#! /bin/sh

########################################################################
#
# File:   gcc_release
# Author: Jeffrey Law, Bernd Schmidt, Mark Mitchell
# Date:   2001-05-25
#
# Contents:
#   Script to create a GCC release.
#
# Copyright (c) 2001 Free Software Foundation.
#
# This file is part of GNU CC.
#
# GNU CC is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# GNU CC is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU CC; see the file COPYING.  If not, write to
# the Free Software Foundation, 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
#
########################################################################

########################################################################
# Notes
########################################################################

# Here is an example usage of this script, to create a GCC 3.0.2
# prerelease:
#
#   gcc_release -r 3.0.2
#
# This script will automatically use the head of the release branch
# to generate the release.

########################################################################
# Functions
########################################################################

# Issue the error message given by $1 and exit with a non-zero
# exit code.

error() {
    echo "gcc_release: error: $1"
    exit 1
}

# Issue the informational message given by $1.

inform() {
    echo "gcc_release: $1"
}

# Issue a usage message explaining how to use this script.

usage() {
cat <<EOF
gcc_release     [-d destination]
                [-u username]
		[-r release]
		[-t tag]
		[-p previous-tarball]
		[-s] [-f]
EOF
    exit 1
}

# Change to the directory given by $1.

changedir() {
  cd $1 || \
    error "Could not change directory to $1"
}

# Each of the arguments is a directory name, relative to the top
# of the source tree.  Return another name for that directory, relative
# to the working directory.

adjust_dirs() {
  for x in $@; do
    echo `basename ${SOURCE_DIRECTORY}`/$x
  done
}

# Build the source tree that will be the basis for the release
# in ${WORKING_DIRECTORY}/gcc-${RELEASE}.

build_sources() {
  # If the WORKING_DIRECTORY already exists, do not risk destroying it.
  if [ -r ${WORKING_DIRECTORY} ]; then
    error "\`${WORKING_DIRECTORY}' already exists"
  fi
  # Create the WORKING_DIRECTORY.
  mkdir "${WORKING_DIRECTORY}" \
    || error "Could not create \`${WORKING_DIRECTORY}'"
  changedir "${WORKING_DIRECTORY}"

  # If this is a final release, make sure that the ChangeLogs
  # and version strings are updated.
  if [ ${FINAL} -ne 0 ]; then
    inform "Updating ChangeLogs and version files"

    ${CVS} co -d "`basename ${SOURCE_DIRECTORY}`" \
           -r ${BRANCH} gcc || \
           error "Could not check out release sources"
    for x in `find ${SOURCE_DIRECTORY} -name ChangeLog`; do
      cat - ${x} > ${x}.new <<EOF
`date "+%Y-%m-%d"`  Release Manager

	* GCC ${RELEASE} Released.

EOF
      mv ${x}.new ${x} || \
        error "Could not update ${x}"
      (changedir `dirname ${x}` && \
        ${CVS} ci -m 'Mark ChangeLog' `basename ${x}`) || \
        error "Could not commit ${x}"
    done

    # Update `gcc/version.c'.  There are other version files
    # as well, which should have release status updated.
    for x in gcc/version.c; do 
      y=`basename ${x}`
      (changedir `dirname ${SOURCE_DIRECTORY}/${x}` && \
          sed -e 's|= \".*\"|= \"${RELEASE}\"|g' < ${y} > ${y}.new && \
	  mv ${y}.new ${y} && \
          ${CVS} ci -m 'Update version' ${y}) || \
	  error "Could not update ${x}"
    done
    for x in gcc/f/version.c libf2c/libF77/Version.c \
             libf2c/libI77/Version.c libf2c/libU77/Version.c; do
      y=`basename ${x}`
      (changedir `dirname ${SOURCE_DIRECTORY}/${x}` && \
          sed -e 's/experimental\|prerelease/release/g' < ${y} > ${y}.new && \
	  mv ${y}.new ${y} && \
          ${CVS} ci -m 'Update version' ${y}) || \
	  error "Could not update ${x}"
    done

    # Make sure we tag the sources for a final release.
    TAG="gcc_`echo ${RELEASE} | tr . _`_release"

    rm -rf ${SOURCE_DIRECTORY}
  fi

  # Tag the sources.
  if [ -n "${TAG}" ]; then
    inform "Tagging release sources"
    ${CVS} rtag -r ${BRANCH} ${TAG} gcc || \
      error "Could not tag release sources"
    BRANCH=$TAG
  fi

  # Export the current sources.
  inform "Retrieving release sources"
  ${CVS} \
       export -d "`basename ${SOURCE_DIRECTORY}`" \
       -r ${BRANCH} gcc || \
    error "Could not retrieve release sources"

