diff options
Diffstat (limited to 'pkgs/build-support/pkg-config-wrapper')
4 files changed, 188 insertions, 0 deletions
diff --git a/pkgs/build-support/pkg-config-wrapper/add-flags.sh b/pkgs/build-support/pkg-config-wrapper/add-flags.sh new file mode 100644 index 000000000000..35ecf62ca230 --- /dev/null +++ b/pkgs/build-support/pkg-config-wrapper/add-flags.sh @@ -0,0 +1,12 @@ +# See cc-wrapper for comments. +var_templates_list=( + PKG_CONFIG_PATH +) + +accumulateRoles + +for var in "${var_templates_list[@]}"; do + mangleVarList "$var" ${role_suffixes[@]+"${role_suffixes[@]}"} +done + +export NIX_PKG_CONFIG_WRAPPER_FLAGS_SET_@suffixSalt@=1 diff --git a/pkgs/build-support/pkg-config-wrapper/default.nix b/pkgs/build-support/pkg-config-wrapper/default.nix new file mode 100644 index 000000000000..e01df107dd17 --- /dev/null +++ b/pkgs/build-support/pkg-config-wrapper/default.nix @@ -0,0 +1,126 @@ +# The wrapper script ensures variables like PKG_CONFIG_PATH and +# PKG_CONFIG_PATH_FOR_BUILD work properly. + +{ stdenvNoCC +, buildPackages +, pkg-config +, baseBinName ? "pkg-config" +, propagateDoc ? pkg-config != null && pkg-config ? man +, extraPackages ? [], extraBuildCommands ? "" +}: + +with stdenvNoCC.lib; + +let + stdenv = stdenvNoCC; + inherit (stdenv) hostPlatform targetPlatform; + + # Prefix for binaries. Customarily ends with a dash separator. + # + # TODO(@Ericson2314) Make unconditional, or optional but always true by + # default. + targetPrefix = stdenv.lib.optionalString (targetPlatform != hostPlatform) + (targetPlatform.config + "-"); + + # See description in cc-wrapper. + suffixSalt = replaceStrings ["-" "."] ["_" "_"] targetPlatform.config; + +in + +stdenv.mkDerivation { + pname = targetPrefix + pkg-config.pname + "-wrapper"; + inherit (pkg-config) version; + + preferLocalBuild = true; + + shell = getBin stdenvNoCC.shell + stdenvNoCC.shell.shellPath or ""; + + inherit targetPrefix suffixSalt baseBinName; + + outputs = [ "out" ] ++ optionals propagateDoc ([ "man" ] ++ optional (pkg-config ? doc) "doc"); + + passthru = { + inherit pkg-config; + }; + + dontBuild = true; + dontConfigure = true; + + unpackPhase = '' + src=$PWD + ''; + + installPhase = + '' + mkdir -p $out/bin $out/nix-support + + wrap() { + local dst="$1" + local wrapper="$2" + export prog="$3" + substituteAll "$wrapper" "$out/bin/$dst" + chmod +x "$out/bin/$dst" + } + + echo $pkg-config > $out/nix-support/orig-pkg-config + + wrap ${targetPrefix}${baseBinName} ${./pkg-config-wrapper.sh} "${getBin pkg-config}/bin/${baseBinName}" + '' + # symlink in share for autoconf to find macros + + # TODO(@Ericson2314): in the future just make the unwrapped pkg-config a + # propagated dep once we can rely on downstream deps comming first in + # search paths. (https://github.com/NixOS/nixpkgs/pull/31414 took a crack + # at this.) + + '' + ln -s ${pkg-config}/share $out/share + ''; + + strictDeps = true; + + wrapperName = "PKG_CONFIG_WRAPPER"; + + setupHooks = [ + ../setup-hooks/role.bash + ./setup-hook.sh + ]; + + postFixup = + ## + ## User env support + ## + + # Propagate the underling unwrapped pkg-config so that if you + # install the wrapper, you get anything else it might provide. + '' + printWords ${pkg-config} > $out/nix-support/propagated-user-env-packages + '' + + ## + ## Man page and doc support + ## + + optionalString propagateDoc ('' + ln -s ${pkg-config.man} $man + '' + optionalString (pkg-config ? doc) '' + ln -s ${pkg-config.doc} $doc + '') + + + '' + substituteAll ${./add-flags.sh} $out/nix-support/add-flags.sh + substituteAll ${../wrapper-common/utils.bash} $out/nix-support/utils.bash + '' + + ## + ## Extra custom steps + ## + + extraBuildCommands; + + meta = + let pkg-config_ = if pkg-config != null then pkg-config else {}; in + (if pkg-config_ ? meta then removeAttrs pkg-config.meta ["priority"] else {}) // + { description = + stdenv.lib.attrByPath ["meta" "description"] "pkg-config" pkg-config_ + + " (wrapper script)"; + priority = 10; + }; +} diff --git a/pkgs/build-support/pkg-config-wrapper/pkg-config-wrapper.sh b/pkgs/build-support/pkg-config-wrapper/pkg-config-wrapper.sh new file mode 100644 index 000000000000..f7c7429eb0b3 --- /dev/null +++ b/pkgs/build-support/pkg-config-wrapper/pkg-config-wrapper.sh @@ -0,0 +1,21 @@ +#! @shell@ +set -eu -o pipefail +o posix +shopt -s nullglob + +if (( "${NIX_DEBUG:-0}" >= 7 )); then + set -x +fi + +source @out@/nix-support/utils.bash + +if [ -z "${NIX_PKG_CONFIG_WRAPPER_FLAGS_SET_@suffixSalt@:-}" ]; then + source @out@/nix-support/add-flags.sh +fi + +if (( ${#role_suffixes[@]} > 0 )); then + # replace env var with nix-modified one + PKG_CONFIG_PATH=$PKG_CONFIG_PATH_@suffixSalt@ exec @prog@ "$@" +else + # pkg-config isn't a bonafied dependency so ignore setup hook entirely + exec @prog@ "$@" +fi diff --git a/pkgs/build-support/pkg-config-wrapper/setup-hook.sh b/pkgs/build-support/pkg-config-wrapper/setup-hook.sh new file mode 100644 index 000000000000..34f1a999a82e --- /dev/null +++ b/pkgs/build-support/pkg-config-wrapper/setup-hook.sh @@ -0,0 +1,29 @@ +# pkg-config Wrapper hygiene +# +# See comments in cc-wrapper's setup hook. This works exactly the same way. + +# Skip setup hook if we're neither a build-time dep, nor, temporarily, doing a +# native compile. +# +# TODO(@Ericson2314): No native exception +[[ -z ${strictDeps-} ]] || (( "$hostOffset" < 0 )) || return 0 + +pkgConfigWrapper_addPkgConfigPath () { + # See ../setup-hooks/role.bash + local role_post + getHostRoleEnvHook + + addToSearchPath "PKG_CONFIG_PATH${role_post}" "$1/lib/pkgconfig" + addToSearchPath "PKG_CONFIG_PATH${role_post}" "$1/share/pkgconfig" +} + +# See ../setup-hooks/role.bash +getTargetRole +getTargetRoleWrapper + +addEnvHooks "$targetOffset" pkgConfigWrapper_addPkgConfigPath + +export PKG_CONFIG${role_post}=@targetPrefix@@baseBinName@ + +# No local scope in sourced file +unset -v role_post |