Setting envs or globals in bash script [NOT A duplicate] - mysql

Question

I'm looking for a way (preferably cross-platform compatible) to set something globally accessible from a bash script.
My company is using a bash script to request access credentials to a mysql database. This returns username, password and db domain that I end up having to copy paste in my terminal to run and connect to our mysql db.
I thought i'd amend the script to set environment variables and make use of these in an alias with the credentials set in my bashrc but turns out you can't set environment variables in a bash script.
So i tried to set the mysql alias with the username password and domain pre-filled in that same script but same issue. Can't set an alias in a bash script.
I essentially want to be able to run the script that gives me the credentials and then not have to do manual copy pasting all over the place.
What I tried was (if it give more context):
#!/bin/bash
# Script gets the credentials
# Script now has username, password, endpoint variables
export MYSQL_USER=$username
export MYSQL_PASSWORD=$password
export MYSQL_ENDPOINT=$endpoint
# Script finishes
and in my bashrc:
alias mysqlenv="mysql -h $MYSQL_ENDPOINT -u $MYSQL_USER -p'$MYSQL_PASSWORD'"
I appreciate this is not working and that might not be the best solution so i'm open to other options.
PS: Forgot to mention the credentials expire every 24H which is why i want to smoothen the process
PS2: I can't source the script that gives me the credentials because it's not just exporting environment variables, it's taking params from the cli and getting me to log in to my company system on my browser, etc.
PS3: I know putting password for mysql on the command line is bad practice but this is a non-issue as that password is being printed there in the first place by the script that give me the credential (written by someone else in the company)

Answer 1

Since you can already parse the credentials, I'd use your awk code to output shell commands:
getMysqlCredentials() {
credential_script.sh | awk '
{parse the output}
END {
printf "local MYSQL_USER=\"%s\"\n", username
printf "local MYSQL_PASSWORD=\"%s\"\n", password
printf "local MYSQL_ENDPOINT=\"%s\"\n", endpoint
}
'
}
then, I'd have a wrapper function around mysql where you invoke that function and source the output
mysql() {
source <(getMysqlCredentials)
command mysql -h "$MYSQL_ENDPOINT" -u "$MYSQL_USER" -p"$MYSQL_PASSWORD" "$#"
}