bash alias command with both single and double quotes
LinuxBashQuotesDouble QuotesLinux Problem Overview
I have this command that does what I want but I can't get to alias it in my .bashrc (note that it uses both single and double quotes):
svn status | awk '$1 =="M"{print $2;}'
I've tried:
alias xx="svn status | awk '$1 ==\"M\"{print $2;}'"
And some other common sense combinations with no luck.. I know that bash is very picky with quotes.. So what's the correct way to alias it and why ? Thanks
Linux Solutions
Solution 1 - Linux
You just need to escape it correctly.
alias xxx="svn status | awk '\$1 ==\"M\"{print \$2;}'"
Solution 2 - Linux
Here's something that accomplishes the same thing without using an alias. Put it in a function in your .bashrc:
xx() {
svn status | awk '$1 =="M"{print $2;}'
}
This way you don't have to worry about getting the quotes just right. This uses the exact same syntax you would at the command line.
Solution 3 - Linux
Since Bash 2.04 there is a third (easier) way beside using a function or escaping the way @ffledgling did: using string literal syntax (here is an excellent answer).
So for example if you want to make an alias of this onliner it will end up being:
alias snap-removedisabled=$'snap list --all | awk \'$5~"disabled"{print $1" --revision "$3}\' | xargs -rn3 snap remove'
So you just have to add the $
in front of the string and escape the single quotes.
This brings a shellcheck warning you could probably safely disable with # shellcheck disable=SC2139
.
Solution 4 - Linux
You can revert the double and simple quotations, so that double quotations are outside of single quotations.
For example, this does not work:
alias docker-table='docker ps --format "table {{.ID}}\t{{.Image}}\t{{.Status}}"'
But this works:
alias docker-table="docker ps --format 'table {{.ID}}\t{{.Image}}\t{{.Status}}'"
And when you check the actual alias interpreted, you can see the inner quotations are actually escaped.
$ alias docker-table
alias docker-table='docker ps --format '\''table {{.ID}}\t{{.Image}}\t{{.Status}}'\'''