60 lines
1.1 KiB
Bash
60 lines
1.1 KiB
Bash
set -e
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set -x
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# Restore the original variables.
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export NIX_BUILD_TOP=$1
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. $NIX_BUILD_TOP/initial-env-vars
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export PATH=$(< $NIX_BUILD_TOP/path)
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export NIX_STORE=/nix/store # !!! assuming that Nix store = /nix/store
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cd $NIX_BUILD_TOP
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root=$NIX_BUILD_TOP/root
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echo "remounting / writeable..."
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mount -n -o remount,rw dummy /
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exec > log 2>&1
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echo "creating /dev..."
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mount -n -t tmpfs none /dev
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mknod /dev/ubd0 b 98 0
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echo "mounting image on $root..."
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mkdir root
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mount -n -t ext2 /dev/ubd0 $root
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echo "switching roots"
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mkdir $root/hostfs
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# Make the Nix store available in the UML file system as a symlink to /hostfs/$NIX_STORE.
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mkdir -p $root/$(dirname $NIX_STORE)
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ln -s /hostfs/$NIX_STORE $root/$NIX_STORE
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$utillinux/sbin/pivot_root $root $root/hostfs
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cd /
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# !!! we should also chroot here (according to the pivot_root manpage)
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echo "mounting /proc..."
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mount -n -t proc none /proc
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#mount --bind /hostfs/tmp /tmp
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cd /tmp
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export TMPDIR=/tmp
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export TMP_DIR=/tmp
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#cd $NIX_BUILD_TOP
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# Call the actual builder.
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if sh -e $actualBuilder; then
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touch /hostfs/$NIX_BUILD_TOP/success
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fi
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echo "syncing..."
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sync
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echo "halting..."
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$sysvinit/sbin/halt -d -f
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