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Posted to users@maven.apache.org by alexworden <al...@gmail.com> on 2007/10/26 04:01:23 UTC
How does maven resolve plugin dependencies
Hi - this is a plea to someone with good command of the English language and
deep understanding of the guts of Maven 2... if such a person exists.
Please can explain what maven does to resolve a dependency. Currently when I
try:
mvn eclipse:eclipse
It fails miserably with the cryptic message...
The plugin 'org.apache.maven.plugins:maven-eclipse-plugin' does not exist or
no valid version could be found
I've tried using -e and -X but as usual none of the output makes any sense
to anyone but a maven developer.
(FYI - I've read the usual resources on this and would not be asking this
question if I found a satisfactory answer. I've read the "Better Builds..."
book and have to say I really don't like it and it didn't answer my
questions either. It's not written from a user perspective and hence is not
useful.)
Where is maven looking for this plugin? How does it know (and is it correct
in assuming) that it should be org.apache.maven.plugins:maven-eclipse-plugin
?
>From what I gather, maven should look in:
http://repo1.maven.org/maven2/eclipse/ but when I browse there, I don't find
any versions available. Is there something wrong with the maven repository
right now? very mysterious...
Please help if you can!
Thanks,
Alex
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Re: How does maven resolve plugin dependencies
Posted by alexworden <al...@gmail.com>.
Thanks for your suggestions Wayne. I found a way to fix the issue.
I searched in my local repository under org.apache.maven.plugins... and
found that it did not contain a version directory (that should contain the
jars etc) - just a couple of xml files describing the artifact etc.
I deleted the directory and behold! It worked!
I didn't delete the jars. Maven must have done something with them??
I still think it would be very useful if someone could deterministically
document what on earth maven is doing.
Wayne Fay wrote:
>
> Its simply not that straightforward as there are many things you can
> configure in various places etc. By default, Maven looks in the
> Central repo, but you can override this or set up mirrors etc.
>
> Try mvn -U -X eclipse:eclipse and if it still fails, copy and paste
> the log into pastebin.com and send the link here.
>
> Wayne
>
> On 10/26/07, alexworden <al...@gmail.com> wrote:
>>
>> Hi,
>>
>> The odd thing is that this was working just fine last week. I didn't
>> change
>> a thing, and now it's broken. It's not related to being behind a firewall
>> since I'm trying it from home, where I don't have a firewall - and it was
>> working here last week.
>>
>> What ports does maven try to connect to the repository on anyway?
>>
>> Where are the repositories configured?
>>
>> If I have a local repository configured, will maven also try to look in
>> the
>> default repositories?
>>
>> Again - if anyone can explain what maven is doing in order to look-up the
>> plugin location, that would be helpful.
>>
>> Thanks,
>>
>> Alex
>>
>>
>> alexworden wrote:
>> >
>> >
>> >
>> > Wayne Fay wrote:
>> >>
>> >>> The plugin 'org.apache.maven.plugins:maven-eclipse-plugin' does not
>> >>> exist or
>> >>> no valid version could be found
>> >>
>> >> There are several reasons why this will happen. In short, Maven is
>> >> unable to find the plugin. For new users, this generally means that
>> >> you're behind some kind of Internet proxy and simply have failed to
>> >> configure it in your settings.xml as is required.
>> >>
>> >>> From what I gather, maven should look in:
>> >>> http://repo1.maven.org/maven2/eclipse/ but when I browse there, I
>> don't
>> >>> find
>> >>> any versions available. Is there something wrong with the maven
>> >>> repository
>> >>> right now? very mysterious...
>> >>
>> >> This is incorrect. The correct url is:
>> >>
>> http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-eclipse-plugin/
>> >>
>> >> Wayne
>> >>
>> >> ---------------------------------------------------------------------
>> >> To unsubscribe, e-mail: users-unsubscribe@maven.apache.org
>> >> For additional commands, e-mail: users-help@maven.apache.org
>> >>
>> >>
>> >>
>> >
>> >
>>
>> --
>> View this message in context:
>> http://www.nabble.com/How-does-maven-resolve-plugin-dependencies-tf4694740s177.html#a13432043
>> Sent from the Maven - Users mailing list archive at Nabble.com.
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@maven.apache.org
>> For additional commands, e-mail: users-help@maven.apache.org
>>
>>
>
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>
>
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Re: How does maven resolve plugin dependencies
Posted by Wayne Fay <wa...@gmail.com>.
Its simply not that straightforward as there are many things you can
configure in various places etc. By default, Maven looks in the
Central repo, but you can override this or set up mirrors etc.
Try mvn -U -X eclipse:eclipse and if it still fails, copy and paste
the log into pastebin.com and send the link here.
