Docker: Reduce image layers and improve build scripts

scripts/dist/install-tensorflow.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+
+set -e
+
+TF_VERSION="1.15.2"
+
+DESTDIR=$(realpath "${1:-/usr}")
+
+echo "Installing TensorFlow in \"$DESTDIR\"..."
+
+# abort if the user is not root
+if [[ $(id -u) != "0" ]] && [[ $DESTDIR == "/usr" || $DESTDIR == "/usr/local" ]]; then
+  echo "Error: Run install-tensorflow.sh as root to install in a system directory!" 1>&2
+  exit 1
+fi
+
+mkdir -p "$DESTDIR"
+
+SYSTEM_ARCH=$("$(dirname "$0")/arch.sh")
+INSTALL_ARCH=${2:-$SYSTEM_ARCH}
+TMPDIR=${TMPDIR:-/tmp}
+
+if [[ -z $3 ]]; then
+  INSTALL_FILE="${INSTALL_ARCH}/libtensorflow-${INSTALL_ARCH}-${TF_VERSION}.tar.gz"
+else
+  INSTALL_FILE="${INSTALL_ARCH}/libtensorflow-${INSTALL_ARCH}-${2}-${TF_VERSION}.tar.gz"
+fi
+
+if [ ! -f "$TMPDIR/$INSTALL_FILE" ]; then
+  URL="https://dl.photoprism.app/tensorflow/${INSTALL_FILE}"
+  echo "Downloading $INSTALL_ARCH libs from \"$URL\". Please wait."
+  curl --create-dirs -fsSL -o "$TMPDIR/$INSTALL_FILE" "$URL"
+fi
+
+echo "Extracting \"$TMPDIR/$INSTALL_FILE\" to \"$DESTDIR\"..."
+
+if [ -f "$TMPDIR/$INSTALL_FILE" ]; then
+  tar --overwrite --mode=755 -C "$DESTDIR" -xzf "$TMPDIR/$INSTALL_FILE"
+else
+  echo "Fatal: \"$TMPDI/$INSTALL_FILE\" not found"
+  exit 1
+fi
+
+if [[ $DESTDIR == "/usr" || $DESTDIR == "/usr/local" ]]; then
+  echo "Running ldconfig..."
+  ldconfig
+else
+  echo "Running \"ldconfig -n $DESTDIR/lib\"."
+  ldconfig -n "$DESTDIR/lib"
+fi
+
+echo "Done."