#!/bin/sh
# Print a version string.
scriptversion=2017-01-09.19; # UTC

# Copyright (C) 2007-2017 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/>.

# This script is derived from GIT-VERSION-GEN from GIT: http://git.or.cz/.
# It may be run two ways:
# - from a git repository in which the "git describe" command below
#   produces useful output (thus requiring at least one signed tag)
# - from a non-git-repo directory containing a .tarball-version file, which
#   presumes this script is invoked like "./g</td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=6f4bfc5263ba0de5e3357b2fc210c3f451cf89c7'>refs</a><a href='/guix/log/.editorconfig'>log</a><a href='/guix/tree/.editorconfig?id=6f4bfc5263ba0de5e3357b2fc210c3f451cf89c7'>tree</a><a href='/guix/commit/.editorconfig?id=6f4bfc5263ba0de5e3357b2fc210c3f451cf89c7'>commit</a><a class='active' href='/guix/diff/.editorconfig?id=6f4bfc5263ba0de5e3357b2fc210c3f451cf89c7&amp;id2=ffc9986ee21aef1f4bf8a0d9f7f919ffbc2a5505'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/.editorconfig'>
<input type='hidden' name='id' value='6f4bfc5263ba0de5e3357b2fc210c3f451cf89c7'/><input type='hidden' name='id2' value='ffc9986ee21aef1f4bf8a0d9f7f919ffbc2a5505'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/diff/?id=6f4bfc5263ba0de5e3357b2fc210c3f451cf89c7&amp;id2=ffc9986ee21aef1f4bf8a0d9f7f919ffbc2a5505'>root</a>/<a href='/guix/diff/.editorconfig?id=6f4bfc5263ba0de5e3357b2fc210c3f451cf89c7&amp;id2=ffc9986ee21aef1f4bf8a0d9f7f919ffbc2a5505'>.editorconfig</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='6f4bfc5263ba0de5e3357b2fc210c3f451cf89c7'/><input type='hidden' name='id2' value='ffc9986ee21aef1f4bf8a0d9f7f919ffbc2a5505'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><div class='diffstat-header'><a href='/guix/diff/?id=6f4bfc5263ba0de5e3357b2fc210c3f451cf89c7&amp;id2=ffc9986ee21aef1f4bf8a0d9f7f919ffbc2a5505'>Diffstat</a> (limited to '.editorconfig')</div><table summary='diffstat' class='diffstat'></table><div class='diffstat-summary'>0 files changed, 0 insertions, 0 deletions</div><table summary='diff' class='diff'><tr><td></td></tr></table></div> <!-- class=content -->
                         <div class=footer>generated by
                             <a href="https://git.zx2c4.com/cgit/about/">
                                 cgit
                             </a>
                         </div>
                        </div> <!-- id=cgit -->
</body>
</html>
ac
  shift
done

if test "x$tarball_version_file" = x; then
    echo "$usage"
    exit 1
fi

tag_sed_script="${tag_sed_script:-s/x/x/}"

nl='
'

# Avoid meddling by environment variable of the same name.
v=
v_from_git=

# First see if there is a tarball-only version file.
# then try "git describe", then default.
if test -f $tarball_version_file
then
    v=`cat $tarball_version_file` || v=
    case $v in
        *$nl*) v= ;; # reject multi-line output
        [0-9]*) ;;
        *) v= ;;
    esac
    test "x$v" = x \
        && echo "$0: WARNING: $tarball_version_file is missing or damaged" 1>&2
fi

if test "x$v" != x
then
    : # use $v
# Otherwise, if there is at least one git commit involving the working
# directory, and "git describe" output looks sensible, use that to
# derive a version string.
elif test "`git log -1 --pretty=format:x . 2>&1`" = x \
    && v=`git describe --abbrev=4 --match="$prefix*" HEAD 2>/dev/null \
          || git describe --abbrev=4 HEAD 2>/dev/null` \
    && v=`printf '%s\n' "$v" | sed "$tag_sed_script"` \
    && case $v in
         $prefix[0-9]*) ;;
         *) (exit 1) ;;
       esac
then
    # Is this a new git that lists number of commits since the last
    # tag or the previous older version that did not?
    #   Newer: v6.10-77-g0f8faeb
    #   Older: v6.10-g0f8faeb
    case $v in
        *-*-*) : git describe is okay three part flavor ;;
        *-*)
            : git describe is older two part flavor
            # Recreate the number of commits and rewrite such that the
            # result is the same as if we were using the newer version
            # of git describe.
            vtag=`echo "$v" | sed 's/-.*//'`
            commit_list=`git rev-list "$vtag"..HEAD 2>/dev/null` \
                || { commit_list=failed;
                     echo "$0: WARNING: git rev-list failed" 1>&2; }
            numcommits=`echo "$commit_list" | wc -l`
            v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`;
            test "$commit_list" = failed && v=UNKNOWN
            ;;
    esac

    # Change the first '-' to a '.', so version-comparing tools work properly.
    # Remove the "g" in git describe's output string, to save a byte.
    v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`;
    v_from_git=1
elif test "x$fallback" = x || git --version >/dev/null 2>&1; then
    v=UNKNOWN
else
    v=$fallback
fi

v=`echo "$v" |sed "s/^$prefix//"`

# Test whether to append the "-dirty" suffix only if the version
# string we're using came from git.  I.e., skip the test if it's "UNKNOWN"
# or if it came from .tarball-version.
if test "x$v_from_git" != x; then
  # Don't declare a version "dirty" merely because a timestamp has changed.
  git update-index --refresh > /dev/null 2>&1

  dirty=`exec 2>/dev/null;git diff-index --name-only HEAD` || dirty=
  case "$dirty" in
      '') ;;
      *) # Append the suffix only if there isn't one already.
          case $v in
            *-dirty) ;;
            *) v="$v-dirty" ;;
          esac ;;
  esac
fi

# Omit the trailing newline, so that m4_esyscmd can use the result directly.
printf %s "$v"

# Local variables:
# eval: (add-hook 'write-file-hooks 'time-stamp)
# time-stamp-start: "scriptversion="
# time-stamp-format: "%:y-%02m-%02d.%02H"
# time-stamp-time-zone: "UTC0"
# time-stamp-end: "; # UTC"
# End: