test: qtdragon ui-smoke runs against writable config mirror

CI run hit a PermissionError in qtvcp's logger when it tried to open
configs/sim/qtdragon/qtdragon_xyz/qtdragon.log for write: the GitHub
Actions workspace is mounted read-only for the docker build user, and
qtvcp resolves LOG_FILE = qtdragon.log into the config dir. hal_bridge
then exits, linuxcnc tears down, and the driver retries ESTOP_RESET
until the budget is exhausted.

qtdragon test.sh now mirrors the qtdragon_xyz config dir to a mktemp
directory, seds LOG_FILE to ~/qtdragon.log, and passes the absolute
INI path to run-gui.sh. run-gui.sh treats any path starting with /
as absolute; everything else still resolves under configs/sim. Trap
cleans the tmp dir on exit so the working tree stays clean.

Does not touch the shipped qtdragon config to avoid changing default
behaviour for real users. The same fix would work for any other
config that turns out to write into its own dir on CI.

Author: grandixximo

tests/ui-smoke/_lib/run-gui.sh

@@ -12,8 +12,17 @@ LIB_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 TEST_DIR="${TEST_DIR:-$(cd "$(dirname "$0")" && pwd)}"
 CONFIGS_DIR="$(cd "$LIB_DIR/../../../configs/sim" && pwd)"
 
-INI_REL="$1"
+INI_ARG="$1"
 shift
 
+# Accept either a relative path under configs/sim/ or an absolute path.
+# Absolute paths are used by tests that need to point at a writable
+# mirror of a shipped config (qtdragon writes a log file inside the
+# config dir, which is read-only on CI).
+case "$INI_ARG" in
+    /*) INI_PATH="$INI_ARG" ;;
+    *)  INI_PATH="$CONFIGS_DIR/$INI_ARG" ;;
+esac
+
 export TEST_DIR
-exec "$LIB_DIR/launch.sh" "$CONFIGS_DIR/$INI_REL" "$@"
+exec "$LIB_DIR/launch.sh" "$INI_PATH" "$@"

tests/ui-smoke/qtdragon/test.sh

@@ -1,4 +1,21 @@
 #!/bin/bash
+# qtdragon's qtvcp logger writes its log file (path from INI [DISPLAY]
+# LOG_FILE) into the config directory. CI mounts the workspace read-
+# only for the runtime user, so a relative LOG_FILE like 'qtdragon.log'
+# resolves to a path qtvcp cannot create, hal_bridge then exits, and
+# linuxcnc tears down before our driver can do anything. Mirror the
+# config dir to a writable tmp location and patch LOG_FILE to be
+# rooted at $HOME so the log lands in a directory we can write to.
+set -u
+
 LIB_DIR="$(cd "$(dirname "$0")/../_lib" && pwd)"
-exec "$LIB_DIR/run-gui.sh" qtdragon/qtdragon_xyz/qtdragon_metric.ini \
+SRC_DIR="$(cd "$LIB_DIR/../../../configs/sim/qtdragon/qtdragon_xyz" && pwd)"
+
+WORK_DIR="$(mktemp -d -t ui-smoke-qtdragon.XXXXXX)"
+trap 'rm -rf "$WORK_DIR"' EXIT
+cp -r "$SRC_DIR/." "$WORK_DIR/"
+sed -i 's|^LOG_FILE = qtdragon\.log$|LOG_FILE = ~/qtdragon.log|' \
+    "$WORK_DIR/qtdragon_metric.ini"
+
+exec "$LIB_DIR/run-gui.sh" "$WORK_DIR/qtdragon_metric.ini" \
     --run-program "$LIB_DIR/smoke.ngc" --expect-delta-mm 1,1,0