问题
I wrote my own Eclipse plug-in for Eclipse Oxygen 3a. It works perfectly in Eclipse Oxygen 3a.
Now I'm being required to deploy the same plug-in in newer versions of Eclipse, but when the plug-in is being installed in, for instance, Eclipse Photon, the install window says:
Cannot perform operation. Computing alternate solutions, may take a while: ...
It indeed takes a long while and ends up saying that my plug-in will not be installed.
What to do to make this plug-in workable to more than one Eclipse version?
Update 1
As asked, this is the Require-Bundle:
Require-Bundle: org.eclipse.ui,
org.eclipse.core.runtime,
org.eclipse.jface.text,
org.eclipse.core.resources,
org.eclipse.ui.editors,
org.eclipse.ui.views;bundle-version="3.8.0",
org.eclipse.ui.ide,
org.eclipse.jdt.ui;bundle-version="3.13.52",
org.eclipse.jdt.core;bundle-version="3.13.50"
There is no Import-Bundle.
Update 2
The feature.xml file can be seen below. I have a plug-in site deployed in an internal Apache web server and use "Install new software" option in Help menu of Eclipse to install from thare.
<?xml version="1.0" encoding="UTF-8"?>
<feature
id="MyPluginFeature"
label="MyPlugin"
version="0.4.0"
provider-name="MyPlugin.com"
plugin="MyPlugin">
<description url="http://www.example.com/description">
</description>
<copyright url="http://www.example.com/copyright">
</copyright>
<license url="http://www.example.com/license">
</license>
<url>
<update label="MyPlugin site" url="http://acme.com/myplugin"/>
</url>
<requires>
<import plugin="org.eclipse.core.expressions" version="3.2.0" match="compatible"/>
<import plugin="org.eclipse.core.filesystem" version="1.3.0" match="compatible"/>
<import plugin="org.eclipse.core.runtime" version="3.12.0" match="compatible"/>
<import plugin="org.eclipse.core.resources" version="3.12.0" match="compatible"/>
<import plugin="org.eclipse.core.runtime" version="3.13.0" match="compatible"/>
<import plugin="org.eclipse.core.filesystem" version="1.7.0" match="compatible"/>
<import plugin="org.eclipse.text" version="3.6.0" match="compatible"/>
<import plugin="org.eclipse.osgi" version="3.7.0" match="compatible"/>
<import plugin="org.eclipse.equinox.common" version="3.8.0" match="compatible"/>
<import plugin="org.eclipse.core.jobs" version="3.2.0" match="compatible"/>
<import plugin="org.eclipse.equinox.registry" version="3.4.0" match="compatible"/>
<import plugin="org.eclipse.equinox.preferences" version="3.4.0" match="compatible"/>
<import plugin="org.eclipse.core.contenttype" version="3.3.0" match="compatible"/>
<import plugin="org.eclipse.equinox.app" version="1.0.0" match="greaterOrEqual"/>
<import plugin="org.eclipse.equinox.common" version="3.2.0" match="compatible"/>
<import plugin="org.eclipse.equinox.registry" version="3.2.0" match="compatible"/>
<import plugin="org.eclipse.osgi" version="3.2.0" match="compatible"/>
<import plugin="org.eclipse.core.commands" version="3.5.0" match="compatible"/>
<import plugin="org.eclipse.equinox.common" version="3.5.0" match="compatible"/>
<import plugin="org.eclipse.core.runtime" version="3.2.0" match="compatible"/>
<import plugin="org.eclipse.swt" version="3.103.0" match="compatible"/>
<import plugin="org.eclipse.jface" version="3.13.0" match="compatible"/>
<import plugin="org.eclipse.ui.workbench" version="3.105.0" match="compatible"/>
<import plugin="org.eclipse.core.expressions" version="3.4.0" match="compatible"/>
<import plugin="org.eclipse.swt" version="3.104.0" match="compatible"/>
<import plugin="org.eclipse.core.commands" version="3.4.0" match="compatible"/>
<import plugin="org.eclipse.equinox.common" version="3.3.0" match="compatible"/>
<import plugin="org.eclipse.core.runtime" version="3.5.0" match="compatible"/>
<import plugin="org.eclipse.compare.core" version="3.5.0" match="compatible"/>
<import plugin="org.eclipse.core.expressions" version="3.4.100" match="compatible"/>
<import plugin="org.eclipse.jface.text" version="3.8.0" match="compatible"/>
<import plugin="org.eclipse.ui" version="3.5.0" match="compatible"/>
<import plugin="org.eclipse.core.runtime" version="3.11.0" match="compatible"/>
<import plugin="org.eclipse.core.filesystem" version="1.2.0" match="compatible"/>
<import plugin="org.eclipse.core.filebuffers" version="3.5.0" match="compatible"/>
<import plugin="org.eclipse.core.resources" version="3.5.0" match="compatible"/>
<import plugin="org.eclipse.text" version="3.5.0" match="compatible"/>
<import plugin="org.eclipse.ltk.core.refactoring" version="3.7.0" match="compatible"/>
<import plugin="org.eclipse.jface.text" version="3.5.0" match="compatible"/>
<import plugin="org.eclipse.ui.navigator" version="3.3.200" match="compatible"/>
<import plugin="org.eclipse.compare" version="3.5.0" match="compatible"/>
<import plugin="org.eclipse.team.core" version="3.4.100" match="compatible"/>
<import plugin="org.eclipse.team.ui" version="3.4.100" match="compatible"/>
<import plugin="org.eclipse.ui.editors"/>
