Small help for basic usage from Yq 3 to 4

[jmcwork]

Hello,

Yq in version 3 is really a practical tool. I have a fairly basic use which release 3 but is a bit more complicated in release 4.

Also I propose this small script that ilustrate basic usage with variable in release 4

Regards

#!/bin/bash
##########################
# yq used flags

#-i == replace inplace sample.yml
#-e == return code (test usage)



#Build sample

echo "Create sample.yml with admin user"

cat <<EOF > sample.yml
security:
  users:
    admin:
      plaintext: adminPass
      htpasswd: adminApachePass
EOF

echo "--------------------------"
cat sample.yml
echo "--------------------------"

### # WRITE ADD/REPLACE with variable

# new user
user=test
testPass=testPass
htpasswd=testApachePass

echo "ADD TEST"

# add user test with 2 key
k=$user v=$testPass yq eval '.security.users.[env(k)].plaintext = env(v)' -i sample.yml
k=$user v=$htpasswd yq eval '.security.users.[env(k)].htpasswd = env(v)' -i sample.yml

echo "--------------------------"
cat sample.yml
echo "--------------------------"


### UPDATE TEST
echo "UPDATE TEST"

user=test
testPass=testPassUpdated
htpasswd=testApachePassUpdated

# add user test with 2 key
k=$user v=$testPass yq eval '.security.users.[env(k)].plaintext = env(v)' -i sample.yml
k=$user v=$htpasswd yq eval '.security.users.[env(k)].htpasswd = env(v)' -i sample.yml

echo "--------------------------"
cat sample.yml
echo "--------------------------"


### GET value with variable
echo "GET TESTS"

user=test

echo -n "security.users.$user.plaintext -->  "
k=$user yq eval '.security.users.[env(k)].plaintext' sample.yml

r=$(k=$user yq eval '.security.users.[env(k)].htpasswd' sample.yml )
echo "security.users.$user.plaintext --> $r"

echo "--------------------------"


###
# TEST
echo "CONDITIONAL TEST Usage"
echo "--------------------------"

# test KEY exist (KEY from variable)
# V4 k=$user yq eval -e '.security.users.[env(k)]' sample.yml

user=admin
echo "Test if key $user exist"

# sample code to test key with variable
if k=$user yq eval -e '.security.users.[env(k)]' sample.yml &>/dev/null ; then
  echo "Exist ($user)"
else
  echo "Not Exist ($user)"
fi

echo "--------------------------"
# TEST key not exist

user=baduser
echo "Test if $user exist"
k=$user yq eval -e '.security.users.[env(k)]' sample.yml &>/dev/null
echo $? 
# --> 1

echo "--------------------------"

# TEST key exist

user=admin

echo "Test if $user exist"
k=$user yq eval -e '.security.users.[env(k)]' sample.yml &>/dev/null
echo $?
# ---> 0