  # Run gcc_update on them to set up the timestamps nicely.
  changedir "gcc-${RELEASE}"
  contrib/gcc_update --touch

  # Obtain some documentation files from the wwwdocs module.
  inform "Retrieving HTML documentation"
  changedir "${WORKING_DIRECTORY}"
  for x in bugs gnats faq; do
    (${CVS} export -r HEAD wwwdocs/htdocs/${x}.html && \
     cp ${WORKING_DIRECTORY}/wwwdocs/htdocs/${x}.html \
        ${SOURCE_DIRECTORY}) || \
      error "Could not retrieve ${x}.html"
  done

  inform "Generating plain-text documentation from HTML"
  changedir "${SOURCE_DIRECTORY}"
  for file in *.html; do
    newfile=`echo $file | sed -e 's/.html//' | tr "[:lower:]" "[:upper:]"`
    (${ENV} TERM=vt100 lynx -dump $file \
       | sed -e "s#file://localhost`/bin/pwd`\(.*\)#http://gcc.gnu.org\1#g" \
       > $newfile) || \
     error "Could not regenerate documentation"
  done

  # For a prerelease or real release, we need to generate additional
  # files not present in CVS.
  changedir "${SOURCE_DIRECTORY}"
  if [ $SNAPSHOT -ne 1 ]; then
    # Generate the documentation.
    inform "Building install docs"
    SOURCEDIR=${SOURCE_DIRECTORY}/gcc/doc
    DESTDIR=${SOURCE_DIRECTORY}/INSTALL
    export SOURCEDIR
    export DESTDIR
    ${SOURCE_DIRECTORY}/gcc/doc/install.texi2html

    # Regenerate the NEWS file.
    contrib/gennews > gcc/NEWS || \
      error "Could not regenerate NEWS files"

    # Now, we must build the compiler in order to create any generated
    # files that are supposed to go in the source directory.  This is
    # also a good sanity check to make sure that the release builds
    # on at least one platform.
    inform "Building compiler"
    OBJECT_DIRECTORY=../objdir
    contrib/gcc_build -d ${SOURCE_DIRECTORY} -o ${OBJECT_DIRECTORY} build || \
      error "Could not rebuild GCC"

    # Regenerate the Fotran NEWS and BUGS files.
    (cd ${OBJECT_DIRECTORY}/gcc && make f77.rebuilt) || \
      error "Could not regenerate Fortran NEWS and BUGS files"
  fi

  # Move message catalogs to source directory.
  mv ../objdir/gcc/po/*.gmo gcc/po/

  # Create a `.brik' file to use for checking the validity of the
  # release.
  changedir "${SOURCE_DIRECTORY}"
  BRIK_FILE=`mktemp /tmp/gcc_release.XXXXXXX`
  ((find . -type f | sort > $BRIK_FILE) && \
       brik -Gb -f ${BRIK_FILE} > .brik && \
       rm ${BRIK_FILE}) || \
     error "Could not compute brik checksum"
}

# Buid a single tarfile.  The first argument is the name of the name
# of the tarfile to build, without any suffixes.  They will be added
# automatically.  The rest of the arguments are the files or
# directories to include.

build_tarfile() {
  # Get the name of the destination tar file.
  TARFILE="$1.tar.gz"
  shift

  # Build the tar file itself.
  (${TAR} cf - "$@" | ${GZIP} > ${TARFILE}) || \
    error "Could not build tarfile"
  FILE_LIST="${FILE_LIST} ${TARFILE}"
}

# Build the various tar files for the release.

build_tarfiles() {
  inform "Building tarfiles"

  changedir "${WORKING_DIRECTORY}"

  # The GNU Coding Standards specify that all files should
  # world readable.
  chmod -R a+r ${SOURCE_DIRECTORY}
  # And that all directories have mode 777.
  find ${SOURCE_DIRECTORY} -type d -exec chmod 777 {} \;
 
  # Build one huge tarfile for the entire distribution.
  build_tarfile gcc-${RELEASE} `basename ${SOURCE_DIRECTORY}`

  # Now, build one for each of the languages.
  build_tarfile gcc-g++-${RELEASE} ${CPLUSPLUS_DIRS}
  build_tarfile gcc-g77-${RELEASE} ${FORTRAN_DIRS}
  build_tarfile gcc-java-${RELEASE} ${JAVA_DIRS}
  build_tarfile gcc-objc-${RELEASE} ${OBJECTIVEC_DIRS}
  build_tarfile gcc-testsuite-${RELEASE} ${TESTSUITE_DIRS}
   
