test if pdftk binary exists before using it

Closes #5650

calebasse/pdftk.py

@@ -1,16 +1,13 @@
 import os
 import subprocess
-import tempfile
+
+from calebasse import settings
 
 class PdfTk(object):
-    def __init__(self, pdftk_path=None, prefix='tmp'):
-        self._pdftk_path = pdftk_path
+    def __init__(self, prefix='tmp'):
+        self.pdftk_path = settings.PDFTK_PATH
         self.prefix = prefix
 
-    @property
-    def pdftk_path(self):
-        return self._pdftk_path or '/usr/bin/pdftk'
-
     def do(self, args, wait=True):
         args = [self.pdftk_path] + args
         proc = subprocess.Popen(args)

calebasse/settings.py

@@ -3,6 +3,7 @@
 # Django settings for calebasse project.
 
 import os
+from django.core.exceptions import ImproperlyConfigured
 from logging.handlers import SysLogHandler
 
 PROJECT_PATH = os.path.join(os.path.dirname(os.path.dirname(__file__)), 'calebasse')
@@ -305,6 +306,9 @@ SERVICE_SETTINGS = {}
 # - age_format: string, string (default: None, alternative behaviour to have
 #   age always displayed in months: "months_only")
 
+# Pdftk binary path (pdftk is used to complete CERFA)
+PDFTK_PATH = '/usr/bin/pdftk'
+
 
 #CSV_ENCODING = 'cp1252' #For windows : windows-1252/Winlatin1
 #CSVPROFILE = {\
@@ -353,6 +357,9 @@ except ImportError:
     import sys
     sys.exit(1)
 
+if not os.path.exists(PDFTK_PATH):
+    raise ImproperlyConfigured("pdftk %r binary not found" % PDFTK_PATH)
+
 if RAVEN_CONFIG:
     INSTALLED_APPS += ('raven.contrib.django.raven_compat', )
     LOGGING['handlers']['sentry'] = {

requirements.txt

@@ -19,5 +19,6 @@ raven >= 3.5.2, < 3.6
 M2Crypto
 --allow-external pycairo
 django_select2 < 4.3
-#PyGTK doesn't work with pip
 django-journal
+#PyGTK doesn't work with pip
+#pdftk we need the binary