Merges multiple YAML files into a single file, and substitutes environment variables found as {{VARIABLE_NAME}}.
This is a fork by Ondrej Zizka, with upgraded dependencies. Soon to be released (once I get an approval from Sonatype).
Original code from 2013 by Jonathan Cobb. This code is available under the Apache License, version 2: http://www.apache.org/licenses/LICENSE-2.0.html
mvn -Drelease install
Requires Maven build automation tool.
./bin/yaml-merge.sh file1.yaml file2.yaml ... > merged-result.yaml
Files are merged in order, such that files listed later will override files listed earlier.
The merged result is written to stdout. Logs (for info & errors) are written to stderr.
Within the YAML files to be merged, you may include references to environment variables using mustache-style syntax, for example:
callbackUrl: http://www.{{DEPLOY_HOST_NAME}}.example.com:8102/my_callback
Then make sure you've exported the DEPLOY_HOST_NAME environment variable to whatever place you invoke yaml-merge from.