Trac #21513: Package rst2ipynb

`rst2ipynb` converts rst source to ipynb worksheet.

- upstream tarball : https://pypi.python.org/packages/59/74/ed45a207317c
8dbfe987db83841ba4d262cfe9fc561fe3180185f82f1e95/rst2ipynb-0.2.1.tar.gz

This package will be used through the straightforward `sage -rst2ipynb`
command, see #21514 You can still test it by hand as follows: install
`pandoc` on your system and if you have a `myfile.rst` do:

{{{
sage -sh
rst2ipynb --kernel='sagemath' myfile.rst -o myfile.ipynb
}}}

URL: https://trac.sagemath.org/21513
Reported by: tmonteil
Ticket author(s): Thierry Monteil, Nicolas M. Thiéry
Reviewer(s): Sébastien Labbé

build/pkgs/rst2ipynb/SPKG.txt

@@ -0,0 +1,34 @@
+= rst2ipynb =
+
+== Description ==
+
+The rst2pynb program converts a standalone reStructuredText file to a
+Jupyter notebook file.
+
+This is currently achieved by converting to markdown with pandoc and
+then to Jupyter notebook using notedown, plus some configuration and
+tweaks.
+
+== License ==
+
+BSD 3-Clause License
+
+== Upstream Contact ==
+
+Authors: Scott Sievert and Nicolas M. Thiéry
+Home page: https://github.com/nthiery/rst-to-ipynb
+
+== Dependencies ==
+
+ * notedown
+ * pandoc
+
+== Special Update/Build Instructions ==
+
+Fetch tarball from https://pypi.python.org/pypi/rst2ipynb/
+
+As it is written in Haskell, pandoc must be installed from the distro.
+
+The main rationale for having a notedown package in Sage (rather than
+just let pip fetch it) is that the version on pipy (1.5.0, 2015-10-07)
+is outdated and lacks important features / fixes for us.

build/pkgs/rst2ipynb/checksums.ini

@@ -0,0 +1,4 @@
+tarball=rst2ipynb-VERSION.tar.gz
+sha1=660df59d66a052a9337517ed55e018307d3549ce
+md5=8d85aa294c25ccaf3bb080bc6eb50e59
+cksum=1127236178

build/pkgs/rst2ipynb/dependencies

@@ -0,0 +1,5 @@
+$(PYTHON) | setuptools pip notedown
+
+----------
+All lines of this file are ignored except the first.
+It is copied by SAGE_ROOT/build/make/install into SAGE_ROOT/build/make/Makefile.

build/pkgs/rst2ipynb/package-version.txt

@@ -0,0 +1 @@
+0.2.1

build/pkgs/rst2ipynb/spkg-install

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+cd src && $PIP_INSTALL .

build/pkgs/rst2ipynb/type

@@ -0,0 +1 @@
+optional