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#!/bin/bash
#
# This script checks if the current version (HEAD) is an official release.
# If so, the program returns with an exit code of 0 (True).  If it is not a
# release, the program returns an exit code other than 0 (False).
#
# HEAD is an official release if there exists a tag that points to it and
# that is signed by the release manager's key.
#

if [ ! -z "$EMC2_HOME" ]; then
    source $EMC2_HOME/scripts/githelper.sh
else
    if [ ! -d debian -o ! -d src ]; then
        echo "this script must be run from the root of the source tree (the directory with debian and src in it)"
        exit 1
    fi
    source scripts/githelper.sh
fi

githelper $1
if [ -z "$GIT_TAG" ]; then
    # no signed tags found
    echo "no"
    exit 1
fi

TAGGED_REV=$(git rev-parse $GIT_TAG^{commit})
HEAD_REV=$(git rev-parse HEAD)

if [ "$TAGGED_REV" == "$HEAD_REV" ]; then
    echo "yes"
    exit 0
fi

echo "no"
exit 1