Fix issue #20 - fails on uppercase .PDF

.gitignore

@@ -9,9 +9,15 @@ build/
 dist/
 *.egg-info/
 venv/
+venv-3.4/
+venv-3.5/
 */test/output
 bin/
 include/
 lib/
 pip-selfcheck.json
 pyvenv.cfg
+htmlcov/
+.coverage
+.cache/
+.ipynb_checkpoints/

ocrmypdf/main.py

@@ -341,9 +341,8 @@ def cleanup_working_files(*args):
 
 @transform(
     input=options.input_file,
-    filter=suffix('.pdf'),
-    output='.repaired.pdf',
-    output_dir=work_folder,
+    filter=formatter('(?i)\.pdf'),
+    output=work_folder + '{basename[0]}.repaired.pdf',
     extras=[_log, _pdfinfo, _pdfinfo_lock])
 def repair_pdf(
         input_file,

tests/test_main.py

@@ -328,3 +328,12 @@ def test_missing_docinfo():
         'missing_docinfo.pdf', 'missing_docinfo.pdf', '-l', 'eng', '-c')
     assert p.returncode == ExitCode.ok, err
 
+
+def test_uppercase_extension():
+    shutil.copy(_make_input("skew.pdf"), _make_input("UPPERCASE.PDF"))
+    try:
+        check_ocrmypdf("UPPERCASE.PDF", "UPPERCASE_OUT.PDF")
+    finally:
+        os.unlink(_make_input("UPPERCASE.PDF"))
+
+