Fix devtools build (#3251)

Co-authored-by: Samuel Macleod <smacleod@cloudflare.com>

packages/wrangler-devtools/Makefile

@@ -1,21 +1,24 @@
 ROOT = $(realpath .)
+PATH_WITH_DEPOT = $(PATH):"$(ROOT)/depot/"
 # The upstream devtools commit upon which our patches are based
 HEAD = f931aec3eca7c860dc4d657f328daca19d19221d
 PATCHES = $(shell ls ${PWD}/patches/*.patch)
 depot:
 	git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git depot
 
 devtools-frontend: depot
-	$(ROOT)/depot/fetch devtools-frontend
+	git clone https://chromium.googlesource.com/devtools/devtools-frontend
+  # Ensure other depot_tools can be called from gclient config
+	PATH=$(PATH_WITH_DEPOT) $(ROOT)/depot/gclient config https://chromium.googlesource.com/devtools/devtools-frontend --unmanaged
 	git -C devtools-frontend checkout $(HEAD)
 	git -C devtools-frontend config user.email "workers-devprod@cloudflare.com"
 	git -C devtools-frontend config user.name "Workers DevProd"
 	git -C devtools-frontend am $(PATCHES)
 
 devtools-frontend/out/Default/gen/front_end: devtools-frontend
-	cd devtools-frontend && $(ROOT)/depot/gclient sync
-	cd devtools-frontend && $(ROOT)/depot/gn gen out/Default
-	cd devtools-frontend && $(ROOT)/depot/autoninja -C out/Default
+	cd devtools-frontend && PATH=$(PATH_WITH_DEPOT) $(ROOT)/depot/gclient sync
+	cd devtools-frontend && PATH=$(PATH_WITH_DEPOT) $(ROOT)/depot/gn gen out/Default
+	cd devtools-frontend && PATH=$(PATH_WITH_DEPOT) $(ROOT)/depot/autoninja -C out/Default
 
 node_modules:
 	npm ci