shell 实现类似php的require_once函数

config.sh

#/bin/bash
require_once()
{
    #File the true path ,To prevent a symbolic link
    local realpath=$(readlink -f "$1")
    local basedir=$(dirname "$realpath")
    local file_full_name=$(basename  "$realpath")
    local file_name=$(remove_suffix "$file_full_name");
    #require file once
    if [ `echo "$FILE_COLLECTION"|sed -n "/$file_name/p"` ]; then
        return;
    fi  

    export FILE_COLLECTION=$FILE_COLLECTION:$file_name
    export PATH=$PATH:$basedir
    . "$file_full_name"
}
remove_suffix()
{
    local filename=$(basename "$1")
    echo "$filename" | sed 's/.sh$//'
}

main.sh

#/bin/bash
. ./config.sh
require_once 'module/go.sh'
require_once 'lib/function.sh'
started
iped

test@test:/data/tmp/bak/shell$ ./main.sh
started
started
iped