Merge branch 'develop' of github.com:matrix-org/synapse into erikj/xpath_fix

1 files changed, 44 insertions, 0 deletions

diff --git a/jenkins/clone.sh b/jenkins/clone.sh
new file mode 100755
index 0000000000..ab30ac7782
--- /dev/null
+++ b/jenkins/clone.sh
@@ -0,0 +1,44 @@
+#! /bin/bash
+
+# This clones a project from github into a named subdirectory
+# If the project has a branch with the same name as this branch
+# then it will checkout that branch after cloning.
+# Otherwise it will checkout "origin/develop."
+# The first argument is the name of the directory to checkout
+# the branch into.
+# The second argument is the URL of the remote repository to checkout.
+# Usually something like https://github.com/matrix-org/sytest.git
+
+set -eux
+
+NAME=$1
+PROJECT=$2
+BASE=".$NAME-base"
+
+# Update our mirror.
+if [ ! -d ".$NAME-base" ]; then
+  # Create a local mirror of the source repository.
+  # This saves us from having to download the entire repository
+  # when this script is next run.
+  git clone "$PROJECT" "$BASE" --mirror
+else
+  # Fetch any updates from the source repository.
+  (cd "$BASE"; git fetch -p)
+fi
+
+# Remove the existing repository so that we have a clean copy
+rm -rf "$NAME"
+# Cloning with --shared means that we will share portions of the
+# .git directory with our local mirror.
+git clone "$BASE" "$NAME" --shared
+
+# Jenkins may have supplied us with the name of the branch in the
+# environment. Otherwise we will have to guess based on the current
+# commit.
+: ${GIT_BRANCH:="origin/$(git rev-parse --abbrev-ref HEAD)"}
+cd "$NAME"
+# check out the relevant branch
+git checkout "${GIT_BRANCH}" || (
+    echo >&2 "No ref ${GIT_BRANCH} found, falling back to develop"
+    git checkout "origin/develop"
+)