component/aspell: create wrapper for dictionnaries

this allow to share aspell component. Users needs to install the part
with dictionnaries, ie. aspell-en-dictionary instead of simply aspell

component/aspell/aspell-create-wrapper.py

+import os
+import textwrap
+import glob
+
+
+def post_make_hook(options, buildout, environment):
+  prefix = options['prefix']
+  dict_dir = options['dict-dir']
+  aspell_bin = os.path.join(
+      buildout['aspell']['location'],
+      'bin',
+      'aspell')
+
+  aspell_bin_wrapper = options['bin-aspell']
+
+  bin_folder = os.path.dirname(aspell_bin_wrapper)
+  if not os.path.isdir(bin_folder):
+    os.mkdir(bin_folder)
+
+  # install a ./bin/aspell set to use the dict from this part
+  with open(aspell_bin_wrapper, 'w') as wrapper:
+    wrapper.write('''#!/bin/sh
+export ASPELL_CONF="dict-dir {dict_dir}"
+exec {aspell_bin} "$@"
+'''.format(**locals()))
+  os.chmod(aspell_bin_wrapper, 0o755)

component/aspell/buildout.cfg

 [buildout]
 parts =
   aspell
-  aspell-en-dictonary
+  aspell-en-dictionary
 
 extends =
   ../ncurses/buildout.cfg
   ../patch/buildout.cfg
   ../perl/buildout.cfg
+  buildout.hash.cfg
+
 
 [aspell-dictionary-common]
+# Macro to install an aspell dictionnary and create an aspell wrapper using
+# this dictionnary.
+# The aspell wrapper is exported as ${:bin-aspell}
+bin-aspell = @@LOCATION@@/bin/aspell
+
 recipe = slapos.recipe.cmmi
-shared = false
+shared = true
 configure-command = ./configure --vars ASPELL=${aspell:location}/bin/aspell PREZIP=${aspell:location}/bin/prezip-bin
+dict-dir = @@LOCATION@@/lib/aspell/
+data-dir = @@LOCATION@@/lib/aspell/
+make-options =
+  dictdir=${:dict-dir}
+  datadir=${:data-dir}
+make-targets = install
+post-make-hook = ${:_profile_base_location_}/${aspell-create-wrapper:filename}#${aspell-create-wrapper:md5sum}:post_make_hook
+
 
 [aspell]
 recipe = slapos.recipe.cmmi
-shared = false
+shared = true
 url = https://ftp.gnu.org/gnu/aspell/aspell-0.60.7.tar.gz
 md5sum = 8ef2252609c511cd2bb26f3a3932ef28
 environment =

component/aspell/buildout.hash.cfg

+[aspell-create-wrapper]
+filename = aspell-create-wrapper.py
+md5sum = 5b7cc325032f8588870fd2c6b8bd1b6d