Is there a way to create an associative array from a text file in bash? [duplicate] - bash

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bash4 read file into associative array
(1 answer)
Closed 3 years ago.
I'm currently creating a list of commands so for example by saying "directory install plugin-name" I can install all needed plugins specified in an external list. This list is just a txt file with all plugin names. But I'm struggling getting all names in an associative array.
I've tried this one:
while IFS=";" read line;
do " communtyList[ $line ]=1 " ;
done < community-list.txt;
The desired output should be
communityList[test1]=1
communityList[test2]=1....
It need to be an associative array because I want to access it by words and not by index. This word will be implemented as parameters/arguments.
For example "install plugin" instead of "1 plugin"
So I can ask for example this way:
if [ ! -z "${!communtyList[$2]}" ];
Update, here the whole code:
#!/usr/bin/env bash
community(){
declare -A communtyList
while IFS= read line;
do communtyList[$line]=1 ;
done < community-list.txt;
# communtyList[test1]=1
# communtyList[test2]=1
# communtyList[test3]=1
# communtyList[test4]=1
if { [ $1 = 'install' ] || [ $1 = 'activate' ] || [ $1 = 'uninstall' ] || [ $1 = 'deactivate' ] ; } && [ ! -z $2 ] ; then
if [ $2 = 'all' ];
then echo "$1 all community plugins....";
while IFS= read -r line; do echo "$1 $line "; done < community-list.txt;
elif [ ! -z "${!communtyList[$2]}" ];
then echo "$1 community plugin '$2'....";
else
echo -e "\033[0;31m Something went wrong";
echo " Plugin '$2' does not exist.";
echo " Here a list of all available community plugins: ";
echo ${!communtyList[#]}
echo -e " \e[m"
fi
else
echo -e "\033[0;31m Something went wrong";
if [ -z $2 ];
then echo -e "[Plugin name] required. [community][action][plugin name] \e[m"
else
echo " Action '$1' does not exist.";
echo -e " Do you mean some of this? \n install \n activate \n uninstall \e[m"
fi
fi
echo ${!communtyList[#]}
}
"$#"

Answer 1

To use asociative array you have to declare it first
declare -A communityList
Then you can add values
communityList[test1]=1
communityList[test2]=2
...
Or with the declaration
declare -A communityList=(
communityList[test1]=1
communityList[test2]=2
...
)

Answer 2

The quotes around " communtyList[ $line ]=1 " mean you try to evaluate a command whose first character is a space. You want to take out those quotes, and probably put quotes around "$line" instead.
It's also unclear why you have IFS=";" -- you are not splitting the line into fields anyway, so this is not doing anything useful. Are there semicolons in your input file? Where and why; what do they mean?
You should probably prefer read -r unless you specifically require read to do odd things with backslashes in the input.
Finally, as suggested by Ivan, you have to declare the array's type as associative before you try to use it.
With those things out of the way, try
declare -A communityList
while read -r line; do
communtyList["$line"]=1
done < community-list.txt