view hgeditor @ 26123:bdac264e5ed4

contrib: add showstack extension

This allows getting a Python stack trace at any time on Unix by
hitting Ctrl-\ (or Ctrl-T on BSDs). Useful for debugging mysterious
hangs on the fly. Sample output:

$ hg log -k nosuchmessage
^\
  File "/home/mpm/hg/mercurial/revset.py", line 3089, in _iterfilter
    if cond(x):
  File "/home/mpm/hg/mercurial/util.py", line 415, in f
    cache[arg] = func(arg)
  File "/home/mpm/hg/mercurial/revset.py", line 1215, in matches
    for t in c.files() + [c.user(), c.description()])
  File "/home/mpm/hg/mercurial/context.py", line 525, in files
    return self._changeset[3]
  File "/home/mpm/hg/mercurial/util.py", line 531, in __get__
    result = self.func(obj)
  File "/home/mpm/hg/mercurial/context.py", line 498, in _changeset
    return self._repo.changelog.read(self.rev())
  File "/home/mpm/hg/mercurial/changelog.py", line 338, in read
    text = self.revision(node)
  File "/home/mpm/hg/mercurial/revlog.py", line 1092, in revision
    bins = self._chunks(chain)
  File "/home/mpm/hg/mercurial/revlog.py", line 1013, in _chunks
    ladd(decompress(buffer(data, chunkstart - offset, chunklength)))
  File "/home/mpm/hg/mercurial/revlog.py", line 91, in decompress
    return _decompress(bin)
----

#!/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 $?