add deckdebug.sh utility

scripts/deckdebug.sh

@@ -0,0 +1,44 @@
+#! /usr/bin/env bash
+# Usage: deckdebug.sh DECKIP:8081
+# Dependencies: websocat jq curl chromium
+
+# https://jackson.dev/post/a-portable-nix-shell-shebang/
+if [ -z "$INSIDE_NIX_RANDOMSTRING" ] && command -v nix &> /dev/null; then
+  # If the user has nix, relaunch in nix shell with dependencies added
+  INSIDE_NIX_RANDOMSTRING=1 nix shell \
+      nixpkgs#websocat \
+      nixpkgs#jq \
+      nixpkgs#curl \
+      --command "$0" "$@"
+  exit $?
+fi
+
+chromium --remote-debugging-port=9222 &
+sleep 2
+
+ADDR=$1
+
+LOCAL=localhost:9222
+LOCALTARGETS=$(curl -s http://$LOCAL/json/list)
+LOCALTARGET=$(jq -r '.[] | select(.title=="New Tab") | .id' <<< "$LOCALTARGETS")
+echo startup tab $LOCALTARGET
+
+TARGET=0
+while :; do
+    NEWTARGET=$(curl -s http://$ADDR/json/list | jq -r '.[] | select(.title=="SharedJSContext") | .id')
+
+    if [[ $NEWTARGET != "" ]] && [[ $NEWTARGET != $TARGET ]]; then
+        echo found new tab at $NEWTARGET
+        TARGET=$NEWTARGET
+        TARGETURL="devtools://devtools/bundled/inspector.html?remoteFrontend=true&ws=$ADDR/devtools/page/$TARGET"
+
+        LOCALTARGET=$(echo '{"id": 1, "method": "Target.createTarget", "params": {"background": true, "url": "'$TARGETURL'"}}
+{"id": 2, "method": "Target.closeTarget", "params": {"targetId": "'$LOCALTARGET'"}}' \
+            | websocat ws://$LOCAL/devtools/page/$LOCALTARGET \
+            | jq -r '.result.targetId')
+
+        echo started devtools at $LOCALTARGET
+    fi
+
+    sleep 5
+done