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Add documentation on internal environment variables (#811)

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Signed-off-by: Alex Vorona <alex@vorona.com.ua>
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Oleksandr Vorona
2023-04-18 19:24:48 +08:00
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@@ -499,6 +499,21 @@ releases:
If you wish to treat your enviroment variables as strings always, even if they are boolean or numeric values you can use `{{ env "ENV_NAME" | quote }}` or `"{{ env "ENV_NAME" }}"`. These approaches also work with `requiredEnv`.
### Useful internal Helmfile environment variables
Helmfile uses some OS environment variables to override default behaviour:
* `HELMFILE_DISABLE_INSECURE_FEATURES` - disable insecure features, expecting `true` lower case
* `HELMFILE_DISABLE_RUNNER_UNIQUE_ID` - disable unique logging ID, expecting any non-empty value
* `HELMFILE_SKIP_INSECURE_TEMPLATE_FUNCTIONS` - disable insecure template functions, expecting `true` lower case
* `HELMFILE_EXPERIMENTAL` - enable experimental features, expecting `true` lower case
* `HELMFILE_ENVIRONMENT` - specify [Helmfile environment](https://helmfile.readthedocs.io/en/latest/#environment), it has lower priority than CLI argument `--environment`
* `HELMFILE_TEMPDIR` - specify directory to store temporary files
* `HELMFILE_UPGRADE_NOTICE_DISABLED` - expecting any non-empty value to skip the check for the latest version of Helmfile in [helmfile version](https://helmfile.readthedocs.io/en/latest/#version)
* `HELMFILE_V1MODE` - Helmfile v0.x behaves like v1.x with `true`, Helmfile v1.x behaves like v0.x with `false` as value
* `HELMFILE_GOCCY_GOYAML` - use *goccy/go-yaml* instead of *gopkg.in/yaml.v2*. It's `false` by default in Helmfile v0.x and `true` by default for Helmfile v1.x.
* `HELMFILE_CACHE_HOME` - specify directory to store cached files for remote operations
## CLI Reference
```
@@ -540,7 +555,7 @@ Flags:
--disable-force-update do not force helm repos to update when executing "helm repo add"
--enable-live-output Show live output from the Helm binary Stdout/Stderr into Helmfile own Stdout/Stderr.
It only applies for the Helm CLI commands, Stdout/Stderr for Hooks are still displayed only when it's execution finishes.
-e, --environment string specify the environment name. defaults to "default"
-e, --environment string specify the environment name. Overrides "HELMFILE_ENVIRONMENT" OS environment variable when specified. defaults to "default"
-f, --file helmfile.yaml load config from file or directory. defaults to helmfile.yaml or `helmfile.yaml.gotmpl` or `helmfile.d`(means `helmfile.d/*.yaml` or `helmfile.d/*.yaml.gotmpl`) in this preference. Specify - to load the config from the standard input.
-b, --helm-binary string Path to the helm binary (default "helm")
-h, --help help for helmfile