warnings about plugins without a proper manifest

[shirish]

What steps will reproduce the problem?

1. Just start with josm with few plugins
2. You get warnings of plugins without a proper manifest as can be seen in the Status report .

What is the expected result?

There shouldn't be any warnings.

What happens instead?

You get warnings and have no idea if the plugin is working correctly or not.

Please provide any additional information below. Attach a screenshot if possible.

Build-Name:Debian
Build-Date:2016-09-19 14:42:27
Revision:10966
Is-Local-Build:false
Debian-Release:0.0.svn10966+dfsg-2

Identification: JOSM/1.5 (10966 Debian en) Linux Debian GNU/Linux testing (stretch)
Memory Usage: 233 MB / 444 MB (158 MB allocated, but free)
Java version: 1.8.0_102-8u102-b14.1-2-b14, Oracle Corporation, OpenJDK 64-Bit Server VM
Screen: :0.0 1600x900
Maximum Screen Size: 1600x900
Java package: openjdk-8-jre:amd64-8u102-b14.1-2
Java ATK Wrapper package: libatk-wrapper-java:all-0.33.3-9
VM arguments: [-Djosm.restart=true, -Djava.net.useSystemProxies=true]

Plugins:
+ osmarender (32699)
+ public_transport (32796)

Last errors/warnings:
- W: PluginException: : org.openstreetmap.josm.plugins.PluginException: The plugin file '/usr/share/josm/plugins/lakewalker.jar' does not include a Manifest.
- W: Failed to scan file 'lakewalker.jar' for plugin information. Skipping.
- W: PluginException: : org.openstreetmap.josm.plugins.PluginException: The plugin file '/usr/share/josm/plugins/routing.jar' does not include a Manifest.
- W: Failed to scan file 'routing.jar' for plugin information. Skipping.
- W: PluginException: : org.openstreetmap.josm.plugins.PluginException: The plugin file '/usr/share/josm/plugins/colorscheme.jar' does not include a Manifest.
- W: Failed to scan file 'colorscheme.jar' for plugin information. Skipping.
- W: PluginException: : org.openstreetmap.josm.plugins.PluginException: The plugin file '/usr/share/josm/plugins/openvisible.jar' does not include a Manifest.
- W: Failed to scan file 'openvisible.jar' for plugin information. Skipping.
- W: PluginException: : org.openstreetmap.josm.plugins.PluginException: The plugin file '/usr/share/josm/plugins/editgpx.jar' does not include a Manifest.
- W: Failed to scan file 'editgpx.jar' for plugin information. Skipping.

[sebastic]

The plugins in questions seem to originate from the josm-plugins package, the upstream ant build.xml explicitly removes the manifest files, so I don't think having them missing is something to worry about as it seems to be intended.

[skyper]

Used to have major problems mixing josm-plugins-package and plugins directly from josm, see #7483.

[Don-vip]

The package josm-plugins has since been ​removed.