diff options
Diffstat (limited to 'pkgs/build-support/build-fhsenv-chroot/env.nix')
| -rw-r--r-- | pkgs/build-support/build-fhsenv-chroot/env.nix | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/pkgs/build-support/build-fhsenv-chroot/env.nix b/pkgs/build-support/build-fhsenv-chroot/env.nix new file mode 100644 index 00000000000..fbc50c2dc25 --- /dev/null +++ b/pkgs/build-support/build-fhsenv-chroot/env.nix @@ -0,0 +1,244 @@ +{ stdenv, lib, buildEnv, writeText, pkgs, pkgsi686Linux }: + +{ name +, profile ? "" +, targetPkgs ? pkgs: [] +, multiPkgs ? pkgs: [] +, extraBuildCommands ? "" +, extraBuildCommandsMulti ? "" +, extraOutputsToInstall ? [] +}: + +# HOWTO: +# All packages (most likely programs) returned from targetPkgs will only be +# installed once--matching the host's architecture (64bit on x86_64 and 32bit on +# x86). +# +# Packages (most likely libraries) returned from multiPkgs are installed +# once on x86 systems and twice on x86_64 systems. +# On x86 they are merged with packages from targetPkgs. +# On x86_64 they are added to targetPkgs and in addition their 32bit +# versions are also installed. The final directory structure looks as +# follows: +# /lib32 will include 32bit libraries from multiPkgs +# /lib64 will include 64bit libraries from multiPkgs and targetPkgs +# /lib will link to /lib32 + +let + is64Bit = stdenv.hostPlatform.parsed.cpu.bits == 64; + # multi-lib glibc is only supported on x86_64 + isMultiBuild = multiPkgs != null && stdenv.hostPlatform.system == "x86_64-linux"; + isTargetBuild = !isMultiBuild; + + # list of packages (usually programs) which are only be installed for the + # host's architecture + targetPaths = targetPkgs pkgs ++ (if multiPkgs == null then [] else multiPkgs pkgs); + + # list of packages which are installed for both x86 and x86_64 on x86_64 + # systems + multiPaths = multiPkgs pkgsi686Linux; + + # base packages of the chroot + # these match the host's architecture, glibc_multi is used for multilib + # builds. glibcLocales must be before glibc or glibc_multi as otherwiese + # the wrong LOCALE_ARCHIVE will be used where only C.UTF-8 is available. + basePkgs = with pkgs; + [ glibcLocales + (if isMultiBuild then glibc_multi else glibc) + (toString gcc.cc.lib) bashInteractiveFHS coreutils less shadow su + gawk diffutils findutils gnused gnugrep + gnutar gzip bzip2 xz + ]; + baseMultiPkgs = with pkgsi686Linux; + [ (toString gcc.cc.lib) + ]; + + etcProfile = writeText "profile" '' + export PS1='${name}-chrootenv:\u@\h:\w\$ ' + export LOCALE_ARCHIVE='/usr/lib/locale/locale-archive' + export LD_LIBRARY_PATH="/run/opengl-driver/lib:/run/opengl-driver-32/lib:/usr/lib:/usr/lib32''${LD_LIBRARY_PATH:+:}$LD_LIBRARY_PATH" + export PATH="/run/wrappers/bin:/usr/bin:/usr/sbin:$PATH" + export TZDIR='/etc/zoneinfo' + + # XDG_DATA_DIRS is used by pressure-vessel (steam proton) and vulkan loaders to find the corresponding icd + export XDG_DATA_DIRS=$XDG_DATA_DIRS''${XDG_DATA_DIRS:+:}/run/opengl-driver/share:/run/opengl-driver-32/share + + # Force compilers and other tools to look in default search paths + unset NIX_ENFORCE_PURITY + export NIX_CC_WRAPPER_TARGET_HOST_${stdenv.cc.suffixSalt}=1 + export NIX_CFLAGS_COMPILE='-idirafter /usr/include' + export NIX_CFLAGS_LINK='-L/usr/lib -L/usr/lib32' + export NIX_LDFLAGS='-L/usr/lib -L/usr/lib32' + export PKG_CONFIG_PATH=/usr/lib/pkgconfig + export ACLOCAL_PATH=/usr/share/aclocal + + ${profile} + ''; + + # Compose /etc for the chroot environment + etcPkg = stdenv.mkDerivation { + name = "${name}-chrootenv-etc"; + buildCommand = '' + mkdir -p $out/etc + cd $out/etc + + # environment variables + ln -s ${etcProfile} profile + + # compatibility with NixOS + ln -s /host/etc/static static + + # symlink nix config + ln -s /host/etc/nix nix + + # symlink some NSS stuff + ln -s /host/etc/passwd passwd + ln -s /host/etc/group group + ln -s /host/etc/shadow shadow + ln -s /host/etc/hosts hosts + ln -s /host/etc/resolv.conf