cp-svn-url

#!/bin/bash
# @Function
# copy the svn remote url of current svn directory.
#
# @Usage
#   $ ./cp-svn-url
#   $ ./cp-svn-url /path/to/svn/work/dir
#
# @online-doc https://github.com/oldratlee/useful-scripts/blob/dev-2.x/docs/vcs.md#-cp-svn-url
# @author ivanzhangwb (ivanzhangwb at gmail dot com)
#
# NOTE about Bash Traps and Pitfalls:
#
# 1. DO NOT combine var declaration and assignment which value supplied by subshell!
#    for example: readonly var1=$(echo value1)
#                 local var1=$(echo value1)
#
#    declaration make exit code of assignment to be always 0,
#      aka. the exit code of command in subshell is discarded.
#      tested on bash 3.2.57/4.2.46

# NOTE: DO NOT declare var PROG as readonly, because its value is supplied by subshell.
PROG="$(basename "$0")"
readonly PROG_VERSION='2.5.0-dev'

usage() {
    cat <<EOF
Usage: ${PROG} [DIR]
Copy the svn remote url of local svn directory
DIR is local svn directory, default is current directory.

Example:
    ${PROG}
    ${PROG} /path/to/svn/work/dir

Options:
    -h, --help      display this help and exit
    -V, --version   display version information and exit
EOF
    # shellcheck disable=SC2086
    exit $1
}

progVersion() {
    echo "$PROG $PROG_VERSION"
    exit
}

################################################################################
# parse options
################################################################################

for a; do
    [[ "-h" == "$a" ||  "--help" == "$a" ]] && usage
done

for a; do
    [[ "-V" == "$a" ||  "--version" == "$a" ]] && progVersion
done

################################################################################
# biz logic
################################################################################

[ $# -gt 1 ]  && { echo At most 1 local directory is need! ; usage 1; }

readonly dir="${1:-.}"

# NOTE: DO NOT declare var url as readonly, because its value is supplied by subshell.
url="$(svn info "${dir}" | awk '/^URL: /{print $2}')"
if [ -z "${url}" ]; then
    echo "Fail to get svn url!"  1>&2
    exit 1
fi

copy() {
    case "$(uname)" in
    Darwin*)
        pbcopy ;;
    CYGWIN*|MINGW*)
        clip ;;
    *)
        xsel -b ;;
    esac
}

echo -n "${url}" | copy && echo "${url} copied!"