#!/bin/sh

# In a git/autoconf/automake-enabled project with a NEWS file and a version-

# controlled .prev-version file, automate the procedure by which we record

# the date, release-type and version string in the NEWS file.  That commit

# will serve to identify the release, so apply a signed tag to it as well.

VERSION=2016-12-31.14 # UTC

# Note: this is a bash script (could be zsh or dash)

# Copyright (C) 2009-2017 Free Software Foundation, Inc.

# This program 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 3 of the License, or

# (at your option) any later version.

# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

# Written by Jim Meyering

ME=$(basename "$0")

warn() { printf '%s: %s\n' "$ME" "$*" >&2; }

die() { warn "$*"; exit 1; }

help()

{

  cat <

Usage: $ME [OPTION...] VERSION RELEASE_TYPE

Run this script from top_srcdir to perform the final pre-release NEWS

update in which the date, release-type and version string are

recorded.  Commit that result with a log entry marking the release,

and apply a signed tag.  Run it from your project's top-level

directory.

Requirements:

- you use git for version-control

- a version-controlled .prev-version file

- a NEWS file, with line 3 identical to this:

$noteworthy_stub

Options:

  --branch=BRANCH     set release branch (default: $branch)

  -C, --builddir=DIR  location of (configured) Makefile (default: $builddir)

  --help              print this help, then exit

  --version           print version number, then exit

EXAMPLE:

To update NEWS and tag the beta 8.1 release of coreutils, I would run this:

  $ME 8.1 beta

Report bugs and patches to <bug-gnulib@gnu.org>.

EOF

  exit

}

version()

{

  year=$(echo "$VERSION" | sed 's/[^0-9].*//')

  cat <

$ME $VERSION

Copyright (C) $year Free Software Foundation, Inc,

License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software: you are free to change and redistribute it.

There is NO WARRANTY, to the extent permitted by law.

EOF

  exit

}

## ------ ##

## Main.  ##

## ------ ##

# Constants.

noteworthy='* Noteworthy changes in release'

noteworthy_stub="$noteworthy ?.? (????-??-??) [?]"

# Variables.

branch=$(git branch | sed -ne '/^\* /{s///;p;q;}')

builddir=.

while test $# != 0

do

  # Handle --option=value by splitting apart and putting back on argv.

  case $1 in

    --*=*)

      opt=$(echo "$1" | sed -e 's/=.*//')

      val=$(echo "$1" | sed -e 's/[^=]*=//')

      shift

      set dummy "$opt" "$val" "$@"; shift

      ;;

  esac

  case $1 in

    --help|--version) ${1#--};;

    --branch) shift; branch=$1; shift ;;

    -C|--builddir) shift; builddir=$1; shift ;;

    --*) die "unrecognized option: $1";;

    *) break;;

  esac

done

test $# = 2 \

  || die "Usage: $ME [OPTION...] VERSION TYPE"

ver=$1

type=$2

## ---------------------- ##

## First, sanity checks.  ##

## ---------------------- ##

# Verify that $ver looks like a version number, and...

echo "$ver"|grep -E '^[0-9][0-9.]*[0-9]$' > /dev/null \

  || die "invalid version: $ver"

prev_ver=$(cat .prev-version) \

  || die 'failed to determine previous version number from .prev-version'

# Verify that $ver is sensible (> .prev-version).

case $(printf "$prev_ver\n$ver\n"|sort -V -u|tr '\n' ':') in

  "$prev_ver:$ver:") ;;

  *) die "invalid version: $ver (<= $prev_ver)";;

esac

case $type in

  alpha|beta|stable) ;;

  *) die "invalid release type: $type";;

esac

# No local modifications allowed.

case $(git diff-index --name-only HEAD) in

  '') ;;

  *) die 'this tree is dirty; commit your changes first';;

esac

# Ensure the current branch name is correct:

curr_br=$(git rev-parse --symbolic-full-name HEAD)

test "$curr_br" = "refs/heads/$branch" || die not on branch $branch

# Extract package name from Makefile.

Makefile=$builddir/Makefile

pkg=$(sed -n 's/^PACKAGE = \(.*\)/\1/p' "$Makefile") \

  || die "failed to determine package name from $Makefile"

# Check that line 3 of NEWS is the stub line about to be replaced.

test "$(sed -n 3p NEWS)" = "$noteworthy_stub" \

  || die "line 3 of NEWS must be exactly '$noteworthy_stub'"

## --------------- ##

## Then, changes.  ##

## --------------- ##

# Update NEWS to have today's date, plus desired version number and $type.

perl -MPOSIX -ni -e 'my $today = strftime "%F", localtime time;' \

 -e 'my ($type, $ver) = qw('"$type $ver"');' \

 -e 'my $pfx = "'"$noteworthy"'";' \

 -e 'print $.==3 ? "$pfx $ver ($today) [$type]\n" : $_' \

     NEWS || die 'failed to update NEWS'

printf "version $ver\n\n* NEWS: Record release date.\n" \

    | git commit -F -  -a || die 'git commit failed'

git tag -s -m "$pkg $ver" v$ver HEAD || die 'git tag failed'

# Local variables:

# indent-tabs-mode: nil

# eval: (add-hook 'write-file-hooks 'time-stamp)

# time-stamp-start: "VERSION="

# time-stamp-format: "%:y-%02m-%02d.%02H"

# time-stamp-time-zone: "UTC0"

# time-stamp-end: " # UTC"

# End: