org: update the architecture diagram

For #254.

* doc/org/arch.tex: Include libspotgen and its python bindings,
genaut, and also the buddy bindings.
* doc/org/concepts.org: Adjust the description.

doc/org/arch.tex

@@ -10,18 +10,15 @@
 \begin{document}
 
 \begin{tikzpicture}
-  \tikzset{cppbox/.style={minimum width=#1,fill=orange!30, minimum height=1.5cm},
+  \tikzset{node distance=2mm,
-           pybox/.style={minimum width=#1,fill=cyan!30, minimum height=1cm},
+           basicbox/.style={minimum width=#1,minimum height=8mm},
-           shbox/.style={minimum width=#1,fill=red!30, minimum height=8mm},
+           double height/.style={minimum height=18mm},
+           cppbox/.style={basicbox=#1,fill=orange!30},
+           pybox/.style={basicbox=#1,fill=cyan!30},
+           shbox/.style={basicbox=#1,fill=red!30},
            usedby/.style={->,ultra thick,>={Stealth[length=5mm,round]},gray!50!black}}
-  \node[cppbox=7.3cm] (libspot) {\texttt{libspot\strut}};
+  \node[cppbox=14.12cm] (libspot) {\texttt{libspot\strut}};
-  \node[cppbox=4.3cm,right=2mm]
+  \node[shbox=3cm,above right=2mm and 0mm of libspot.north west,align=center] (shcmd) {
-     (libltsmin) at (libspot.east) {\texttt{libspot-ltsmin\strut}};
-  \node[cppbox=8cm,below right,yshift=-2mm,minimum height=8mm] (buddy) at (libspot.south west) {\texttt{libbddx\strut}};
-
-  \node[pybox=4.3cm,above=2mm] (pyltsmin) at (libltsmin.north) {\texttt{import spot.ltsmin\strut}};
-  \node[pybox=3cm,left=2mm] (pyspot) at (pyltsmin.west) {\texttt{import spot\strut}};
-  \node[shbox=4.1cm,above left,xshift=-2mm,align=center] (shcmd) at (pyspot.south west) {
     \texttt{randltl}\\
     \texttt{genltl}\\
     \texttt{ltlfilt}\\
@@ -34,30 +31,51 @@
     \texttt{ltlgrind}\\
     \texttt{ltldo}
   };
-  \node[shbox=1.9cm,below left,yshift=-2mm] (divine) at (libltsmin.south east) {\texttt{divine\strut}};
+  \node[cppbox=4.7cm,above right=0mm and 2mm of shcmd.south east] (libgen) {\texttt{libspotgen\strut}};
-  \node[shbox=1.5cm,left,xshift=-2mm] (spins) at (divine.west) {\texttt{SpinS\strut}};
+  \node[cppbox=2.5cm,above right=0mm and 2mm of libgen.south east] (buddy) {\texttt{libbddx\strut}};
-  \node[pybox=7.5cm,above right,yshift=2mm] (ipython) at (pyspot.north west) {IPython / Jupyter};
+  \node[pybox=2.5cm,above right=0mm and 2mm of buddy.south east,double height] (pyspot) {\texttt{import spot}};
+  \node[cppbox=4cm,above right=0mm and 2mm of pyspot.south east] (libltsmin) {\texttt{libspotltsmin\strut}};
+
+  \node[shbox=1.5cm,above right=2mm and 0mm of libgen.north west,align=center] (genaut) {\texttt{genaut}};
+
+  \node[pybox=3cm,above left=2mm and 0mm of libgen.north east] (pygen) {\texttt{import spot.gen\strut}};
+  \node[pybox=2.5cm,above=of buddy] (pybuddy) {\texttt{import bdd\strut}};
+
+  \node[pybox=4cm,above=2mm] (pyltsmin) at (libltsmin.north) {\texttt{import spot.ltsmin\strut}};
+  \node[shbox=1.5cm,right=of libspot] (spins) {\texttt{SpinS\strut}};
+  \node[shbox=1.5cm,right=of spins] (divine) {\texttt{divine\strut}};
+
+  \node[pybox=12.65cm,above right=2mm and 0mm of pygen.north west] (ipython) {\texttt{python} / \texttt{ipython} / \texttt{jupyter}};
+
   \draw[usedby] (buddy.north) -- ++(0,3mm);
-  \draw[usedby] (buddy.north) ++(3.7cm,0) -- ++(0,3mm);
+  \draw[usedby] (buddy.south) -- ++(0,-3mm);
+  \draw[usedby] (pybuddy.north) -- ++(0,3mm);
   \draw[usedby] (spins.north) -- ++(0,3mm);
   \draw[usedby] (divine.north) -- ++(0,3mm);
-  \draw[usedby] (libspot.east) -- ++(3mm,0);
+  \draw[usedby] (libgen.south |- libspot.north) -- ++(0,3mm);
+  \draw[usedby] (genaut.south |- libgen.north) -- ++(0,3mm);
+  \draw[usedby] (pygen.south |- libgen.north) -- ++(0,3mm);
+  \draw[usedby] (pygen.north) -- ++(0,3mm);
   \draw[usedby] (pyspot.south) ++(0,-2mm) -- ++(0,3mm);
   \draw[usedby] (pyltsmin.south) ++(0,-2mm) -- ++(0,3mm);
   \draw[usedby] (shcmd.south) ++(0,-2mm) -- ++(0,3mm);
   \draw[usedby] (pyspot.north) -- ++(0,3mm);
   \draw[usedby] (pyltsmin.north) -- ++(0,3mm);
+  \coordinate (x) at ($(libltsmin.south west)!.5!(libspot.north east)$);
+  \draw[usedby] (libspot.north -| x) -- ++(0,3mm);
 
