What is the simplest way to remove a trailing slash from each parameter in the '$@' array, so that rsync
copies the directories by name?
rsync -a --exclude='*~' "$@" "$dir"
The title has been changed for clarification. To understand the comments and answer about multiple trailing slashes see the edit history.
You can use the ${parameter%word}
expansion that is detailed here. Here is a simple test script that demonstrates the behavior:
#!/bin/bash
# Call this as:
# ./test.sh one/ two/ three/
#
# Output:
# one two three
echo ${@%/}
This works for me: ${VAR%%+(/)}
As described here http://wiki.bash-hackers.org/syntax/pattern
May need to set the shell option extglob. I can't see it enabled for me but it still works
The accepted answer will trim ONE trailing slash.
One way to trim multiple trailing slashes is like this:
VALUE=/looks/like/a/path///
TRIMMED=$(echo $VALUE | sed 's:/*$::')
echo $VALUE $TRIMMED
Which outputs:
/looks/like/a/path/// /looks/like/a/path
realpath
resolves given path. Among other things it also removes trailing slashes. Use -s
to prevent following simlinks
DIR=/tmp/a///
echo $(realpath -s $DIR)
# output: /tmp/a
In zsh you can use the :a
modifier.
export DIRECTORY='/some//path/name//'
echo "${DIRECTORY:a}"
=> /some/path/name
This acts like realpath
but doesn't fail with missing files/directories as argument.
FYI, I added these two functions to my .bash_profile
based on the answers found on SO. As Chris Johnson said, all answers using ${x%/}
remove only one slash, these functions will do what they say, hope this is useful.
rem_trailing_slash() {
echo $1 | sed 's/\/*$//g'
}
force_trailing_slash() {
echo $(rem_trailing_slash $1)/
}