feat: Allow pushing to different repositories

Dockerfile.ssh

@@ -0,0 +1,6 @@
+FROM alpine:3.19
+COPY --chmod=555 entrypoint-ssh.sh /bin/entrypoint.sh
+COPY --chmod=600 ssh_config /root/.ssh/config
+RUN apk add --no-cache git openssh zsh
+
+ENTRYPOINT ["zsh", "/bin/entrypoint.sh"]

entrypoint-ssh.sh

@@ -0,0 +1,48 @@
+#!/bin/zsh
+set -e
+
+branch=${PLUGIN_BRANCH:-"pages"}
+token_env=${PLUGIN_TOKEN_ENV}
+output=${PLUGIN_OUTPUT}
+name=${PLUGIN_NAME}
+email=${PLUGIN_EMAIL}
+
+# Allow passing a different push SSH URL
+clone_url=$CI_REPO_CLONE_SSH_URL
+if [[ -n "$PLUGIN_SSH_URL" ]]; then
+    clone_url=${PLUGIN_SSH_URL}
+fi
+
+if [[ -z "$token_env" || -z "$branch" || -z "$name" || -z "$email" || -z "$clone_url" ]]; then
+    echo "Invalid configuration: Token environment variable name, branch name empty, name, clone URL, or email"
+    echo "Token env: $token_env"
+    echo "branch:    $branch"
+    echo "Name:      $name"
+    echo "Email:     $email"
+    echo "Clone URL: $clone_url"
+    exit 1
+fi
+
+# Setup the SSH directory
+mkdir -p ~/.ssh
+chown root:root ~/.ssh
+chmod 700 ~/.ssh
+
+# Setup the SSH key
+print -rl -- ${(P)token_env} > ~/.ssh/id_rsa
+chown root:root ~/.ssh/id_rsa
+chmod 600 ~/.ssh/id_rsa
+
+# Setup git
+git config --global user.email "$email"
+git config --global user.name "$name"
+git config --global --add safe.directory "$CI_WORKSPACE/$CI_REPO_OWNER/$CI_REPO_NAME/$output"
+
+# Init a new repository in the output directory and add all files
+git init -b "$branch" "$output"
+cd "$output"
+git add --all
+git commit -m "Deploy new version $CI_COMMIT_SHA"
+
+# Push the repository
+git push -u "$clone_url" -f "$branch"

ssh_config

@@ -0,0 +1,3 @@
+Host *
+   StrictHostKeyChecking no
+   UserKnownHostsFile=/dev/null