sha1vdt

#!/bin/bash
# sha1vdt
#
# A quick and dirty script to get the sha1 hash of a file in the upstream directory
# and format it appropriately for inclusion in a .source file.
#
# Usage: sha1vdt <filename>
#
# The filename should be in the upstream directory, i.e. under /p/vdt/public/html/upstream


fail () {
    ret=$1
    shift
    echo "$@" >&2
    exit $ret
}


filename=${1?Need filename}
abs_filename=$(readlink -f "$filename") || fail 1 "Couldn't get absolute path of $filename"

# the absolute path sometimes includes the /afs/cs.wisc.edu prefix; strip that off
short_filename=${abs_filename#/afs/cs.wisc.edu}
short_filename2=${short_filename#/p/vdt/public/html/upstream/}
if [[ $short_filename == $short_filename2 ]]; then
    fail 2 "$filename is not under /p/vdt/public/html/upstream"
fi

set -o pipefail
sha1sum=$(sha1sum "$filename" | awk '{print $1}') || fail 3 "Error getting sha1sum"
printf "%s sha1sum=%s\n" "$short_filename2" "$sha1sum"