Add merge_images

.gitlab-ci.yml

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+image: docker:stable
+
+services:
+  - docker:stable-dind
+
+variables:
+  DOCKER_DRIVER: overlay2
+
+stages:
+  - build
+  - push
+
+before_script:
+  - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
+
+Build:
+  script:
+    - docker build --pull -t $CI_REGISTRY_IMAGE:tmp .
+    - docker push $CI_REGISTRY_IMAGE:tmp
+  stage: build
+  tags:
+  - docker
+
+Push latest:
+  only:
+    - master
+  script:
+    - docker pull $CI_REGISTRY_IMAGE:tmp
+    - docker tag $CI_REGISTRY_IMAGE:tmp $CI_REGISTRY_IMAGE:latest
+    - docker push $CI_REGISTRY_IMAGE:latest
+  stage: push
+  tags:
+  - docker
+
+Push tag:
+  only:
+    - tags
+  script:
+    - docker pull $CI_REGISTRY_IMAGE:tmp
+    - docker tag $CI_REGISTRY_IMAGE:tmp $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
+    - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
+  stage: push
+  tags:
+  - docker

Dockerfile

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+FROM debian:9-slim
+
+
+# Define image metadata
+LABEL maintainer="inf_sfb1288@lists.uni-bielefeld.de"
+
+
+ENV LANG=C.UTF-8
+
+
+# Install prerequisites
+RUN apt-get update \
+ && apt-get install -y --no-install-recommends \
+      imagemagick \
+      python3.5 \
+ && rm -rf /var/lib/apt/lists/*
+
+
+# Install merge_images
+COPY merge_images /usr/local/bin
+
+ENTRYPOINT ["merge_images"]
+CMD ["--help"]

merge_images

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+#!/usr/bin/env python3.5
+# coding=utf-8
+
+
+"""
+merge_images
+
+Usage:  For usage instructions run with option --help
+Author: Stephan Porada <sporada@uni-bielefeld.de>
+
+"""
+
+import os
+import argparse
+
+
+def parse_arguments():
+    parser = argparse.ArgumentParser(description='Merges given input images '
+                                                 'into one multipage tiff.')
+    parser.add_argument('-i', dest='input_dir', required=True)
+    parser.add_argument('-o', dest='output_dir', required=True)
+    return parser.parse_args()
+
+
+def merge_images(input_dir, output_dir):
+    os.system('mkdir {}'.format(output_dir))
+    os.system('ls -v {}/*.* >> file_list.txt'.format(input_dir))
+    os.system('convert @file_list.txt {}/combined.tiff'.format(output_dir))
+    os.system('cat "file_list.txt" | xargs rm')
+    os.system('rm file_list.txt')
+
+
+def main():
+    args = parse_arguments()
+    merge_images(args.input_dir, args.output_dir)
+
+
+if __name__ == '__main__':
+    main()