trimss.sh

#!/bin/bash
#
#   @(#) スクショを撮影してタイトルバーとかをトリミングしてくれるやつ
#
#   Author:
#       844196 (@84____)
#
#   License:
#       MIT
#


# initialize
## option
set -u
set -e

## about me
readonly ME="${0##*/}"
readonly VERSION="0.1"

## error
function error() {
    echo "${ME}: ${1}" 1>&2
    exit "${2:-1}"
}

## temporary
readonly TMPDIR="${TMP:-/tmp}/${ME}.$$"
mkdir -p "${TMPDIR}"
trap 'rm -r ${TMPDIR}' 0
function makeTmpFile() {
    local filename="${TMPDIR}/${1:-${RANDOM}.tmp}"
    (
        umask 0077
        : >"${filename}"
    ) && echo "${filename}"
    return 0
}

## check require command
type convert >/dev/null 2>&1 || error "requires convert(ImageMagick)" "2"


# main
## take screen capture
screencapture -wo "$(makeTmpFile ss_master.png)"
output_filename="${1:-./$(date +"%Y-%m-%d_%H-%M-%S").png}"

## triming top titlebar
convert -chop 0x18 "${TMPDIR}/ss_master.png" "$(makeTmpFile ss_top-triming.png)"

## triming bottom round transpacy
convert -shave 0x4 "${TMPDIR}/ss_top-triming.png" "${output_filename}"

## print output filename and exit
[[ -p /dev/stdout ]] && echo "${output_filename}"
exit 0