighlighterPdf
version: 1.0.2
summary: Highiight the text in a Pdf.
description:
HighlighterPdf is a free and open source software application that you can use to
highlight text in your pdf document. You can select text in a colour of your choice
and then save it.
base: core18

confinement: devmode

apps:
highlighterpdf:
extensions:
- gnome-3-28
command: java -jar highlighterpdf.jar
environment:
JAVA_HOME: $SNAP/usr/lib/jvm/java-11-openjdk-amd64
PATH: $JAVA_HOME/jre/bin:$PATH
plugs:
-home
-network
-cups-control
parts:
highlighterpdf:
plugin: nil

now I get the error message

launch failed: KVM (vmx) is disabled by your BIOS.
Enter your BIOS setup and enable Virtualization Technology (VT).
An error occurred with the instance when trying to launch with ‘multipass’: returned exit code 2.
Ensure that ‘multipass’ is setup correctly and try again

But my bios does not have a setting for KVM to be enabled.

Thanks
Gerry

4

Hi

Thanks if you are reading this I found the problem I was looking in security when I should have looked in advanced in my bios.

I have another problem now but I will try and solve it myself as I think I have bothered you enough for the moment.

Regards
Gerry

5

Hi
Now for my next problem my Yaml at the moment is this:

title: HighlighterPdf
version: 1.0.2
summary: Highiight the text in a Pdf.
description:
        HighlighterPdf  is a free and open source software application that you can use to 
        highlight text in your pdf document. You can select text in a colour of your choice        
        and then save it.
base: core18

confinement: devmode

apps:
 highlighterpdf:
   extensions:
         - gnome-3-28
   command: java -jar $SNAP/highligherpdf.jar
   environment:
         JAVA_HOME: $SNAP/usr/lib/jvm/java-11-openjdk-amd64
         PATH: $JAVA_HOME/jre/bin:$PATH
         plugs:
               -home
               -network
               -cups-control
parts:
  highlighterpdf:
       source: /home/gerry/Desktop/highlighterpdf/highlighterpdf.jar
       plugin: dump```
 and I am getting this fault message:

Failed to pull source: unable to determine source type of '/home/gerry/Desktop/highlighterpdf/highlighterpdf.jar'.
Check that the URL is correct or consider specifying `source-type` for this part. See `snapcraft help sources` for more information

Is there a special format for the source-type section when I put it in it just comes up with another fault?

Thanks
Gerry
6

Can you please edit your post to surround your code with triple backticks ``` so that the formatting is preserved. When you don’t do that, the indentation is stripped which makes it impossible to read correctly because in YAML indentation is very important.

7

JAR files are not a valid source-type. To get the JAR file into your snap you need to use a different source, for example a directory containing the JAR with the dump plugin.

Note, also, that a fully-qualified path to a location outside of snapcraft’s understanding is likely to fail on any system that isn’t the one you’re currently using. You should move your source to a directory alongside the snap directory, and use a relative path, or into a location that is accessible via other source-types such as a git repository or a tar.gz file acccessible via HTTP(s).

8

Thanks for your help Daniel

Silly question when I use this line:

source-type: local
source: $SNAP/highlighterpdf_main/
and put my jar inside of the directory it comes back with the fault "highlighter_main is not a directory ?

Regards
Gerry