CODEWITHSUNDEEP
tmuxtmuxinator
zayquan
zayquan

Reputation: 8052

Using tmuxinator to open a dynamic number of windows

I would like to set up a tmuxinator project to open a dynamic number of tmux windows. In my scenario I would like one window per instance in an AWS Auto Scale Group.

I have a bash function to list the private IP of each server I want to attach to. For example:

$ prod-ips
10.X.X.1
10.X.X.2
10.X.X.3
10.X.X.4

I have a bash function to tunnel to any of those IPs:

$tunnel_to 10.X.X.1
....
works
[email protected] ~ $

How do I pass the IP list returned from prod-ips into a tmuxinator project so that it will open 1 window for each line of output ?

Thanks!

Upvotes: 1

Views: 582

Answers (2)

zayquan
zayquan

Reputation: 8052

Thanks @pdoherty926, the ERB syntax is what I was looking for.

Looks like functions defined in my bash_profile will not work, but if I write those functions out in the tmuxinator conf then it all works:

This works (the echo is the output of prod-ips consolidated into a single line):

windows:
  <%- `echo 10.250.XX.X1,10.250.XX.X2,10.250.XX.X3`.split(',').each do |ip| %>
    - ip-<%= ip.chomp %>: tunnel_to <%= ip %>
  <%- end %>

But this command does not work:

windows:
  <%- `prod-ips`.split("\n").each do |ip| %>
    - ip-<%= ip.chomp %>: tunnel_to <%= ip %>
  <%- end %>

But if I defined prod-ips long hand in the file the tmuxinator start command works:

windows:  
  <%- `aws ec2 describe-instances | jq '.Reservations[].Instances[] | select(has("SecurityGroups")) | select(.SecurityGroups | length > 0) | select(.SecurityGroups[0].GroupName | test("<SECURITYGROUPFILTER>")) | .PrivateIpAddress' | sed -e 's/"//g'`.split("\n").each do |ip| %>    
    - ip-<%= ip.chomp %>: tunnel_to <%= ip %>
  <%- end %>

Upvotes: 0

pdoherty926
pdoherty926

Reputation: 10349

Since project files are first processed as ERB, you could do something like the following:

# ~/.tmuxinator/dyn.yml

name: dyn
root: ~/
windows:
  # just using `echo` as a POC; this is where you'd make your function call
  <%- `echo "111,222,333"`.split(',').each do |ip| %>
  - tunnel-to-<%= ip.chomp %>: echo tunnel_to <%= ip %>
  <%- end %>

Upvotes: 1

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