Please do not recommend setting up a local repository manager, I am
aware of
those but would like to try this approach.
My Maven project needs to be built in an offline computer. I am
trying to
create a snapshot of my repository using an online machine and mvn
dependency:go-offline, and then move this snapshot repository to the
offline
machine and build there.
My approach is basically "Taking Maven completely Off-Line" from
http://stubbisms.wordpress.com/2008/08/28/maven-is-to-ant-as-a-nail-gun-is-to-hammer-and-nails-you-need-to-move-on/
I can create the "offline repository" fine and it contains all my
plugins
and jar dependencies nicely. I move this for example to
c:\repo\offline-repo-4\. For example maven-resources-plugin looks
like:
C:\repo\offline-repo-4\org\apache\maven\plugins\maven-resources-
plugin\2.3>dir
19.03.2010 16:33 21 348 maven-resources-plugin-2.3.jar
19.03.2010 16:33 40 maven-resources-
plugin-2.3.jar.sha1
19.03.2010 16:33 4 683 maven-resources-plugin-2.3.pom
19.03.2010 16:33 40 maven-resources-
plugin-2.3.pom.sha1
At step 7 I add the "offline repository" config to my pom.xml:
<repositories>
<repository>
<releases />
<id>offline-repository</id>
<name>local offline build repo</name>
<url>file:///c:/repo/offline-repo-4/</url>
</repository>
</repositories>
So, before attempting to build at step 8, my local "normal"
repository at
C:\Documents and Settings\myusername\.m2 is empty, I have this
"offline
repo" that should contain all that I need, and I have configured my
pom.xml
to use it. To simulate offline build properly, I disable network
connection
before building. Then if I try offline building:
D:\projects\zzz2>mvn package -offline
[INFO]
NOTE: Maven is executing in offline mode. Any artifacts not already
in your
local
repository will be inaccessible.
[INFO] Scanning for projects...
[INFO]
---
---------------------------------------------------------------------
[INFO] Building safProto - AppFramework Application
[INFO] task-segment: [package]
[INFO]
---
---------------------------------------------------------------------
[INFO]
---
---------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO]
---
---------------------------------------------------------------------
[INFO] Error building POM (may not be this project's POM).
Project ID: org.apache.maven.plugins:maven-resources-plugin
Reason: POM 'org.apache.maven.plugins:maven-resources-plugin' not
found in
repository: System is offline.
org.apache.maven.plugins:maven-resources-plugin:pom:2.3
for project org.apache.maven.plugins:maven-resources-plugin
and if I try normal build without the -offline:
D:\projects\zzzz2>mvn package
[INFO] Scanning for projects...
[INFO]
---
---------------------------------------------------------------------
[INFO] Building safProto - AppFramework Application
[INFO] task-segment: [package]
[INFO]
---
---------------------------------------------------------------------
Downloading:
http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-resources-plugin/2.3/maven-resources-plugin-2.3.pom
[WARNING] Unable to get resource
'org.apache.maven.plugins:maven-resources-plugin:pom:2.3' from
repository
central (http://repo1.maven.org/maven2): Error transf
erring file: repo1.maven.org
Downloading:
file:///c:/repo/offline-repo-4//org/apache/maven/plugins/maven-
resources-plugin/2.3/maven-resources-plugin-2.3.pom
4K downloaded (maven-resources-plugin-2.3.pom)
Downloading:
http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-plugins/12/maven-plugins-12.pom
[WARNING] Unable to get resource
'org.apache.maven.plugins:maven-plugins:pom:12' from repository
central
(http://repo1.maven.org/maven2): Error transferring fil
e: repo1.maven.org
Downloading:
file:///c:/repo/offline-repo-4//org/apache/maven/plugins/maven-
plugins/12/maven-plugins-12.pom
11K downloaded (maven-plugins-12.pom)
Downloading:
http://repo1.maven.org/maven2/org/apache/maven/maven-parent/9/maven-parent-9.pom
[WARNING] Unable to get resource 'org.apache.maven:maven-parent:pom:
9' from
repository central (http://repo1.maven.org/maven2): Error
transferring file:
repo1.m
aven.org
Downloading:
file:///c:/repo/offline-repo-4//org/apache/maven/maven-parent/9/
maven-parent-9.pom
32K downloaded (maven-parent-9.pom)
Downloading: http://repo1.maven.org/maven2/org/apache/apache/4/apache-4.pom
[WARNING] Unable to get resource 'org.apache:apache:pom:4' from
repository
central (http://repo1.maven.org/maven2): Error transferring file:
repo1.maven.org
Downloading:
file:///c:/repo/offline-repo-4//org/apache/apache/4/apache-4.pom
4K downloaded (apache-4.pom)
Downloading:
http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-resources-plugin/2.3/maven-resources-plugin-2.3.jar
[WARNING] Unable to get resource
'org.apache.maven.plugins:maven-resources-plugin:maven-plugin:2.3'
from
repository central (http://repo1.maven.org/maven2): Err
or transferring file: repo1.maven.org
[INFO]
---
---------------------------------------------------------------------
[ERROR] BUILD FAILURE
[INFO]
---
---------------------------------------------------------------------
[INFO] A required plugin was not found: Plugin could not be found -
check
that the goal name is correct: Unable to download the artifact from
any
repository
Try downloading the file manually from the project website.
Then, install it using the command:
mvn install:install-file -DgroupId=org.apache.maven.plugins
-DartifactId=maven-resources-plugin -Dversion=2.3 -Dpackaging=maven-
plugin
-Dfile=/path/to/file
Alternatively, if you host your own repository you can deploy the file
there:
mvn deploy:deploy-file -DgroupId=org.apache.maven.plugins
-DartifactId=maven-resources-plugin -Dversion=2.3 -Dpackaging=maven-
plugin
-Dfile=/path/to/file -D
url=[url] -DrepositoryId=[id]
org.apache.maven.plugins:maven-resources-plugin:maven-plugin:2.3
from the specified remote repositories:
central (http://repo1.maven.org/maven2)
org.apache.maven.plugins:maven-resources-plugin:maven-plugin:2.3
from the specified remote repositories:
central (http://repo1.maven.org/maven2)
The latter creates to my "normal local repo" (C:\Documents and....)
following:
C:\Documents and
Settings\username\.m2\repository\org\apache\maven\plugins\maven-
resources-plugin\2.3>dir
19.03.2010 16:41 4 683 maven-resources-plugin-2.3.pom
19.03.2010 16:41 40 maven-resources-
plugin-2.3.pom.sha1
So it seems Maven is able to get the pom and it's sha1 from the
"offline
repo" but for some reason does not fetch the jar from the same place.
What's going on here....I would like to understand?
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