Implement insectrc (closes #107)

[Mstrodl]

On startup, insect will read and execute ~/.insectrc before evaluating anything. If this behaviour isn't desired, the user can simply set the INSECT_NO_RC environment variable to true to disable it.

This is useful for a few reasons. Personally, I'm using it to keep some commonly-used functions:

cosecant(x)=1/sin(x)
csc(x)=cosecant(x)

secant(x)=1/cos(x)

cotangent(x)=1/tan(x)
cot(x)=cotangent(x)

[sharkdp]

Awesome, thank you very much for your contribution!

[davidrihtarsic]

Hi,
can you help me with the implementation of .insectrc?
I'm using insect from AUR:

╰> pacman -Qi insect
Name            : insect
Version         : 5.6.0-2
...

I have created the .insectrc file in my home dir.:

╰> ls -al ~/.ins*
-rw-r--r-- 1 david users 48 Sep 30 10:10 /home/david/.insectrc

with the content:

╰> cat .insectrc
set displayed_digits 10
set prompt "insect >>>"

when I run insect nothing is changed

╰> insect
>>> pi
  pi
   = 3.14159

... so, what am I doing wrong?

[Mstrodl]

@davidrihtarsic your insectrc is not a valid expression:

[davidrihtarsic]

@Mstrodl thx for the answer. OK, fair enough... I changed the content in .insectrc to:

╰> cat .insectrc
multi(x,y)=x*y

... but when I run insect, the function is not working:

╰> insect
>>> multi(2,3)
  Parse error at position 8: Expected ")"
>>>

However, if I run these commands inside insect, I get these results:

╰> insect
>>> multi(x,y)=x*y
  multi(x, y) = x × y
>>> multi(2,3)
  multi(2, 3)
   = 6
>>>

I really love insect, I use it on a daily basis, but it would be very nice to have some personal functions inside. Does anyone knows if there is a way to run it in debug mode e.g.:

insect --verbose

... do you have any other ideas?

[sharkdp]

How did you install insect? I guess I haven't released a new version since this feature was merged.

[davidrihtarsic]

@sharkdp thx for your comment.
As I wrote, I'm using insect from AUR (on Linux) and currently running version: 5.6.0-2. OK, if this feature is not jet available I'll wait and I look forward to it.

[sharkdp]

This is now available in v5.7.0. I also updated the insect package on AUR. Let me know if this works, @davidrihtarsic

[gennaro-tedesco]

Very excited to have the .insectrc! Do we have some lines of documentation somewhere that indicate the grammar for it or does it simply accept any insect valid expression?

[sharkdp]

Do we have some lines of documentation somewhere that indicate the grammar for it or does it simply accept any insect valid expression?

The latter, correct. There's nothing special about the insectrc environment.

[gennaro-tedesco]

The latter, correct. There's nothing special about the insectrc environment.

Great, thank you. If I understand correctly, however, the keyword set(as per #107) is not implemented yet, is it (which makes the .insectrc at the moment only accepting user-defined functions)?

[sharkdp]

Oh, right. I'll reopen that ticket.

which makes the .insectrc at the moment only accepting user-defined functions

.. and variables, yes.