view hgeditor @ 28796:08a686a4a0a2

hghave: add cvsnt

cvsnt is a maintained commercial fork of cvs
https://en.wikipedia.org/wiki/CVSNT

It is possible to build a version of it from sources (github),
it requires libpcre and libltdl (libtool).

We already have a test that relates to cvsnt:
test-convert-cvsnt-mergepoints.t

cvsnt installs: cvs, cvslockd, cvsnt, cvsscript

I think we should definitely have a check for cvsnt because it makes
the version checks for cvs make a lot more sense.

When I use the version I built, cvs --version says:

"""
Concurrent Versions System (CVSNT) 2.5.05 (Gan) Build 3744 (Suite) (client/server)

CVSNT 2.5.05 (Apr  4 2016) Copyright (c) 2008 March Hare Software Ltd.
see http://www.march-hare.com/cvspro


CVS Copyright (c) 1989-2001 Brian Berliner, david d `zoo' zuhn,

Jeff Polk, and other authors
CVSNT Copyright (c) 1999-2008 Tony Hoyle and others
see http://www.cvsnt.org

Commercial support and training provided by March Hare Software Ltd.
see http://www.march-hare.com/cvspro

CVSNT may be copied only under the terms of the GNU General Public License v2,
a copy of which can be found with the CVS distribution.

The CVSNT Application API is licensed under the terms of the
GNU Library (or Lesser) General Public License.

Specify the --help option for further information about CVS
"""

#!/bin/sh
#
# This is an example of using HGEDITOR to create of diff to review the
# changes while committing.

# If you want to pass your favourite editor some other parameters
# only for Mercurial, modify this:
case "${EDITOR}" in
    "")
        EDITOR="vi"
        ;;
    emacs)
        EDITOR="$EDITOR -nw"
        ;;
    gvim|vim)
        EDITOR="$EDITOR -f -o"
        ;;
esac


HGTMP=""
cleanup_exit() {
    rm -rf "$HGTMP"
}

# Remove temporary files even if we get interrupted
trap "cleanup_exit" 0 # normal exit
trap "exit 255" HUP INT QUIT ABRT TERM

HGTMP=$(mktemp -d ${TMPDIR-/tmp}/hgeditor.XXXXXX)
[ x$HGTMP != x -a -d $HGTMP ] || {
  echo "Could not create temporary directory! Exiting." 1>&2
  exit 1
}

(
    grep '^HG: changed' "$1" | cut -b 13- | while read changed; do
        "$HG" diff "$changed" >> "$HGTMP/diff"
    done
)

cat "$1" > "$HGTMP/msg"

MD5=$(which md5sum 2>/dev/null) || \
    MD5=$(which md5 2>/dev/null)
[ -x "${MD5}" ] && CHECKSUM=`${MD5} "$HGTMP/msg"`
if [ -s "$HGTMP/diff" ]; then
    $EDITOR "$HGTMP/msg" "$HGTMP/diff" || exit $?
else
    $EDITOR "$HGTMP/msg" || exit $?
fi
[ -x "${MD5}" ] && (echo "$CHECKSUM" | ${MD5} -c >/dev/null 2>&1 && exit 13)

mv "$HGTMP/msg" "$1"

exit $?