Add bump-versions script

scripts/bump-versions.sh

@@ -0,0 +1,78 @@
+#!/bin/bash -
+#===============================================================================
+#
+#          FILE: bump-versions.sh
+#
+#         USAGE: ./bump-versions.sh
+#
+#   DESCRIPTION: Bump the versions for all servant packages
+#
+#       OPTIONS: See usage
+#  REQUIREMENTS: bumper, bash >= 4
+#       CREATED: 11.05.2015 21:36
+#      REVISION:  ---
+#===============================================================================
+
+set -o nounset
+set -o errexit
+
+DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
+DRY_RUN=false
+POSITION="none"
+SOURCES_TXT="$( dirname $DIR)/sources.txt"
+
+declare -a SOURCES
+readarray -t SOURCES < "$SOURCES_TXT"
+
+usage () {
+    echo " bump-versions <POSITION> [-d|--dry-run]"
+    echo "             | [-h|--help]"
+    echo "    Bumps the specified positional version of all servant packages."
+    echo "    POSITION is a number between 0 and 3, inclusive."
+    exit 0
+}
+
+join () { local IFS="$1"; shift; echo "$*"; }
+
+versions_equal () {
+    local NUM=$(find . -name 'servant*.cabal' | xargs grep "^version:" | awk '{ print $2 }' | uniq -c | wc -l)
+    if [ 1 -eq $NUM ] ; then
+        return 0
+    else
+        echo "versions of packages are not all the same!" && exit 1
+    fi
+}
+
+if [ $# -eq 0 ] ; then
+    echo "expecting one or more arguments. Got 0"
+    usage
+elif [ $# -gt 2 ] ; then
+    echo "expecting one or more arguments"
+    usage
+fi
+
+versions_equal
+
+while [ "${1:-unset}" != "unset" ] ; do
+    case "$1" in
+        -h | --help) usage ;;
+        -d | --dry-run) DRY_RUN=true
+           shift ;;
+        0) if POSITION="none" ; then POSITION=0 ; else usage ; fi
+           shift ;;
+        1) if POSITION="none" ; then POSITION=1 ; else usage ; fi
+           shift ;;
+        2) if POSITION="none" ; then POSITION=2 ; else usage ; fi
+           shift ;;
+        3) if POSITION="none" ; then POSITION=3 ; else usage ; fi
+           shift ;;
+        *) usage ;;
+   esac
+done
+
+if $DRY_RUN ; then
+   bumper --dry-run -"$POSITION" $(join , "${SOURCES[@]}")
+else
+   bumper -"$POSITION" $(join , "${SOURCES[@]}")
+fi
+