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#!/bin/sh
#===-- tag.sh - Tag the LLVM release candidates ----------------------------===#
#
#                     The LLVM Compiler Infrastructure
#
# This file is distributed under the University of Illinois Open Source
# License.
#
#===------------------------------------------------------------------------===#
#
# Create branches and release candidates for the LLVM release.
#
#===------------------------------------------------------------------------===#

set -e

release=""
rc=""
rebranch="no"
projects="llvm cfe test-suite compiler-rt libcxx libcxxabi clang-tools-extra polly lldb lld openmp libunwind debuginfo-tests"
dryrun=""
revision="HEAD"

base_url="https://llvm.org/svn/llvm-project"

usage() {
    echo "usage: `basename $0` -release <num> [-rebranch] [-revision <num>] [-dry-run]"
    echo "usage: `basename $0` -release <num> -rc <num> [-dry-run]"
    echo " "
    echo "  -release <num>   The version number of the release"
    echo "  -rc <num>        The release candidate number"
    echo "  -rebranch        Remove existing branch, if present, before branching"
    echo "  -final           Tag final release candidate"
    echo "  -revision <num>  Revision to branch off (default: HEAD)"
    echo "  -dry-run         Make no changes to the repository, just print the commands"
}

tag_version() {
    set -x
    for proj in  $projects; do
        if svn ls $base_url/$proj/branches/release_$branch_release > /dev/null 2>&1 ; then
            if [ $rebranch = "no" ]; then
                continue
            fi
            ${dryrun} svn remove -m "Removing old release_$branch_release branch for rebranching." \
                $base_url/$proj/branches/release_$branch_release
        fi
        ${dryrun} svn copy -m "Creating release_$branch_release branch off revision ${revision}" \
            -r ${revision} \
            $base_url/$proj/trunk \
            $base_url/$proj/branches/release_$branch_release
    done
    set +x
}

tag_release_candidate() {
    set -x
    for proj in $projects ; do
        if ! svn ls $base_url/$proj/tags/RELEASE_$tag_release > /dev/null 2>&1 ; then
            ${dryrun} svn mkdir -m "Creating release directory for release_$tag_release." $base_url/$proj/tags/RELEASE_$tag_release
        fi
        if ! svn ls $base_url/$proj/tags/RELEASE_$tag_release/$rc > /dev/null 2>&1 ; then
            ${dryrun} svn copy -m "Creating release candidate $rc from release_$tag_release branch" \
                $base_url/$proj/branches/release_$branch_release \
                $base_url/$proj/tags/RELEASE_$tag_release/$rc
        fi
    done
    set +x
}

while [ $# -gt 0 ]; do
    case $1 in
        -release | --release )
            shift
            release=$1
            ;;
        -rc | --rc )
            shift
            rc="rc$1"
            ;;
        -rebranch | --rebranch )
            rebranch="yes"
            ;;
        -final | --final )
            rc="final"
            ;;
        -revision | --revision )
            shift
            revision="$1"
            ;;
        -dry-run | --dry-run )
            dryrun="echo"
            ;;
        -h | --help | -help )
            usage
            exit 0
            ;;
        * )
            echo "unknown option: $1"
            usage
            exit 1
            ;;
    esac
    shift
done

if [ "x$release" = "x" ]; then
    echo "error: need to specify a release version"
    echo
    usage
    exit 1
fi

branch_release=`echo $release | sed -e 's,\([0-9]*\.[0-9]*\).*,\1,' | sed -e 's,\.,,g'`
tag_release=`echo $release | sed -e 's,\.,,g'`

if [ "x$rc" = "x" ]; then
    tag_version
else
    if [ "$revision" != "HEAD" ]; then
        echo "error: cannot use -revision with -rc"
        echo
        usage
        exit 1
    fi

    tag_release_candidate
fi

exit 0