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Ryan P.C. McQuen committed Jan 1, 2015
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## (slackware already has jpegtran,
## although it will check for the mozjpeg version)

## prepend imgult on the command line with
## BACKUPIMAGES=true (to back everything up)
## EXIFREMOVE=n (to keep EXIF data)
BACKUPIMAGES=${BACKUPIMAGES:-false}
EXIFREMOVE=${EXIFREMOVE:-true}

## fancy syntax thanks to B. Watson
OPTLEVEL=${1:-90}

if [ "$EXIFREMOVE" = "true" ]; then
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