zmv pattern for directory and multiple file types

zmv pattern for directory and multiple file types

[Ahmad Ismail]

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Hi All,

I have the following functions that rename files from camel to sort of
kebab case.

function ctokfiles() {
    # Transform [Capital][Capital][Small] to [Capital]-[Capital][Small]
    zmv -Q '(**/)(*[A-Z][A-Z][a-z]*)(.adoc|.txt)'
'$1${2//(#b)([A-Z])([A-Z][a-z])/$match[1]-$match[2]}$3'

    # Put - Between [Small][Capital]
    zmv -Q '(**/)(*[a-z][A-Z]*)(.adoc|.txt)'
'$1${2//(#b)([a-z])([A-Z])/$match[1]-$match[2]}$3'

    # Change [Capital][Small] to Lovercase
    zmv -Q '(**/)(*[A-Z][a-z]*)(.adoc|.txt)'
'$1${2//(#m)[A-Z][a-z]/${(L)MATCH}}$3'
}

So, IF the input name is "ThisIsMyOCDTalking", it becomes
"this-is-my-OCD-talking".

Now I want to rename directories, adoc & txt files only. For directories, I
think I have to use

    zmv -Q '(**/)(*[A-Z][A-Z][a-z]*)(/)'

How to make a function that will work on adoc, txt and directories. I tried
(/|.adoc|.txt), apparently not working.

One more thing, is there any way I can reduce the steps in this functions.

*Thanks and Best Regards,Ahmad Ismail*

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Re: zmv pattern for directory and multiple file types

[Daniel Shahaf]

Ahmad Ismail wrote on Sat, 14 Nov 2020 03:45 +0600:
> Hi All,
> 
> I have the following functions that rename files from camel to sort of
> kebab case.
> 
> function ctokfiles() {
>     # Transform [Capital][Capital][Small] to [Capital]-[Capital][Small]
>     zmv -Q '(**/)(*[A-Z][A-Z][a-z]*)(.adoc|.txt)' '$1${2//(#b)([A-Z])([A-Z][a-z])/$match[1]-$match[2]}$3'
> 
>     # Put - Between [Small][Capital]
>     zmv -Q '(**/)(*[a-z][A-Z]*)(.adoc|.txt)' '$1${2//(#b)([a-z])([A-Z])/$match[1]-$match[2]}$3'
> 
>     # Change [Capital][Small] to Lovercase
>     zmv -Q '(**/)(*[A-Z][a-z]*)(.adoc|.txt)' '$1${2//(#m)[A-Z][a-z]/${(L)MATCH}}$3'
> }  
> 
> So, IF the input name is "ThisIsMyOCDTalking", it becomes
> "this-is-my-OCD-talking".
> 
> Now I want to rename directories, adoc & txt files only. For directories, I
> think I have to use
> 
>     zmv -Q '(**/)(*[A-Z][A-Z][a-z]*)(/)'
> 
> How to make a function that will work on adoc, txt and directories. I tried
> (/|.adoc|.txt), apparently not working.
> 

Consider how in «*foo*(bar)», the «foo» are matched against the
filename but the «bar» are parsed as glob qualifiers.  You can't just
juxtapose them within the same set of parentheses; they're apples and
oranges.

I don't see a good solution for "Everything in «**/*» that's
a directory or named *.foo or *.bar".  I'd consider find(1) for this.

> One more thing, is there any way I can reduce the steps in this functions.

As a rule, I wouldn't recommend reducing steps in functions in the
first place, unless you're coding for sport rather than robustness — in
which case, I'd probably opt for Perl:

% print -rNC1 -- *.(adoc|txt)(N) *(/N) | rename -0 -n '$_ = join "-", map { /[a-z]/ ? lc : $_ } split /(?<=[a-z])(?=[A-Z])|(?=[A-Z][a-z])/'
rename(ThisIsMyOCDTalking.adoc, this-is-my-OCD-talking.adoc)
% 

The main algorithmic difference is splitting the filename into an array
on zero-width lookaround matches.  I don't think there's a native zsh
equivalent of this.

Note that changing «print -rNC1» to «ls» would introduce two separate bugs.

I'm not sure how to extend this to nested hierarchies, given the
possibility of foo/bar where both foo and bar have to be changed.
Perhaps with «rename -d» and ensuring the input is sorted children
before their parents.

Cheers,

Daniel

Re: zmv pattern for directory and multiple file types

[Ahmad Ismail]

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Hi Daniel Shahaf,

Thank you very much.

*Thanks and Best Regards,Ahmad Ismail*


On Tue, Nov 17, 2020 at 1:53 AM Daniel Shahaf <d.s@daniel.shahaf.name>
wrote:

> Ahmad Ismail wrote on Sat, 14 Nov 2020 03:45 +0600:
> > Hi All,
> >
> > I have the following functions that rename files from camel to sort of
> > kebab case.
> >
> > function ctokfiles() {
> >     # Transform [Capital][Capital][Small] to [Capital]-[Capital][Small]
> >     zmv -Q '(**/)(*[A-Z][A-Z][a-z]*)(.adoc|.txt)'
> '$1${2//(#b)([A-Z])([A-Z][a-z])/$match[1]-$match[2]}$3'
> >
> >     # Put - Between [Small][Capital]
> >     zmv -Q '(**/)(*[a-z][A-Z]*)(.adoc|.txt)'
> '$1${2//(#b)([a-z])([A-Z])/$match[1]-$match[2]}$3'
> >
> >     # Change [Capital][Small] to Lovercase
> >     zmv -Q '(**/)(*[A-Z][a-z]*)(.adoc|.txt)'
> '$1${2//(#m)[A-Z][a-z]/${(L)MATCH}}$3'
> > }
> >
> > So, IF the input name is "ThisIsMyOCDTalking", it becomes
> > "this-is-my-OCD-talking".
> >
> > Now I want to rename directories, adoc & txt files only. For
> directories, I
> > think I have to use
> >
> >     zmv -Q '(**/)(*[A-Z][A-Z][a-z]*)(/)'
> >
> > How to make a function that will work on adoc, txt and directories. I
> tried
> > (/|.adoc|.txt), apparently not working.
> >
>
> Consider how in «*foo*(bar)», the «foo» are matched against the
> filename but the «bar» are parsed as glob qualifiers.  You can't just
> juxtapose them within the same set of parentheses; they're apples and
> oranges.
>
> I don't see a good solution for "Everything in «**/*» that's
> a directory or named *.foo or *.bar".  I'd consider find(1) for this.
>
> > One more thing, is there any way I can reduce the steps in this
> functions.
>
> As a rule, I wouldn't recommend reducing steps in functions in the
> first place, unless you're coding for sport rather than robustness — in
> which case, I'd probably opt for Perl:
>
> % print -rNC1 -- *.(adoc|txt)(N) *(/N) | rename -0 -n '$_ = join "-", map
> { /[a-z]/ ? lc : $_ } split /(?<=[a-z])(?=[A-Z])|(?=[A-Z][a-z])/'
> rename(ThisIsMyOCDTalking.adoc, this-is-my-OCD-talking.adoc)
> %
>
> The main algorithmic difference is splitting the filename into an array
> on zero-width lookaround matches.  I don't think there's a native zsh
> equivalent of this.
>
> Note that changing «print -rNC1» to «ls» would introduce two separate bugs.
>
> I'm not sure how to extend this to nested hierarchies, given the
> possibility of foo/bar where both foo and bar have to be changed.
> Perhaps with «rename -d» and ensuring the input is sorted children
> before their parents.
>
> Cheers,
>
> Daniel
>

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