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#!/bin/sh
#
# Copyright (c) 2013 Nagios Plugins Development Team
#
# Originally written by Holger Weiss <holger@zedat.fu-berlin.de>.
#
# This file is free software; the Nagios Plugins Development Team gives
# unlimited permission to copy and/or distribute it, with or without
# modifications, as long as this notice is preserved.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY, to the extent permitted by law; without even the implied
# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
set -e
set -u
export PATH='/usr/local/bin:/usr/local/sbin:/bin:/sbin:/usr/bin:/usr/sbin'
temp_prefix='/run/shm'
forty_zeros=$(printf '%.40d' 0)
myself=${0##*/}
check_refs()
{
turn=$1
temp_dir=$2
git show-ref | while read object ref
do
ref_dir="$temp_dir/${ref%/*}"
ref_file="$temp_dir/$ref"
if [ $turn -eq 2 -a -f "$ref_file" ] \
&& grep "^1 $object$" "$ref_file" >'/dev/null'
then # The ref has not been modified.
rm -f "$ref_file"
else
mkdir -p "$ref_dir"
echo "$turn $object" >>"$ref_file"
fi
done
}
if [ $# -lt 1 ]
then
echo >&2 "Usage: $myself <repository> ..."
exit 2
fi
temp_dir=$(mktemp -d "$temp_prefix/$myself.XXXXXX")
temp_file=$(mktemp "$temp_prefix/$myself.XXXXXX")
trap 'rm -rf "$temp_dir" "$temp_file"' EXIT
for repository in "$@"
do
hook="$repository/hooks/post-receive"
cd "$repository"
check_refs 1 "$temp_dir"
if ! git remote update --prune >"$temp_file" 2>&1
then
cat >&2 "$temp_file"
exit 1
fi
git fetch --quiet --tags
check_refs 2 "$temp_dir"
if [ -x "$hook" ]
then
find "$temp_dir" -type 'f' -print | while read ref_file
do
ref=${ref_file#$temp_dir/}
old=$(awk '$1 == "1" { print $2; exit }' "$ref_file")
new=$(awk '$1 == "2" { print $2; exit }' "$ref_file")
old=${old:-$fourty_zeros}
new=${new:-$fourty_zeros}
echo "$old" "$new" "$ref"
done >"$temp_file"
test -s "$temp_file" && "$hook" <"$temp_file"
fi
cd "$OLDPWD"
done
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