I have the following use case. I need to read from an YAML file using yq v4 PEM keys. It's then important to keep the trailing newlines otherwise a future reading of those PEM keys would miserably fail.

I haven't found a way in Bash to read a PEM from an Yaml file and store it in a variable keeping the trailing newlines.

Naturally if I would use $() Bash would remove the trailing new lines.

Do you have any other idea?

CodePudding user response：

I seriously doubt that you genuinely need to do this (see comments on the question), but using a process substitution to feed input to the read command (configured to expect end-of-input to be signified by a NUL rather than a newline) will work:

IFS='' read -r -d '' input < <(yq ... && printf '\0')

Be sure you check stored contents with echo "$input" or declare -p input, not echo $input. (That's true in the command-substitution case too).