style: fixed indent to 2 to match the rest

Dockerfile

@@ -9,14 +9,14 @@ RUN chmod +rwx 'kindlegen'
 RUN rm kindlegen.tar.gz
 
 RUN latest_tag=$(curl -s https://api.github.com/repos/ciromattia/kcc/releases/latest | jq -rc ".tag_name") && \
-    curl -L https://github.com/ciromattia/kcc/archive/refs/tags/$latest_tag.tar.gz > kcc.tar.gz && \
-    tar -xzf kcc.tar.gz && \
-    mv kcc-$(echo "$latest_tag" | sed 's/^.\(.*\)/\1/') kcc && \
-    touch kcc/KCC_VERSION && \
-    echo $latest_tag > kcc/KCC_VERSION && \
-    mkdir -p /root-layer/usr/local/bin && \
-    mv kindlegen /root-layer/usr/local/bin/ && \
-    mv kcc /root-layer/usr/local/bin/
+  curl -L https://github.com/ciromattia/kcc/archive/refs/tags/$latest_tag.tar.gz > kcc.tar.gz && \
+  tar -xzf kcc.tar.gz && \
+  mv kcc-$(echo "$latest_tag" | sed 's/^.\(.*\)/\1/') kcc && \
+  touch kcc/KCC_VERSION && \
+  echo $latest_tag > kcc/KCC_VERSION && \
+  mkdir -p /root-layer/usr/local/bin && \
+  mv kindlegen /root-layer/usr/local/bin/ && \
+  mv kcc /root-layer/usr/local/bin/
 
 COPY root/ /root-layer/
 

root/etc/s6-overlay/s6-rc.d/init-mod-calibre-web-kcc-add-package/run

@@ -0,0 +1,54 @@
+#!/usr/bin/with-contenv bash
+
+# This is the init file used for adding os or pip packages to install lists.
+# It takes advantage of the built-in init-mods-package-install init script that comes with the baseimages.
+# If using this, we need to make sure we set this init as a dependency of init-mods-package-install so this one runs first
+
+echo "**** Adding kcc dependencies (repo and pip) to package install lists ****"
+if ! python3 /usr/local/bin/kcc/kcc-c2e.py > /dev/null 2>&1 ; then
+  echo "\
+    PySide6 \
+    Pillow \
+    psutil \
+    requests \
+    python-slugify \
+    raven \
+    mozjpeg-lossless-optimization \
+    natsort[fast] \
+    distro" >> /mod-pip-packages-to-install.list
+  ## Ubuntu
+  if [ -f /usr/bin/apt ]; then
+    echo "\
+      python3 \
+      python3-pip
+      python3-dev \
+      libpng-dev \
+      libjpeg-dev \
+      p7zip-full \
+      p7zip-rar \
+      unrar-free \
+      libgl1 \
+      python3-pyqt5 \
+      cmake" >> /mod-repo-packages-to-install.list
+  fi
+  # Alpine
+  if [ -f /sbin/apk ]; then
+    echo "\
+      cargo \
+      libffi-dev \
+      openssl-dev \
+      python3 \
+      python3-dev \
+      python3 \
+      py3-pip \
+      libpng-dev \
+      libjpeg \
+      p7zip \
+      unrar \
+      mesa-gl \
+      py3-qt5 \
+      cmake" >> /mod-repo-packages-to-install.list
+    fi
+else
+  echo "**** kcc dependencies already installed, skipping ****"
+fi