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Support extensionless file imports

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Update `ResourceConfigDataLocationResolver` so that it can import files
that have no file extension.

Closes gh-22280
This commit is contained in:
Phillip Webb
2020-08-25 13:57:10 -07:00
parent 081a7ee28c
commit d0fce0553f
4 changed files with 39 additions and 2 deletions
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15
spring-boot-project/spring-boot-docs/src/docs/asciidoc/spring-boot-features.adoc
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@@ -698,6 +698,21 @@ If you want to support your own locations, see the `ConfigDataLocationResolver`
==== Importing Extensionless Files
Some cloud platforms cannot add a file extension to volume mounted files.
To import these extensionless files, you need to give Spring Boot a hint so that it knows how to load them.
You can do this by putting an extension hint in square brackets.
For example, suppose you have a `/etc/config/myconfig` file that you wish to import as yaml.
You can import it from your `application.properties` using the following:
[source,properties,indent=0]
----
spring.config.import=file:/etc/config/myconfig[.yaml]
----
[[boot-features-external-config-files-configtree]]
==== Using Configuration Trees
When running applications on a cloud platform (such as Kubernetes) you often need to read config values that the platform supplies.