29

I have enabled correction (I wouldn't call it autocorrection specifically because of this issue) in zsh by enabling setopt correct in my .zshrc.

Now, when I type dtae in a terminal, I get:

dtae        
zsh: correct 'dtae' to 'date' [nyae]? y
Tue Mar 31 11:39:31 CEST 2015

At this point I would like zsh to remember my decision. So the next time I type dtae it should automatically correct to date [1]. However, this does not happen, and zsh is again asking me what to do:

dtae
zsh: correct 'dtae' to 'date' [nyae]?

[1] Unless, of course, if at that time there exists an actual dtae command or alias.

Update:

I have managed to modify the zsh source code (file utils.c, function spckword) to create a custom file containing the aliases automatically created with the invocation of zsh's "correct" functionality:

original:

if (x == 'y' || x == ' ' || x == '\t') 
{
    *s = dupstring(best);
    if (hist)
    hwrep(best);
}

modified:

if (x == 'y' || x == ' ' || x == '\t')
{
    char *aliaspath = getenv("HOME");
    strcat(aliaspath, "/.zsh_correct_aliases");
    FILE *out = fopen(aliaspath, "ab+");
    fprintf(out, "alias %s=\'", *s);
    *s = dupstring(best);
    fprintf(out, "%s\'\n", *s);
    fclose(out);
    if (hist)
    hwrep(best);
}

Upon executing dtae, the following line is added to the file ~/.zsh_correct_aliases:

alias dtae='date'

However, I don't know how to source the newly modified ~/.zsh_correct_aliases file in-place.

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10
  • 1
    Do you want it remembered only for the shell process lifetime, or that information stored in files. Should that remembered correction be immediately available to all currently running shell instances? Do you want the remembered correction removed when dtae spawns into existence or just disabled temporarily?
    – Stéphane Chazelas
    Commented Mar 31, 2015 at 11:23
  • 1
    @StéphaneChazelas 1) Stored in a single file would be best. 2) It would be a plus, but not strictly necessary. 3) Removed until dtae exists, then reinstated if/when dtae is not defined anymore.
    – shrx
    Commented Mar 31, 2015 at 11:38
  • 3
    It would probably make more sense to call a dedicated zsh hook function there (like a command_not_found_handler but at parsing time instead of runtime), and then implement the logic in zsh code.
    – Stéphane Chazelas
    Commented Mar 31, 2015 at 14:01
  • 7
    I do not think this is considered good practice... I feel it is much more efficient to learn how to type correctly.
    – Peschke
    Commented Sep 24, 2015 at 20:40
  • 2
    I'm just curious, for this specific use at least, why not just have the code add the aliases to the end of .zshrc, or somehow do that same but by cating .zsh_correct_aliases into .zshrc. Obscursing that with some hashing, obscurity/variables, or better, as needed for security
    – olaf atchmi
    Commented Jun 22, 2016 at 10:18

2 Answers 2

Reset to default
3

You could base your code on the built-in alias defined here

HashTable ht = aliastab;
ht->addnode(ht, ztrdup(wrong_value),
            createaliasnode(ztrdup(right_value), 0));

(not tested)

And add source ~/.zsh_correct_aliases to you .zshrc

EDIT: tested with source:

char *aliaspath = getenv("HOME");
strcat(aliaspath, "/.zsh_correct_aliases");

FILE *out = fopen(aliaspath, "ab+");
fprintf(out, "alias %s=\'", *s);

HashTable ht = aliastab;
ht->addnode(ht, ztrdup(*s),
    createaliasnode(ztrdup(best), 0));

*s = dupstring(best);
fprintf(out, "%s\'\n", *s);
fclose(out);
if (hist)
    hwrep(best);

It gives:

$ setopt correct 
$ dtea    
zsh: correct 'dtea' to 'date' [nyae]? y
lun. janv.  8 01:03:55 CET 2018  
$ alias  
dtea=date
$ dtea    
lun. janv.  8 01:07:42 CET 2018
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1

You could define a precmd function that sources ~/.zsh_correct_aliases.

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