Fixes #143 (#144)

* Fixes #143

Downloads go source into a temporary location, outside of the cloned project source repository. This keeps the cloned repository clean by reporting no new files or changes in `git status`.

* Remove extra newlines

Remove "extra" new lines

Author: rustydb

setup-go.sh

@@ -1,4 +1,6 @@
 #!/bin/bash -eux
+TEMP="$(mktemp -d)"
+trap 'rm -rf $TEMP' EXIT ERR INT
 
 ARCH=$(dpkg --print-architecture)
 GO_LINUX_PACKAGE_URL="https://go.dev/dl/$(curl https://go.dev/VERSION?m=text | head -n1).linux-${ARCH}.tar.gz"
@@ -25,13 +27,14 @@ elif [[ -n ${INPUT_GOVERSION} ]]; then
     GO_LINUX_PACKAGE_URL="https://go.dev/dl/go${INPUT_GOVERSION}.linux-${ARCH}.tar.gz"
 fi
 
-wget --progress=dot:mega ${GO_LINUX_PACKAGE_URL} -O go-linux.tar.gz 
-tar -zxf go-linux.tar.gz
-mv go /usr/local/
+wget --progress=dot:mega ${GO_LINUX_PACKAGE_URL} -O "$TEMP/go-linux.tar.gz"
+(
+    cd "$TEMP" || exit 1
+    tar -zxf go-linux.tar.gz
+    mv go /usr/local/
+)
 mkdir -p /go/bin /go/src /go/pkg
 
 export GO_HOME=/usr/local/go
 export GOPATH=/go
 export PATH=${GOPATH}/bin:${GO_HOME}/bin/:$PATH
-
-