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improve installation scripting:

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further improve scripting robustness, add fs.disks.devices.partitionDuringInstallation, ad fs.zfs.datasets.*.recursiveProps, add deploy-system-to-hetzner-vps install script
This commit is contained in:
Niklas Gollenstede
2023-05-02 02:13:24 +02:00
parent c001ad7f51
commit dd8fc696f4
20 changed files with 317 additions and 242 deletions
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16
lib/setup-scripts/utils.sh
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@ -93,18 +93,30 @@ function prompt-new-password {( set -u # 1: usage
)}
## Runs an installer hook script, optionally stepping through the script.
function run-hook-script {( set -eu # 1: title, 2: scriptPath
function run-hook-script {( # 1: title, 2: scriptPath
trap - EXIT # start with empty traps for sub-shell
if [[ ${args[inspectScripts]:-} && "$(cat "$2")" != $'' ]] ; then
echo "Running $1 commands. For each command printed, press Enter to continue or Ctrl+C to abort the installation:" 1>&2
# (this does not help against intentionally malicious scripts, it's quite easy to trick this)
BASH_PREV_COMMAND= ; set -o functrace ; trap 'if [[ $BASH_COMMAND != "$BASH_PREV_COMMAND" ]] ; then echo -n "> $BASH_COMMAND" >&2 ; read ; fi ; BASH_PREV_COMMAND=$BASH_COMMAND' debug
fi
set -e # The called script snippets should not rely on this, but neither should this function rely on the scripts correctly exiting on errors.
source "$2"
)}
## Lazily builds a nix derivation at run time, instead of when building the script.
# When maybe-using packages that take long to build, instead of »at{some.package.out}«, use: »$( build-lazy at{some.package.drvPath!unsafeDiscardStringContext} out )«
function build-lazy { # 1: drvPath, 2?: output
PATH=$PATH:@{native.openssh}/bin @{native.nix}/bin/nix --extra-experimental-features nix-command build --no-link --json ${args[quiet]:+--quiet} $1 | @{native.jq}/bin/jq -r .[0].outputs.${2:-out}
# Nix v2.14 introduced a new syntax for selecting the output of multi-output derivations, v2.15 then changed the default when passing the path to an on-disk derivation. »--print-out-paths« is also not available in older versions.
if version-gr-eq "@{native.nix.version}" '2.14' ; then
PATH=$PATH:@{native.openssh}/bin @{native.nix}/bin/nix --extra-experimental-features nix-command build --no-link --print-out-paths ${args[quiet]:+--quiet} "$1"'^'"${2:-out}"
else
PATH=$PATH:@{native.openssh}/bin @{native.nix}/bin/nix --extra-experimental-features nix-command build --no-link --json ${args[quiet]:+--quiet} "$1" | @{native.jq}/bin/jq -r .[0].outputs."${2:-out}"
fi
}
## Tests whether (returns 0/success if) the first version argument is greater/less than (or equal) the second version argument.
function version-gr-eq { printf '%s\n%s' "$1" "$2" | sort -C -V -r; }
function version-lt-eq { printf '%s\n%s' "$1" "$2" | sort -C -V ; }
function version-gt { ! version-gt-eq "$2" "$1" ; }
function version-lt { ! version-lt-eq "$2" "$1" ; }