AS_INIT[]m4_divert_push([HEADER-COPYRIGHT])dnl
# @configure_input@

# clcommit (GNU @PACKAGE@) version 2.1
# Written by Gary V. Vaughan <gary@gnu.org>
# and Alexandre Oliva <aoliva@redhat.com>

# Copyright (C) 1999, 2000, 2004, 2006, 2008, 2009, 2010 Free Software
# Foundation, Inc.
# This is free software; see the source for copying conditions.  There is NO
# warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

# Clcommit 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 of the License, or
# (at your option) any later version.
#
# Clcommit 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 clcommit; see the file COPYING.  If not, a copy
# can be downloaded from http://www.gnu.org/licenses/gpl.html,
# or obtained by writing to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

# Usage: $progname [OPTION]... [--] [filepattern ...]

# -a AUTHOR --author=AUTHOR    override changeset author name with AUTHOR
# -C FILE   --changelog=FILE   extract commit message from specified FILE
#           --debug            enable verbose shell tracing
# -n        --dry-run          don't commit anything
#           --fast             same as --force --first
# -F FILE   --file=FILE        read commit message from FILE
# -1        --first            extract first entry from ChangeLog, no git diff
# -f        --force            don't check (unless *followed* by -n), and just
#                              display commit message instead of running $PAGER
#           --from=ADDRESS     override default from ADDRESS in commit email
# -m STRING --message=STRING   set commit message to STRING
#           --msg=STRING          same as -m
# -p        --push             push the changes back to origin
# -r [FILE] --rcfile[=FILE]    read default option from FILE [./.clcommitrc]
# -s ADDR   --sendmail=ADDR    send commit email of the differences to ADDRESS
#           --signature[=FILE] add FILE to the end of the email [~/.signature]
#           --signoff          add a Signed-off-by attribution at the end
# -S TEXT   --summary=TEXT     specify a TEXT subject line for the commit email
#           --tags             in conjunction with -p, also push tags
# -v        --verbose          run in verbose mode
#           --version          print version information
# -h,-?     --help             print short or long help message

# This script eases checking in changes to git-maintained projects
# with ChangeLog files.  It will check that there have been no
# conflicting commits in the git repository and print which files it
# is going to commit to stderr.  A list of files to compare and to
# check in can be given in the command line.  If it is not given, all
# files in the current working directory are considered for check in.

# The commit message will be extracted from the differences between a
# file named ChangeLog* in the commit list, or named after -C, and the
# one in the repository (unless a message was specified with `-m' or
# `-F').  An empty message is not accepted (but a blank line is).  If
# the message is acceptable, it will be presented for verification
# (and possible edition) using the $PAGER environment variable (or
# `more', if it is not set, or `cat', if the `-f' switch is given).
# If $PAGER exits successfully, the modified files (at that moment)
# are checked in, unless `-n' was specified, in which case nothing is
# checked in.

# Report bugs to <gary@gnu.org>

: ${GIT="git"}
: ${MAILNOTIFY="mailnotify"}
: ${MKSTAMP="mkstamp"}

test -f "libltdl/config/$MAILNOTIFY" && MAILNOTIFY="libltdl/config/$MAILNOTIFY"
test -f "libltdl/config/$MKSTAMP" && MKSTAMP="libltdl/config/$MKSTAMP"

PROGRAM=clcommit

m4_divert_pop
m4_include([getopt.m4sh])

M4SH_VERBATIM([[
# Locations for important files:
log_dir="`func_mktempdir`"
log_file="$log_dir/log"
push_conflicts="$log_dir/git_push.log"

trap '$RM -r "$log_dir"; exit $EXIT_FAILURE' 1 2 15

# try to find out whether read supports -r
if echo bt | tr b '\\' | { read -r line; test "X$line" = 'X\t'; } 2>/dev/null
then
  read_r='read -r'
else
  read_r=read
fi
]])

