Eshell, history expansion commands fail with "command not found"
reddit / emacs

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mjgasc · 2022-12-15 07:37

Hi.

I'm studying eshell and I've found problems when using history
expansion. Commands like !n or !! fail to expand to the referred
command. This is what I mean:

    ~ $ history
    1  pwd
    2  ls -l
    3  date
    4  history
    ~ $ !!
    !!: command not found
    ~ $ !2
    !2: command not found

That was run on an eshell session, emacs 28.1 (built myself from
source with default options) started with --no-init-file option.

There's something I'm doing wrong ?

Thanks in advance.

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oantolin · 2022-12-15 13:37

eshell does not have that feature.

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gusbrs · 2022-12-15 14:35

I think it does, though. As usual eshell documentation is scant, but
it is included in Mickey's guide to it:
https://www.masteringemacs.org/article/complete-guide-mastering-
eshell.
Taking a look at `(info "(eshell) History")`, it seems this is not
enabled by default and we need `(add-hook 'eshell-expand-input-
functions 'eshell-expand-history-references)`.

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oantolin · 2022-12-15 14:37

Woah, cool! I did not remember that at all even though I did read and
love Petersen's guide. That guide is what convinced me to buy his
book.

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mjgasc · 2022-12-15 14:41

Thank you!

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gusbrs · 2022-12-15 14:42

Yeah, I never miss his posts.  ;-)