I have a test.txt file that looks like this:
flask=1.0.1
control=1.0.1
device=1.0.1
Now, I want to create an if statement that if flask=1.0.1, do something and if flash=1.0.1_hotfix do something else.
I tried with grep -iFq but no luck, I am newbie to bash and also to programming.
Can anyone show me a doc that explains how to do so? It's really simple task.
Thank you all!
With bash and if:
source test.txt
if [[ $flask == 1.0.1 ]]; then
echo "do something"
fi
if [[ $flask == 1.0.1_hotfix ]]; then
echo "do something else"
fi
Or with bash and case:
source test.txt
case $flask in
1.0.1)
echo "do something"
;;
1.0.1_hotfix)
echo "do something else"
;;
esac
Or in a denser presentation:
source test.txt
case $flask in
1.0.1) echo "do something" ;;
1.0.1_hotfix) echo "do something else" ;;
esac
test.txt. For this to work, test.txt must be valid shell code and not contain any commands with undesirable side effects.Grep is fine, just notice that flask=1.0.1 is a substring of flask=1.0.1_hotfix, so you need to do full string comparison or check for the string end.
flask=$( grep ^flask= test.txt )
if [ "$flask" == flask=1.0.1 ] ; then
...
elif [ "$flask" == flask=1.0.1_hotfix ] ; then
....
fi
I've understood you correctly?
[root@212-24-57-104 Build]# cat 1
flask=1.0.1
control=1.0.1
device=1.0.1
[root@212-24-57-104 Build]# cat ez.sh
#!/bin/bash
a=( $(cat 1) )
for ver in "${a[@]}"
do
if [ $(echo "${ver}" | awk -F= '{print $NF}') == "1.0.1" ]
then
echo "Do something virh $ver"
else
echo "Do anything else with $ver"
fi
done
a array like this is risky, due to word splitting and filename expansion. This is safer: mapfile -t a < filenameA couple of other options:
use grep to get the value
flask_value=$( grep -oP '^flask=\K.*' test.txt )
case $flask_value in
1.0.1) ... ;;
# etc
esac
iterate over the file with just bash:
while IFS="=" read var value; do
if [[ $var == "flask" ]]; then
case $value in
1.0.1) ... ;;
# etc
esac
fi
done < test.txt
