Revert "Merge pull request 'Rewrite easyscan in haskell' (#31) from easyscan2 into trunk"

This reverts commit b3fb8aff73, reversing
changes made to a7aa536cf6.

nix/packages/by-name/easyscan/easyscan.sh

@@ -0,0 +1,61 @@
+# This is here because scanimage's batch mode is broken for my scanner
+
+OUTPUT_FILE="${1:-./scan_"$(date)".pdf}"
+
+if [ -e "$OUTPUT_FILE" ]; then
+	echo "$OUTPUT_FILE" already exists, you are probably making a mistake!
+	exit 1
+fi
+
+tempdir="$(mktemp -d)"
+filenames=()
+counter=1
+
+function clean() {
+	# Make sure I don't remove things other than pdf
+	rm "$tempdir/"*.pdf
+	rm -d "$tempdir"
+}
+trap clean EXIT
+
+while :; do
+	ok="true"
+	echo "Scanning page $counter"
+
+	CUR_FNAME="$tempdir/easyscan_$counter.pdf"
+
+	# If no size is set, the output will be wonky-sized
+	# 210,297 is the size of A4
+	scanimage -x 210 -y 297 --resolution 300 -o "$CUR_FNAME" >/dev/null 2>&1 ||
+		{
+			echo "Failed to scan page..."
+			ok="false"
+		}
+
+	if $ok; then
+		counter=$((counter += 1))
+		filenames+=("$CUR_FNAME")
+	fi
+
+	IFS= read -r -p "Continue scanning? [Y/n] " cont
+	case "$cont" in
+	[nN])
+		echo "Exiting..."
+		break
+		;;
+	[yY] | *) ;;
+	esac
+done
+
+# Multiple files are scanned, join them
+#
+# Note: do NOT use the * glob, because bash orders lexicographically and not
+# numerically, the merged ordering will be wrong.
+merged_filename="$tempdir/easyscan_final.pdf"
+pdfunite "${filenames[@]}" "$merged_filename"
+
+# Copy scan to current directory
+mkdir -p "$(dirname "$OUTPUT_FILE")"
+cp "$merged_filename" "$OUTPUT_FILE"
+
+clean