Inicializando o projeto.

Dockerfile.dockerfile

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+FROM debian:bookworm-slim
+
+ENV DEBIAN_FRONTEND=noninteractive
+ENV CUPS_VERSION=2.4.12
+ENV TZ "America/Sao_Paulo"
+ENV USERNAME admin
+ENV PASSWORD password
+
+# 1) Instala dependências de build + runtime, incluindo CA para HTTPS
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    ca-certificates \
+    git \
+    build-essential autoconf automake libtool pkg-config \
+    libssl-dev libgnutls28-dev \
+    zlib1g zlib1g-dev \
+    libavahi-client-dev \
+    printer-driver-all \
+    printer-driver-cups-pdf \
+    printer-driver-foo2zjs \
+    foomatic-db-compressed-ppds \
+    openprinting-ppds \
+    libreoffice \
+    libreoffice-common \
+    libnss-mdns \
+    hpijs-ppds \
+    file \
+    hp-ppd \
+    hplip \
+    dos2unix \
+    cups cups-client cups-filters cups-browsed \
+    curl avahi-daemon dbus \
+    iputils-ping \
+    vim \
+  && apt-get clean && rm -rf /var/lib/apt/lists/*
+
+RUN cd /opt && \
+    wget https://github.com/OpenPrinting/cups/releases/download/v${CUPS_VERSION}/cups-${CUPS_VERSION}-source.tar.gz && \
+    tar -xzf cups-${CUPS_VERSION}-source.tar.gz && \
+    cd cups-${CUPS_VERSION} && \
+    ./configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var --with-rcdir=/etc/init.d && \
+    make -j$(nproc) && \
+    make install && \
+    cd / && rm -rf /opt/*
+
+RUN sed -i 's/Listen localhost:631/Listen 0.0.0.0:631/' /etc/cups/cupsd.conf && \
+ sed -i 's/Browsing Off/Browsing On/' /etc/cups/cupsd.conf && \
+ sed -i 's/<Location \/>/<Location \/>\n  Allow All/' /etc/cups/cupsd.conf && \
+ sed -i 's/<Location \/admin>/<Location \/admin>\n  Allow All\n  Require user @SYSTEM/' /etc/cups/cupsd.conf && \
+ sed -i 's/<Location \/admin\/conf>/<Location \/admin\/conf>\n  Allow All/' /etc/cups/cupsd.conf && \
+ echo "ServerAlias *" >> /etc/cups/cupsd.conf && \
+ echo "DefaultEncryption Never" >> /etc/cups/cupsd.conf
+
+RUN echo 'application/vnd.openxmlformats-officedocument.wordprocessingml.document docx' >> /etc/cups/raw.types && \
+    echo 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet xlsx' >> /etc/cups/raw.types
+
+RUN echo 'application/vnd.openxmlformats-officedocument.wordprocessingml.document application/pdf 100 doc2pdf' >> /etc/cups/raw.convs && \
+    echo 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet application/pdf 100 doc2pdf' >> /etc/cups/raw.convs
+
+RUN cp -a /etc/cups /etc/cups.default
+
+# 4) Volumes para persistência de config, spool e logs
+VOLUME ["/etc/cups", "/var/spool/cups", "/var/log/cups"]
+
+# 5) Expõe a porta da interface web/admin do CUPS
+EXPOSE 631 5353/udp
+
+COPY doc2pdf.sh /usr/lib/cups/filter/doc2pdf
+RUN dos2unix /usr/lib/cups/filter/doc2pdf \
+    && chmod 755 /usr/lib/cups/filter/doc2pdf
+
+COPY entrypoint.sh /
+RUN chmod +x /entrypoint.sh
+
+CMD ["/entrypoint.sh"]

