Having worked on migrations of a Sling derivate Ruben & I ran into issues where the /etc/map would map to production instead of testing environment.
Many big customer have extensive /etc/maps and also many different environments like dev, qa, staging, prod etc.
It would be great to have a tool where for example items like the host name or external links in /etc/map could be configured outside so that just one entry has to adjusted rather than creating a full copy of the /etc/map tree.
At runtime these are the resolved values:
Not only does that make it easier and faster to create new test environments but it also cuts down on the chance of copy-n-paste errors.
I have a working POC with an PlaceholderProvider OSGi service and an enhanced MapEntries that resolved any placeholders if found.
Attached are 3 screenshots:
1. OSGi Placeholder Provider Configuration
2. /etc/map (Composum)
3. Result of http://andreass.local:8080/ call