[git] Break git sync into separate command

entrypoint.sh

@@ -1,4 +1,5 @@
 #!/bin/sh
+set -eu
 
 if [ $# -eq 0 ]; then
   echo "Please run with outliner [export|import] arguments"
@@ -6,50 +7,56 @@ if [ $# -eq 0 ]; then
 fi
 
 setup_git() {
-  chmod 0400 "$HOME/.ssh/id_rsa"
-
   if [ -f "$HOME/.ssh/id_rsa" ]; then
-    chmod 600 "$HOME.ssh/id_rsa"
+    chmod 0400 "$HOME/.ssh/id_rsa"
 
     if [ ! -d "$HOME/.ssh/id_rsa.pub" ]; then
       ssh-keygen -y -f "$HOME/.ssh/id_rsa" > "$HOME/.ssh/id_rsa.pub"
     fi
-
     echo "[+] Using SSH key for git pushes"
   else
     echo "[E] Git credentials not available, quitting"
-    exit 0
+    exit 1
   fi
+
+  eval $(ssh-agent)
+  ssh-add "$HOME/.ssh/id_rsa"
 }
 
-update_git_repo() {
-  BRANCH=${GIT_BRANCH:-master}
-  # Clone the branch in a temporary directory
-  tmp_dir=$(mktemp -d)
-  git clone "$GIT_REMOTE_URL" "$tmp_dir"
-  cp -r "$1/*" "$tmp_dir/"
-  cd "$tmp_dir" || exit 1
-  git add .
-  git commit -m "Updates: $(date)"
-  git push origin "$BRANCH"
+update_git_config() {
+  EMAIL=${GIT_EMAIL:-outliner@example.invalid}
+  git config --global user.email "$EMAIL"
+  git config --global user.name "Outliner Backup"
+  git remote add origin "$GIT_REMOTE_URL"
 }
 
 case $1 in
   export)
     shift
     bundle exec outliner-export "$@"
-
-    if [ -z "$GIT_REMOTE_URL" ]; then
-      echo "GIT_REMOTE_URL not set"
-    else
-      setup_git
-      update_git_repo "$2"
-    fi
     ;;
   import)
     shift
     bundle exec outliner-import "$@"
     ;;
+  sync)
+    tmp_dir=$(mktemp -d)
+    if [ -z "$GIT_REMOTE_URL" ]; then
+      echo "[E] GIT_REMOTE_URL not set"
+      exit 1
+    else
+      setup_git
+      bundle exec outliner-export "$tmp_dir"
+      cd "$tmp_dir"
+      git init
+      update_git_config
+      git add .
+      git commit --message "Backup: $(date)"
+      BRANCH=${GIT_BRANCH:-master}
+      git checkout -b "$BRANCH"
+      git push origin --force "$BRANCH"
+    fi
+    ;;
   *)
     echo "Invalid command, please check README"
     ;;