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annotate .shell.d/00.path_manipulation.sh @ 485:e4d4cd0d120e

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zsh: start using mcfly for ^R history search This is a modified version of mcfly.zsh from upstream 422557e1ba48c33c5753262bd294bf3e92a40476. I then expect to install mcfly using cargo.
author Augie Fackler <raf@durin42.com>
date Tue, 30 Jun 2020 10:37:13 -0400
parents c85072e620a8
children 10811c923fc0
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1 # Functions for manipulating $PATH. Split out so I can use them in .zshenv if I want.
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2
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3 function insert_path_element() {
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4 insert_element_into_var $1 PATH
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5 }
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7 function remove_path_element() {
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8 remove_element_from_var $1 PATH
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9 }
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10
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11 function insert_element_into_var () {
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12 eval varcontents=\$"$2"
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13 eval varname="$2"
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14 newcomp="$1"
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15 if echo "$varcontents" | grep "$newcomp:" >> /dev/null; then
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16 true
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17 elif [[ "$varcontents" == "" ]] ; then
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18 export $varname="$newcomp"
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19 else
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20 export $varname="$newcomp:$varcontents"
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21 fi
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22 }
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23
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24 function remove_element_from_var() {
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25 eval varcontents=\$"$2"
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26 eval varname="$2"
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27 newcomp="$1"
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28 if echo "$varcontents" | grep "$newcomp:" >> /dev/null; then
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29 export $varname="`echo $varcontents | sed s%$newcomp:%%`"
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30 elif [[ "$varcontents" == "$newcomp" ]] ; then
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31 unset $varname
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32 else
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33 echo $1 not in $varname
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34 fi
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35 }
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37 function append_path_element() {
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38 export PATH="${PATH}:$1"
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39 }