Branch/tag all projects with a single commit in release-tagging script.

[jyknight]

Summary

This change updates the release script to use svnmucc to create all
the branches with one commit.

This will ensure that the git tag won't bounce around if the git
migration runs in-between separate commits creating a branch.

Additionally, update the list of projects to include all of the
projects in the monorepo, plus test-suite.

[hans]

Looks good to me, thanks!

+Tom fyi too

[jyknight]

Also remove and recreate the branch in a single commit if using
--rebranch.

[hans]

Still lgtm.

llvm/utils/release/tag.sh

-#!/bin/sh
+#!/bin/bash
 #===-- 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"
+# All the projects that make it into the monorepo, plus test-suite.
+projects="monorepo-root cfe clang-tools-extra compiler-rt debuginfo-tests libclc libcxx libcxxabi libunwind lld lldb llgo llvm openmp parallel-libs polly pstl test-suite"
 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() {
+    local remove_args=()
+    local create_args=()
+    local message_prefix
     set -x
-    for proj in  $projects; do
+    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_$branch_release
+            remove_args+=(rm "$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
+        create_args+=(cp ${revision} "$proj/trunk" "$proj/branches/release_$branch_release")
     done
+    if [[ ${#remove_args[@]} -gt 0 ]]; then
+        message_prefix="Removing and recreating"
+    else
+        message_prefix="Creating"
+    fi
+    if [[ ${#create_args[@]} -gt 0 ]]; then
+        ${dryrun} svnmucc --root-url "$base_url" \
+            -m "$message_prefix release_$branch_release branch off revision ${revision}" \
+            "${remove_args[@]}" "${create_args[@]}"
+    fi
     set +x
 }
 
 tag_release_candidate() {
+    local create_args=()
     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_$tag_release
+            create_args+=(mkdir "$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
+            create_args+=(cp HEAD
+                          "$proj/branches/release_$branch_release"
+                          "$proj/tags/RELEASE_$tag_release/$rc")
         fi
     done
+    if [[ ${#create_args[@]} -gt 0 ]]; then
+        ${dryrun} svnmucc --root-url "$base_url" \
+            -m "Creating release candidate $rc from release_$tag_release branch" \
+            "${create_args[@]}"
+    fi
     set +x
 }
 
 while [ $# -gt 0 ]; do
     case $1 in
         -release | --release )
             shift
             release=$1
case $1 in
             echo "unknown option: $1"
             usage
             exit 1
             ;;
     esac
     shift
 done
 
-if [ "x$release" = "x" ]; then
+if [ "$release" = "" ]; 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$rc" = "x" ]; then
+if [ "$rc" = "" ]; 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