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https://issues.apache.org/jira/browse/SOLR-10298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15944871#comment-15944871
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Jan Høydahl commented on SOLR-10298:
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bq. The issue with the optimize-pdf script that comes from the asciidoctor-pdf
project is that it has a dependency on Ghostscript. Maybe that is a simple
problem to solve, but we have not yet spent any time trying to figure out if it
can be easily added to the ant target and not require that it be pre-installed
for anyone wanting to create a PDF locally.
We could let {{optimize-pdf}} be flexible, i.e. first looks for {{gs}} on path
and if not found look for {{docker}} and run gs in a container, and if not
found, issue a warning and an exit code. This modified script works on my mac:
https://gist.github.com/bfb1bed6a7ef6fd782ba9132ac5baab2
This would let any developer who has Docker installed be able to compress the
PDF without installing gs.
> Reduce size of new Ref Guide PDF
> --------------------------------
>
> Key: SOLR-10298
> URL: https://issues.apache.org/jira/browse/SOLR-10298
> Project: Solr
> Issue Type: Sub-task
> Security Level: Public(Default Security Level. Issues are Public)
> Components: documentation
> Reporter: Cassandra Targett
>
> The new Ref Guide PDF is ~31Mb in size, which is more than 2x the current PDF
> produced by Confluence (which is 14Mb).
> The asciidoctor-pdf project has a script to optimize the PDF, mostly by
> scaling down images. When I run this tool on the new PDF, the size is reduced
> to ~18Mb. (More info on this script:
> https://github.com/asciidoctor/asciidoctor-pdf#optional-scripts).
> Some of the current image files are very large in size, so I believe that by
> scaling the images down, we can make the size smaller without adding a step
> in the build to run the optimize script programmatically (it also has a
> dependency on GhostScript, so it would be nice to not add another dependency
> if it can be avoided).
> The new PDF is also about 300 pages longer, but this issue is primarily
> concerned with file size. However, reducing the number of pages will also
> make it smaller. A few things that could be tried to reduce the # of pages:
> * Reduce font sizes
> * Increase page margins
> * Review options for when a forced page-break is used and modify if possible
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