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-rw-r--r--lib/prelude.sh64
1 files changed, 63 insertions, 1 deletions
diff --git a/lib/prelude.sh b/lib/prelude.sh
index 00fa92a4e..98cbea06c 100644
--- a/lib/prelude.sh
+++ b/lib/prelude.sh
@@ -1,14 +1,56 @@
+# clone_or_update : [user@]hostname x local_dir x git_url x git_rev -> ()
+clone_or_update() {(
+ target=$1
+ nixpkgs_dir=$2
+ git_url=$3
+ git_rev=$4
+
+ echo '
+ set -euf
+
+ if [ ! -d "$nixpkgs_dir" ]; then
+ mkdir -p "$nixpkgs_dir"
+ fi
+
+ cd "$nixpkgs_dir"
+
+ if [ ! -e "$nixpkgs_dir"/.git ]; then
+ git init
+ fi
+
+ if git remote -v | grep -q "^config\>"; then
+ git remote remove config
+ fi
+
+ git remote add config "$git_url"
+ git fetch config
+
+ git checkout "$git_rev"
+ ' | ssh "$target" env nixpkgs_dir="$nixpkgs_dir" git_url="$git_url" git_rev="$git_rev" /bin/sh
+)}
+
# deploy : nixos-config x [user@]hostname -> ()
deploy() {(
main=$1
target=$2
+ nixpkgs_dir='/var/tmp/nixpkgs'
+
+ git_url=$(nixpkgs_url $main)
+ git_rev=$(nixpkgs_rev $main)
+
+ if [ $git_url = '' ] || [ $git_rev = '' ]; then
+ echo "specify nixpkgs.url and nixpkgs.rev in $main !"
+ exit 23
+ fi
filter=$(rsync_filter "$main")
echo "$filter" \
| rsync -f '. -' -zvrlptD --delete-excluded ./ "$target":/etc/nixos/
- ssh "$target" nixos-rebuild switch -I nixos-config=/etc/nixos/"$main"
+ clone_or_update "$target" "$nixpkgs_dir" "$git_url" "$git_rev"
+ ssh "$target" nixos-rebuild switch -I nixos-config=/etc/nixos/"$main" -I nixpkgs="$nixpkgs_dir"
+
)}
# rsync_filter : nixos-config -> rsync-filter
@@ -185,6 +227,26 @@ make_parent_dirs() {
fi
}
+# nixpkgs_url : nixos-config -> git_url
+nixpkgs_url() {
+ nix-instantiate \
+ -I nixos-config="$1" \
+ --eval \
+ --json \
+ -E '(import <nixos-config> {config={}; pkgs={};}).nixpkgs.url' \
+ | jq -r .
+}
+
+# nixpkgs_rev : nixos-config -> git_rev
+nixpkgs_rev() {
+ nix-instantiate \
+ -I nixos-config="$1" \
+ --eval \
+ --json \
+ -E '(import <nixos-config> {config={}; pkgs={};}).nixpkgs.rev' \
+ | jq -r . 2> /dev/null
+}
+
# verbose COMMAND [ARGS...]
verbose() {
echo "$@" >&2