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#!/bin/sh
##
## Copyright (c) 2015 The WebM project authors. All Rights Reserved.
##
## Use of this source code is governed by a BSD-style license
## that can be found in the LICENSE file in the root of the source
## tree. An additional intellectual property rights grant can be found
## in the file PATENTS. All contributing project authors may
## be found in the AUTHORS file in the root of the source tree.
##
set -e
devnull='> /dev/null 2>&1'
readonly ORIG_PWD="$(pwd)"
elog() {
echo "${0##*/} failed because: $@" 1>&2
}
vlog() {
if [ "${VERBOSE}" = "yes" ]; then
echo "$@"
fi
}
# Terminates script when name of current directory does not match $1.
check_dir() {
current_dir="$(pwd)"
required_dir="$1"
if [ "${current_dir##*/}" != "${required_dir}" ]; then
elog "This script must be run from the ${required_dir} directory."
exit 1
fi
}
# Terminates the script when $1 is not in $PATH. Any arguments required for
# the tool being tested to return a successful exit code can be passed as
# additional arguments.
check_tool() {
tool="$1"
shift
tool_args="$@"
if ! eval "${tool}" ${tool_args} > /dev/null 2>&1; then
elog "${tool} must be in your path."
exit 1
fi
}
# Echoes git describe output for the directory specified by $1 to stdout.
git_describe() {
git_dir="$1"
check_git
echo $(git -C "${git_dir}" describe)
}
# Echoes current git revision for the directory specifed by $1 to stdout.
git_revision() {
git_dir="$1"
check_git
echo $(git -C "${git_dir}" rev-parse HEAD)
}
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