root/bin/in_place @ 8726
| 1 | 8706 | aaronmk | #!/bin/sh -e
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| 2 | 349 | aaronmk | # Runs a stream command on a file
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| 3 | # Usage: self file command
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| 4 | |||
| 5 | file="$1" |
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| 6 | shift
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| 7 | |||
| 8 | 8707 | aaronmk | test "$#" -ge 1 || exit 0 # no command to run |
| 9 | |||
| 10 | 349 | aaronmk | temp="$(tempfile)" |
| 11 | 3755 | aaronmk | onExit () { rm -f "$temp"; } |
| 12 | trap onExit EXIT
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| 13 | 349 | aaronmk | |
| 14 | 8706 | aaronmk | "$@" <"$file" >"$temp" # exits on error so file not updated |
| 15 | 349 | aaronmk | diff "$file" "$temp" >/dev/null && exit # don't update file if no change |
| 16 | mv "$temp" "$file" |