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# vim:ft=sh:noexpandtab
# Clever diff function
# TODO directory diff
# This function does diff and reports changes on debug level
# First and second arguments have to be paths to compared files and third argument
# have to be a debug message prepended string.
# It exits with nonzero exit code if there is no difference.
do_diff() {
if [ ! -f "$1" ]; then
echo_error "No reference file to compare to: $1"
return 1 # We pretend that there is no change as reference file is missing
fi
if [ ! -f "$2" ]; then
echo_dbg "$3: No target file"
return 0
fi
# Do real diff if both files exists
local DIFF="$(diff --suppress-common-lines -ay "$1" "$2")"
if [ -n "$DIFF" ]; then
echo_dbg "$3:
$DIFF"
else
return 1
fi
}
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