Restore skip_fetch, skip_checkout, create_branch

entrypoint.sh

@@ -56,6 +56,8 @@ _main() {
 
         _set_github_output "changes_detected" "true"
 
+        _switch_to_branch
+
         _add_files
 
         # Check dirty state of repo again using git-diff.
@@ -127,6 +129,32 @@ _check_if_repository_is_in_detached_state() {
     fi
 }
 
+_switch_to_branch() {
+    echo "INPUT_BRANCH value: $INPUT_BRANCH";
+
+    # Fetch remote to make sure that repo can be switched to the right branch.
+    if "$INPUT_SKIP_FETCH"; then
+        _log "debug" "git-fetch will not be executed.";
+    else
+        git fetch --depth=1;
+    fi
+
+    # If `skip_checkout`-input is true, skip the entire checkout step.
+    if "$INPUT_SKIP_CHECKOUT"; then
+        _log "debug" "git-checkout will not be executed.";
+    else
+        # Create new local branch if `create_branch`-input is true
+        if "$INPUT_CREATE_BRANCH"; then
+            # shellcheck disable=SC2086
+            git checkout -B $INPUT_BRANCH --;
+        else
+            # Switch to branch from current Workflow run
+            # shellcheck disable=SC2086
+            git checkout $INPUT_BRANCH --;
+        fi
+    fi
+}
+
 _add_files() {
     echo "INPUT_ADD_OPTIONS: ${INPUT_ADD_OPTIONS}";
     _log "debug" "Apply add options ${INPUT_ADD_OPTIONS}";