Color flag is not working after upgrade

[albertschwarzkopf]

Hi, since latest version 3.14.0 the flag --color is not working anymore:

helm diff upgrade --color -f values.yaml

The error is:

level=WARN msg="command failed" error="invalid color mode \"-f\": must be one of: never, auto, always"

After downgrade to version v3.13.2 it works again.

Seems that it is necessary to set one of the values never, auto, always now.

Would be nice if you could fix it or update the documentation.

[yxxhero]

@albertschwarzkopf got it.

[runningman84]

it would be great to have the command line option backward compatible.

[yxxhero]

@runningman84 this is helm v4 error message. plase show you helm and helm-diff version.

[runningman84]

we used helm 4.0.0 and helm-diff 3.14.0

[yxxhero]

@runningman84 helm v4 and helm diff v3.13.2 is ok?

[runningman84]

╭─ user@machine    ~/Doc*/gith*/web-bedrock-sample  ⎈ mycluster/default         master    189  1                                    
╰─ helm plugin install --verify=false https://github.com/databus23/helm-diff --version 3.13.2
WARNING: Skipping plugin signature verification
Downloading https://github.com/databus23/helm-diff/releases/download/v3.13.2/helm-diff-macos-arm64.tgz
Preparing to install into /Users/myuser/Library/helm/plugins/helm-diff
Installed plugin: diff
╭─ user@machine    ~/Doc*/gith*/web-bedrock-sample  ⎈ mycluster/default         master    189  1                          6.07s   
╰─ helm plugin list                                                                          
NAME	VERSION	TYPE  	APIVERSION	PROVENANCE	SOURCE 
diff	3.13.2 	cli/v1	legacy    	unknown   	unknown
╭─ user@machine    ~/Doc*/gith*/web-bedrock-sample  ⎈ mycluster/default         master    189  1                                    
╰─ helm diff upgrade app-caddy ../helm-chart-caddy --color -f values.yaml                    
level=WARN msg="command failed" error="invalid color mode \"-f\": must be one of: never, auto, always"
╭─ user@machine    ~/Doc*/gith*/web-bedrock-sample  ⎈ mycluster/default         master    189  1                                 1 ↵ 
╰─ helm version
version.BuildInfo{Version:"v4.0.0", GitCommit:"99cd1964357c793351be481d55abbe21c6b2f4ec", GitTreeState:"clean", GoVersion:"go1.25.4", KubeClientVersion:"v1.34"}

[yxxhero]

@runningman84 you can set it by env var.