view hgeditor @ 17186:a3da6f298592

revset: add destination() predicate

This predicate is used to find csets that were created because of a graft,
transplant or rebase --keep.  An optional revset can be supplied, in which case
the result will be limited to those copies which specified one of the revs as
the source for the command.

    hg log -r destination()                 # csets copied from anywhere
    hg log -r destination(branch(default))  # all csets copied from default

    hg log -r origin(x) or destination(origin(x))  # all instances of x

This predicate will follow a cset through different types of copies.  Given a
repo with a cset 'S' that is grafted to create G(S), which itself is
transplanted to become T(G(S)):

    o-S
   /
  o-o-G(S)
   \
    o-T(G(S))

    hg log -r destination( S )    # { G(S), T(G(S)) }
    hg log -r destination( G(S) ) # { T(G(S)) }

The implementation differences between the three different copy commands (see
the origin() predicate) are not intentionally exposed, however if the
transplant was a graft instead:

	hg log -r destination( G(S) )   # {}

because the 'extra' field in G(G(S)) is S, not G(S).  The implementation cannot
correct this by following sources before G(S) and then select the csets that
reference those sources because the cset provided to the predicate would also
end up selected.  If there were more than two copies, sources of the argument
would also get selected.

Note that the convert extension does not currently update the 'extra' map in its
destination csets, and therefore copies made prior to the convert will be
missing from the resulting set.

Instead of the loop over 'subset', the following almost works, but does not
select a transplant of a transplant.  That is, 'destination(S)' will only
select T(S).

    dests = set([r for r in subset if _getrevsource(repo, r) in args])

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

# 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 $?