Wildcard within quotations

问题

When I do the following:

rmdir /path/to/dir/*.lproj

it works fine.

When I do:

APP_RESOURCES="/path/to/dir"
rmdir "$APP_RESOURCES/*.lproj"

It doesn't work and says it literally looks for a directory named with an astrix-symbol. The wildcard doesn't get interpreted. How can this be made to work within quotations?

回答1:

Expansion is handled by the shell so you will have to write something like this:

APP_RESOURCES="/path/to/dir"
rmdir "${APP_RESOURCES}/"*.lproj

回答2:

No globbing is done inside double quotes. Do

APP_RESOURCES="/path/to/dir"
rmdir "$APP_RESOURCES"/*.lproj

See this [ question ] for some detail.

回答3:

You are quoting your variable expansions, keep doing that. Bad thing is that you try to quote your globbing. For the shell to glob you shouldn't quote:

app_resource="/path/to/dir"
rmdir "$app_resource"/*.lproj

This will however still expand to /path/to/dir/*.lproj in cases where no match is found, consider this:

% app_resource="/path/to/dir"
% echo "$app_resource/something/that/doesnt/exists/"*.abc
/path/to/dir/something/that/doesnt/exists/*.abc

One way around that is to check if the file/directory exists:

app_resource="/path/to/dir"
dir_to_remove="$app_resource/"*.lproj
[ -d "$dir_to_remove" ] && rmdir "$dir_to_remove"

来源：https://stackoverflow.com/questions/37563513/wildcard-within-quotations