mangleVarList() { local var="$1" shift local -a role_infixes=("$@") local outputVar="${var/+/_@infixSalt@_}" declare -gx ${outputVar}+='' # For each role we serve, we accumulate the input parameters into our own # cc-wrapper-derivation-specific environment variables. for infix in "${role_infixes[@]}"; do local inputVar="${var/+/${infix}}" if [ -v "$inputVar" ]; then export ${outputVar}+="${!outputVar:+ }${!inputVar}" fi done } mangleVarBool() { local var="$1" shift local -a role_infixes=("$@") local outputVar="${var/+/_@infixSalt@_}" declare -gxi ${outputVar}+=0 for infix in "${role_infixes[@]}"; do local inputVar="${var/+/${infix}}" if [ -v "$inputVar" ]; then # "1" in the end makes `let` return success error code when # expression itself evaluates to zero. # We don't use `|| true` because that would silence actual # syntax errors from bad variable values. let "${outputVar} |= ${!inputVar:-0}" "1" fi done } skip () { if (( "${NIX_DEBUG:-0}" >= 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=$1 # Relative paths are okay (since they're presumably relative to # the temporary build directory). if [ "${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" } expandResponseParams() { declare -ga params=("$@") local arg for arg in "$@"; do if [[ "$arg" == @* ]]; then # phase separation makes this look useless # shellcheck disable=SC2157 if [ -x "@expandResponseParams@" ]; then # params is used by caller #shellcheck disable=SC2034 readarray -d '' params < <("@expandResponseParams@" "$@") return 0 else echo "Response files aren't supported during bootstrapping" >&2 return 1 fi fi done }