From 244712f88a7da0b74cab813d5072b263e9952014 Mon Sep 17 00:00:00 2001
From: AJ ONeal <aj@therootcompany.com>
Date: Tue, 20 Oct 2020 09:42:06 +0000
Subject: [PATCH] add mirror repo example

---
 .../org/mirror-project/deploy.sh              | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 examples/git.example.com/org/mirror-project/deploy.sh

diff --git a/examples/git.example.com/org/mirror-project/deploy.sh b/examples/git.example.com/org/mirror-project/deploy.sh
new file mode 100644
index 0000000..a313292
--- /dev/null
+++ b/examples/git.example.com/org/mirror-project/deploy.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+set -u
+set -e
+
+my_mirror=git.example.com/org/project
+echo "Mirroring ${GIT_REPO_ID}#${GIT_REF_NAME} to $my_mirror ..."
+
+# See the Git Credentials Cheat Sheet
+# https://coolaj86.com/articles/vanilla-devops-git-credentials-cheatsheet/
+if [[ ! -d "$HOME/git-mirrors/${GIT_REPO_ID}" ]]; then
+    mkdir -p "$(dirname "$HOME/git-mirrors/${GIT_REPO_ID}")"
+    git clone "${GIT_CLONE_URL}" "$HOME/git-mirrors/${GIT_REPO_ID}"
+    pushd "$HOME/git-mirrors/${GIT_REPO_ID}"
+      git remote add mirror ssh://git@${my_mirror}.git
+      git fetch --all
+    popd
+fi
+
+pushd "${HOME}/git-mirrors/${GIT_REPO_ID}"
+    # get a random branch name
+    my_tmp="$(xxd -l8 -ps /dev/urandom)"
+    # get clean
+    git reset --hard HEAD
+    # make a temp branch
+    git checkout -b "${my_tmp}"
+    # delete the existing branch, if any
+    git branch -D "${GIT_REF_NAME}"
+    # get updated
+    git fetch --force origin
+    # get the latest branch
+    git checkout --force "origin/${GIT_REF_NAME}" -b "${GIT_REF_NAME}"
+    # delete the temp branch
+    git branch -D "${my_tmp}"
+    # get the latest of this branch
+    git pull --force
+    # overwrite the mirror's copy
+    git push --force mirror "${GIT_REF_NAME}"
+popd