Fundraising in PDF.

[librarian.git] / src / librarian / embeds / latex.py

diff --git a/src/librarian/embeds/latex.py b/src/librarian/embeds/latex.py
index 8425d03..4d3f1f0 100644 (file)
--- a/src/librarian/embeds/latex.py
+++ b/src/librarian/embeds/latex.py
@@ -1,6 +1,6 @@
-# -*- coding: utf-8 -*-
-from __future__ import unicode_literals
-
+# This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Wolne Lektury. See NOTICE for more information.
+#
 import os
 import shutil
 from subprocess import call, PIPE
@@ -12,14 +12,16 @@ from . import DataEmbed, create_embed, downgrades_to
 class LaTeX(DataEmbed):
     @downgrades_to('image/png')
     def to_png(self):
-        tmpl = open(get_resource('res/embeds/latex/template.tex'), 'rb').read().decode('utf-8')
+        with open(get_resource('res/embeds/latex/template.tex'), 'rb') as f:
+            tmpl = f.read().decode('utf-8')
         tempdir = mkdtemp('-librarian-embed-latex')
         fpath = os.path.join(tempdir, 'doc.tex')
         with open(fpath, 'wb') as f:
             f.write((tmpl % {'code': self.data}).encode('utf-8'))
-        call(['xelatex', '-interaction=batchmode', '-output-directory', tempdir, fpath], stdout=PIPE, stderr=PIPE)
-        call(['convert', '-density', '150', os.path.join(tempdir, 'doc.pdf'), '-trim',
-             os.path.join(tempdir, 'doc.png')])
+        call(['xelatex', '-interaction=batchmode', '-output-directory',
+              tempdir, fpath], stdout=PIPE, stderr=PIPE)
+        call(['convert', '-density', '150', os.path.join(tempdir, 'doc.pdf'),
+              '-trim', os.path.join(tempdir, 'doc.png')])
         pngdata = open(os.path.join(tempdir, 'doc.png'), 'rb').read()
         shutil.rmtree(tempdir)
         return create_embed('image/png', data=pngdata)