Clean up shell code

.shellcheckrc

@@ -0,0 +1,2 @@
+shell=bash
+external-sources=true

download.sh

@@ -1,14 +1,15 @@
 #!/usr/bin/env bash
 
 BASE_FOLDER=$(dirname "$(readlink -f "$0")")"/";
+# shellcheck source=init.sh
 . "${BASE_FOLDER}init.sh";
 
-cd "${download_folder}";
+cd "${download_folder}" || exit;
 curl -s https://api.github.com/repos/go-gitea/gitea/releases/latest |\
 	grep browser_download_url |\
 	cut -d '"' -f 4 |\
 	grep "${arch}$" |\
 	wget -P "${download_folder}" -i -
-cd -;
+cd - || exit;
 
 # __END__

init.sh

@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 CPU_ARCH=""
 # get the architecture
 _cpu_arch=$(uname -m);
@@ -6,7 +8,7 @@ _cpu_arch=$(uname -m);
 # possible add: arm64
 if [ "${_cpu_arch}" = "x86_64" ]; then
 	CPU_ARCH="amd64";
-elif [ "${_cpu_arch}" = "aarch64" ]; then
+elif [ "${_cpu_arch}" = "aarch64" ] || [ "${_cpu_arch}" = "arm64" ]; then
 	CPU_ARCH="arm64";
 else
 	echo "Not supported architecture: ${_cpu_arch}";
@@ -20,4 +22,6 @@ if [ ! -d "${download_folder}" ]; then
 fi;
 target_file="/usr/local/bin/gitea";
 
+export arch target_file;
+
 # __END__

install.sh

@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 
 BASE_FOLDER=$(dirname "$(readlink -f "$0")")"/";
+# shellcheck source=init.sh
 . "${BASE_FOLDER}init.sh";
 
 echo -e "Update gitea to ${1} ... ";