 \begin{pgfonlayer}{background}
 \path[fill=gray!15,draw=gray,rounded corners=1mm]
 ($(shcmd.north west)+(-1mm,1mm)$) --
 ($(shcmd.north east)+(1mm,1mm)$) --
-  ($(pyspot.north west)+(-1mm,1mm)$) --
+($(genaut.north west)+(-1mm,1mm)$) --
+($(genaut.north east)+(1mm,1mm)$) --
+($(pygen.north west)+(-1mm,1mm)$) --
 ($(pyltsmin.north east)+(1mm,1mm)$) --
 ($(libltsmin.south east)+(1mm,-1mm)$) --
-  ($(buddy.north east)+(1mm,1mm)$) --
+($(libspot.north east)+(1mm,1mm)$) --
-  ($(buddy.south east)+(1mm,-1mm)$) --
+($(libspot.south east)+(1mm,-1mm)$) --
-  ($(buddy.south west)+(-1mm,-1mm)$) -- cycle;
+($(libspot.south west)+(-1mm,-1mm)$) -- cycle;
 \end{pgfonlayer}
 \end{tikzpicture}
 \end{document}

doc/org/concepts.org

@@ -1017,24 +1017,30 @@ from the command-line, Python, or C++.
 
 The Spot project can be broken down into several parts, as shown
 above.  Orange boxes are C/C++ libraries.  Red boxes are command-line
-program.  Blue boxes are Python-related.
+programs.  Blue boxes are Python-related.  The gray outline shows the
+components that are distributed and installed by Spot.
 
   - =libbddx= is a customized version of [[https://sourceforge.net/projects/buddy/][the BuDDy library]], for
     manipulating [[#bdd][BDDs]].
   - =libspot= is the main library, containing a C++11 implementation of all the
     data structures and algorithms.  This depends on =libddx=.
-  - all the supplied [[file:tools.org][command-line tools]] are built upon the =libspot=
+  - =libspotgen= is an auxiliary library that contains functions to
-    library, exporting some of its features to shell users
+    generate families of automata, useful for benchmarking and testing
-  - =libspot-ltsmin= is a library that helps interfacing Spot with
+  - all the supplied [[file:tools.org][command-line tools]] distributed with Spot are
+    built upon the =libspot= or =libspotgen= libraries
+  - =libspotltsmin= is a library that helps interfacing Spot with
     dynamic libraries that [[http://fmt.cs.utwente.nl/tools/ltsmin/][LTSmin]] uses to represent state-spaces.  It
     currently supports libraries generated from promela models using
     SpinS or a patched version of DiVinE, but you have to install
     those third-party tools first.  See [[https://gitlab.lrde.epita.fr/spot/spot/blob/next/tests/ltsmin/README][=tests/ltsmin/README=]]
     for details.
   - In addition to the C++11 API, we also provide Python bindings for
-    =libspot-ltsmin= and most of =libspot=.  These are available by
+    =libspotgen=, =libspotltsmin=, =libbddx=, and most of =libspot=.
-    importing =spot= or =spot.ltsmin=, and have readily usable in an
+    These are available by importing =spot.gen=, =spot.ltsmin=, =bdd=,
-    interactive environment such as the [[http://juptter.org][IPython/Jupyter]] notebook.
+    and =spot=.  Those Python bindings also includes some additional
+    code to make them more usable in interactive environments such as
+    the [[http://juptter.org][IPython/Jupyter]] notebook.
+
 * Automaton property flags
    :PROPERTIES:
    :CUSTOM_ID: property-flags