fix(context): guard nil local config before context switch

[Rahulatram321]

Description

This PR fixes a crash path in the microcks context command when no local config exists yet.

Problem

When running microcks context <context-name> on a fresh machine (or after config cleanup), localCfg can be nil.
The command dereferences localCfg (localCfg.CurrentContext) without a nil guard, which can lead to a nil pointer panic instead of a user-friendly message.

Changes

• Added a defensive localCfg == nil check in cmd/context.go before first dereference in the context-switch flow.
• Preserved current behavior for:
  • microcks context (no args): still lists contexts / prints existing output path.
  • microcks context --delete ...: unchanged.

Result

• No panic when config is missing.
• Users now get a clear, deterministic error path instead of a runtime crash.

[github-actions]

👋 @Rahulatram321

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Thanks and congrats 🎉 for opening your first pull request here! Be sure to follow the pull request template or please update it accordingly.

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[Vaishnav88sk]

please pass the DCO

[Rahulatram321]

please pass the DCO

Thanks for the review and for flagging this.

I’ve updated this PR by rewriting the commit(s) with DCO sign-off and force-pushed the branch.
Each commit now includes:

Signed-off-by: Rahul Atram rahulatram0226@gmail.com

I also kept the scope unchanged to only the intended fix in this PR.
Could you please recheck when the DCO status refreshes? Thanks again.

[Rahulatram321]

Hi Sir, Thank you for pointing this out. I have updated this PR by rewriting the commit history with DCO sign-off and force-pushing the branch. All commits now include: Signed-off-by: Rahul Atram ***@***.***> The PR scope is unchanged and remains limited to the original fix only. Could you please recheck once the DCO status updates? Thanks again for your guidance. Best, Rahul Atram <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Virus-free.www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

…

On Sat, May 23, 2026 at 11:35 PM Vaishnav Kale ***@***.***> wrote: *Vaishnav88sk* left a comment (microcks/microcks-cli#406) <#406 (comment)> please pass the DCO — Reply to this email directly, view it on GitHub <#406 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BER7XKED5Z2DQFRPQ224A3D44HR73AVCNFSM6AAAAACZCRKFX2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHM2DKMRWGE2TEOBZGY> . You are receiving this because you modified the open/close state.Message ID: ***@***.***>

[Caesarsage]

Thanks! The context command on master now nil-guards the local config before use, so this is superseded. Appreciate the effort.

Suggest closing this

[Harsh4902]

Thanks @Rahulatram321 and sorry we couldn't merge this erlier. As it's already tackled on master, we have to close this.