Emacs Stack Exchange
Emacs Stack Exchange

Questions tagged [custom]

Use for questions about the built-in GUI customization features

22 questions
89
votes
4 answers

Advantages of setting variables with setq instead of custom.el?

I see a lot of people (extension authors and others) give configuration examples with setq: (setq foo 'bar) These parameters are often defined with defcustom, making them available for customization through custom.el. I typically use custom.el to…
J David Smith
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31
votes
3 answers

Reset custom variable to default value programmatically

Q: Using Elisp, how can I reset a variable to its default value without knowing what that value is? I tried to figure out how to do this by bringing up the Customize interface for a variable I set to a non-default value in my init-file and pressing…
itsjeyd
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7
votes
2 answers

Stop org-mode from defining agenda files in custom

I have the following line in my .emacs: (setq org-agenda-files (directory-files "~/org-files" 'absolute "[^#]*.org$" 'no-sort)) I would like for org-agenda-files to be defined in this way on startup. However, a (custom-set-variables…
Matthew Piziak
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7
votes
1 answer

Where is the default color / custom theme defined?

When you start Emacs with emacs -Q, there appears to be some sort of default color scheme. Where are these colors defined? The default theme does not show up with M-x customize, nor can I find it in etc/themes. I have even tried taking a screenshot…
Jackson
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7
votes
1 answer

Add to a list that defcustom has not yet defined

We can avoid adding duplicate elements to a list variable by using add-to-list. When setting a customizable variable (i.e. one that is or will be defined by defcustom) from our init file, we're encouraged to use custom-set-variables (or…
ivan
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3
votes
2 answers

A custom type specification like “repeat,” but when there’s only one item, it’s inline

So, I’m trying to add Customize support to packages that use a lot of plists, and where the value of pretty much any option can be either a single item or a list. I could have every single plist option’s value-type wrapped in a choice between…
Tina Russell
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3
votes
1 answer

how to use custom-set-variables safely?

The help for custom-set-variables says: The arguments should each be a list of the form: (SYMBOL EXP [NOW [REQUEST [COMMENT]]]) This stores EXP (without evaluating it) as the saved value for SYMBOL. If NOW is present and non-nil, then also…
Adam Spiers
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2
votes
1 answer

What is causing this error: "Cannot open load file, no such file or directory, session"?

From time to time my Emacs doesn't load my init file at startup and gives me the following error message: File error: Cannot open load file, no such file or directory, session To ensure normal operation, you should investigate and remove the cause…
clemera
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1
vote
1 answer

Automatically prompt for comment character and apply it in older versions of emacs

When I try to comment a block of code using comment-region in a file type emacs doesn't know the proper comment type for, then it prompts me No comment syntax is defined. Use: so I can specify the comment character and it works. However this only…
Joey O
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1
vote
1 answer

How to check if a customize group exists in Emacs Lisp code?

How can I programmatically check if a customize group exists? Interactively I can use M-x customize-group and use completion to see if a specific group exists or not. But that's not what I need. If I evaluate: (customize-group…
PRouleau
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1
vote
1 answer

Replace a filename in init.el using sed from bash script

So I have different customized themes. Different customized themes are written to a separate custom .el files and get called in the main init.el file. For example: (setq custom-file "~/.emacs.d/myCustomSettings/customDarkLaptop.el") will call the…
mle0312
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1
vote
0 answers

Massively long text boxes and yasnippet highlighting

Why are my text boxes and yasnippet field highlights so massively long? Is there a way to change this behavior? If so, what are the necessary steps that need to be taken to solve this issue? The behavior can be seen like so: When…
John DeBord
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1
vote
1 answer

macro takes multiple pairs of arguments

I found this snippet of code from oremacs (defmacro csetq (variable value) `(funcall (or (get ',variable 'custom-set) 'set-default) ',variable ,value)) I would like to expand this macro so that is can take multiple pairs of arguments similar to…
Prgrm.celeritas
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1
vote
1 answer

What happens when there is more than one custom-set-variables?

a quote from my init.el: ;; custom-set-variables was added by Custom. ... ;; Your init file should contain only one such instance. ;; If there is more than one, they won't work right. What exactly will happen? I've found no hint in…
Markus Grunwald
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1
vote
1 answer

Save filesets-data in file which is not the custom-file or other emacs config file

Background I store Emacs my configuration in a .emacs and separate custom file. I would like to store both in a public repository like Github. I also use filesets which saves filenames & file paths in one of these files. Data associated with…
Mikef
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1
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