ci: use run-tests.sh

ci/build.nix

@@ -1,12 +0,0 @@
-let
-  pkgs = import <nixpkgs> {};
-  nbPkgs = import ../pkgs { inherit pkgs; };
-  ciPkgs = with nbPkgs; [
-    electrs
-    elementsd
-    hwi
-    joinmarket
-    lightning-loop
-  ];
-in
-pkgs.writeText "ci-pkgs" (pkgs.lib.concatMapStringsSep "\n" toString ciPkgs)

ci/build.sh

@@ -21,9 +21,9 @@ fi
 echo "$NIX_PATH ($(nix eval --raw nixpkgs.lib.version))"
 
 if [[ $scenario ]]; then
-    buildExpr=$(../test/run-tests.sh --scenario $scenario exprForCI)
+    testArgs="--scenario $scenario"
 else
-    buildExpr="import ./build.nix"
+    testArgs=pkgsUnstable
 fi
 
-"${BASH_SOURCE[0]%/*}/build-to-cachix.sh" -E "$buildExpr"
+"${BASH_SOURCE[0]%/*}/../test/run-tests.sh" --ci $testArgs

test/run-tests.sh

@@ -44,6 +44,7 @@ scriptDir=$(cd "${BASH_SOURCE[0]%/*}" && pwd)
 
 scenario=
 outLinkPrefix=
+ciBuild=
 while :; do
     case $1 in
         --scenario|-s)
@@ -66,6 +67,10 @@ while :; do
                 exit 1
             fi
             ;;
+        --ci)
+            shift
+            ciBuild=1
+            ;;
         *)
             break
     esac
@@ -135,12 +140,16 @@ container() {
 doBuild() {
     name=$1
     shift
+    if [[ $ciBuild ]]; then
+        "$scriptDir/../ci/build-to-cachix.sh" "$@"
+    else
         if [[ $outLinkPrefix ]]; then
             outLink="--out-link $outLinkPrefix-$name"
         else
             outLink=--no-out-link
         fi
         nix-build $outLink "$@"
+    fi
 }
 
 # Run the test by building the test derivation
@@ -148,9 +157,12 @@ buildTest() {
     vmTestNixExpr | doBuild $scenario $outLinkArg "$@" -
 }
 
-# On continuous integration nodes there are few other processes running alongside the
-# test, so use more memory here for maximum performance.
-exprForCI() {
+vmTestNixExpr() {
+    extraQEMUOpts=
+
+    if [[ $ciBuild ]]; then
+        # On continuous integration nodes there are few other processes running alongside the
+        # test, so use more memory here for maximum performance.
         memoryMiB=4096
         memTotalKiB=$(awk '/MemTotal/ { print $2 }' /proc/meminfo)
         memAvailableKiB=$(awk '/MemAvailable/ { print $2 }' /proc/meminfo)
@@ -163,11 +175,9 @@ exprForCI() {
         # VMX is usually not available on CI nodes due to recursive virtualisation.
         # Explicitly disable VMX, otherwise QEMU 4.20 fails with message
         # "error: failed to set MSR 0x48b to 0x159ff00000000"
-    vmTestNixExpr "-cpu host,-vmx"
-}
+        extraQEMUOpts="-cpu host,-vmx"
+    fi
 
-vmTestNixExpr() {
-  extraQEMUOpts="$1"
     cat <<EOF
     ((import "$scriptDir/tests.nix" { scenario = "$scenario"; }).vm {}).overrideAttrs (old: rec {
       buildCommand = ''