conftmpl.sh

conftmpl.sh

#!/bin/bash

FILENAME=$1

for config in */config; do
  DIR=$(dirname $config)
  cp $FILENAME.tmpl $DIR/$FILENAME.env

  VARS=$(sed "s/\n/ /g" $config)
  env $VARS /home/ubuntu/envconf/envconf $DIR/$FILENAME
done

Example

$ find                
.
./user_data.tmpl
./coreos2
./coreos2/config
./coreos1
./coreos1/config
$ cat user_data.tmpl 
Test $TEST for you!
$ cat coreos1/config
TEST=1
$ cat coreos2/config
TEST=2
$ ~/conftmpl user_data
$ find              
.
./user_data.tmpl
./coreos2
./coreos2/config
./coreos2/user_data
./coreos1
./coreos1/config
./coreos1/user_data
$ cat coreos1/user_data
Test 1 for you!
$ cat coreos2/user_data
Test 2 for you!