docs: add config file tips section telling about env var expansion

2 years ago · cda3f1ea8c
parent 54a6e6cca6
commit cda3f1ea8c
1 changed files with 4 additions and 0 deletions
--- a/docs/usage/configfile.md
+++ b/docs/usage/configfile.md
@ -120,6 +120,10 @@ options:

 ```

+## Tips
+
+- k3d [expands environment variables](https://pkg.go.dev/os#ExpandEnv) (`$VAR` or `${VAR}`) unconditionally in the config file, even before processing it in any way.  
+
 ## Config File vs. CLI Flags

 k3d uses [`Cobra`](https://github.com/spf13/cobra) and [`Viper`](https://github.com/spf13/viper) for CLI and general config handling respectively.