Add update script for chitubox

chitubox/update.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+cd -- "$( dirname -- "${BASH_SOURCE[0]}" )"
+
+file="$1"
+if [ -z "$1" ]
+then
+   echo "Usage: $0 FILE"
+   exit 1
+elif [ ! -f "$1" ]
+then
+    echo "File '$1' not found"
+    exit 1
+fi
+
+version=$(grep -oP '\d\.\d\.\d' <<< "$file")
+checksum=$(sha256sum $file | awk '{print $1}')
+
+echo "New version for ${PWD##*/}: version=$version, checksum=$checksum"
+
+sed -i "s|<version>[^<]*</version>|<version>$version</version>|" "${PWD##*/}.nuspec"
+sed -i "/File64/s|[^\\]*$|${file##*/}'|" tools/chocolateyInstall.ps1
+sed -i "/Checksum64/s|=.*|= '$checksum'|" tools/chocolateyInstall.ps1