Relax PyYAML version requirement

docs/deployment-prerequisites.md

@@ -33,6 +33,25 @@ The simplest is to subscribe your email address to the topic so that you get an
 You could also use it to trigger a CloudWatch alarm that could be used to trigger a lambda to do automatic
 remediation or create a support ticket.
 
+## Make sure using at least python version 3.7
+
+This application requires at least python version 3.7.
+
+Many distributions use older versions of python by default such as python 3.6.8 in RHEL 8 and Rocky Linux 8.
+Newer versions are available, but can't be made the system default without breaking OS tools such as yum.
+The easiest way to get around this is to create a python virtual environment using a newer version of python.
+Simply install the newer version and then use it to create and activate a virtual environment.
+
+```
+$ python3 --version
+Python 3.6.8
+$ yum -y install python3.11
+$ python3.11 -m venv ~/.venv-python3.11
+$ source ~/.venv-python3.11/bin/activate
+$ python3 --version
+Python 3.11.5
+```
+
 ## Make sure required packages are installed
 
 ```

setup.sh

@@ -8,9 +8,6 @@ repodir=$scriptdir
 
 pushd $repodir
 
-# Deactivate any active virtual envs
-deactivate &> /dev/null || true
-
 if ! yum list installed make &> /dev/null; then
     echo -e "\nInstalling make"
     if ! sudo yum -y install make; then
@@ -29,7 +26,7 @@ if ! python3 --version &> /dev/null; then
     echo -e "\nInstalling python3"
     if ! sudo yum -y install python3; then
         echo -e "\nerror: Couldn't find python3 in the path or install it. This is required."
-        exit 1
+        return 1
     fi
 fi
 
@@ -39,14 +36,14 @@ python_major_version=$(echo $python_version | cut -d '.' -f 1)
 python_minor_version=$(echo $python_version | cut -d '.' -f 2)
 if [[ $python_minor_version -lt 7 ]]; then
     echo "error: CDK requires python 3.7 or later. You have $python_version. Update your python3 version."
-    exit 1
+    return 1
 fi
 echo "Using python $python_version"
 
 # Check nodejs version
 required_nodejs_version=16.20.2
 export JSII_SILENCE_WARNING_DEPRECATED_NODE_VERSION=1
-if ! node -v &> /dev/null; then
+if ! which node &> /dev/null; then
     echo -e "\nnode not found in your path."
     echo "Installing nodejs in your home dir. Hit ctrl-c to abort"
     pushd $HOME
@@ -68,11 +65,11 @@ node_major_version=$(echo $nodejs_version | cut -d '.' -f 1)
 node_minor_version=$(echo $nodejs_version | cut -d '.' -f 2)
 if [[ $node_major_version -lt 14 ]]; then
     echo "error: CDK requires node 14.15.0 or later. You have $nodejs_version. Update your node version."
-    exit 1
+    return 1
 fi
 if [[ $node_major_version -eq 14 ]] && [[ $node_minor_version -lt 6 ]]; then
     echo "error: CDK requires node 14.15.0 or later. You have $nodejs_version. Update your node version."
-    exit 1
+    return 1
 fi
 if [[ $nodejs_version != $required_nodejs_version ]]; then
     echo "Updating nodejs version from $nodejs_version toe $required_nodejs_version"

source/requirements.txt

@@ -10,5 +10,5 @@ pytest
 python-hostlist
 pip
 requests
-PyYAML==5.4.1
+PyYAML>=5.4.1
 schema