I have been using zsh globbing for commands such as:
vim **/filename
vim *.html.erb
and so on, but when I type in something like:
find . -name *mobile*
I get the response:
zsh: no matches found: *mobile*
Why?
find . -name *mobile* # does not work
vs
find . -name '*mobile*' # works
The difference is due to the steps that the shell takes when it parses a line. Normally, the shell expands any wildcards it finds before it runs the command. However, the single quotes mark the argument as being a literal, which means that the shell does not perform wildcard expansion on that argument before running the command.
To demonstrate the difference, suppose you are in a directory with the following files:
$ tree
./
mobile.1
dir/
mobile.2
In the first case, without single quotes, zsh will process as follows:
mobile.1
(because that is the only matching filename in the current directoryfind
, hence:find . -name mobile.1
So find
will only look for files named literally mobile.1
In the second form, with single quotes, the entire glob will be preserved and passed to find
:
find . -name *mobile*
Which means that find will look for any filename containing the string "mobile".
The important thing to note here is that both zsh and find support the same wildcard syntax; by using single quotes, you induce find
to handle the wildcards in this case rather than zsh.