  # The core is everything else.
  EXCLUDES=""
  for x in ${CPLUSPLUS_DIRS} ${FORTRAN_DIRS} ${JAVA_DIRS} \
           ${OBJECTIVEC_DIRS} ${TESTSUITE_DIRS}; do
    EXCLUDES="${EXCLUDES} --exclude $x"
  done
  build_tarfile gcc-core-${RELEASE} ${EXCLUDES} \
    `basename ${SOURCE_DIRECTORY}`

  # Possibly build diffs.
  if [ -n "$OLD_TARS" ]; then
    for old_tar in $OLD_TARS; do
      build_diffs $old_tar
    done
  fi

  # Build .bz2 files.
  for f in ${FILE_LIST}; do
    bzfile=${f%.gz}.bz2
    zcat $f | ${BZIP2} > ${bzfile}
    FILE_LIST="${FILE_LIST} ${bzfile}"
  done
}

# Build diffs against an old release.
build_diffs() {
  old_dir=${1%/*}
  old_file=${1##*/}
  old_vers=${old_file%.tar.gz}
  old_vers=${old_vers#gcc-}
  inform "Building diffs against version $old_vers"
  for f in gcc gcc-g++ gcc-g77 gcc-java gcc-objc gcc-testsuite gcc-core; do
    old_tar=${old_dir}/${f}-${old_vers}.tar.gz
    new_tar=${WORKING_DIRECTORY}/${f}-${RELEASE}.tar.gz
    if [ -e $old_tar ] && [ -e $new_tar ]; then
      build_diff $old_tar gcc-${old_vers} $new_tar gcc-${RELEASE} \
        ${f}-${old_vers}-${RELEASE}.diff.gz
    fi
  done
}

# Build an individual diff.
build_diff() {
  changedir "${WORKING_DIRECTORY}"
  tmpdir=gccdiff.$$
  mkdir $tmpdir || error "Could not create directory $tmpdir"
  changedir $tmpdir
  tar xfz $1 || error "Could not unpack $1 for diffs"
  tar xfz $3 || error "Could not unpack $3 for diffs"
  ${DIFF} $2 $4 | ${GZIP} > ../$5
  if [ $? -eq 2 ]; then
    error "Trouble making diffs from $1 to $3"
  fi
  changedir ..
  rm -rf $tmpdir
  FILE_LIST="${FILE_LIST} $5"
}

# Upload the files to the FTP server.

upload_files() {
  inform "Uploading files"

  changedir "${WORKING_DIRECTORY}"

  # Copy the tar files to the FTP server.
  for x in gcc*.gz gcc*.bz2; do
    if [ -e ${x} ]; then
      # Make sure the file will be readable on the server.
      chmod a+r ${x}
      # Copy it.
      ${SCP} -p ${x} ${FTP_PATH} || \
        error "Could not upload ${x}"
    fi
  done
}

########################################################################
# Initialization
########################################################################

# Today's date.
DATE=`date "+%Y%m%d"`

# The CVS server containing the GCC repository.
CVS_SERVER="gcc.gnu.org"
# The path to the repository on that server.
CVS_REPOSITORY="/cvs/gcc"
# The CVS protocol to use.
CVS_PROTOCOL="ext"
# The username to use when connecting to the server.
CVS_USERNAME="${USER}"

# The path to the directory where the files are uploaded for FTP.
FTP_PATH="gccadmin@gcc.gnu.org:~ftp/pub/gcc"

# The major number for the release.  For release `3.0.2' this would be 
# `3'
RELEASE_MAJOR=""
# The minor number for the release.  For release `3.0.2' this would be
# `0'.
RELEASE_MINOR=""
# The revision number for the release.  For release `3.0.2' this would
# be `2'.
RELEASE_REVISION=""
# The complete name of the release.
RELEASE=""

# The name of the branch from which the release should be made.
BRANCH=""

# The tag to apply to the sources used for the release.
TAG=""

# The old tarballs from which to generate diffs.
OLD_TARS=""

# The directory that will be used to construct the release.  The
# release itself will be placed in a subdirectory of this diretory.
DESTINATION=${HOME}
# The subdirectory.
WORKING_DIRECTORY=""
# The directory that will contain the GCC sources.
SOURCE_DIRECTORY=""

# The directories that should be part of the various language-specific
# tar files.  These are all relative to the top of the source tree.
CPLUSPLUS_DIRS="gcc/cp libstdc++-v3"
FORTRAN_DIRS="gcc/f libf2c"
JAVA_DIRS="gcc/java libjava libffi fastjar zlib boehm-gc"
OBJECTIVEC_DIRS="gcc/objc libobjc"
TESTSUITE_DIRS="gcc/testsuite"

