add copy canton script (#18329)

* add copy canton script

* cleanup

* remove old comments

* make sure the script runs from anywhere

ci/copy-canton.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+# Copyright (c) 2024 Digital Asset (Switzerland) GmbH and/or its affiliates. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+set -euo pipefail
+
+DIR="$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
+
+if [ "$#" -ne 1 ]; then
+  echo "Usage: $0 <canton_directory>"
+  exit 1
+else
+  canton_dir=$1
+fi
+
+code_drop_dir=$DIR/../canton
+for path in community daml-common-staging README.md; do
+  rm -rf $code_drop_dir/$path
+  for f in  $(git -C "$canton_dir" ls-files $path); do
+    # we're only interested in copying files, not directories, as git-ls has
+    # explicitly expanded all directories
+    if [[ -f $canton_dir/$f ]]; then
+      # we create the parent directories of f under canton/ if they don't exist
+      mkdir -p $code_drop_dir/$(dirname $f)
+      cp $canton_dir/$f $code_drop_dir/$f
+    fi
+  done
+  git add $code_drop_dir/$path
+done

ci/cron/daily-compat.yml

@@ -238,24 +238,13 @@ jobs:
 
           ### code drop ###
 
-          copy_canton_code() {
-            canton_version=$1
-            canton_dir=$2
-
-            commitish=$(canton_version_to_commitish $canton_version)
             tmp=$(mktemp -d)
             trap "rm -rf ${tmp}" EXIT
-
+            
             git clone https://$GITHUB_TOKEN@github.com/DACH-NY/canton $tmp
-            git -C $tmp checkout $commitish
-            for path in community daml-common-staging README.md; do
-              src=$tmp/$path
-              dst=$canton_dir/$path
-              rm -rf $dst
-              mkdir -p $(dirname $dst)
-              cp -rf $src $dst
-              git add $dst
-            done
+            git -C $tmp checkout $(canton_version_to_commitish $canton3_version)
+
+            ci/copy-canton.sh $tmp
           }
 
           copy_canton_code $canton3_version canton