I have a directory which contains filenames including IDs in front, e.g:
32.04 Wybrane wzory matematyczne
32.01 Funkcje
31.01 Opracowania lektur EM 2023
The desired filenames after the change would respectively be:
32.04
32.01
31.01
I have other number formats in the directory, such as 30-39, or 31 {filename} so I want to specifically target the files with this floating notation.
The script should run from parent through all its subdirectories.
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autoload zmv
zmv -i '(**/)(<->.<->) *' '$1$2'
-i– interactive mode; can be removed if you are comfortable with the result.(**/)(<->.<->) *– ‘from’ pattern.(**/)– recursive glob. Note that inzsh5.9, the parens are required, even if the component is not referenced in the ‘to’ pattern.<->.<->– since<->is a glob pattern for any number, this will findnumber.number.*– the rest of the filename.
$1$2– ‘to’ pattern.$nis thenthparenthesized expression in the ‘from’ pattern.$1– from(**/), i.e. the directory part of the full filename, with the trailing/. This will be an empty string for files in the current directory.$2– from(<->.<->), the floating-point-like number at the start of the filename.
More about zmv.
More zmv examples.
A longer zmv explanation. The description there covers many of the operators used in a previous version of this answer (zmv '(*/)#<->.<-> *' '${f:h}/${${f:t}%% *}').
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