hgeditor

largefiles: revert to lfilesrepo.status() being an unfiltered method

This effectively reverts 67d63ec85eb7, which caused some normal file copies to
not be displayed as copies.  Other normal file copies could be displayed- the
exact reason isn't clear.  This also adds two tests that were failing prior to
this backout, so that this can be sorted out next cycle.

The difference between copy cases that worked and those that didn't seemed to be
in copies.pathcopies().  When largefiles isn't enabled for the changed test, or
lfstatus is not set in the commands.status() override, 'y.ancestor(x) == x'.
That wasn't true otherwise, which fell through to the _chain() method.  In this
case, the copy is removed in the criss cross loop.

'y.ancestor(x)' returns a context.changectx type, while 'x' is a lfilesctx type
in the failing case.  I tried adding the ancestor method to the lfilesctx class
to change the type of the ancestor context, however the context when printed as
a string then gains a '+'.  This points to it being a context.committablectx,
which clearly isn't correct for an ancestor.  Possibly the problem is the
lfilesctx needs to subclass context.committablectx in some cases, but
context.changectx in others, within the same invocation?  I'm not sure how to
pull that off, and backing out this change is safer during the freeze.

As to the status changing when a path is specified, I haven't looked into it
yet.

#!/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 $?