Use diener for Polkadot companion prs (#7102)

* Use diener for Polkadot companion prs

* Fix script

* Use gitlab env variable

* Update .maintain/gitlab/check_polkadot_companion_build.sh

Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>

Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>

substrate/.maintain/gitlab/check_polkadot_companion_build.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env sh
 #
 # check if a pr is compatible with polkadot companion pr or master if not
 # available
@@ -40,7 +40,7 @@ EOT
 git config --global user.name 'CI system'
 git config --global user.email '<>'
 
-SUBSTRATE_PATH=$(pwd)
+cargo install -f --version 0.2.0 diener
 
 # Merge master into our branch before building Polkadot to make sure we don't miss
 # any commits that are required by Polkadot.
@@ -85,14 +85,9 @@ else
   boldprint "this is not a pull request - building polkadot:master"
 fi
 
-# Make sure we override the crates in native and wasm build
+cd ..
-# patching the git path as described in the link below did not test correctly
+$CARGO_HOME/bin/diener --substrate --branch $CI_COMMIT_REF_NAME --git https://gitlab.parity.io/parity/substrate.git --path polkadot
-# https://doc.rust-lang.org/cargo/reference/overriding-dependencies.html
+cd polkadot
-mkdir .cargo
-echo "paths = [ \"$SUBSTRATE_PATH\" ]" > .cargo/config
-
-mkdir -p target/debug/wbuild/.cargo
-cp .cargo/config target/debug/wbuild/.cargo/config
 
 # Test Polkadot pr or master branch with this Substrate commit.
 time cargo test --all --release --verbose