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1

Is it possible to set Emacs start-up command-line flags such as -nw and -q in an init file? If it is, how can I do that?

init-file command-line-arguments

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edited 8 hours ago

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1

Is it possible to set Emacs start-up command-line flags such as -nw and -q in an init file? If it is, how can I do that?

init-file command-line-arguments

share|improve this question

edited 8 hours ago

Drew

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asked 9 hours ago

cig0cig0

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add a comment | 

Is it possible to set Emacs start-up command-line flags such as -nw and -q in an init file? If it is, how can I do that?

init-file command-line-arguments

share|improve this question

edited 8 hours ago

Drew

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asked 9 hours ago

cig0cig0

1411 bronze badge

share|improve this question

edited 8 hours ago

Drew

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asked 9 hours ago

cig0cig0

1411 bronze badge

share|improve this question

edited 8 hours ago

Drew

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asked 9 hours ago

cig0cig0

1411 bronze badge

edited 8 hours ago

Drew

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edited 8 hours ago

Drew

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asked 9 hours ago

cig0cig0

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2 Answers
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1

You can modify the command line arguments in an init file if you want. But if you do that after Emacs has processed the argument, it won't have any effect.

Emacs processes command line arguments in two places: in the C startup code, and in startup.el. The C startup code processes arguments before it executes any Lisp code, so there's no way to influence that from an init file. As of Emacs 26.2, the following options are handled in C: --version, --chdir, -t, -nw, --batch, --script, -daemon, --bg-daemon, --fg-daemon, --help, --no-loadup, --no-site-lisp, --no-build-details, --module-assertions and (partially) --display.

So in particular there's no way to completely prevent the initialization of the window system (-nw) from Lisp.

You can modify other options from a Lisp file that's loaded before startup.el processes the command line. The main relevant steps are:

• Load subdirs.el from directories on the load path. You can control this with the environment variable EMACSLOADPATH.


• Process some command line options (code), including the ones that control what init files to load (e.g. -Q, -q) and a few user interface variables (including -display).


• Finish initializing the window system and create the initial frame.


• Load site-start.el (prevented by -Q) and the user init file (.emacs or other name, prevented by -q or -batch).


• Call package-initialize.


• Process remaining command line options (code), including options that control the appearance of Emacs and options to run code and open files (-l, --eval, --find-file, …).

share|improve this answer

answered 7 hours ago

Gilles♦Gilles

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1

Is it possible to set Emacs start-up command-line flags such as -nw and -q in an init file? If it is, how can I do that?

In general, no, you can't do that -- and your second example option is precisely what I would have used to explain why:

-q (aka --no-init-file) tells Emacs not to load your init file, so trying to set that option in your init file does not make sense.

That said... some arguments are processed after loading the init file, and so for certain arguments you could populate the command-line-args variable in your init file to imitate using them on the command line. These options include:

--directory

--eval

--execute

--file

--find-file

--funcall

--insert

--kill

--load

--no-desktop

--no-splash

--visit

e.g.:

(setq command-line-args

      (append command-line-args '("--eval"

                                  "(message "hello")")))

I would not expect there to be any benefit to jumping through such hoops to use these "Action options" in your init file, as there are more direct ways of performing the actions.

share|improve this answer

edited 6 hours ago

answered 7 hours ago

philsphils

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1

You can modify the command line arguments in an init file if you want. But if you do that after Emacs has processed the argument, it won't have any effect.

Emacs processes command line arguments in two places: in the C startup code, and in startup.el. The C startup code processes arguments before it executes any Lisp code, so there's no way to influence that from an init file. As of Emacs 26.2, the following options are handled in C: --version, --chdir, -t, -nw, --batch, --script, -daemon, --bg-daemon, --fg-daemon, --help, --no-loadup, --no-site-lisp, --no-build-details, --module-assertions and (partially) --display.

So in particular there's no way to completely prevent the initialization of the window system (-nw) from Lisp.

You can modify other options from a Lisp file that's loaded before startup.el processes the command line. The main relevant steps are:

• Load subdirs.el from directories on the load path. You can control this with the environment variable EMACSLOADPATH.


• Process some command line options (code), including the ones that control what init files to load (e.g. -Q, -q) and a few user interface variables (including -display).


• Finish initializing the window system and create the initial frame.


• Load site-start.el (prevented by -Q) and the user init file (.emacs or other name, prevented by -q or -batch).


• Call package-initialize.


• Process remaining command line options (code), including options that control the appearance of Emacs and options to run code and open files (-l, --eval, --find-file, …).

share|improve this answer

answered 7 hours ago

Gilles♦Gilles

13.8k44 gold badges3636 silver badges7575 bronze badges

add a comment | 

1

You can modify the command line arguments in an init file if you want. But if you do that after Emacs has processed the argument, it won't have any effect.

Emacs processes command line arguments in two places: in the C startup code, and in startup.el. The C startup code processes arguments before it executes any Lisp code, so there's no way to influence that from an init file. As of Emacs 26.2, the following options are handled in C: --version, --chdir, -t, -nw, --batch, --script, -daemon, --bg-daemon, --fg-daemon, --help, --no-loadup, --no-site-lisp, --no-build-details, --module-assertions and (partially) --display.

So in particular there's no way to completely prevent the initialization of the window system (-nw) from Lisp.

You can modify other options from a Lisp file that's loaded before startup.el processes the command line. The main relevant steps are:

• Load subdirs.el from directories on the load path. You can control this with the environment variable EMACSLOADPATH.


• Process some command line options (code), including the ones that control what init files to load (e.g. -Q, -q) and a few user interface variables (including -display).


• Finish initializing the window system and create the initial frame.


