Limiting init loading when running --batch

Limiting init loading when running --batch

[Tory S. Anderson]

I use --batch as part of a shell script to export my orgmode agenda as an ICS file and upload it to a server where it is read by Google Calendar. But when I run batch, it loads my entire emacs (most of which is not necessary for this operation) and sometimes chokes on lines that are apparently incompatible. Is there a way to avoid loading the whole init file, or to prepend lines with something that would except them from batch runs? 

RE: Limiting init loading when running --batch

[Drew Adams]

> I use --batch as part of a shell script to export my orgmode agenda as an
> ICS file and upload it to a server where it is read by Google Calendar. But
> when I run batch, it loads my entire emacs (most of which is not necessary
> for this operation) and sometimes chokes on lines that are apparently
> incompatible. Is there a way to avoid loading the whole init file, or to
> prepend lines with something that would except them from batch runs?

You can test the variable `noninteractive' in your init file, and
load or invoke code conditionally, depending on the value.

RE: Limiting init loading when running --batch

[Drew Adams]

> > I use --batch as part of a shell script to export my orgmode agenda as an
> > ICS file and upload it to a server where it is read by Google Calendar.
> But
> > when I run batch, it loads my entire emacs (most of which is not necessary
> > for this operation) and sometimes chokes on lines that are apparently
> > incompatible. Is there a way to avoid loading the whole init file, or to
> > prepend lines with something that would except them from batch runs?
> 
> You can test the variable `noninteractive' in your init file, and
> load or invoke code conditionally, depending on the value.

http://www.gnu.org/software/emacs/manual/html_node/elisp/Batch-Mode.html

Which you can find by using `i' in the Elisp manual and typing `batch TAB'.

Re: Limiting init loading when running --batch

[Emanuel Berg]

torys.anderson@gmail.com (Tory S. Anderson) writes:

> I use --batch as part of a shell script to export my
> orgmode agenda as an ICS file and upload it to a
> server where it is read by Google Calendar. But when
> I run batch, it loads my entire emacs (most of which
> is not necessary for this operation) and sometimes
> chokes on lines that are apparently incompatible. Is
> there a way to avoid loading the whole init file, or
> to prepend lines with something that would except
> them from batch runs?

Yes, check out the man page how to not load the init
file. It can be done with either -q or -Q. Then use -l
to load another file that you prefer for this
operation, if you need one. There are many things you
can do, but the man page is a good start.

Here is an example of a function that takes a file as
input, executes some Elisp commands on it, then sends
the result to another program. Something similar is
what you will do, only different :)

    justify () {
        local file=$1
        emacs --batch --eval "
          (progn
            (find-file \"$file\")
            (setq fill-column 54)
            (fill-region (point-min) (point-max) 'full)
            (princ (buffer-string))
            (kill-buffer) )" 2> /dev/null \
                | pr --indent=8 -w 62 -l 68
    }

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