64 lines
1.3 KiB
Bash
64 lines
1.3 KiB
Bash
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# return an arbitrary directory path suffix
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# usage: dir_suffix num_of_path_elements [optional prefix]
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function dir_suffix() {
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num=${1:-1};
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prefix=${2:-".../"}
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cd=$(pwd)
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arr=( $(echo $cd | tr '/' ' ') );
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ret="";
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len=${#arr[*]}
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if [ $len -le $num ]; then
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echo $cd
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else
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for i in $(seq $len -1 $(expr $len - $num)); do
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ret="${arr[$i]}/$ret";
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done;
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ret_len=${#ret}
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echo "${prefix}${ret:0:$(expr $ret_len - 2)}";
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fi
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}
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# return an abbreviated version of a path
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# usage: abbr_path num_of_path_to_show [optional path]
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# abbr 2 /foo/bar/baz # /f/bar/baz
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function abbr_path() {
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path=${2:-$(pwd)}
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num=${1:-2}
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ret=""
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fc=${path:0:1}
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case $fc in
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"~")
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ret=$fc
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num=$(expr $num - 1)
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path=${path:1}
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;;
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"/")
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;;
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*)
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ret=$(expr $path : '^\([^\/]*\)\/')
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path=${path:${#ret}}
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ret=${ret:0:1}
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num=$(expr $num - 1)
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;;
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esac
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arr=( $(echo $path | tr '[A-Z]' '[a-z]' | tr '/' ' ') )
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len=${#arr[*]}
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if [ $len -le $num ]; then
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echo ${2:-$(pwd)}
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else
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if [ $num -gt 0 ]; then
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for i in $(seq 0 1 $(expr $len - $num - 1)); do
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el=${arr[$i]}
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el=${el:0:1}
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ret="$ret/$el"
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done
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fi
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for i in $(seq $(expr $len - $num) 1 $(expr $len - 1)); do
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el=${arr[$i]}
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ret="$ret/$el"
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done
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echo "$ret/";
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fi
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}
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