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https://issues.apache.org/jira/browse/SOLR-14889?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17201157#comment-17201157
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Uwe Schindler commented on SOLR-14889:
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That's very easy to explain: The expansion is done when the project is
configured!
Previously it was working because you just set a pointer to the (still changing
props). Here the problem is that the collect loop is running during
configuration phase.
To fix this the whole expand must be delayed using lazy evaluation. It's later,
will try before going to bed.
> improve templated variable escaping in ref-guide _config.yml
> ------------------------------------------------------------
>
> Key: SOLR-14889
> URL: https://issues.apache.org/jira/browse/SOLR-14889
> Project: Solr
> Issue Type: Task
> Security Level: Public(Default Security Level. Issues are Public)
> Components: documentation
> Reporter: Chris M. Hostetter
> Assignee: Chris M. Hostetter
> Priority: Major
> Attachments: SOLR-14889.patch
>
>
> SOLR-14824 ran into windows failures when we switching from using a hardcoded
> "relative" path to the solrRootPath to using groovy/project variables to get
> the path. the reason for the failures was that the path us used as a
> variable tempted into {{_config.yml.template}} to build the {{_config.yml}}
> file, but on windows the path seperater of '\' was being parsed by
> jekyll/YAML as a string escape character.
> (This wasn't a problem we ran into before, even on windows, prior to the
> SOLR-14824 changes, because the hardcoded relative path only used '/'
> delimiters, which (j)ruby was happy to work with, even on windows.
> As Uwe pointed out when hotfixing this...
> {quote}Problem was that backslashes are used to escape strings, but windows
> paths also have those. Fix was to add StringEscapeUtils, but I don't like
> this too much. Maybe we find a better solution to make special characters in
> those properties escaped correctly when used in strings inside templates.
> {quote}
> ...the current fix of using {{StringEscapeUtils.escapeJava}} - only for this
> one variable -- doesn't really protect other variables that might have
> special charactes in them down the road, and while "escapeJava" work ok for
> the "\" issue, it isn't neccessarily consistent with all YAML escapse, which
> could lead to even weird bugs/cofusion down the road.
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