insert build script

.gitignore

@@ -1 +1,3 @@
 openwrt-imagebuilder*
+bin/
+sha256sum*

build.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+fprintUrl="https://openwrt.org/docs/guide-user/security/signatures"
+dlUrl="https://downloads.openwrt.org/snapshots/targets/ramips/mt7620"
+folderName="openwrt-imagebuilder-ramips-mt7620.Linux-x86_64"
+sumsFile="sha256sums"
+ascFile="$sumsFile.asc"
+outDir="bin"
+
+sudo pacman -q -S --needed base-devel ncurses zlib gawk git gettext openssl libxslt wget unzip python gnupg
+
+rm $sumsFile*
+wget -q "$dlUrl/$sumsFile"
+wget -q "$dlUrl/$ascFile"
+
+gpgOutput=$(gpg --status-fd 1 --auto-key-retrieve --with-fingerprint --verify "$ascFile") 
+
+if [ $? -eq 0 ]; then
+	echo "SIGNATURE VERIFIED"
+else
+	exit 1
+fi
+
+fprint=$(echo "$gpgOutput" | grep -m1 "KEY_CONSIDERED" | cut -d' ' -f3)
+fprintFmt=$(echo "$fprint" | sed 's/.\{4\}/& /g' | xargs | sed 's/.\{25\}/& /g')
+
+curl -s "$fprintUrl" | grep -o "$fprintFmt"
+
+if [ $? -eq 0 ]; then
+	echo "FINGERPRINT VERIFIED"
+else
+	exit 1
+fi
+
+sha256sum --ignore-missing -c "$sumsFile" 
+
+if [ $? -eq 0 ]; then
+	echo "SHA256SUM VERIFIED, no need to redownload"
+else
+	rm -rf $folderName*
+	archive="$folderName.tar.xz"
+	wget "$dlUrl/$archive"
+	tar xJf "$archive"
+fi
+
+mkdir -p "$outDir"
+cd "$folderName"
+ln -s ../files .
+make image PROFILE=tplink_archer-mr200 PACKAGES="curl" FILES=files/
+cp ./bin/targets/ramips/mt7620/openwrt-ramips-mt7620-tplink_archer-mr200-squashfs-sysupgrade.bin "../$outDir/ArcherC2V1_tp_recovery.bin"
+
+
+
+