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substituteAll: Enumerate environment variables more reliably

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Getting the names of all environment variables is tricky. The previous
implementation easily got confused by multi-line variables. The new
one is more reliable but not still not perfect.

This works around a segfault in Bash 4.3, where the expression
"${!var}" (where var="-9") crashes under certain conditions.

http://hydra.nixos.org/build/16693445
This commit is contained in:
Eelco Dolstra 2014-11-10 13:35:09 +01:00
parent 103f5658a4
commit 78b01de68d
1 changed files with 1 additions and 1 deletions
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2
pkgs/stdenv/generic/setup.sh
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@ -386,7 +386,7 @@ substituteAll() {
local output="$2"
# Select all environment variables that start with a lowercase character.
for envVar in $(env | sed "s/^[^a-z].*//" | sed "s/^\([^=]*\)=.*/\1/"); do
for envVar in $(env | sed -e $'s/^\([a-z][^=]*\)=.*/\\1/; t \n d'); do
if [ "$NIX_DEBUG" = "1" ]; then
echo "$envVar -> ${!envVar}"
fi