37 lines
1.1 KiB
Bash
Executable File
37 lines
1.1 KiB
Bash
Executable File
#! /bin/sh -
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# POSIX-compliant shell script to print the PATH (or the variable expanded by pathvar)
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# contents line by line, without duplicated, in order, without empty lines.
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__arrvar="__arr_random_n8241vn81y39c"
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in_list () {
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max_idx="$(($1))"
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arg="$(printf %s "$2" | sed 's|/\+|/|g; s|/$||')"
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[ "$max_idx" -ge 1 ] || return 1
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[ -n "$arg" ] || return 2
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idx_in_list=0
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while [ "$idx_in_list" -le "$max_idx" ]; do
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val="$(eval "printf %s "'"'"\$${__arrvar}_$idx_in_list"'"')"
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[ "$val" = "${arg}" ] && return 0
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idx_in_list="$((idx_in_list+1))"
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done
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return 1
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}
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[ -n "${1}" ] && pathvar="${1}" || pathvar="PATH"
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idx=0
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printf "%s\n" "$(eval "printf %s "'"'"\$$pathvar"'"'"")" | sed "s/^:\+//; s/:\+$//; s/:\+/\n/g" | while IFS= read -r line; do
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eval "unset ${__arrvar}_$idx"
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idx="$((idx+1))"
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done
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idx=0
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printf "%s\n" "$(eval "printf %s "'"'"\$$pathvar"'"'"")" | sed "s/^:\+//; s/:\+$//; s/:\+/\n/g" | while IFS= read -r line; do
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line="$(printf %s "$line" | sed 's|/\+|/|g; s|/$||')"
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in_list "$idx" "$line" && continue
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printf "%s\n" "$line"
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eval "${__arrvar}_$idx=\$line"
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idx="$((idx+1))"
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done
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