# Non-zero if this is the final release, rather than a prerelease.
FINAL=0

# Non-zero if we are building a snapshot, and don't build gcc or
# include generated files.
SNAPSHOT=0

# Major operation modes.
MODE_SOURCES=0
MODE_TARFILES=0
MODE_UPLOAD=0

# Files generated to upload.
FILE_LIST=""

# Programs we use.

BZIP2="${BZIP2:-bzip2}"
CVS="${CVS:-cvs -f -Q -z9}"
DIFF="${DIFF:-diff -Nrc3pad}"
ENV="${ENV:-env}"
GZIP="${GZIP:-gzip --best}"
SCP="${SCP:-scp}"
TAR="${TAR:-tar}"

########################################################################
# Command Line Processing
########################################################################

# Parse the options.
while getopts "d:fr:u:t:p:s" ARG; do
    case $ARG in
    d)    DESTINATION="${OPTARG}";;
    r)    RELEASE="${OPTARG}";;
    t)    TAG="${OPTARG}";;
    u)    CVS_USERNAME="${OPTARG}";;
    f)    FINAL=1;;
    s)    SNAPSHOT=1;;
    p)    OLD_TARS="${OLD_TARS} ${OPTARG}";;
    \?)   usage;;
    esac
done
shift `expr ${OPTIND} - 1`

# Perform consistency checking.
if [ -z ${CVS_USERNAME} ]; then
  error "No username specified"
fi

if [ -z ${RELEASE} ]; then
  error "No release number specified"
fi

if [ ! -d ${DESTINATION} ]; then
  error "\`${DESTINATION}' is not a directory"
fi

# Compute the major and minor release numbers.
RELEASE_MAJOR=`echo $RELEASE | awk --assign FS=. '{ print $1; }'`
RELEASE_MINOR=`echo $RELEASE | awk --assign FS=. '{ print $2; }'`
RELEASE_REVISION=`echo $RELEASE | awk --assign FS=. '{ print $3; }'`

if [ -z "${RELEASE_MAJOR}" ] || [ -z "${RELEASE_MINOR}" ]; then
  error "Release number \`${RELEASE}' is invalid"
fi

# Compute the full name of the release.
if [ -z "${RELEASE_REVISION}" ]; then
  RELEASE="${RELEASE_MAJOR}.${RELEASE_MINOR}"
else
  RELEASE="${RELEASE_MAJOR}.${RELEASE_MINOR}.${RELEASE_REVISION}"
fi

# Compute the name of the branch, which is based solely on the major
# and minor release numbers.
BRANCH="gcc-${RELEASE_MAJOR}_${RELEASE_MINOR}-branch"

# If this is not a final release, set various parameters acordingly.
if [ ${FINAL} -ne 1 ]; then
  RELEASE="${RELEASE}-${DATE}"
  FTP_PATH="${FTP_PATH}/snapshots"
else
  FTP_PATH="${FTP_PATH}/releases/gcc-${RELEASE}"
fi

# Compute the name of the WORKING_DIRECTORY and the SOURCE_DIRECTORY.
WORKING_DIRECTORY="${DESTINATION}/gcc-${RELEASE}"
SOURCE_DIRECTORY="${WORKING_DIRECTORY}/gcc-${RELEASE}"

# Recompute the names of all the language-specific directories,
# relative to the WORKING_DIRECTORY.
CPLUSPLUS_DIRS=`adjust_dirs ${CPLUSPLUS_DIRS}`
FORTRAN_DIRS=`adjust_dirs ${FORTRAN_DIRS}`
JAVA_DIRS=`adjust_dirs ${JAVA_DIRS}`
OBJECTIVEC_DIRS=`adjust_dirs ${OBJECTIVEC_DIRS}`
TESTSUITE_DIRS=`adjust_dirs ${TESTSUITE_DIRS}`

# Set up CVSROOT.
CVSROOT=":${CVS_PROTOCOL}:${CVS_USERNAME}@"
CVSROOT="${CVSROOT}${CVS_SERVER}:${CVS_REPOSITORY}"
export CVSROOT

########################################################################
# Main Program
########################################################################

# Handle the major modes.
while [ $# -ne 0 ]; do
    case $1 in
    sources)  MODE_SOURCES=1;;
    tarfiles) MODE_TARFILES=1;;
    upload)   MODE_UPLOAD=1;;
    all)      MODE_SOURCES=1; MODE_TARFILES=1; MODE_UPLOAD=1;;
    *)        error "Unknown mode $1";;
    esac
    shift
done

# Build the source directory.

if [ $MODE_SOURCES -ne 0 ]; then
  build_sources
fi

# Build the tar files.

if [ $MODE_TARFILES -ne 0 ]; then
  build_tarfiles
fi

# Upload them to the FTP server.

if [ $MODE_UPLOAD -ne 0 ]; then
  upload_files
fi