#!/bin/sh ############################################################################### # BRLTTY - A background process providing access to the console screen (when in # text mode) for a blind person using a refreshable braille display. # # Copyright (C) 1995-2019 by The BRLTTY Developers. # # BRLTTY comes with ABSOLUTELY NO WARRANTY. # # This is free software, placed under the terms of the # GNU Lesser General Public License, as published by the Free Software # Foundation; either version 2.1 of the License, or (at your option) any # later version. Please see the file LICENSE-LGPL for details. # # Web Page: http://brltty.app/ # # This software is maintained by Dave Mielke . ############################################################################### . "`dirname "${0}"`/prologue.sh" addProgramOption d string.anything defaultIdentifier "the default revision identifier" addProgramOption f string.file outputFile "the file in which to write the revision identifier" "standard output" addProgramOption i flag asInteger "render the revision identifier as a 32-bit integer" addProgramOption r string.anything revisionIdentifier "the revision identifier" addProgramOption s flag asString "render the revision identifier as a quoted string" addProgramParameter source sourceRoot "the top-level directory of the source tree" parseProgramArguments "${@}" [ -e "${sourceRoot}" ] || semanticError "directory not found: ${sourceRoot}" [ -d "${sourceRoot}" ] || semanticError "not a directory: ${sourceRoot}" export GIT_WORK_TREE="${sourceRoot}" export GIT_DIR="${GIT_WORK_TREE}/.git" [ -n "${revisionIdentifier}" ] || { if [ -d "${GIT_DIR}" -o -f "${GIT_DIR}" ] then revisionIdentifier="`git describe --tags --abbrev=8 --dirty='M' --match='BRLTTY-*' 2>/dev/null`" elif [ -d "${sourceRoot}/.svn" ] then revisionIdentifier="`svnversion -n "${sourceRoot}" 2>/dev/null`" [ "${revisionIdentifier}" != "exported" ] || revisionIdentifier="" else logMessage warning "unrecognized source repository type: ${sourceRoot}" fi } [ -n "${revisionIdentifier}" ] || { [ -n "${defaultIdentifier}" ] || semanticError "revision identifier not known" revisionIdentifier="${defaultIdentifier}" } "${asInteger}" && { makeInteger() { set -- `echo "${revisionIdentifier}" | sed -e 's/-/ /g'` local commitCount="${3:-0}" revisionIdentifier=0 local width=6 local shift=30 local number for number in `echo "${2}" | sed -e 's/\./ /g'` do shift=$((shift - width)) revisionIdentifier=$((revisionIdentifier | (number << shift))) done revisionIdentifier=$((revisionIdentifier | commitCount)) } makeInteger } "${asString}" && revisionIdentifier='"'"${revisionIdentifier}"'"' if [ -z "${outputFile}" ] then echo "${revisionIdentifier}" else if [ -e "${outputFile}" ] then [ -f "${outputFile}" ] || semanticError "not a file: ${outputFile}" [ -r "${outputFile}" ] || semanticError "file not readable: ${outputFile}" exec 3<"${outputFile}" read <&3 -r firstLine && { [ "${firstLine}" != "${revisionIdentifier}" ] || read <&3 -r secondLine || exit 0 } exec 3<&- [ -w "${outputFile}" ] || semanticError "file not writable: ${outputFile}" else outputDirectory="$(dirname "${outputFile}")" [ -d "${outputDirectory}" ] || semanticError "not a directory: ${outputDirectory}" [ -w "${outputDirectory}" ] || semanticError "directory not writable: ${outputDirectory}" fi echo "${revisionIdentifier}" >"${outputFile}" fi exit 0