Dockerfile

# Tesseract
#
# VERSION 3.05.01

FROM alpine:3.7

ARG VCS_REF
ARG BUILD_DATE

LABEL maintainer="James Brink, brink.james@gmail.com" \
  decription="Tesseract OCR" \
  version="3.05.01" \
  org.label-schema.name="Tesseract OCR" \
  org.label-schema.build-date=$BUILD_DATE \
  org.label-schema.vcs-ref=$VCS_REF \
  org.label-schema.vcs-url="https://github.com/jamesbrink/docker-tesseract" \
  org.label-schema.schema-version="1.0.0-rc1"

# Create our tesseract user
RUN addgroup -g 1000 -S tesseract \
      && adduser -u 1000 -S -h /tesseract -s /bin/sh -G tesseract tesseract

# Install all needed runtime dependencies.
RUN set -xe; \
      apk add --update --no-cache --virtual .runtime-deps \
          bash \
          cairo \
          giflib \
          icu \
          libjpeg-turbo \
          libpng \
          libwebp-dev \
          openjpeg \
          pango \
          tiff \
          zlib; \
      apk add --no-cache --virtual .build-deps \
          alpine-sdk \
          autoconf \
          automake \
          cairo-dev \
          giflib-dev \
          git \
          icu-dev \
          libjpeg-turbo-dev \
          libpng-dev \
          libtool \
          libwebp-dev \
          openjpeg-dev \
          pango-dev \
          tiff-dev \
          zlib-dev; \
      cd /var/tmp; \
      wget http://www.leptonica.org/source/leptonica-1.75.3.tar.gz; \
      tar xfv leptonica-1.75.3.tar.gz; \
      rm leptonica-1.75.3.tar.gz; \
      cd leptonica-1.75.3; \
      ./configure --prefix=/usr/local/; \
      make; \
      make install; \
      cd /var/tmp; \
      rm -rf leptonica-1.75.3; \
      git clone https://github.com/tesseract-ocr/tesseract.git; \
      cd tesseract; \
      git checkout 3.05.01; \
      ./autogen.sh; \
      ./configure --prefix=/usr/local/; \
      make; \
      make install; \
      cd /var/tmp; \
      rm -rf tesseract; \
      mkdir -p /tesseract/tessdata; \
      cd /tesseract/tessdata/; \
      wget https://github.com/tesseract-ocr/tessdata/raw/3.04.00/eng.traineddata; \
      cd /; \
      chown -R tesseract:tesseract /tesseract; \
      apk del .build-deps;

# Copy our docker assets.
COPY ./docker-entrypoint.sh /usr/local/bin/entrypoint.sh

# Drop down to our unprivileged user account.
USER tesseract

# Set our working directory.
WORKDIR /tesseract

# Set our environment variables.
ENV TESSDATA_PREFIX=/tesseract/tessdata

# Setup the data volume.
VOLUME ["/tesseract/data"]

# Set our entrypoint.
ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]