Better sed manipulation in all demo scripts

run-k8s-istio-demo.sh

@@ -35,8 +35,8 @@ DEMO_PROMPT="${GREEN}➜ ${CYAN}$ "
 # hide the evidence
 clear
 
-sed -n '/^```bash$/,/^```$/p;/^-----$/p' README.md | \
-sed -n '/^\[ -f \$PWD\/kubeconfig.conf \] && export KUBECONFIG=/,$p' | sed '1s/^/```bash\n/' | \
+sed -n '/^## Install Istio$/,$p' README.md | \
+sed -n '/^```bash$/,/^```$/p;/^-----$/p' | \
 sed -e 's/^-----$/\
 p  ""\
 p  "################################################################################################### Press <ENTER> to continue"\

run-k8s-istio-openstack-full-demo.sh

@@ -41,8 +41,8 @@ clear
 # git clone https://github.com/ruzickap/k8s-istio-demo && cd k8s-istio-demo
 # ./run-k8s-istio-openstack-full-demo.sh
 
-sed -n '/^```bash$/,/^```$/p;/^-----$/p' README.md | \
-sed -n '/^apt update -qq$/,$p' | sed '1s/^/```bash\n/' | \
+sed -n '/^Install necessary software into the Docker container:$/,$p' README.md | \
+sed -n '/^```bash$/,/^```$/p;/^-----$/p' | \
 sed -e 's/^-----$/\
 p  ""\
 p  "################################################################################################### Press <ENTER> to continue"\

run-k8s-istio-openstack-rook-elasticsearch-demo.sh

@@ -1,6 +1,8 @@
 #!/bin/bash -eux
 
-sed -n '/^```bash$/,/^```$/p' README.md | sed '/^```*/d' | sed -n '/^terraform init -var-file=terrafrom/,/^kubectl get -l app=fluent-bit svc,pods --all-namespaces -o wide$/p' > README.sh
+sed -n '/^Download Terraform components:$/,/^## Istio architecture and features$/p' README.md | \
+sed -n '/^```bash$/,/^```$/p' | \
+sed '/^```*/d' > README.sh
 
 source README.sh