Spacemacs home buffer replaces buffers when reattaching to a session.

[GregorySchwartz]

Description

Attaching to emacs session replaces focused buffer with the spacemacs home
screen. When using the emacs daemon as a session (like tmux), it's inefficient
to have the previous layout interrupted due to the home screen replacing a
buffer. It's easily fixed by opening the previous buffer, but sometimes I have
to search for which file or terminal I was using and it's an unnecessary
roadblock. I suggest to only have the spacemacs home screen when the emacsclient
does not attach to a layout with opened buffers.

Reproduction guide

• Start Emacs
• Open files
• C-x 5 0
• Start Emacs

Observed behaviour:
Most recent buffer is replaced with the spacemacs home buffer.

Expected behaviour:
The entire layout is preserved from the previous attachment to the session.

System Info

• OS: gnu/linux
• Emacs: 24.5.1
• Spacemacs: 0.105.21
• Spacemacs branch: develop (rev. b2d1088)
• Graphic display: t or nil
• Distribution: spacemacs
• Editing style: vim
• Completion: helm
• Layers:

((auto-completion :variables auto-completion-enable-sort-by-usage)
 better-defaults emacs-lisp git markdown
 (org :variables org-enable-reveal-js-support t)
 (shell :variables shell-default-height 30 shell-default-position 'bottom shell-default-shell 'multi-term shell-default-term-shell "/usr/bin/fish")
 spell-checking syntax-checking version-control
 (haskell :variables haskell-completion-backend 'intero)
 erc)

[lverns]

As I understand it, this is not really an issue with Spacemacs, but with Emacs itself.

Expected behaviour:
The entire layout is preserved from the previous attachment to the session.

When running in daemon mode, one can launch many different instances of emacsclient at once, and their "layouts" are manipulated independently. Because of this, I don't think that "previous attachment" can be defined well.

Experimenting with Emacs 24.5.2 and emacs --no-init --daemon shows that emacsclient -c always opens to the scratch buffer.

[GregorySchwartz]

Interesting. When I use emacsclient -c it always does the behavior I descript using the "previous attachment". I was using a spacemacs configuration, though. There is clearly some saving going on, otherwise that "saved" layout would not be possible.

[leezu]

I experience the same behavior as @GregorySchwartz: emacsclient -c shows the "previous attachement" if it is started multiple times (instead of the scratch buffer). I believe this is a bug induced by persp-mode and have reported it as #7644

[github-actions]

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