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annotate .shell.d/00.path_manipulation.sh @ 377:117e3c11d953

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zprofile: introduce zprofile use El Capitan (OS X 10.11) introduces a system-level /etc/zprofile which uses a path_helper thing to mangle $PATH. Unfortunately, the way path_helper works, it forces /usr/local/bin and /usr/bin to the *start* of the PATH variable, which means that any PATH mutations I want have to run after /etc/zprofile calls path_helper. As such, move my path insertions into .zprofile{,-machine} rather than .zshenv{,-machine} so that I can still ensure my path entries are at the start of PATH rather than the end. This works because: > Commands are then read from $ZDOTDIR/.zshenv. If the shell is a > login shell, commands are read from /etc/zprofile and then > $ZDOTDIR/.zprofile. Then, if the shell is interactive, commands > are read from /etc/zshrc and then $ZDOTDIR/.zshrc. Finally, if the > shell is a login shell, /etc/zlogin and $ZDOTDIR/.zlogin are read. This means that non-login shells no longer pick up my custom PATH entries, but as I only use OS X as a desktop OS that seems like a workable tradeoff for now.
author Augie Fackler <raf@durin42.com>
date Sun, 31 Jan 2016 20:46:29 -0500
parents 7dfb7799567f
children c85072e620a8
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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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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 }