[SOLVED] How do I break a long string in jq in a bash command?

Issue

Here's the minimal example:

echo "{\"foo\": \"John\",\"bar\":\"Smith\"}" | jq -r '@sh "export FOO=\(.foo)\nexport BAR=\(.bar) \n"'

And in my real life scenario case that jq selector is really long (think about 10 exports), how can I break them into multiple lines or something? I tried using \ as a separator at the end of the lines but it doesn't work unfortunately.

Solution

This would probably do:

. <(
  jq -r '"export "+(to_entries|map((.key|ascii_upcase)+"="+(.value|@sh))|.[])'\
    <<<'{"foo":"John","bar":"Smith"}'
)

Alternative with one export for all variables:

. <(
  jq -r '
    "export"+(
      to_entries|
        map(
            " " +
            (.key|ascii_upcase) +
            "=" +
            (.value|@sh)
          ) | add
        )
  ' <<<'{"foo":"John","bar":"Smith"}'
)

You may also consider filtering-out replacing characters within .key strings so they are always valid shell variable identifiers.

Answered By - Léa Gris

Answer Checked By - Candace Johnson (WPSolving Volunteer)