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#!/bin/bash -e
exec_pretty() {
# The output of this command must be stable (and `jq` and python
# fallback must generate the same output.
if command -v jq &>/dev/null ; then
# If we have, use `jq`
exec jq
fi
# Fallback to python.
exec python -c '
import json
import sys
parsed = json.load(sys.stdin)
print(json.dumps(parsed, indent=2))
'
}
[ "$#" -le 1 ] || { echo "At most one argument supported" ; exit 1 ; }
if [ "$#" -eq 1 ] ; then
# One argument passed. This must be a JSON file.
[ -f "$1" ] || { echo "File \"$1\" does not exist" ; exit 1 ; }
exec_pretty < "$1"
fi
exec_pretty
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