Update for unprivileged usage.

Dockerfile

@@ -56,4 +56,7 @@ RUN echo "deb https://notesalexp.org/tesseract-ocr/stretch/ stretch main" >> /et
 COPY hocrtotei /usr/local/bin
 COPY ocr /usr/local/bin
 
+mkdir /input /output
+chmod a+rw /input /output
+
 ENTRYPOINT ["ocr"]

README.md

@@ -42,12 +42,12 @@ mkdir -p /<mydatalocation>/files_for_ocr /<mydatalocation>/files_from_ocr
 docker run \
     --rm \
     -it \
-    -v /<mydatalocation>/files_for_ocr:/files_for_ocr \
-    -v /<mydatalocation>/files_from_ocr:/files_from_ocr \
+    -v /<mydatalocation>/files_for_ocr:/input \
+    -v /<mydatalocation>/files_from_ocr:/output \
     sfb1288inf/ocr:latest \
-        -i /files_for_ocr \
-        -o /files_from_ocr \
-        -l <languagecode>
+        -i /input \
+        -l <languagecode> \
+        -o /output
 ```
 The arguments below `sfb1288inf/ocr:latest` are described in the [OCR arguments](#ocr-arguments) part.
 
@@ -57,14 +57,6 @@ If you want to use the prebuilt image, replace `sfb1288inf/ocr:latest` with `git
 
 ### OCR arguments
 
-`-i path`
-* Sets the input directory using the specified path.
-* required = True
-
-`-o path`
-* Sets the output directory using the specified path.
-* required = True
-
 `-l languagecode`
 * Tells tesseract which language will be used.
 * options = deu (German), deu_frak (German Fraktur), eng (English), enm (Middle englisch), fra (French), frm (Middle french), ita (Italian), por (Portuguese), spa (Spanish)
@@ -90,12 +82,12 @@ Example with all arguments used:
 docker run \
     --rm \
     -it \
-    -v $HOME/ocr/files_for_ocr:/files_for_ocr \
-    -v $HOME/ocr/files_from_ocr:/files_from_ocr \
+    -v "$HOME"/ocr/files_for_ocr:/input \
+    -v "$HOME"/ocr/files_from_ocr:/output \
     sfb1288inf/ocr:latest \
-        -i /files_for_ocr \
-        -o /files_from_ocr \
+        -i /input \
         -l eng \
+        -o /output \
         --keep_intermediates \
         --nCores 8 \
         --skip-binarisation

wrapper/ocr

@@ -17,15 +17,16 @@ parser.add_argument(
     dest='output_dir',
     required=False
 )
-args, ocr_args = parser.parse_known_args()
+dirs, args = parser.parse_known_args()
 
-if args.input_dir == None or args.output_dir == None:
-    if args.input_dir != None:
-        ocr_args.append('-i')
-        ocr_args.append('/files_for_ocr')
-    if args.output_dir != None:
-        ocr_args.append('-o')
-        ocr_args.append('/files_from_ocr')
-    subprocess.run(['docker', 'run', '--rm', '-it', container_image] + ocr_args)
-else:
-    subprocess.run(['docker', 'run', '--rm', '-it', '-v', args.input_dir + ':/files_for_ocr', '-v', args.output_dir + ':/files_from_ocr', container_image, '-i', '/files_for_ocr', '-o', '/files_from_ocr'] + ocr_args)
+cmd = ['docker', 'run', '--rm', '-it']
+if dirs.input_dir is not None:
+    cmd += ['-v', dirs.input_dir + ':/input']
+    args += ['-i', '/input']
+if dirs.output_dir is not None:
+    cmd += ['-v', dirs.output_dir + ':/output']
+    args += ['-o', '/output']
+cmd.append(container_image)
+cmd += args
+
+subprocess.run(cmd)