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skip () {
if test "$NIX_DEBUG" = "1"; 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=$1
# Relative paths are okay (since they're presumably relative to
# the temporary build directory).
if test "${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"
}
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