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stdenv substituteAll: use more robust code

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The set/env fix in #14907 wasn't very good, so let's use a null-delimited
approach. Suggested by Aszlig.
In particular, this should fix a mass-breakage on Darwin, though I was
unable to test that.
This commit is contained in:
Vladimír Čunát 2016-04-29 11:22:47 +02:00
parent 717670720f
commit 9e0d0423fe
1 changed files with 11 additions and 8 deletions
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19
pkgs/stdenv/generic/setup.sh
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@ -409,7 +409,7 @@ substitute() {
if [ "$p" = --subst-var ]; then
varName="${params[$((n + 1))]}"
# check if the used nix attribute name is a valid bash name
if ! [[ "$varName" =~ ^[a-zA-Z_]+[a-zA-Z0-9_]*$ ]]; then
if ! [[ "$varName" =~ ^[a-zA-Z_][a-zA-Z0-9_]*$ ]]; then
echo "substitution variables must be valid bash names, \"$varName\" isn't."
exit 1;
fi
@ -439,20 +439,23 @@ substituteInPlace() {
}
# Substitute all environment variables that do not start with an upper-case
# character or underscore. Note: other names that aren't bash-valid
# will cause an error during `substitute --subst-var`.
substituteAll() {
local input="$1"
local output="$2"
local -a args=()
# Select all environment variables that start with a lowercase character.
# Will not work with nix attribute names (and thus env variables) containing '\n'.
for envVar in $(set | sed -e $'s/^\([a-z][^=]*\)=.*/\\1/; t \n d'); do
# We need to be careful due to vars with multi-line contents or weird names.
while IFS= read -r -d '' varName; do
if [ "$NIX_DEBUG" = "1" ]; then
echo "$envVar -> ${!envVar}"
echo "@varName@ -> '${varName}'"
fi
args="$args --subst-var $envVar"
done
args+=("--subst-var" "$varName")
done < <(env -0 | cut -z -d= -f1 | grep -z -v '^[_A-Z]')
substitute "$input" "$output" $args
substitute "$input" "$output" "${args[@]}"
}