dnl SHORT	LONG			       DEFAULT		      INIT
dnl ----------------------------------------------------------------------
M4SH_GETOPTS(
  [1],		[--first],			[],			[],
  [a^!],	[--author],			[],			[
	git_flags="${git_flags+$git_flags }--author=$opt_author"],
  [C@],		[--changelog|--Change[Ll]og],	[],			[],
  [F!],		[--file],			[],			[
	cat "[$]1" > "$log_file" || break],
  [f],		[--force],			[],			[
	PAGER=cat],
  [m!],		[--message|--msg],		[],			[
	echo "[$]1" > "$log_file"],
  [n],		[--dry-run|--dryrun],		[],			[
	mailnotify_flags="${mailnotify_flags+$mailnotify_flags }--dry-run"],
  [p],		[--push],			[],			[],
  [r@?],	[--rcfile],			[./.clcommitrc],	[
	# The funny quoting allows keeping one option per line in $opt_rcfile:
	eval set dummy `echo \`cat $opt_rcfile\` '${1+"[$]@"}'`
	shift],
  [S!],		[--summary],			[],			[],
  [s^!],	[--sendmail],			[],			[],
  [v],		[--verbose],			[],			[
	mailnotify_flags="${mailnotify_flags+$mailnotify_flags }--verbose"],
  [],		[--fast],			[],			[
	set dummy --force --first ${1+"[$]@"}; shift],
  [^!],		[--from],			[],			[
	mailnotify_flags="${mailnotify_flags+$mailnotify_flags }--from=$opt_from"],
  [@?],		[--signature],			[],			[
	test -n "$opt_signature" || opt_signature="$HOME/.signature"],
  [],		[--signoff],			[],			[
	git_flags="${git_flags+$git_flags }$opt"],
  [],		[--tags],			[],			[],
 [
  # pass debug flag along to mailnotify
  test "$opt_debug" != ":" &&
      mailnotify_flags="${mailnotify_flags+$mailnotify_flags }--debug"

  # validate $opt_first, $opt_file and $opt_message
  if $opt_first; then
      test -n "$opt_file$opt_message" &&
          func_error "you can have at most one of -m, -F and -1"
  else
      test -n "$opt_file" && test -n "$opt_message" &&
          func_error "you can have at most one of -m, -F and -1"
  fi

  # validate $opt_from and $opt_signature
  test -n "$opt_sendmail" || {
    # can't have a from address without a destination address
    test -n "$opt_from" &&
      func_error "can't use --from without --sendmail." && exit_cmd=exit

    # can't use a signature file without a destination address
    test -n "$opt_signature" &&
      func_error "can't use --signature without --sendmail." && exit_cmd=exit
  }

  # validate $opt_tags
  $opt_push || {
      $opt_tags &&
          func_error "can't use --tags without --push." && exit_cmd=exit
  }
])

M4SH_VERBATIM([[
# Bail out on command errors!
set -e

# func_check_conflicts
func_check_conflicts ()
{
    $opt_debug

    func_verbose "checking for commit conflicts..."
    if $GIT push --dry-run > "$push_conflicts" 2>&1; then :; else
      cat "$push_conflicts" >&2
      func_fatal_error "some conflicts were found with upstream repository, aborting..."
    fi
}


# func_check_commit_msg
func_check_commit_msg ()
{
    $opt_debug

    if test -z "$opt_changelog"; then
      for f in ${1+"$@"}; do
        case "$f" in
          ChangeLog* | */ChangeLog*)
            if test -z "$opt_changelog"; then
	      opt_changelog="$f"
	    else
	      func_fatal_error "multiple ChangeLog files: $opt_changelog and $f"
	    fi
	  ;;
        esac
      done
    fi

    func_verbose "checking commit message..."
    separate_summary=:		# whether to separate summary lines for git
    if $opt_first; then
      skipping=:
      $SED 's,^,+,' < ${opt_changelog-ChangeLog} |
        while $read_r line; do
          case "$line" in
            "+") if $skipping; then skipping=false; else break; fi;;
            "+ "*)
	      func_error "*** Warning: lines should start with tabs, not spaces; ignoring line:"
	      echo "$line" | $SED 's/^.//' >&2;;
            "+	*"*)			# asterisk marks end of summary line
              $skipping || echo "$line"
	      separate_summary=false ;;
            "+	"*".") 			# summary line must end with a period
	      $skipping || {
		echo "$line"
		$separate_summary && echo "+	"
		separate_summary=false
	      };;
	    "+	"*)			# no separator for multiline summary
	      echo "$line"
	      separate_summary=false ;;
          esac
        done |
          $SED 's,^\+	,,' > "$log_file" || exit $EXIT_FAILURE
    else
      $GIT diff ${opt_changelog-ChangeLog} |
        while $read_r line; do
          case $line in
            "--- "*) :;;
            "-"*)
	      func_error "*** Warning: the following line in ChangeLog diff is suspicious:"
	      echo "$line" | $SED 's/^.//' >&2;;
            "+ "*)
	      func_error "*** Warning: lines should start with tabs, not spaces; ignoring line:"
	      echo "$line" | $SED 's/^.//' >&2;;
            "+") echo ;;
            "+	*"*)			# asterisk marks end of summary line
	      echo "$line"
              separate_summary=false ;;
            "+	"*".") 			# summary line must end with a period
	      echo "$line"
	      $separate_summary && echo "+	"
	      separate_summary=false ;;
	    "+	"*)			# no separator for multiline summary
	      echo "$line"
	      separate_summary=false ;;
          esac
        done |
          $SED -e 's,\+	,,' -e '/./p' -e '/./d' -e '1d' -e '$d' > "$log_file" \
      || exit $EXIT_FAILURE
    fi
    # The sed script above removes "+TAB" from the beginning of a line, then
    # deletes the first and/or the last line, when they happen to be empty
}


