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Commit 82b6e848 authored by Sasha Smundak's avatar Sasha Smundak
Browse files

A script to update the file contents with the command output. 

Used to avoid rerunning Ninja files regeneration if m2rbc conversion
generated the same makefile.

Test: treehugger
Change-Id: I1b0a619f961e6d2c7bf99a48053ecb58147c6db0
parent f18bedf1

scripts/update_out

0 → 100755
+21 −0
Original line number Diff line number Diff line 
#! /bin/bash

# Run given command application and update the contents of a given file.

# Will not change the file if its contents has not changed.

[[ $# -gt 1 ]] || { echo "Usage: ${0##*/} FILE COMMAND" >&2; exit 1; }

set -u

declare -r outfile="$1"

shift

if [[ ! -f $outfile ]]; then

	$@ >$outfile

	exit

fi



declare -r newout=${outfile}.new

$@ >$newout

rc=$?

if cmp -s $newout $outfile; then

	rm $newout

else

	mv -f $newout $outfile

fi

exit $rc