<import plugin="org.eclipse.ui.views" version="3.8.0" match="greaterOrEqual"/>
<import plugin="org.eclipse.ui.ide"/>
<import plugin="org.eclipse.jdt.ui" version="3.13.52" match="greaterOrEqual"/>
<import plugin="org.eclipse.jdt.core" version="3.13.50" match="greaterOrEqual"/>
</requires>
<plugin
id="org.eclipse.core.resources"
download-size="0"
install-size="0"
version="0.0.0"
unpack="false"/>
<plugin
id="org.eclipse.jdt.core"
download-size="0"
install-size="0"
version="0.0.0"
unpack="false"/>
<plugin
id="org.eclipse.core.runtime"
download-size="0"
install-size="0"
version="0.0.0"
unpack="false"/>
<plugin
id="org.eclipse.core.filesystem"
download-size="0"
install-size="0"
version="0.0.0"
unpack="false"/>
<plugin
id="org.eclipse.text"
download-size="0"
install-size="0"
version="0.0.0"
unpack="false"/>
<plugin
id="org.eclipse.equinox.common"
download-size="0"
install-size="0"
version="0.0.0"
unpack="false"/>
<plugin
id="org.eclipse.ui"
download-size="0"
install-size="0"
version="0.0.0"
unpack="false"/>
<plugin
id="org.eclipse.jface"
download-size="0"
install-size="0"
version="0.0.0"
unpack="false"/>
<plugin
id="org.eclipse.ui.workbench.texteditor"
download-size="0"
install-size="0"
version="0.0.0"
unpack="false"/>
<plugin
id="org.eclipse.ltk.core.refactoring"
download-size="0"
install-size="0"
version="0.0.0"
unpack="false"/>
<plugin
id="org.eclipse.ltk.ui.refactoring"
download-size="0"
install-size="0"
version="0.0.0"
unpack="false"/>
<plugin
id="MetaCoder"
download-size="0"
install-size="0"
version="0.4.0"
unpack="false"/>
</feature>
Update 3
Remediation window:
Update 4
After the unsuccessful atempt to install the plug-in in Eclipse JEE 2019-Jul I had the following error message:
Cannot complete the install because of a conflicting dependency.
Software being installed: MyPlugin 0.4.0 (MyPluginFeature.feature.group 0.4.0)
Software currently installed: Eclipse Platform 4.13.0.v20190916-1323 (org.eclipse.platform.feature.group 4.13.0.v20190916-1323)
Only one of the following can be installed at once:
Core File Systems 1.7.500.v20190620-1312 (org.eclipse.core.filesystem 1.7.500.v20190620-1312)
Core File Systems 1.7.0.v20170406-1337 (org.eclipse.core.filesystem 1.7.0.v20170406-1337)
Core File Systems 1.7.400.v20190518-1151 (org.eclipse.core.filesystem 1.7.400.v20190518-1151)
Cannot satisfy dependency:
From: MyPlugin 0.4.0 (MetaCoderFeature.feature.group 0.4.0)
To: org.eclipse.equinox.p2.iu; org.eclipse.core.filesystem [1.7.0.v20170406-1337,1.7.0.v20170406-1337]
Cannot satisfy dependency:
From: Eclipse Platform 4.13.0.v20190916-1323 (org.eclipse.platform.feature.group 4.13.0.v20190916-1323)
To: org.eclipse.equinox.p2.iu; org.eclipse.core.filesystem [1.7.500.v20190620-1312,1.7.500.v20190620-1312]
Update 5
IN the feature editor I decided to click the [Compute] button and all the dependencies were recomputed. As a result below we have the new feature.xml file:
<?xml version="1.0" encoding="UTF-8"?>
<feature
id="MyPluginFeature"
label="MyPlugin"
version="0.4.0"
provider-name="ACME"
plugin="MyPlugin">
<description url="http://www.example.com/description">
</description>
<copyright url="http://www.example.com/copyright">
</copyright>
<license url="http://www.example.com/license">
</license>
<url>
<update label="Site do MyPlugin" url="http://example.org/myplugin"/>
</url>
<requires>
<import plugin="org.eclipse.ui" version="3.5.0" match="compatible"/>
<import plugin="org.eclipse.core.runtime" version="3.12.0" match="compatible"/>
<import plugin="org.eclipse.jface.text" version="3.8.0" match="compatible"/>
<import plugin="org.eclipse.core.resources" version="3.12.0" match="compatible"/>
<import plugin="org.eclipse.ui.editors"/>
<import plugin="org.eclipse.ui.views" version="3.8.0" match="greaterOrEqual"/>
<import plugin="org.eclipse.ui.ide"/>
<import plugin="org.eclipse.jdt.ui" version="3.13.52" match="greaterOrEqual"/>
<import plugin="org.eclipse.jdt.core" version="3.13.50" match="greaterOrEqual"/>
</requires>
<plugin
id="MyPlugin"
download-size="0"
install-size="0"
version="0.4.0"
unpack="false"/>
</feature>
回答1:
In feature.xml only your own plug-ins should be specified as <plugin ... />, not the (Eclipse) plug-ins/bundles that are required.
For example,
<plugin
id="org.eclipse.core.resources"
download-size="0"
install-size="0"
version="0.0.0"
unpack="false"/>
makes the plug-in/bundle org.eclipse.core.resources of the current version (version="0.0.0" is a placeholder that will be replaced by the current version when building the update site) part of the thing that can be installed. Because org.eclipse.core.resources is a singleton plug-in/bundle (Bundle-SymbolicName: org.eclipse.core.resources; singleton:=true), it cannot be used with the plug-in/bundle of another version. This prevents your plug-in from being deployable in many Eclipse versions.
来源：https://stackoverflow.com/questions/60060807/how-to-make-a-eclipse-plug-in-deployable-in-many-eclipse-versions