annotate hgeditor @ 45023:e54c3cafda15 stable

convert: convert URLs to UTF-8 for Subversion

Preamble: for comprehension, note that the `path` of geturl() would better be
called `path_or_url` (the argument of the call of getsvn() is called `url`).

For HTTP(S) URLs, the changes don’t make a difference, as they are restricted to
ASCII.

For file URLs, the reasoning is the same as for paths: we have to roundtrip with
what Subversion is doing.

When the locale encoding is ISO-8859-15, trying to convert a SVN repo
`file:///tmp/a€` failed before like this:

file:///tmp/a%A4 does not look like a Subversion repository to libsvn version 1.14.0

Decoding the path using the locale encoding can fail. In this case, we have to
bail out, as Subversion won’t be able to do anything useful with the path.

#!/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 $?