Add exiftool as a component tool for workhorse

scripts/install-exiftool

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+set -xeuo pipefail
+
+mkdir build \
+  && curl -fsSL "$EXIFTOOL_DOWNLOAD_URL" -o exiftool.tar.gz \
+  && echo "$EXIFTOOL_DOWNLOAD_SHA256 exiftool.tar.gz" | sha256sum -c - \
+  && tar -C build -xzf exiftool.tar.gz
+
+cd build/exiftool-$EXIFTOOL_VERSION
+
+# Apply patches
+patchdir="/patches/exiftool/${EXIFTOOL_VERSION}"
+if [[ -d "${patchdir}" ]]; then
+  for i in "${patchdir}"/*.patch; do
+    echo "$i..."
+    patch -p1 -i "$i"
+  done
+else
+  echo "!! Missing exiftools patch"
+  echo "!! Make sure the patch exists for exiftool version ${EXIFTOOL_VERSION} before proceeding."
+  exit 1
+fi
+
+perl Makefile.PL \
+  && make install \
+  && cd ../.. \
+  && rm -rf build \
+  && rm exiftool.tar.gz