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https://github.com/elitak/nixos-infect
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more refactoring, curl fallback to wget
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Eric Litak
parent
cad9b43b69
commit
0b48e18a3a
1 changed files with 65 additions and 29 deletions
94
nixos-infect
94
nixos-infect
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@ -135,7 +135,7 @@ EOF
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#
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# then you can add the files in configuration.nix's imports above and run something like:
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# cat customConfig nixos-infect | root@targethost bash
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if [[ `type -t customConfig` == "function" ]]; then customConfig; fi
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if [[ "$(type -t customConfig)" == "function" ]]; then customConfig; fi
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}
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makeSwap() {
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@ -148,40 +148,74 @@ makeSwap() {
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}
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prepareEnv() {
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which dnf && dnf install -y perl-Digest-SHA # Fedora 24
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which bzcat || (which yum && yum install -y bzip2) # CentOS
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# $disk is used in makeConf()
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disk=$( (test -e /dev/vda && echo vda)
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|| (test -e /dev/sda && echo sda) )
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for disk in vda sda; do [[ -e /dev/$disk ]] && break; done
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# DigitalOcean doesn't seem to set USER while running user data
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export USER="root"
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export HOME="/root"
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# FIXME run only if necessary
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groupadd -r nixbld -g 30000 || true
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seq 1 10 | xargs -I{} useradd -c "Nix build user {}" -d /var/empty -g nixbld -G nixbld -M -N -r -s `which nologin` nixbld{} || true
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# Use adapted wget if curl is missing
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which curl || { \
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curl() {
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eval "wget $(
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(local isStdout=1
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for arg in "$@"; do
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case "$arg" in
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"-o")
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echo "-O";
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isStdout=0
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;;
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"-O")
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isStdout=0
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;;
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"-L")
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;;
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*)
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echo "$arg"
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;;
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esac
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done;
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[[ $isStdout -eq 1 ]] && echo "-O-"
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)| tr '\n' ' '
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)"
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}; export -f curl; }
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# Nix installer tries to use sudo regardless of whether we're already uid 0
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#which sudo || { sudo() { eval "$@"; }; export -f sudo; }
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mkdir -p -m 0755 /nix
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}
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req() {
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type "$1" > /dev/null 2>&1 || which "$1" > /dev/null 2>&1
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}
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checkEnv() {
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# TODO: use wget -O- if available instead of curl. This involves patching the
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# /nix/install script to not check for curl and use `wget -O` instead of
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# `curl -L # -o`
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( which curl || echo "ERROR: Missing curl" ) && \
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( which bzcat || echo "ERROR: Missing bzcat" ) && \
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( which perl || echo "ERROR: Missing perl" )
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# Perform some easy fixups before checking
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which dnf && dnf install -y perl-Digest-SHA # Fedora 24
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which bzcat || (which yum && yum install -y bzip2) # CentOS
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[[ "$(whoami)" == "root" ]] || { echo "ERROR: Must run as root"; return 1; }
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( req curl || req wget || echo "ERROR: Missing both curl and wget" ) && \
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( req bzcat || echo "ERROR: Missing bzcat" ) && \
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( req perl || echo "ERROR: Missing perl" ) && \
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( req groupadd || echo "ERROR: Missing groupadd" ) && \
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( req useradd || echo "ERROR: Missing useradd" ) \
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|| return 1
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}
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infect() {
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makeConf
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makeSwap # smallest (512MB) droplet needs extra memory!
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# Add nix build users
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# FIXME run only if necessary, rather than defaulting true
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groupadd -r nixbld -g 30000 || true
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for i in {1..10}; do useradd -c "Nix build user $i" -d /var/empty -g nixbld -G nixbld -M -N -r -s $(which nologin) nixbld$i || true; done
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curl https://nixos.org/nix/install | sh
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curl https://nixos.org/nix/install | $SHELL
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source ~/.nix-profile/etc/profile.d/nix.sh
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[ -z "$NIX_CHANNEL"] && NIX_CHANNEL="nixos-16.09"
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[[ -z "$NIX_CHANNEL" ]] && NIX_CHANNEL="nixos-16.09"
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nix-channel --remove nixpkgs
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nix-channel --add "https://nixos.org/channels/$NIX_CHANNEL" nixos
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nix-channel --update
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@ -198,20 +232,22 @@ infect() {
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rm -fv /nix/var/nix/profiles/default*
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/nix/var/nix/profiles/system/sw/bin/nix-collect-garbage
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# Follow the symlinks
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[ -L /etc/resolv.conf ] && mv -v /etc/resolv.conf /etc/resolv.conf.lnk && cat /etc/resolv.conf.lnk > /etc/resolv.conf
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# Reify resolv.conf
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[[ -L /etc/resolv.conf ]] && mv -v /etc/resolv.conf /etc/resolv.conf.lnk && cat /etc/resolv.conf.lnk > /etc/resolv.conf
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# Staging for the Nix coup d'état
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# Stage the Nix coup d'état
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touch /etc/NIXOS
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cat > /etc/NIXOS_LUSTRATE << EOF
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etc/nixos
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etc/resolv.conf
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root/.nix-defexpr/channels
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EOF
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echo etc/nixos > /etc/NIXOS_LUSTRATE
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echo etc/resolv.conf >> /etc/NIXOS_LUSTRATE
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echo root/.nix-defexpr/channels >> /etc/NIXOS_LUSTRATE
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rm -rf /boot.bak && mv -v /boot /boot.bak &&
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rm -rf /boot.bak && mv -v /boot /boot.bak && \
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/nix/var/nix/profiles/system/bin/switch-to-configuration boot
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}
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prepareEnv
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checkEnv && infect && reboot
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checkEnv
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makeConf
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makeSwap # smallest (512MB) droplet needs extra memory!
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infect
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reboot
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