README.md

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-# cups
+# Cups
 A Simple Docker cups with libreoffice filter to print docx/xlsx

doc2pdf.sh

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+#!/bin/bash
+# /usr/lib/cups/filter/doc2pdf
+set -e
+
+JOB_ID="$1"
+USER="$2"
+TITLE="$3"
+COPIES="$4"
+OPTIONS="$5"
+FILE="$6"
+
+# Função para extrair extensão a partir do document-format (se existir)
+ext_from_options() {
+  echo "$OPTIONS" \
+    | sed -n 's/.*document-format=\([^ ,]*\).*/\1/p' \
+    | awk -F/ '{print $2}' \
+    | sed -e 's/+xml//g' -e 's/xlsx/spreadsheetml.sheet/' \
+            -e 's/wordprocessingml.document/docx/' \
+            -e 's/spreadsheetml.sheet/xlsx/'
+}
+
+# Se o CUPS passou o arquivo via stdin, ou se FILE não termina em .docx/.xlsx
+if [ "$FILE" = "-" ] || ! echo "$FILE" | grep -E '\.(docx|xlsx)$' >/dev/null; then
+  # detecta extensão: primeiro tenta pelas OPTIONS
+  EXT=$(ext_from_options)
+  # se ainda vazio, usa file --mime-type
+  if [ -z "$EXT" ]; then
+    MIME=$(file --mime-type -b "$FILE")
+    case "$MIME" in
+      application/vnd.openxmlformats-officedocument.wordprocessingml.document) EXT=docx ;;
+      application/vnd.openxmlformats-officedocument.spreadsheetml.sheet)        EXT=xlsx ;;
+      *)                                                                       EXT="" ;;
+    esac
+  fi
+
+  if [ -z "$EXT" ]; then
+    echo "Não consegui determinar extensão para conversão (mime: $MIME, options: $OPTIONS)" >&2
+    exit 1
+  fi
+
+  TMPFILE="/tmp/job-${JOB_ID}.$EXT"
+  cat "${FILE:-/dev/stdin}" > "$TMPFILE"
+  FILE="$TMPFILE"
+fi
+
+# Por fim, converte DOCX/XLSX válidos
+case "${FILE##*.}" in
+  docx|xlsx)
+    libreoffice --headless --convert-to pdf:"writer_pdf_Export" \
+      --outdir /tmp "$FILE"
+    PDF="/tmp/$(basename "${FILE%.*}.pdf")"
+    cat "$PDF"
+    ;;
+  *)
+    echo "Formato não suportado: ${FILE##*.}" >&2
+    exit 1
+    ;;
+esac

docker-compose.yaml

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+---
+services:
+  cups:
+    image: grandow/cups:2.4.12-office
+    container_name: cups
+    restart: unless-stopped
+    ulimits:
+        nofile:
+          soft: "65536"
+          hard: "65536"
+    ports:
+        - "631:631"
+    environment:
+        - USERNAME=admin
+        - PASSWORD=cups
+        - TZ="America/Sao_Paulo"
+    volumes:
+        - "/srv/waprint/cups/:/etc/cups/"

entrypoint.sh

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+#!/bin/sh
+if [ $(grep -ci $USERNAME /etc/shadow) -eq 0 ]; then
+    useradd -r -G lpadmin -M $USERNAME
+
+    # add password
+    echo $USERNAME:$PASSWORD | chpasswd
+
+    # add tzdata
+    ln -fs /usr/share/zoneinfo/$TZ /etc/localtime
+    dpkg-reconfigure --frontend noninteractive tzdata
+fi
+
+# restore default cups config in case user does not have any
+if [ ! -f /etc/cups/cupsd.conf ]; then
+    cp -p /etc/cups.default/cupsd.conf    /etc/cups/
+    cp -p /etc/cups.default/printers.conf /etc/cups/
+    #cp -rpn /etc/cups.default/* /etc/cups/
+fi
+
+if [ -d /etc/cups.default/ppd ]; then
+  mkdir -p /etc/cups/ppd
+  cp -rp /etc/cups.default/ppd/* /etc/cups/ppd/
+fi
+
+# Inicia o tail dos logs em background
+tail -F /var/log/cups/access_log /var/log/cups/error_log &
+
+# Inicia o CUPS em foreground
+/usr/sbin/cupsd -f &
+CUPSD_PID=$!
+
+# Espera o CUPS morrer ou o tail encerrar
+wait $CUPSD_PID