Wayne
On 10/26/07, alexworden <al...@gmail.com> wrote:
>
> Hi,
>
> The odd thing is that this was working just fine last week. I didn't change
> a thing, and now it's broken. It's not related to being behind a firewall
> since I'm trying it from home, where I don't have a firewall - and it was
> working here last week.
>
> What ports does maven try to connect to the repository on anyway?
>
> Where are the repositories configured?
>
> If I have a local repository configured, will maven also try to look in the
> default repositories?
>
> Again - if anyone can explain what maven is doing in order to look-up the
> plugin location, that would be helpful.
>
> Thanks,
>
> Alex
>
>
> alexworden wrote:
> >
> >
> >
> > Wayne Fay wrote:
> >>
> >>> The plugin 'org.apache.maven.plugins:maven-eclipse-plugin' does not
> >>> exist or
> >>> no valid version could be found
> >>
> >> There are several reasons why this will happen. In short, Maven is
> >> unable to find the plugin. For new users, this generally means that
> >> you're behind some kind of Internet proxy and simply have failed to
> >> configure it in your settings.xml as is required.
> >>
> >>> From what I gather, maven should look in:
> >>> http://repo1.maven.org/maven2/eclipse/ but when I browse there, I don't
> >>> find
> >>> any versions available. Is there something wrong with the maven
> >>> repository
> >>> right now? very mysterious...
> >>
> >> This is incorrect. The correct url is:
> >> http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-eclipse-plugin/
> >>
> >> Wayne
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: users-unsubscribe@maven.apache.org
> >> For additional commands, e-mail: users-help@maven.apache.org
> >>
> >>
> >>
> >
> >
>
> --
> View this message in context: http://www.nabble.com/How-does-maven-resolve-plugin-dependencies-tf4694740s177.html#a13432043
> Sent from the Maven - Users mailing list archive at Nabble.com.
>
>
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>
>
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Re: How does maven resolve plugin dependencies
Posted by alexworden <al...@gmail.com>.
Hi,
The odd thing is that this was working just fine last week. I didn't change
a thing, and now it's broken. It's not related to being behind a firewall
since I'm trying it from home, where I don't have a firewall - and it was
working here last week.
What ports does maven try to connect to the repository on anyway?
Where are the repositories configured?
If I have a local repository configured, will maven also try to look in the
default repositories?
Again - if anyone can explain what maven is doing in order to look-up the
plugin location, that would be helpful.
Thanks,
Alex
alexworden wrote:
>
>
>
> Wayne Fay wrote:
>>
>>> The plugin 'org.apache.maven.plugins:maven-eclipse-plugin' does not
>>> exist or
>>> no valid version could be found
>>
>> There are several reasons why this will happen. In short, Maven is
>> unable to find the plugin. For new users, this generally means that
>> you're behind some kind of Internet proxy and simply have failed to
>> configure it in your settings.xml as is required.
>>
>>> From what I gather, maven should look in:
>>> http://repo1.maven.org/maven2/eclipse/ but when I browse there, I don't
>>> find
>>> any versions available. Is there something wrong with the maven
>>> repository
>>> right now? very mysterious...
>>
>> This is incorrect. The correct url is:
>> http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-eclipse-plugin/
>>
>> Wayne
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@maven.apache.org
>> For additional commands, e-mail: users-help@maven.apache.org
>>
>>
>>
>
>
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Re: How does maven resolve plugin dependencies
Posted by alexworden <al...@gmail.com>.
Wayne Fay wrote:
>
>> The plugin 'org.apache.maven.plugins:maven-eclipse-plugin' does not exist
>> or
>> no valid version could be found
>
> There are several reasons why this will happen. In short, Maven is
> unable to find the plugin. For new users, this generally means that
> you're behind some kind of Internet proxy and simply have failed to
> configure it in your settings.xml as is required.
>
>> From what I gather, maven should look in:
>> http://repo1.maven.org/maven2/eclipse/ but when I browse there, I don't
>> find
>> any versions available. Is there something wrong with the maven
>> repository
>> right now? very mysterious...
>
> This is incorrect. The correct url is:
> http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-eclipse-plugin/
>
> Wayne
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@maven.apache.org
> For additional commands, e-mail: users-help@maven.apache.org
>
>
>
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Re: How does maven resolve plugin dependencies
Posted by Wayne Fay <wa...@gmail.com>.
> The plugin 'org.apache.maven.plugins:maven-eclipse-plugin' does not exist or
> no valid version could be found
There are several reasons why this will happen. In short, Maven is
unable to find the plugin. For new users, this generally means that
you're behind some kind of Internet proxy and simply have failed to
configure it in your settings.xml as is required.
> From what I gather, maven should look in:
> http://repo1.maven.org/maven2/eclipse/ but when I browse there, I don't find
> any versions available. Is there something wrong with the maven repository
> right now? very mysterious...
This is incorrect. The correct url is:
http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-eclipse-plugin/
Wayne
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