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131 lines
4.0 KiB
131 lines
4.0 KiB
# Accumulate suffixes for taking in the right input parameters with the `mangle*`
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# functions below. See setup-hook for details.
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accumulateRoles() {
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declare -ga role_suffixes=()
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if [ "${NIX_@wrapperName@_TARGET_BUILD_@suffixSalt@:-}" ]; then
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role_suffixes+=('_FOR_BUILD')
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fi
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if [ "${NIX_@wrapperName@_TARGET_HOST_@suffixSalt@:-}" ]; then
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role_suffixes+=('')
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fi
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if [ "${NIX_@wrapperName@_TARGET_TARGET_@suffixSalt@:-}" ]; then
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role_suffixes+=('_FOR_TARGET')
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fi
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}
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mangleVarListGeneric() {
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local sep="$1"
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shift
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local var="$1"
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shift
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local -a role_suffixes=("$@")
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local outputVar="${var}_@suffixSalt@"
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declare -gx ${outputVar}+=''
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# For each role we serve, we accumulate the input parameters into our own
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# cc-wrapper-derivation-specific environment variables.
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for suffix in "${role_suffixes[@]}"; do
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local inputVar="${var}${suffix}"
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if [ -v "$inputVar" ]; then
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export ${outputVar}+="${!outputVar:+$sep}${!inputVar}"
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fi
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done
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}
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mangleVarList() {
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mangleVarListGeneric " " "$@"
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}
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mangleVarBool() {
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local var="$1"
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shift
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local -a role_suffixes=("$@")
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local outputVar="${var}_@suffixSalt@"
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declare -gxi ${outputVar}+=0
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for suffix in "${role_suffixes[@]}"; do
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local inputVar="${var}${suffix}"
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if [ -v "$inputVar" ]; then
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# "1" in the end makes `let` return success error code when
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# expression itself evaluates to zero.
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# We don't use `|| true` because that would silence actual
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# syntax errors from bad variable values.
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let "${outputVar} |= ${!inputVar:-0}" "1"
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fi
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done
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}
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# Combine a singular value from all roles. If multiple roles are being served,
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# and the value differs in these roles then the request is impossible to
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# satisfy and we abort immediately.
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mangleVarSingle() {
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local var="$1"
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shift
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local -a role_suffixes=("$@")
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local outputVar="${var}_@suffixSalt@"
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for suffix in "${role_suffixes[@]}"; do
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local inputVar="${var}${suffix}"
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if [ -v "$inputVar" ]; then
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if [ -v "$outputVar" ]; then
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if [ "${!outputVar}" != "${!inputVar}" ]; then
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{
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echo "Multiple conflicting values defined for $outputVar"
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echo "Existing value is ${!outputVar}"
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echo "Attempting to set to ${!inputVar} via $inputVar"
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} >&2
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exit 1
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fi
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else
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declare -gx ${outputVar}="${!inputVar}"
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fi
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fi
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done
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}
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skip () {
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if (( "${NIX_DEBUG:-0}" >= 1 )); then
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echo "skipping impure path $1" >&2
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fi
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}
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# Checks whether a path is impure. E.g., `/lib/foo.so' is impure, but
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# `/nix/store/.../lib/foo.so' isn't.
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badPath() {
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local p=$1
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# Relative paths are okay (since they're presumably relative to
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# the temporary build directory).
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if [ "${p:0:1}" != / ]; then return 1; fi
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# Otherwise, the path should refer to the store or some temporary
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# directory (including the build directory).
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test \
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"$p" != "/dev/null" -a \
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"${p#${NIX_STORE}}" = "$p" -a \
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"${p#${NIX_BUILD_TOP}}" = "$p" -a \
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"${p#/tmp}" = "$p" -a \
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"${p#${TMP:-/tmp}}" = "$p" -a \
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"${p#${TMPDIR:-/tmp}}" = "$p" -a \
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"${p#${TEMP:-/tmp}}" = "$p" -a \
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"${p#${TEMPDIR:-/tmp}}" = "$p"
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}
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expandResponseParams() {
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declare -ga params=("$@")
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local arg
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for arg in "$@"; do
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if [[ "$arg" == @* ]]; then
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# phase separation makes this look useless
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# shellcheck disable=SC2157
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if [ -x "@expandResponseParams@" ]; then
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# params is used by caller
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#shellcheck disable=SC2034
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readarray -d '' params < <("@expandResponseParams@" "$@")
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return 0
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fi
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fi
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done
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}
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