feat: Add install-release-dat.sh

Used to get the latest .dat file.

install-release-dat.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+V2RAY="/usr/local/lib/v2ray/"
+DOWNLOAD_LINK_GEOIP="https://github.com/v2ray/v2ray-core/releases/latest/download/geoip.dat"
+DOWNLOAD_LINK_GEOSITE="https://github.com/v2ray/v2ray-core/releases/latest/download/dlc.dat"
+
+download_dat() {
+    for DAT in 'geoip' 'geosite'; do
+        curl -L -H 'Cache-Control: no-cache' -o "$V2RAY/$DAT.dat.bak" "$DOWNLOAD_LINK_${DAT^^}" -#
+        if [ "$?" -ne '0' ]; then
+            echo 'error: Download failed! Please check your network or try again.'
+            exit 1
+        fi
+        curl -L -H 'Cache-Control: no-cache' -o "$V2RAY/$DAT.dat.sha256sum.bak" "$DOWNLOAD_LINK_${DAT^^}.sha256sum" -#
+        if [ "$?" -ne '0' ]; then
+            echo 'error: Download failed! Please check your network or try again.'
+            exit 1
+        fi
+        SUM="$(sha256sum $V2RAY/$DAT.dat.bak | sed 's/ .*//')"
+        CHECKSUM="$(sed 's/ .*//' $V2RAY/$DAT.dat.sha256sum.bak)"
+        if [[ "$SUM" != "$CHECKSUM" ]]; then
+            echo 'error: Check failed! Please check your network or try again.'
+            exit 1
+        fi
+    done
+}
+
+rename_bak() {
+    rename '.bak' '' "$V2RAY/$DAT.dat.bak"
+    rm "$V2RAY/$DAT.dat.sha256sum.bak"
+}
+
+main() {
+    download_dat
+    rename_bak
+}
+
+main