I'm looking at a shell script that contains the following:
set +e
set -x
I see that the commands are used to "assign a value to a shell variable". But in this context I don't understand the usage.
I'm looking at a shell script that contains the following:
set +e
set -x
I see that the commands are used to "assign a value to a shell variable". But in this context I don't understand the usage.
That style of set command sets or unsets shell options. Confusingly -
sets the option and +
unsets the option.
option e
makes the shell script error out whenever a command errors out. It's generally a good idea to have it enabled most of the time.
option x
makes the shell print out commands after expanding their parameters but before executing them. Useful when debugging but can get overwhelming sometimes.
See https://www.gnu.org/software/bash/manual/html_node/The-Set-Builtin.html for more (that documentation is for bash but many of the features are common across many shells)