[bug#33868] [PATCH] gnu: calibre: Fix PDF to EPUB conversion.

[Mathieu Othacehe <m.othacehe@gmail.com>]

When trying to convert a PDF to EPUB, the following error occurs:

  File "/gnu/store/kz6bgqw9z7akj11zh20wkx14cgq0s3n2-calibre-3.35.0/lib/calibre/calibre/ebooks/pdf/pdftohtml.py", line 76, in pdftohtml
    _('Could not find pdftohtml, check it is in your PATH'))

Move poppler which provides pdftohtml from inputs to propagated-inputs to fix it.

* gnu/packages/ebook.scm (calibre)[inputs]: Move poppler from here ...
[propagated-inputs]: ... to here.
---
 gnu/packages/ebook.scm | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/gnu/packages/ebook.scm b/gnu/packages/ebook.scm
index e750c6cac..70434293a 100644
--- a/gnu/packages/ebook.scm
+++ b/gnu/packages/ebook.scm
@@ -5,6 +5,7 @@
 ;;; Copyright © 2017 Brendan Tildesley <brendan.tildesley@openmailbox.org>
 ;;; Copyright © 2017 Roel Janssen <roel@gnu.org>
 ;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
+;;; Copyright © 2018 Mathieu Othacehe <m.othacehe@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -121,7 +122,6 @@
        ("openssl" ,openssl)
        ("optipng" ,optipng)
        ("podofo" ,podofo)
-       ("poppler" ,poppler)
        ("python" ,python-2)
        ("python2-apsw" ,python2-apsw)
        ("python2-chardet" ,python2-chardet)
@@ -145,9 +145,9 @@
        ("python2-sip" ,python2-sip)
        ("python2-regex" ,python2-regex)
        ;; python2-unrardll is needed for decompressing RAR files.
-       ;; A program called 'pdf2html' is needed for reading PDF books
-       ;; in the web interface.
        ("sqlite" ,sqlite)))
+    (propagated-inputs
+     `(("poppler" ,poppler)))
     (arguments
      `(#:python ,python-2
        #:test-target "check"
-- 
2.20.1