Replace environment variable references in a file.
Download the script, make it executable,
and put it in your PATH.
You can also source the script and use as it a bash function, avoiding the need to export variables.
replacevars [-t] ( -f file | -i file | - ) [ldelim] [rdelim]
Where:
-tprints variables in the input in the order they appear, and exits (for testing)-fgets input from a file and prints the result tostdout-igets input from a file and overwrites it with the result-gets input fromstdinand prints the result tostdoutldelimis the left delimiter for variable references (default is{{)rdelimis the right delimiter for variable references (default is}})
command> echo "Hi {{first}} {{last}}" | replacevars -
stderr> Undefined variable: first
command> echo "Hi {{first}} {{last}}" | first=Some last=Person replacevars -
stdout> Hi Some Person
file> Hi ${first} ${last}
command> first=Some last=Person replacevars -f file '${' '}'
stdout> Hi Some Person
file> Hi {{first}} {{last}}
command> first=Some last=Person replacevars -i file
file> Hi Some Person
stdout> 2 variables replaced in file
file> Hi Some Person
command> first=Some last=Person replacevars -i file
file> Hi Some Person
stdout> 0 variables replaced in file