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Diffstat (limited to 'pkgs/build-support/wrapper-common/utils.bash')
-rw-r--r-- | pkgs/build-support/wrapper-common/utils.bash | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/pkgs/build-support/wrapper-common/utils.bash b/pkgs/build-support/wrapper-common/utils.bash new file mode 100644 index 000000000000..12b596a83e6f --- /dev/null +++ b/pkgs/build-support/wrapper-common/utils.bash @@ -0,0 +1,95 @@ +# Accumulate infixes for taking in the right input parameters with the `mangle*` +# functions below. See setup-hook for details. +accumulateRoles() { + declare -ga role_infixes=() + if [ "${NIX_@wrapperName@_@infixSalt@_TARGET_BUILD:-}" ]; then + role_infixes+=(_BUILD_) + fi + if [ "${NIX_@wrapperName@_@infixSalt@_TARGET_HOST:-}" ]; then + role_infixes+=(_) + fi + if [ "${NIX_@wrapperName@_@infixSalt@_TARGET_TARGET:-}" ]; then + role_infixes+=(_TARGET_) + fi +} + +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 +} |