• Load site-start.el (prevented by -Q) and the user init file (.emacs or other name, prevented by -q or -batch).


• Call package-initialize.


• Process remaining command line options (code), including options that control the appearance of Emacs and options to run code and open files (-l, --eval, --find-file, …).

share|improve this answer

answered 7 hours ago

Gilles♦Gilles

13.8k44 gold badges3636 silver badges7575 bronze badges

add a comment | 

You can modify the command line arguments in an init file if you want. But if you do that after Emacs has processed the argument, it won't have any effect.

Emacs processes command line arguments in two places: in the C startup code, and in startup.el. The C startup code processes arguments before it executes any Lisp code, so there's no way to influence that from an init file. As of Emacs 26.2, the following options are handled in C: --version, --chdir, -t, -nw, --batch, --script, -daemon, --bg-daemon, --fg-daemon, --help, --no-loadup, --no-site-lisp, --no-build-details, --module-assertions and (partially) --display.

So in particular there's no way to completely prevent the initialization of the window system (-nw) from Lisp.

You can modify other options from a Lisp file that's loaded before startup.el processes the command line. The main relevant steps are:

• Load subdirs.el from directories on the load path. You can control this with the environment variable EMACSLOADPATH.


• Process some command line options (code), including the ones that control what init files to load (e.g. -Q, -q) and a few user interface variables (including -display).


• Finish initializing the window system and create the initial frame.


• Load site-start.el (prevented by -Q) and the user init file (.emacs or other name, prevented by -q or -batch).


• Call package-initialize.


• Process remaining command line options (code), including options that control the appearance of Emacs and options to run code and open files (-l, --eval, --find-file, …).

share|improve this answer

answered 7 hours ago

Gilles♦Gilles

13.8k44 gold badges3636 silver badges7575 bronze badges

share|improve this answer

answered 7 hours ago

Gilles♦Gilles

13.8k44 gold badges3636 silver badges7575 bronze badges

answered 7 hours ago

Gilles♦Gilles

13.8k44 gold badges3636 silver badges7575 bronze badges

answered 7 hours ago

Gilles♦Gilles

13.8k44 gold badges3636 silver badges7575 bronze badges

1

Is it possible to set Emacs start-up command-line flags such as -nw and -q in an init file? If it is, how can I do that?

In general, no, you can't do that -- and your second example option is precisely what I would have used to explain why:

-q (aka --no-init-file) tells Emacs not to load your init file, so trying to set that option in your init file does not make sense.

That said... some arguments are processed after loading the init file, and so for certain arguments you could populate the command-line-args variable in your init file to imitate using them on the command line. These options include:

--directory

--eval

--execute

--file

--find-file

--funcall

--insert

--kill

--load

--no-desktop

--no-splash

--visit

e.g.:

(setq command-line-args

      (append command-line-args '("--eval"

                                  "(message "hello")")))

I would not expect there to be any benefit to jumping through such hoops to use these "Action options" in your init file, as there are more direct ways of performing the actions.

share|improve this answer

edited 6 hours ago

answered 7 hours ago

philsphils

29.1k22 gold badges4040 silver badges7575 bronze badges

add a comment | 

1

Is it possible to set Emacs start-up command-line flags such as -nw and -q in an init file? If it is, how can I do that?

In general, no, you can't do that -- and your second example option is precisely what I would have used to explain why:

-q (aka --no-init-file) tells Emacs not to load your init file, so trying to set that option in your init file does not make sense.

That said... some arguments are processed after loading the init file, and so for certain arguments you could populate the command-line-args variable in your init file to imitate using them on the command line. These options include:

--directory

--eval

--execute

--file

--find-file

--funcall

--insert

--kill

--load

--no-desktop

--no-splash

--visit

e.g.:

(setq command-line-args

      (append command-line-args '("--eval"

                                  "(message "hello")")))

I would not expect there to be any benefit to jumping through such hoops to use these "Action options" in your init file, as there are more direct ways of performing the actions.

share|improve this answer

edited 6 hours ago

answered 7 hours ago

philsphils

29.1k22 gold badges4040 silver badges7575 bronze badges

add a comment | 

Is it possible to set Emacs start-up command-line flags such as -nw and -q in an init file? If it is, how can I do that?

In general, no, you can't do that -- and your second example option is precisely what I would have used to explain why:

-q (aka --no-init-file) tells Emacs not to load your init file, so trying to set that option in your init file does not make sense.

That said... some arguments are processed after loading the init file, and so for certain arguments you could populate the command-line-args variable in your init file to imitate using them on the command line. These options include:

--directory

--eval

--execute

--file

--find-file

--funcall

--insert

--kill

--load

--no-desktop

--no-splash

--visit

e.g.:

(setq command-line-args

      (append command-line-args '("--eval"

                                  "(message "hello")")))

I would not expect there to be any benefit to jumping through such hoops to use these "Action options" in your init file, as there are more direct ways of performing the actions.

share|improve this answer

edited 6 hours ago

answered 7 hours ago

philsphils

29.1k22 gold badges4040 silver badges7575 bronze badges

--directory

--eval

--execute

--file

--find-file

--funcall

--insert

--kill

--load

--no-desktop

--no-splash

--visit

(setq command-line-args

      (append command-line-args '("--eval"

                                  "(message "hello")")))

share|improve this answer

edited 6 hours ago

answered 7 hours ago

philsphils

29.1k22 gold badges4040 silver badges7575 bronze badges

answered 7 hours ago

philsphils

29.1k22 gold badges4040 silver badges7575 bronze badges

answered 7 hours ago

philsphils

29.1k22 gold badges4040 silver badges7575 bronze badges