Grégory Joseph created ARCHETYPE-458:
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Summary: Ability to generate empty directories... with Git or
other excluded files.
Key: ARCHETYPE-458
URL: https://jira.codehaus.org/browse/ARCHETYPE-458
Project: Maven Archetype
Issue Type: Bug
Affects Versions: 2.2
Reporter: Grégory Joseph
Ok, so following ARCHETYPE-157, empty directories can be generated by
configuring {{includeEmptyDirs}} for the {{maven-resources-plugin}}. However,
if one is using Git (or presumably other VCS behaving similarly), really empty
directories can't really be source-controlled.
I was hoping to be able to use the usual git trick of having
{{.empty-placeholder}} files in my archetype sources. That works, those files
are in the archetype jar, even without reconfiguring the resources plugin. My
next step was thus to configure my {{fileSet}} as such:
{code}
<fileSet encoding="UTF-8">
<directory>src/main/webapp/</directory>
<excludes>
<exclude>**/.emptydir-placeholder</exclude>
</excludes>
<includes>
<include>**/*</include>
</includes>
</fileSet>
{code}
However, this doesn't work, for a combination of two reasons, I believe:
* The archetype jar does not contain *directory* entries when files are in
these directories (regardless of {{includeEmptyDirs}})
* The archetype:generate mojo copies a fileset by looking directly are the zip
entries, not by somehow normalizing those entries. So it sees no entry for my
"empty" directory {{/foo}}, but only the one {{/foo/.empty-placeholder}} entry,
which is excluded.
As a consequence, the empty directory is, well, excluded and not generated.
I haven't found a way to force the addition of directory entries in the
archetype jar ({{archetype:jar}}'s configuration is pretty limited, and seems
to generate the artifact on its own (straight to a ZipOutputStream)
A workaround is to not exclude the {{**/.emptydir-placeholder}} files in the
archetype descriptor, but rather in the {{<resources>}} section of the build -
so I can keep them in my Git-managed sources, but they're not in the archetype
artifact. This somehow feels less elegant to me, but I'll give it a go anyway.
{code}
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
<excludes>
<exclude>**/.emptydir-placeholder</exclude>
</excludes>
</resource>
...
{code}
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