resolv.conf + ln -s /host/etc/nsswitch.conf nsswitch.conf + + # symlink user profiles + ln -s /host/etc/profiles profiles + + # symlink sudo and su stuff + ln -s /host/etc/login.defs login.defs + ln -s /host/etc/sudoers sudoers + ln -s /host/etc/sudoers.d sudoers.d + + # symlink other core stuff + ln -s /host/etc/localtime localtime + ln -s /host/etc/zoneinfo zoneinfo + ln -s /host/etc/machine-id machine-id + ln -s /host/etc/os-release os-release + + # symlink PAM stuff + ln -s /host/etc/pam.d pam.d + + # symlink fonts stuff + ln -s /host/etc/fonts fonts + + # symlink ALSA stuff + ln -s /host/etc/asound.conf asound.conf + + # symlink SSL certs + mkdir -p ssl + ln -s /host/etc/ssl/certs ssl/certs + + # symlink /etc/mtab -> /proc/mounts (compat for old userspace progs) + ln -s /proc/mounts mtab + ''; + }; + + # Composes a /usr-like directory structure + staticUsrProfileTarget = buildEnv { + name = "${name}-usr-target"; + paths = [ etcPkg ] ++ basePkgs ++ targetPaths; + extraOutputsToInstall = [ "out" "lib" "bin" ] ++ extraOutputsToInstall; + ignoreCollisions = true; + postBuild = '' + if [[ -d $out/share/gsettings-schemas/ ]]; then + # Recreate the standard schemas directory if its a symlink to make it writable + if [[ -L $out/share/glib-2.0 ]]; then + target=$(readlink $out/share/glib-2.0) + rm $out/share/glib-2.0 + mkdir $out/share/glib-2.0 + ln -fs $target/* $out/share/glib-2.0 + fi + + if [[ -L $out/share/glib-2.0/schemas ]]; then + target=$(readlink $out/share/glib-2.0/schemas) + rm $out/share/glib-2.0/schemas + mkdir $out/share/glib-2.0/schemas + ln -fs $target/* $out/share/glib-2.0/schemas + fi + + mkdir -p $out/share/glib-2.0/schemas + + for d in $out/share/gsettings-schemas/*; do + # Force symlink, in case there are duplicates + ln -fs $d/glib-2.0/schemas/*.xml $out/share/glib-2.0/schemas + ln -fs $d/glib-2.0/schemas/*.gschema.override $out/share/glib-2.0/schemas + done + + # and compile them + ${pkgs.glib.dev}/bin/glib-compile-schemas $out/share/glib-2.0/schemas + fi + ''; + }; + + staticUsrProfileMulti = buildEnv { + name = "${name}-usr-multi"; + paths = baseMultiPkgs ++ multiPaths; + extraOutputsToInstall = [ "out" "lib" ] ++ extraOutputsToInstall; + ignoreCollisions = true; + }; + + # setup library paths only for the targeted architecture + setupLibDirs_target = '' + # link content of targetPaths + cp -rsHf ${staticUsrProfileTarget}/lib lib + ln -s lib lib${if is64Bit then "64" else "32"} + ''; + + # setup /lib, /lib32 and /lib64 + setupLibDirs_multi = '' + mkdir -m0755 lib32 + mkdir -m0755 lib64 + ln -s lib64 lib + + # copy glibc stuff + cp -rsHf ${staticUsrProfileTarget}/lib/32/* lib32/ && chmod u+w -R lib32/ + + # copy content of multiPaths (32bit libs) + [ -d ${staticUsrProfileMulti}/lib ] && cp -rsHf ${staticUsrProfileMulti}/lib/* lib32/ && chmod u+w -R lib32/ + + # copy content of targetPaths (64bit libs) + cp -rsHf ${staticUsrProfileTarget}/lib/* lib64/ && chmod u+w -R lib64/ + + # symlink 32-bit ld-linux.so + ln -Ls ${staticUsrProfileTarget}/lib/32/ld-linux.so.2 lib/ + ''; + + setupLibDirs = if isTargetBuild then setupLibDirs_target + else setupLibDirs_multi; + + # the target profile is the actual profile that will be used for the chroot + setupTargetProfile = '' + mkdir -m0755 usr + cd usr + ${setupLibDirs} + for i in bin sbin share include; do + if [ -d "${staticUsrProfileTarget}/$i" ]; then + cp -rsHf "${staticUsrProfileTarget}/$i" "$i" + fi + done + cd .. + + for i in var etc opt; do + if [ -d "${staticUsrProfileTarget}/$i" ]; then + cp -rsHf "${staticUsrProfileTarget}/$i" "$i" + fi + done + for i in usr/{bin,sbin,lib,lib32,lib64}; do + if [ -d "$i" ]; then + ln -s "$i" + fi + done + ''; + +in stdenv.mkDerivation { + name = "${name}-fhs"; + buildCommand = '' + mkdir -p $out + cd $out + ${setupTargetProfile} + cd $out + ${extraBuildCommands} + cd $out + ${lib.optionalString isMultiBuild extraBuildCommandsMulti} + ''; + preferLocalBuild = true; + allowSubstitutes = false; +} |