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https://issues.apache.org/jira/browse/PDFBOX-5445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17758229#comment-17758229
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Marcelo Modesto commented on PDFBOX-5445:
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My first time here, so I need to say thank you for this project!
I was using version 2.0.29 and did some changes to *PDFMerger* and
*ExtractText* to process a bunch of PDFs files from a list.
So, I started reading Stack Overflow and Jira to verify if this feature could
be a wish for someone else and found this ticket.
I saw that you are now using *_picocli_* to process command line arguments.
Reading picocli docs I've found support for argument files to avoid problems
with command line length limitations - item *"3.9.1 - Argument Files for Long
Command Lines"*
Here is a example that I've tested with success:
{code:java}
$ cat pdf_list.txt
-i ./3.0.0/pdfbox/src/test/resources/input/hello3.pdf
-i ./3.0.0/pdfbox/src/test/resources/input/hello3.pdf
$ java -jar ./3.0.0/app/target/pdfbox-app-3.0.0.jar merge -o ./hello33.pdf
@./pdf_list.txt
{code}
So, I think the first part of this issue is resolved, isn't it?
About the changes that I've made to *ExtracText* (to avoid call JVM so many
times) I will do some tests and maybe I will open a new feature request.
> Add command line options to accept file containing list of files to merge
> -------------------------------------------------------------------------
>
> Key: PDFBOX-5445
> URL: https://issues.apache.org/jira/browse/PDFBOX-5445
> Project: PDFBox
> Issue Type: New Feature
> Affects Versions: 3.0.0 PDFBox
> Environment: windows 11, 10
> Reporter: Zbigniew Minciel
> Priority: Major
>
> Users of free MBox Mail Viewer require to export hundreds of emails into PDF
> and merge them into a single PDF document. Due to command line length
> limitations, smaller subsets of PDF mails have to be merged first and merge
> again multiple times. Merging must preserve order of emails. Option to accept
> a file containing a list of PDF files to merge would be very helpful.
> Another very useful option would be suppress "Page Break" at the end of PDF
> document to allow multiple small emails to fit on a page. Frequently, emails
> within the same thread are small.
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