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https://issues.apache.org/jira/browse/MJAR-50?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17957148#comment-17957148
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Matthias Bünger commented on MJAR-50:
-------------------------------------
This project has moved from Jira to GitHub Issues. This issue was migrated to
[apache/maven-jar-plugin#227|https://github.com/apache/maven-jar-plugin/issues/227].
> "Invalid Header" in jar's Manifest (Specification-Title attribute) when tab
> char in pom Description
> ---------------------------------------------------------------------------------------------------
>
> Key: MJAR-50
> URL: https://issues.apache.org/jira/browse/MJAR-50
> Project: Maven JAR Plugin (Moved to GitHub Issues)
> Issue Type: Bug
> Affects Versions: 2.0
> Reporter: Mike Laurie
> Assignee: Olivier Lamy
> Priority: Trivial
> Fix For: 2.2
>
>
> I typed a <description> element into my pom; the description spanned 2 lines,
> and my text editor put a tab char at the beginning of the 2nd line.
> The project built correctly, but another project depended on the resulting
> jar.
> The compilation of the depending project failed with "invalid header" on the
> jar I'd just compiled.
> When I looked at the jar's manifest, I saw the Specification-Title attribute
> had the tab character still in it from the <description> element.
> Replacing the tab with spaces in the pom solved the problem.
> However, this was valid xml that caused a compilation problem, so I think
> it's a minor bug with the jar production code.
> Note that the full description is trimmed before going into the manifest, so
> any
> Easy to work around, but it would be nice if whitespace in the <description>
> element were consolidated into spaces before copying to the manifest.
> Doesn't need any fancy layout stuff - just any multiple instances of tabs,
> spaces, lf or cr should be replaced by a single space.
> Try (I haven't tried to compile this!):
> {code}
> public String consolidateWhitespace(String input){
> StringTokenizer st = new StringTokenizer(input);
> StringBuffer rv = new StringBuffer();
> while (st.hasMoreTokens()){
> rv.append(st.nextToken() + (st.hasMoreTokens()?" ":""));
> }
> return rv.toString();
> }
> {code}
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