# func_commit
func_commit ()
{
    $opt_debug

    ${PAGER-more} "$log_file" || exit $EXIT_FAILURE

    sleep 1 # give the user some time for a ^C

    subject=`git status 2>/dev/null | $SED -n 's/^#.*[mad][ode][dl].*ed: *//p'`
    test $# -gt 0 && subject="$@"

    test $# -gt 0 || { set dummy -a; shift; }
    func_show_eval "$GIT commit $git_flags -F $log_file ${1+$@}" "exit $EXIT_FAILURE"

    $opt_push && {
      func_show_eval "$GIT push"
      $opt_tags && func_show_eval "$GIT push --tags"
    }

    :
}


# func_mailnotify
func_mailnotify ()
{
    $opt_debug

    notify_file="${log_dir}/notify"
    func_verbose "Mailing commit notification to \"$opt_sendmail\""

    {
      echo Subject: $subject
      test -f .git/config &&
          echo "Root:		`$SED -n 's,^	url = .*:\(.*\)$,\1,p' .git/config`"
      test -f $MKSTAMP &&
          echo "Timestamp:	`$SHELL $MKSTAMP .`"
      echo "Branch:		`$GIT branch | sed -n 's/\* //p'`"
      test -f .git/config &&
          echo "Changes by:	`$SED -n 's,^	url = \([^:]*\):.*$,\1,p' .git/config`"
      echo ""
      echo "Log Message:"
      $SED -e 's,^,	,' "$log_file"
      test -f "$opt_signature" && {
        echo '-- '
	cat "$opt_signature"
      }
    } > "$notify_file"

    ${PAGER-more} "$notify_file" || break

    # Break out the subject line again
    my_mail_subject=`$SED -e '
        1{
	    s/^Subject: *//
	    q
	}' "$notify_file"`
    my_mail_body=`$SED -e '2,$p;d' "$notify_file"`
    echo "$my_mail_body" > "$notify_file"

    func_quote_for_eval "$my_mail_subject"
    func_show_eval "$MAILNOTIFY $mailnotify_flags \
        -s $func_quote_for_eval_result -m 'text/plain' -f '$notify_file' \
	-- $opt_sendmail"
}


## ----- ##
## main. ##
## ----- ##

{
  test -f "$log_file" || func_check_commit_msg

  grep '[^ 	]' < "$log_file" > /dev/null ||
    func_fatal_error "empty commit message, aborting"

  # We expect line 2 to be blank, since it separates the git summary line from
  # the commit message body, but any others are probably an error:
  if sed 2d "$log_file" | grep '^$' > /dev/null; then
    func_error "*** Warning: blank lines should not appear within commit messages."
    func_error "*** They should be used to separate distinct commits."
  fi

  # $opt_force says to force the changes through without checking for conflicts
  $opt_push && {
      $opt_force || func_check_conflicts
  }

  # Do not check for empty $log_file again, even though the user might have
  # zeroed it out.  If s/he did, it was probably intentional.
  func_commit ${1+"$@"}

  # Send a copy of the log_file if opt_sendmail was set:
  subject=`sed -n '1p' "$log_file"`
  if test -n "$opt_sendmail"; then
    if ! $opt_push; then
      func_warning "Mail notification NOT sent for commit to local repository."
    else
      func_mailnotify
    fi
  fi

  $RM -r "$log_dir"
}

exit $EXIT_SUCCESS

# Local Variables:
# mode:shell-script
# sh-indentation:2
# End:
]])