fix: support checks without "Running phase:" output (e.g. treefmt)

Author: bitbloxhub

transform.nu

@@ -32,7 +32,13 @@ def main (file: string) {
           $status.attr | inspect
           let build_log = (do -i {
             script -efq -c $"nix log --log-format internal-json \".#checks.($system).($status.attr)\"" e+o>|
-            | awk "/Running phase:/{p=1}p"
+            | awk "/@nix/{p=1}p" # avoid any escape codes before the first @nix
+            | lines
+            | each {|row| $row | cut -c 6-}
+            | each {|row| $row | from json}
+            | where {|log| $log.action == "msg"}
+            | last
+            | $in.msg
           })
           rm ./typescript
           $status | update error $build_log