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63 lines
1.2 KiB
63 lines
1.2 KiB
#!/bin/bash
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# vars {{{ #
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shuffle_cache="shuffle.txt"
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regen_flag=0
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dir=""
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# }}} vars #
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# usage_msg {{{ #
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function usage_msg() {
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# echo "usage: shuffler [-r] [dir_name]"
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cat <<-EOF
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Usage: shuffler [-r] [dir_name]
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-r: regenerate the shuffle cache
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EOF
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}
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# }}} usage_msg #
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# parse for regen_flag{{{
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while getopts ":r" opt; do
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case $opt in
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r)
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echo "-r was triggered!" >&2
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regen_flag=1
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;;
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\?)
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echo "Invalid flag: -$OPTARG" >&2
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usage_msg
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exit 1
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;;
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esac
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done
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#}}}
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# set dir {{{ #
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shift $((OPTIND-1))
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# if no dir, use pwd
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if [[ "$#" -eq 0 ]]; then
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dir=$(pwd)
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elif [[ "$#" -gt 1 ]] || [[ ! -d "$1" ]]; then
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usage_msg
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exit 1
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else
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dir="$1"
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fi
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# }}} set dir #
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# rebuild shuffle cache if regen_flag, doesn't exist or file empty
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if [[ "$regen_flag" -eq 1 ]] || [[ ! -f "$dir"/"$shuffle_cache" ]] || \
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[[ $(wc -l "$dir"/"$shuffle_cache" | awk '{print $1}') -eq 0 ]]; then
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# if [[ "$regen_flag" -eq 1 ]]; then
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find "$dir"/* ! -name "$shuffle_cache" -type f | shuf > "$dir"/"$shuffle_cache"
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fi
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head -n 1 "$dir"/"$shuffle_cache"
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printf '%s\n\n' "$(sed '1d' "$dir"/"$shuffle_cache")" > "$dir"/"$shuffle_cache"
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# vim: set tabstop=2 shiftwidth=2 expandtab:
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