Beware that `set -e`/errexit has quite a few pitfalls.

For example, it's automatically disabled in compound commands that are followed by AND-OR command chains.

This can especially bite you if you define a function which you use as a single command. The function's behavior changes based on what you call after it, masking errors that occurred inside it.

  $ myfunc()(set -e; echo "BEFORE ERROR"; false; echo "AFTER ERROR")
  
  $ myfunc
  BEFORE ERROR
  
  $ myfunc || echo "REPORT ERROR!"
  BEFORE ERROR
  AFTER ERROR

  $ (set -euo pipefail; x="$(echo A; false; echo B)"; echo "$x")
  A
  B

  $ (set -euo pipefail; x="$(echo A; false; echo B; false)"; echo "$x")
  <no output>

And Gods help you if you want to combine that with the `local` keyword, which also masks subshell return values:

  $ f()(set -euo pipefail; local x="$(echo A; false; echo B; false)"; echo "$x"); f
  A
  B

  $ f()(set -euo pipefail; local x; x="$(echo A; false; echo B; false)"; echo "$x"); f
  <no output>