#!/bin/sh
#

refname="$1"
oldrev="$2"
newrev="$3"

# Safety check
if [ -z "$GIT_DIR" ]; then
        echo "Don't run this script from the command line." >&2
        echo " (if you want, you could supply GIT_DIR then run" >&2
        echo "  $0 <ref> <oldrev> <newrev>)" >&2
        exit 1
fi

if [ -z "$refname" -o -z "$oldrev" -o -z "$newrev" ]; then
        echo "usage: $0 <ref> <oldrev> <newrev>" >&2
        exit 1
fi

# Check types
# if $newrev is 0000...0000, it's a commit to delete a ref.
zero=$(git hash-object --stdin </dev/null | tr '[0-9a-f]' '0')
if [ "$newrev" = "$zero" ]; then
        newrev_type=delete
else
        newrev_type=$(git cat-file -t $newrev)
fi

echo "Hi from Soft Serve update hook!"
echo "$GITDIR"
echo "RefName: $refname"
echo "Change Type: $newrev_type"
echo "Old SHA1: $oldrev"
echo "New SHA1: $newrev"

exit 0