nixpkgs/pkgs/build-support/cc-wrapper/utils.sh
2017-04-25 13:29:43 +00:00

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skip () {
if [ -n "$NIX_DEBUG" ]; then
echo "skipping impure path $1" >&2
fi
}
# Checks whether a path is impure. E.g., `/lib/foo.so' is impure, but
# `/nix/store/.../lib/foo.so' isn't.
badPath() {
local p=$1
# Relative paths are okay (since they're presumably relative to
# the temporary build directory).
if [ "${p:0:1}" != / ]; then return 1; fi
# Otherwise, the path should refer to the store or some temporary
# directory (including the build directory).
test \
"$p" != "/dev/null" -a \
"${p:0:${#NIX_STORE}}" != "$NIX_STORE" -a \
"${p:0:4}" != "/tmp" -a \
"${p:0:${#NIX_BUILD_TOP}}" != "$NIX_BUILD_TOP"
}
# @args.rsp parser.
# Char classes: space, other, backslash, single quote, double quote.
# States: 0 - outside, 1/2 - unquoted arg/slash, 3/4 - 'arg'/slash, 5/6 - "arg"/slash.
# State transitions:
rspT=(01235 01235 11111 33413 33333 55651 55555)
# Push char on transition:
rspC[01]=1 rspC[11]=1 rspC[21]=1 rspC[33]=1 rspC[43]=1 rspC[55]=1 rspC[65]=1
rspParse() {
rsp=()
local s="$1"
local state=0
local arg=''
for (( i=0; i<${#s}; i++ )); do
local c="${s:$i:1}"
local cls=1
case "$c" in
' ' | $'\t' | $'\r' | $'\n') cls=0 ;;
'\') cls=2 ;;
"'") cls=3 ;;
'"') cls=4 ;;
esac
local nextstates="${rspT[$state]}"
local nextstate="${nextstates:$cls:1}"
if [ "${rspC[$state$nextstate]}" ]; then
arg+="$c"
elif [ "$state$nextstate" = "10" ]; then
rsp+=("$arg")
arg=''
fi
state="$nextstate"
done
if [ "$state" -ne 0 ]; then
rsp+=("$arg")
fi
}
expandResponseParams() {
params=()
while [ $# -gt 0 ]; do
local p="$1"
shift
if [ "${p:0:1}" = '@' -a -e "${p:1}" ]; then
rspParse "$(<"${p:1}")"
set -- "${rsp[@]}" "$@"
else
params+=("$p")
fi
done
}