bash - normalize path

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#!/bin/bash

input_path="/path/to/directory/../file"
output_path="$(cd "$input_path" 2> /dev/null && pwd || echo -n)"

echo "$output_path"


# Output:
#
#     /path/to/file

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#!/bin/bash

input_path="/path/to/directory/../file"
output_path="$(realpath "$input_path")"

echo "$output_path"


# Output:
#
#     /path/to/file

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output_path="$(cd "$input_path" 2> /dev/null && pwd || echo -n)"

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output_path="$(realpath "$input_path")"