tex/vc
author insilmaril
Mon, 18 Jun 2007 15:10:19 +0000
changeset 507 2f57a7d2315e
parent 147 40de292411b6
child 612 316e9237794c
permissions -rwxr-xr-x
1.8.73 - beta testing
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#! /bin/bash
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#
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set -e  # abort on errors
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shopt -s nullglob  # file globs that don't match expand
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		   # to nothing
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#
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# Check if $EDITOR is set, otherwise set to "vi".
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#
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: ${EDITOR:=vi}
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#
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# Check for -f option ()
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#
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if [ "$1" = -f ]; then
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    retry_lock=1
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    shift
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fi
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#
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# Detect the name of the file to edit
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#
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unset FILE
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if [ -n "$1" ]; then
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    if [ -f "$1" ]; then
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	FILE=$1
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    else
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	if [ -d "$1" ]; then
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	    cd $1
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	else
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	    FILE=$(package_name $1).changelog
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	fi
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    fi
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fi
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if [ -z "$FILE" ]; then
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    for f in *.changelog; do
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	if [ -n "$FILE" ]; then
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	    FILE=
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	    break
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	fi
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	FILE=$f
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    done
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fi
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if [ -z "$FILE" ]; then
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    for f in *.spec; do
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	if [ -n "$FILE" ]; then
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	    FILE=
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	    break
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	fi
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	FILE=$f
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    done
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    if [ -n "$FILE" ]; then
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	FILE=$(package_name $FILE).changelog
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    fi
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fi
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if [ -z "$FILE" ]; then
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    echo "usage: ${0##*/} [filename[.changelog]|path [file_with_comment]]"
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    echo "If no <filename> is given, exactly one *.changelog or"
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    echo "*.spec file has to be in the cwd or in <path>."
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    echo
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    exit 1
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fi
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user=`whoami`
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COMMENT_FILE=$2
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#
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# Create the lockfile and temporary file.
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#
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lockfile=.${FILE##*/}.lock
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if [ "${FILE/\//}" != "$FILE" ]; then
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    lockfile=${FILE%/*}/.$lockfile
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fi
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if [ ! -w "$(dirname "$FILE")" ]; then
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    echo "Write access to directory $(dirname "$FILE") required" >&2
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    exit 1
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fi
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if [ -e "$FILE" -a ! -w "$FILE" ]; then
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    echo "Write access to file $FILE required" >&2
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    exit 1
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fi
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set -o noclobber
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while ! echo $$@$(hostname -f) 2> /dev/null > $lockfile; do
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    if [ -z "$retry_lock" ]; then
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	echo "$lockfile: Lock by process $(cat $lockfile)" >&2
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	echo "Please remove stale lockfiles manually" >&2
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	exit 1
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    fi
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    echo "$lockfile: Waiting for process $(cat $lockfile) to release lock" >&2
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    sleep 1
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done
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set +o noclobber
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tmpfile=$(mktemp /tmp/${0##*/}.XXXXXX)
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trap "rm -f $lockfile $tmpfile" EXIT
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#
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# Prepare the working copy and start the editor
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#
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{   timestamp=$(LC_ALL=POSIX TZ=Europe/Berlin date)
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    echo "-------------------------------------------------------------------"
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    echo "$timestamp - $user"
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    echo
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    if [ -z "$COMMENT_FILE" ]; then
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	echo "- "
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    else
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	cat $COMMENT_FILE
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    fi
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    echo
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    if [ -f "$FILE" ]; then
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    	cat $FILE
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    fi
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} >> $tmpfile \
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|| exit 1
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if [ -z "$COMMENT_FILE" ]; then
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    lines=1
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    CHKSUM_BEFORE=$(md5sum $tmpfile | awk '{print $1}')
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else
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    lines=$(wc -l $COMMENT_FILE | awk '{print $1}')
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    CHKSUM_BEFORE=has_changed
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fi
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$EDITOR +$((3+lines)) $tmpfile
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if [ "$CHKSUM_BEFORE" = "$(md5sum $tmpfile | awk '{print $1}')" ]; then
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    exit 1
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fi
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cat $tmpfile > $FILE