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use existing GID in sequoia migration script #11433

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Sep 5, 2024
Merged

use existing GID in sequoia migration script #11433

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12 changes: 9 additions & 3 deletions scripts/sequoia-nixbld-user-migration.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -17,18 +17,23 @@ any_nixbld(){
dscl . list /Users UniqueID | grep -E '\b_nixbld' >/dev/null
}

dsclattr() {
dscl . -read "$1" | awk "/$2/ { print \$2 }"
}

re_create_nixbld_user(){
local name uid

name="$1"
uid="$2"
gid="$3"

sudo /usr/bin/dscl . -create "/Users/$name" "UniqueID" "$uid"
sudo /usr/bin/dscl . -create "/Users/$name" "IsHidden" "1"
sudo /usr/bin/dscl . -create "/Users/$name" "NFSHomeDirectory" "/var/empty"
sudo /usr/bin/dscl . -create "/Users/$name" "RealName" "Nix build user $name"
sudo /usr/bin/dscl . -create "/Users/$name" "UserShell" "/sbin/nologin"
sudo /usr/bin/dscl . -create "/Users/$name" "PrimaryGroupID" "30001"
sudo /usr/bin/dscl . -create "/Users/$name" "PrimaryGroupID" "$gid"
}

hit_id_cap(){
Expand Down Expand Up @@ -68,11 +73,12 @@ temporarily_move_existing_nixbld_uids(){
}

change_nixbld_uids(){
local name next_id user_n
local existing_gid name next_id user_n

((next_id=NEW_NIX_FIRST_BUILD_UID))
((user_n=1))
name="$(nix_user_n "$user_n")"
existing_gid="$(dsclattr "/Groups/nixbld" "PrimaryGroupID")"

# we know that we have *some* nixbld users, but macOS may have
# already clobbered the first few users if this system has been
Expand All @@ -91,7 +97,7 @@ change_nixbld_uids(){
fi
done

re_create_nixbld_user "$name" "$next_id"
re_create_nixbld_user "$name" "$next_id" "$existing_gid"
echo " $name was missing; created with uid: $next_id"

((user_n++))
Expand Down
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