added check to prevent golang attempting install if already present

extras/golang.install

@@ -6,6 +6,7 @@ scriptname="${BASH_SOURCE[0]##*/}"
 script_title="${grn}Go${blu}la${red}n${ylw}g${dfl}"
 rundir="${BASH_SOURCE[0]%/*}"
 sys_arch=$(uname -m)
+req_go_ver="1.19"
 
 golang_bashrc="# Golang system path setup
 export PATH=\$PATH:/usr/local/go/bin
@@ -77,6 +78,17 @@ check-deps(){
     fi
 }
 
+check-go(){
+    if [[ -x /usr/bin/go ]] ; then
+        # TODO: Add version checking rather than just whether the binary is executible
+        #inst_go_ver=$(/usr/bin/go version | awl {'print $3'} | cut -c 3-)
+        #if [[ $(vercomp )]]
+        return 0
+    else
+        return 1
+    fi
+}
+
 install-deps(){
     logger echo "Installing packages $sys_packages"
     run "for $_package in $sys_packages ; do sudo apt-get install -y $_package ; done"
@@ -107,6 +119,10 @@ dry-run-report(){
 }
 
 install(){
+    if check-go ; then
+        boxline "golang already installed!"
+        return 0
+    fi
     if ! check-deps ; then
         warn "Some of the utilities needed by this script are missing"
         boxlinelog "Missing utilities:"
@@ -124,22 +140,24 @@ install(){
         esac
     fi
 
-    local _golang_html=$(/usr/bin/curl -ks "https://go.dev/dl/" | grep linux-amd64 | grep 1.19 | head -n 1)
+    local _golang_html=$(/usr/bin/curl -ks "https://go.dev/dl/" | grep $sys_arch | grep $req_go_ver | head -n 1)
     local golang_current=$(strip-html-tags "$_golang_html")
     #golang_current=$(echo "$golang_current" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')
     export tmp_dir=`mktemp -d /tmp/selfextract.XXXXXX`
+    logger boxborder "Pulling golang v$req_go_ver for installation"
     run wget "https://go.dev/dl/${golang_current}" -O $tmp_dir/$golang_current
     run sudo rm -rf /usr/local/go
     run sudo tar -C /usr/local -xzf $tmp_dir/$golang_current
     if [ ! -f $HOME/.bashrc.d/11-golang.bashrc ] ; then
         run echo -e "$codedog_bashrc" >> $HOME/.bashrc.d/11-golang.bashrc && \
-            boxborder ".bashrc.d/11-golang.bashrc installed..."
+            logger boxborder ".bashrc.d/11-golang.bashrc installed..."
     fi
     export PATH=$PATH:/usr/local/go/bin
-    if [ ! -f /usr/bin/go ] ; then
+    if [ ! -x /usr/bin/go ] ; then
         run sudo ln -s /usr/local/go/bin/go /usr/bin/go && \
-            boxborder "golang symlink created at /usr/bin/go"
+            logger boxborder "golang symlink created at /usr/bin/go"
     fi
+    return 0
 }
 
 # Function for displaying the usage of this script