lkhh-new

#! /bin/bash

_rootdir=${_rootdir:-"$(dirname "$(readlink -f "$0")")"}
_ver="0.0.1-dev"
#_author="Wei Peng <me@1pengw.com>"

source "${_rootdir}/_shared_prologue"

#
# parameters
#
declare template=${template:-lkm_barebone}
declare project=${project:-mylkm}
declare author=${author:-$( (
    # start subshell to contain env pollution
    name=$(git config user.name);
    : ${name:=$(whoami)};
    echo $name;
    ) )}
declare license=${license:-GPL}
declare -i force=${force:-0}

#
# getopt processing
#
function my_getopt_cont () {
    local n_shift=1 # number of shifts in the outer loop; shift by 1 by default
    case "$1" in
        -t|--template)
            shift
            template=$1
            n_shift=2
            ;;
        -p|--project)
            shift
            project=$1
            n_shift=2
            ;;
        -a|--author)
            shift
            author=$1
            n_shift=2
            ;;
        -l|--license)
            shift
            license=$1
            n_shift=2
            ;;
        -f|--force)
            force=1
            n_shift=1
            ;;
    esac
    return $n_shift
}

my_getopt "t:p:a:l:f" "template:,project:,author:,license:,force" "my_getopt_cont" "Create a new project from template." "$(
cat <<END
[-t|--template=<template>] [-p|--project=<project>]
    [-a|--author=<author>] [-l|--license=<license>]
    [-f|--force]
END
)" "$(
cat <<END
-t	--template		Template from which project is created (default: $template).
-p	--project		Project name; any sequence of non-C-symbol chars is replaced with underscore/_ (default: $project).
-a	--author		Author (default: $author).
-l	--license		License (default: $license).
-f	--force		Forcibly create a new project even it already exists (default: $force).
END
)" "$@"
ret=$?
eval set -- "$_getopt"
shift $ret

#
# normalization
#

# normalize project name for use in C source code
project=$(echo "$project" | sed 's/[^[:alnum:]_]\+/_/g; s/^[[:digit:]]\+/_/g;')


#
# sanity check
#

vecho 0 <<END
$(
dumpparam <<END1
$(
for name in template project author license force; do
    echo "$name=$(echo $(eval "echo \$$name"))"
done
)
END1
)
END

template_dir="$_rootdir/templates/$template"
[[ -d "$template_dir" ]] || die 1 <<END
No such template: $template.
END

[[ -d "$project" ]] && (( force == 0 )) && die 1 <<END
$project already exists; force (-f) or try a new project.
END

mkdir -p "$project"
pushd "$project" &>/dev/null
cp -r "$template_dir/"* . || die 1 <<END
Fail to create $project from $template.
END
popd &>/dev/null

[[ -d "$project" ]] || die 1 <<END
Project $project is not created.
END

#
# Substitute
#

find $project -type f -name '*.template' | while IFS= read f; do 
    sed -i -e "s/<PROJECT>/$project/g; s/<AUTHOR>/$author/g; s/<LICENSE>/$license/g;" "$f"
    rename '.template' '' "$f"
done

# evaluate rest of arguments after creating 
eval "$@"