view hgeditor @ 37722:89a16704114c

wireprotov2: define response data as CBOR

Previously, response data was defined as a stream of bytes. We had
the option to declare it as CBOR using a frame flag.

We've converged all wire protocol commands exposed on version 2 to
CBOR. I think consistency is important. The overhead to encoding
things with CBOR is minimal. Even a very large bytestring can be
efficiently encoded using an indefinite length bytestring. Now,
there are limitations with consumers not being able to efficiently
stream large CBOR values. But these feel like solvable problems.

This commit removes the "is CBOR" frame flag from command response
frames and defines the frame as always consisting of a stream of
CBOR values.

The framing protocol media type has been bumped to reflect this
BC change.

Differential Revision: https://phab.mercurial-scm.org/D3382

#!/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 $?