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Co-authored-by: bl-ue <54780737+bl-ue@users.noreply.github.com> Co-authored-by: Starbeamrainbowlabs <sbrl@starbeamrainbowlabs.com>
20 lines
644 B
Markdown
20 lines
644 B
Markdown
# envsubst
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> Substitutes environment variables with their value in shell format strings.
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> Variables to be replaced should be in either `${var}` or `$var` format.
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- Replace environment variables in stdin and output to stdout:
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`echo '{{$HOME}}' | envsubst`
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- Replace environment variables in an input file and output to stdout:
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`envsubst < {{path/to/input_file}}`
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- Replace environment variables in an input file and output to a file:
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`envsubst < {{path/to/input_file}} > {{path/to/output_file}}`
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- Replace environment variables in an input file from a space-separated list:
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`envsubst '{{$USER $SHELL $HOME}}' < {{path/to/input_file}}`
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