How can I nest operations in bash? e.g I know that
$(basename $var)
will give me just the final part of the path and
${name%.*}
gives me everything before the extension.
How do I combine these two calls, I want to do something like:
${$(basename $var)%.*}
As @sid-m 's answer states, you need to change the order of the two expansions because one of them (the % stuff) can only be applied to variables (by giving their name):
echo "$(basename "${var%.*}")"
Other things to mention:
basename can strip that off for you as well: basename "$var" .txt (This will print foo for foo.txt in $var.)You can do it like
echo $(basename ${var%.*})
it is just the order that needs to be changed.
Assuming you want to split the file name, here is a simple pattern :
$ var=/some/folder/with/file.ext
$ echo $(basename $var) | cut -d "." -f1
file
If you know the file extension in advance, you can tell basename to remove it, either as a second argument or via the -s option. Both these yield the same:
basename "${var}" .extension
basename -s .extension "${var}"
If you don't know the file extension in advance, you can try to grep the proper part of the string.
### grep any non-slash followed by anything ending in dot and non-slash
grep -oP '[^/]*(?=\.[^/]*$)' <<< "${var}"
basename.