snapshot scripts

snapshot.el

;;; snapshot
(defun snapshot ()
  (interactive)
  (let ((msg (read-from-minibuffer "comment: ")))
    (if (> (length msg) 0)
        (shell-command (concat "~/bin/snapshot -m \"" msg "\" " (buffer-file-name)))
      (shell-command (concat "~/bin/snapshot " (buffer-file-name))))))

snapshot.sh

#!/bin/sh

usage() {
    echo "Usage: ${0##*/} [-l] [-c] [-d] [-n NUM] [-m MESSAGE] ARGS ..."
    echo "Options:"
    echo "  l: list viewer"
    echo "  c: clean"
    echo "  d: diff"
    echo "  n: diff target"
    echo "  m: save to message"
    exit 1
}

DIFF_COMMAND="colordiff -s -u"
GREP_COMMAND="grep"

CLEAN=0
DIFF=0
HEAD=1
LIST=0
MESSAGE=

while getopts "hcdln:m:" OPTION; do
    case "${OPTION}" in
        "c")
            CLEAN=1
            ;;
        "d")
            DIFF=1
            ;;
        "n")
            HEAD="${OPTARG}"
            ;;
        "l")
            LIST=1
            ;;
        "m")
            MESSAGE="${OPTARG}"
            ;;
        ?)
            usage
            ;;
    esac
done
shift $((${OPTIND}-1))

DIR=`pwd`

SNAPSHOT_DIRNAME=.snapshot
SNAPSHOT_DIR=${DIR}/${SNAPSHOT_DIRNAME}
SNAPSHOT_LIST=${SNAPSHOT_DIR}/.lists

if [ ! -d ${SNAPSHOT_DIR} ]; then
    mkdir -p ${SNAPSHOT_DIR}
fi

if [ ! -f ${SNAPSHOT_LIST} ]; then
    touch ${SNAPSHOT_LIST}
fi

# clean
if [ "${CLEAN}" = "1" ]; then
    if [ $# -eq 0 ]; then
        rm -rf ${SNAPSHOT_DIR}
    else
        for SOURCE in "$@"; do
            ORIGIN=`basename ${SOURCE}`
            grep -v "${ORIGIN}" ${SNAPSHOT_LIST} > ${SNAPSHOT_LIST}.new
            mv ${SNAPSHOT_LIST}.new ${SNAPSHOT_LIST}
            for FILE in `ls ${SNAPSHOT_DIR}/${ORIGIN}* 2> /dev/null`; do
                if [ -f ${FILE} ]; then
                    rm -f ${FILE}
                fi
            done
        done
    fi
    exit 0
fi

# list viewer
if [ "${LIST}" = "1" ]; then
    if [ $# -eq 0 ]; then
        cat ${SNAPSHOT_LIST}
    else
        for SOURCE in "$@"; do
            ${GREP_COMMAND} "${SOURCE}" ${SNAPSHOT_LIST}
        done
    fi
    exit 0
fi

# args
if [ $# -eq 0 ]; then
    usage
fi

# diff
if [ "${DIFF}" = "1" ]; then
    NUM=`echo -n ${HEAD} | sed 's/[0-9]//g'`
    if [ -n "${NUM}" ]; then
        echo "WARN: Non numeric: head to 1"
        HEAD=1
    fi
    for SOURCE in "$@"; do
        ORIGIN=`basename ${SOURCE}`
        if [ -f ${ORIGIN} ]; then
            TARGET=`ls -t -1 ./${SNAPSHOT_DIRNAME}/${ORIGIN}* 2> /dev/null | head -${HEAD} | tail -1`
            if [ ! "${TARGET}" = "" ]; then
                ${DIFF_COMMAND} ${TARGET} ${ORIGIN}
            else
                echo "ERR: No snapshot file: ${ORIGIN}"
            fi
        else
            echo "ERR: Current file: ${SOURCE}"
        fi
    done
    exit 0
fi

# copy
if [ ! "${MESSAGE}" = "" ]; then
    MESSAGE=" :${MESSAGE}"
fi

SUFFIX=.`date '+%Y%m%d%H%M%S'`
DATE=`date '+%Y-%m-%d %H:%M:%S'`

for SOURCE in "$@"; do
    ORIGIN=`basename ${SOURCE}`
    if [ -f ${ORIGIN} ]; then
        cp ${SOURCE} ${SNAPSHOT_DIR}/${ORIGIN}${SUFFIX}
        echo "[${DATE}] ${ORIGIN}${MESSAGE}" >> ${SNAPSHOT_LIST}
    else
        echo "ERR: Current file: ${SOURCE}"
    fi
done