view hgeditor @ 27935:594bdc380aa2 stable

subrepo: better error messages in _ensuregit This patch improves the error messages raised when an OSError occurs, since simply re-raising the exception can be both confusing and misleading. For example, if "hg identify" is run inside a repository that contains a Git subrepository and the git binary could not be found, it'll exit with the message "abort: No such file or directory". That implies "identify" has a problem reading the repository itself. There's no way for the user to know what the real problem is unless they dive into the Mercurial source, which is what I ended up doing after spending hours debugging errors while provisioning a VM with Ansible (turns out I forgot to install Git on it). Descriptive errors are especially important on Windows, since it's common for Windows users to forget to set the "Path" system variable after installing Git.
author Mason Malone <mason.malone@gmail.com>
date Sun, 17 Jan 2016 22:53:57 -0500
parents 1aee2ab0f902
children
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#!/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 $?